NEC V30MZ instruction set: Difference between revisions

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__NOTOC__
__NOTOC__
Note that this page is a work in progress.
{| class="wikitable" style="text-align: center"
{| class="wikitable" style="text-align: center"
|+ Official V30MZ (80186) Instructions
|+ Official V30MZ (80186) Instructions
Line 22: Line 25:
|-
|-
| [[#STC|STC]] || [[#STD|STD]] || [[#STI|STI]] || [[#STOSB|STOSB]] || [[#STOSW|STOSW]] || [[#SUB|SUB]] || [[#TEST|TEST]] || [[#XCHG|XCHG]] || [[#XLAT|XLAT]] || [[#XOR|XOR]]
| [[#STC|STC]] || [[#STD|STD]] || [[#STI|STI]] || [[#STOSB|STOSB]] || [[#STOSW|STOSW]] || [[#SUB|SUB]] || [[#TEST|TEST]] || [[#XCHG|XCHG]] || [[#XLAT|XLAT]] || [[#XOR|XOR]]
|}
{| class="mw-collapsible mw-collapsed wikitable sortable" style="width: 340px;"
|+ style="white-space:nowrap; border:1px solid; padding:3px; border-color:rgb(162, 169, 177); background-color:rgb(234, 236, 240);" | Intel <-> NEC mnemonic translation table
!Intel
!NEC
|-
| [[#AAA|AAA]]
| [[#AAA|ADJBA]]
|-
| [[#AAD|AAD]]
| [[#AAD|CVTDB]]
|-
| [[#AAM|AAM]]
| [[#AAM|CVTBD]]
|-
| [[#AAS|AAS]]
| [[#AAS|ADJBS]]
|-
| [[#ADC|ADC]]
| [[#ADC|ADDC]]
|-
| [[#ADD|ADD]]
| [[#ADD|ADD]]
|-
| [[#AND|AND]]
| [[#AND|AND]]
|-
| [[#BOUND|BOUND]]
| [[#BOUND|CHKIND]]
|-
| [[#CALL|CALL]]
| [[#CALL|CALL]]
|-
| [[#CBW|CBW]]
| [[#CBW|CVTBW]]
|-
| [[#CLC|CLC]]
| [[#CLC|CLR1 CY]]
|-
| [[#CLD|CLD]]
| [[#CLD|CLR1 DIR]]
|-
| [[#CLI|CLI]]
| [[#CLI|DI]]
|-
| [[#CMC|CMC]]
| [[#CMC|NOT1 CY]]
|-
| [[#CMP|CMP]]
| [[#CMP|CMP]]
|-
| [[#CMPSB|CMPSB]]
| [[#CMPSB|CMPBKB]]
|-
| [[#CMPSW|CMPSW]]
| [[#CMPSW|CMPBKW]]
|-
| [[#CS|CS]]
| [[#CS|PS]]
|-
| [[#CWD|CWD]]
| [[#CWD|CVTWL]]
|-
| [[#DAA|DAA]]
| [[#DAA|ADJ4A]]
|-
| [[#DAS|DAS]]
| [[#DAS|ADJ4S]]
|-
| [[#DEC|DEC]]
| [[#DEC|DEC]]
|-
| [[#DIV|DIV]]
| [[#DIV|DIVU]]
|-
| [[#DS|DS]]
| [[#DS|DS0]]
|-
| [[#ENTER|ENTER]]
| [[#ENTER|PREPARE]]
|-
| [[#ES|ES]]
| [[#ES|DS1]]
|-
| [[#HLT|HLT]]
| [[#HLT|HALT]]
|-
| [[#IDIV|IDIV]]
| [[#IDIV|DIV]]
|-
| [[#IMUL|IMUL]]
| [[#IMUL|MUL]]
|-
| [[#IN|IN]]
| [[#IN|IN]]
|-
| [[#INC|INC]]
| [[#INC|INC]]
|-
| [[#INSB|INSB]]
| [[#INSB|INMB]]
|-
| [[#INSW|INSW]]
| [[#INSW|INMW]]
|-
| [[#INT|INT]]
| [[#INT|BRK]]
|-
| [[#INTO|INTO]]
| [[#INTO|BRKV]]
|-
| [[#IRET|IRET]]
| [[#IRET|RETI]]
|-
| [[#JA|JA]]
| [[#JA|BH]]
|-
| [[#JBE|JBE]]
| [[#JBE|BNH]]
|-
| [[#JC|JC/JB]]
| [[#JC|BC/BL]]
|-
| [[#JCXZ|JCXZ]]
| [[#JCXZ|BCWZ]]
|-
| [[#JG|JG]]
| [[#JG|BGT]]
|-
| [[#JGE|JGE]]
| [[#JGE|BGE]]
|-
| [[#JL|JL]]
| [[#JL|BLT]]
|-
| [[#JLE|JLE]]
| [[#JLE|BLE]]
|-
| [[#JMP|JMP]]
| [[#JMP|BR]]
|-
| [[#JNC|JNC/JAE]]
| [[#JNC|BNC/BNL]]
|-
| [[#JNO|JNO]]
| [[#JNO|BNV]]
|-
| [[#JNP|JNP]]
| [[#JNP|BPO]]
|-
| [[#JNS|JNS]]
| [[#JNS|BP]]
|-
| [[#JNZ|JNZ/JNE]]
| [[#JNZ|BNZ/BNE]]
|-
| [[#JO|JO]]
| [[#JO|BV]]
|-
| [[#JP|JP]]
| [[#JP|BPE]]
|-
| [[#JS|JS]]
| [[#JS|BN]]
|-
| [[#JZ|JZ/JE]]
| [[#JZ|BZ/BE]]
|-
| [[#LAHF|LAHF]]
| [[#LAHF|MOV]]
|-
| [[#LDS|LDS]]
| [[#LDS|MOV]]
|-
| [[#LEA|LEA]]
| [[#LEA|LDEA]]
|-
| [[#LEAVE|LEAVE]]
| [[#LEAVE|DISPOSE]]
|-
| [[#LES|LES]]
| [[#LES|MOV]]
|-
| [[#LOCK|LOCK]]
| [[#LOCK|BUSLOCK]]
|-
| [[#LODSB|LODSB]]
| [[#LODSB|LDMB]]
|-
| [[#LODSW|LODSW]]
| [[#LODSW|LDMW]]
|-
| [[#LOOP|LOOP]]
| [[#LOOP|DBNZ]]
|-
| [[#LOOPE|LOOPE]]
| [[#LOOPE|DBNZE]]
|-
| [[#LOOPNE|LOOPNE]]
| [[#LOOPNE|DBNZNE]]
|-
| [[#MOV|MOV]]
| [[#MOV|MOV]]
|-
| [[#MOVSB|MOVSB]]
| [[#MOVSB|MOVBKB]]
|-
| [[#MOVSW|MOVSW]]
| [[#MOVSW|MOVBKW]]
|-
| [[#MUL|MUL]]
| [[#MUL|MULU]]
|-
| [[#NEG|NEG]]
| [[#NEG|NEG]]
|-
| [[#NOP|NOP]]
| [[#NOP|NOP]]
|-
| [[#NOT|NOT]]
| [[#NOT|NOT]]
|-
| [[#OR|OR]]
| [[#OR|OR]]
|-
| [[#OUT|OUT]]
| [[#OUT|OUT]]
|-
| [[#OUTSB|OUTSB]]
| [[#OUTSB|OUTM]]
|-
| [[#OUTSW|OUTSW]]
| [[#OUTSW|OUTM]]
|-
| [[#POLL|POLL]]
| [[#POLL|POLL]]
|-
| [[#POP|POP]]
| [[#POP|POP]]
|-
| [[#POPA|POPA]]
| [[#POPA|POP]]
|-
| [[#POPF|POPF]]
| [[#POPF|POP]]
|-
| [[#PUSH|PUSH]]
| [[#PUSH|PUSH]]
|-
| [[#PUSHA|PUSHA]]
| [[#PUSHA|PUSH]]
|-
| [[#PUSHF|PUSHF]]
| [[#PUSHF|PUSH]]
|-
| [[#RCL|RCL]]
| [[#RCL|ROLC]]
|-
| [[#RCR|RCR]]
| [[#RCR|RORC]]
|-
| [[#REP|REP/REPE/REPZ]]
| [[#REP|REP/REPE/REPZ]]
|-
| [[#REPNE|REPNE/REPNZ]]
| [[#REPNE|REPNE/REPNZ]]
|-
| [[#RET|RET]]
| [[#RET|RET]]
|-
| [[#RETF|RETF]]
| [[#RETF|RET]]
|-
| [[#ROL|ROL]]
| [[#ROL|ROL]]
|-
| [[#ROR|ROR]]
| [[#ROR|ROR]]
|-
| [[#SAHF|SAHF]]
| [[#SAHF|MOV]]
|-
| [[#SAR|SAR]]
| [[#SAR|SHRA]]
|-
| [[#SBB|SBB]]
| [[#SBB|SUBC]]
|-
| [[#SCASB|SCASB]]
| [[#SCASB|CMPMB]]
|-
| [[#SCASW|SCASW]]
| [[#SCASW|CMPMW]]
|-
| [[#SHL|SHL]]
| [[#SHL|SHL]]
|-
| [[#SHR|SHR]]
| [[#SHR|SHR]]
|-
| [[#SS|SS]]
| [[#SS|SS]]
|-
| [[#STC|STC]]
| [[#STC|SET1 CY]]
|-
| [[#STD|STD]]
| [[#STD|SET1 DIR]]
|-
| [[#STI|STI]]
| [[#STI|EI]]
|-
| [[#STOSB|STOSB]]
| [[#STOSB|STMB]]
|-
| [[#STOSW|STOSW]]
| [[#STOSW|STMW]]
|-
| [[#SUB|SUB]]
| [[#SUB|SUB]]
|-
| [[#TEST|TEST]]
| [[#TEST|TEST]]
|-
| [[#XCHG|XCHG]]
| [[#XCHG|XCH]]
|-
| [[#XLAT|XLAT]]
| [[#XLAT|TRANS]]
|-
| [[#XOR|XOR]]
| [[#XOR|XOR]]
|}
|}


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| style="" | [[#POLL|POLL]]
| style="" | [[#POLL|POLL]]
| colspan="11" |
| colspan="11" |
|}
== Instruction encoding ==
=== ModR/M byte ===
The ModR/M byte is used in most addressing modes which reference a memory location. This byte consists of three bitfield values:
* <tt>oo</tt> - M'''o'''de;
* <tt>rrr</tt> - Two possible functions:
** '''R'''egister (for addressing modes which require both a register and a register/memory operand),
** Opcode extension (for some opcodes' addressing modes which do not have such a requirement);
* <tt>mmm</tt> - Register/'''M'''emory.
The ''Mode'' and ''Register/Memory'' bitfields can refer to a memory location or to a register, as shown in the table below. In some addressing modes, the ''Register'' field also refers to a register; it is always interpreted as if ''Mode'' was equal to <tt>11</tt>.


{| class="wikitable" style="text-align: center"
! R/M \ Mode
! <tt>00</tt>
! <tt>01</tt>
! <tt>10</tt>
! <tt>11</tt> ''(byte)''
! <tt>11</tt> ''(word)''
|-
| <tt>000</tt>
| DS:[BX + SI]
| DS:[BX + SI + disp8]
| DS:[BX + SI + disp16]
| AL
| AX
|-
| <tt>001</tt>
| DS:[BX + DI]
| DS:[BX + DI + disp8]
| DS:[BX + DI + disp16]
| CL
| CX
|-
| <tt>010</tt>
| SS:[BP + SI]
| SS:[BP + SI + disp8]
| SS:[BP + SI + disp16]
| DL
| DX
|-
| <tt>011</tt>
| SS:[BP + DI]
| SS:[BP + DI + disp8]
| SS:[BP + DI + disp16]
| BL
| BX
|-
| <tt>100</tt>
| DS:[SI]
| DS:[SI + disp8]
| DS:[SI + disp16]
| AH
| SP
|-
| <tt>101</tt>
| DS:[DI]
| DS:[DI + disp8]
| DS:[DI + disp16]
| CH
| BP
|-
| <tt>110</tt>
| ''DS:[disp16]''
| SS:[BP + disp8]
| SS:[BP + disp16]
| DH
| SI
|-
| <tt>111</tt>
| DS:[BX]
| DS:[BX + disp8]
| DS:[BX + disp16]
| BH
| DI
|}
|}
Displacements are either 8-bit (disp8) or 16-bit (disp16) signed values and they always immediately follow the ModR/M byte. Note that (<tt>oo</tt> = <tt>00</tt>, <tt>mmm</tt> = <tt>110</tt>) is a special case, in which the ''disp16'' value is used directly as a near pointer.
The instruction encoding lists below refer to this byte as <tt>oorrrmmm</tt> (binary), <tt>/r</tt> (hexadecimal) or <tt>/0</tt> (hexademical, <tt>rrr</tt> used as function <tt>0</tt>).


== Official instructions ==
== Official instructions ==
Line 192: Line 610:
=== AAA ===
=== AAA ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| AAA || <tt>37</tt> || <tt>00110111</tt> || 1 || 9
|}
----
{{Anchor|AAD}}
{{Anchor|AAD}}
=== AAD ===
=== AAD ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| AAD imm8 || <tt>B5 ii</tt> || <tt>11010100 iiiiiiii</tt> || 2 || 6
|}
----
{{Anchor|AAM}}
{{Anchor|AAM}}
=== AAM ===
=== AAM ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| AAM imm8 || <tt>B4 ii</tt> || <tt>11010100 iiiiiiii</tt> || 2 || 17
|}
----
{{Anchor|AAS}}
{{Anchor|AAS}}
=== AAS ===
=== AAS ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| AAS || <tt>3F</tt> || <tt>00111111</tt> || 1 || 9
|}
----
{{Anchor|ADC}}
{{Anchor|ADC}}
=== ADC ===
=== ADC ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| ADC AL, imm || <tt>14 ii</tt> || <tt>00010100 iiiiiiii</tt> || 2 || 1
|-
| ADC AX, imm || <tt>15 ii ii</tt> || <tt>00010101 iiiiiiii iiiiiiii</tt> || 3 || 1
|-
| ADC mem8, imm8 || <tt>80 /2 ii</tt> || <tt>10000000 oo010mmm iiiiiiii</tt> || 3+ || 3
|-
| ADC mem16, imm16 || <tt>81 /2 ii ii</tt> || <tt>10000001 oo010mmm iiiiiiii iiiiiiii</tt> || 4+ || 3
|-
| ADC mem16, simm8 || <tt>83 /2 ii</tt> || <tt>10000011 oo010mmm iiiiiiii</tt> || 3+ || 3
|-
| ADC mem8, reg8 || <tt>10 /r</tt> || <tt>00010000 oorrrmmm</tt> || 2+ || 3
|-
| ADC mem16, reg16 || <tt>11 /r</tt> || <tt>00010001 oorrrmmm</tt> || 2+ || 3
|-
| ADC reg8, imm8 || <tt>80 /2 ii</tt> || <tt>10000000 11010mmm iiiiiiii</tt> || 3 || 1
|-
| ADC reg16, imm16 || <tt>81 /2 ii ii</tt> || <tt>10000001 11010mmm iiiiiiii iiiiiiii</tt> || 4 || 1
|-
| ADC reg16, simm8 || <tt>83 /2 ii</tt> || <tt>10000011 11010mmm iiiiiiii</tt> || 3 || 1
|-
| ADC reg8, mem8 || <tt>12 /r</tt> || <tt>00010010 oorrrmmm</tt> || 2+ || 2
|-
| ADC reg16, mem16 || <tt>13 /r</tt> || <tt>00010011 oorrrmmm</tt> || 2+ || 2
|-
| ADC reg8, reg8 || <tt>10 /r</tt> || <tt>000100.0 11rrrmmm</tt> || 2 || 1
|-
| ADC reg16, reg16 || <tt>11 /r</tt> || <tt>000100.1 11rrrmmm</tt> || 2 || 1
|}
----
{{Anchor|ADD}}
{{Anchor|ADD}}
=== ADD ===
=== ADD ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| ADD AL, imm || <tt>04 ii</tt> || <tt>00000100 iiiiiiii</tt> || 2 || 1
|-
| ADD AX, imm || <tt>05 ii ii</tt> || <tt>00000101 iiiiiiii iiiiiiii</tt> || 3 || 1
|-
| ADD mem8, imm8 || <tt>80 /0 ii</tt> || <tt>10000000 oo000mmm iiiiiiii</tt> || 3+ || 3
|-
| ADD mem16, imm16 || <tt>81 /0 ii ii</tt> || <tt>10000001 oo000mmm iiiiiiii iiiiiiii</tt> || 4+ || 3
|-
| ADD mem16, simm8 || <tt>83 /0 ii</tt> || <tt>10000011 oo000mmm iiiiiiii</tt> || 3+ || 3
|-
| ADD mem8, reg8 || <tt>00 /r</tt> || <tt>00000000 oorrrmmm</tt> || 2+ || 3
|-
| ADD mem16, reg16 || <tt>01 /r</tt> || <tt>00000001 oorrrmmm</tt> || 2+ || 3
|-
| ADD reg8, imm8 || <tt>80 /0 ii</tt> || <tt>10000000 11000mmm iiiiiiii</tt> || 3 || 1
|-
| ADD reg16, imm16 || <tt>81 /0 ii ii</tt> || <tt>10000001 11000mmm iiiiiiii iiiiiiii</tt> || 4 || 1
|-
| ADD reg16, simm8 || <tt>83 /0 ii</tt> || <tt>10000011 11000mmm iiiiiiii</tt> || 3 || 1
|-
| ADD reg8, mem8 || <tt>02 /r</tt> || <tt>00000010 oorrrmmm</tt> || 2+ || 2
|-
| ADD reg16, mem16 || <tt>03 /r</tt> || <tt>00000011 oorrrmmm</tt> || 2+ || 2
|-
| ADD reg8, reg8 || <tt>00 /r</tt> || <tt>000000.0 11rrrmmm</tt> || 2 || 1
|-
| ADD reg16, reg16 || <tt>01 /r</tt> || <tt>000000.1 11rrrmmm</tt> || 2 || 1
|}
----
{{Anchor|AND}}
{{Anchor|AND}}
=== AND ===
=== AND ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| AND AL, imm || <tt>24 ii</tt> || <tt>00100100 iiiiiiii</tt> || 2 || 1
|-
| AND AX, imm || <tt>25 ii ii</tt> || <tt>00100101 iiiiiiii iiiiiiii</tt> || 3 || 1
|-
| AND mem8, imm8 || <tt>80 /4 ii</tt> || <tt>10000000 oo100mmm iiiiiiii</tt> || 3+ || 3
|-
| AND mem16, imm16 || <tt>81 /4 ii ii</tt> || <tt>10000001 oo100mmm iiiiiiii iiiiiiii</tt> || 4+ || 3
|-
| AND mem16, simm8 || <tt>83 /4 ii</tt> || <tt>10000011 oo100mmm iiiiiiii</tt> || 3+ || 3
|-
| AND mem8, reg8 || <tt>20 /r</tt> || <tt>00100000 oorrrmmm</tt> || 2+ || 3
|-
| AND mem16, reg16 || <tt>21 /r</tt> || <tt>00100001 oorrrmmm</tt> || 2+ || 3
|-
| AND reg8, imm8 || <tt>80 /4 ii</tt> || <tt>10000000 11100mmm iiiiiiii</tt> || 3 || 1
|-
| AND reg16, imm16 || <tt>81 /4 ii ii</tt> || <tt>10000001 11100mmm iiiiiiii iiiiiiii</tt> || 4 || 1
|-
| AND reg16, simm8 || <tt>83 /4 ii</tt> || <tt>10000011 11100mmm iiiiiiii</tt> || 3 || 1
|-
| AND reg8, mem8 || <tt>22 /r</tt> || <tt>00100010 oorrrmmm</tt> || 2+ || 2
|-
| AND reg16, mem16 || <tt>23 /r</tt> || <tt>00100011 oorrrmmm</tt> || 2+ || 2
|-
| AND reg8, reg8 || <tt>20 /r</tt> || <tt>001000.0 11rrrmmm</tt> || 2 || 1
|-
| AND reg16, reg16 || <tt>21 /r</tt> || <tt>001000.1 11rrrmmm</tt> || 2 || 1
|}
----
{{Anchor|BOUND}}
{{Anchor|BOUND}}
=== BOUND ===
=== BOUND ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| BOUND reg16, mem16:16 || <tt>62 /r</tt> || <tt>01100010 oorrrmmm</tt> || 2+ || 13 (20 if condition met)
|}
----
{{Anchor|CALL}}
{{Anchor|CALL}}
=== CALL ===
=== CALL ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| CALL ptr16:16 || <tt>CA oo oo ss ss</tt> || <tt>10011010 oooooooo oooooooo ssssssss ssssssss</tt> || 5 || 10
|-
| CALL mem16 || <tt>FF /2</tt> || <tt>11111111 oo010mmm</tt> || 2+ || 6
|-
| CALL mem16:16 || <tt>FF /3</tt> || <tt>11111111 oo011mmm</tt> || 2+ || 12
|-
| CALL reg16 || <tt>FF /2</tt> || <tt>11111111 11010mmm</tt> || 2 || 5
|-
| CALL rel16 || <tt>E8 ii ii</tt> || <tt>11101000 iiiiiiii iiiiiiii</tt> || 3 || 5
|}
----
{{Anchor|CBW}}
{{Anchor|CBW}}
=== CBW ===
=== CBW ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| CBW || <tt>98</tt> || <tt>10011000</tt> || 1 || 1
|}
----
{{Anchor|CLC}}
{{Anchor|CLC}}
=== CLC ===
=== CLC ===


{| class="wikitable"
! Flag !! New value
|-
| [[NEC_V30MZ_flags#CF|CF - Carry]] || 0
|}
{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| CLC || <tt>F8</tt> || <tt>11111000</tt> || 1 || 4
|}
----
{{Anchor|CLD}}
{{Anchor|CLD}}
=== CLD ===
=== CLD ===


{| class="wikitable"
! Flag !! New value
|-
| [[NEC_V30MZ_flags#DF|DF - Direction]] || 0
|}
{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| CLD || <tt>FC</tt> || <tt>11111100</tt> || 1 || 4
|}
----
{{Anchor|CLI}}
{{Anchor|CLI}}
=== CLI ===
=== CLI ===


{| class="wikitable"
! Flag !! New value
|-
| [[NEC_V30MZ_flags#IF|IF - Interrupt]] || 0
|}
{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| CLI || <tt>FA</tt> || <tt>11111010</tt> || 1 || 4
|}
----
{{Anchor|CMC}}
{{Anchor|CMC}}
=== CMC ===
=== CMC ===


{| class="wikitable"
! Flag !! New value
|-
| [[NEC_V30MZ_flags#CF|CF - Carry]] || !CF
|}
{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| CMC || <tt>F5</tt> || <tt>11110101</tt> || 1 || 4
|}
----
{{Anchor|CMP}}
{{Anchor|CMP}}
=== CMP ===
=== CMP ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| CMP AL, imm || <tt>3C ii</tt> || <tt>00111100 iiiiiiii</tt> || 2 || 1
|-
| CMP AX, imm || <tt>3D ii ii</tt> || <tt>00111101 iiiiiiii iiiiiiii</tt> || 3 || 1
|-
| CMP mem8, imm8 || <tt>80 /7 ii</tt> || <tt>10000000 oo111mmm iiiiiiii</tt> || 3+ || 2
|-
| CMP mem16, imm16 || <tt>81 /7 ii ii</tt> || <tt>10000001 oo111mmm iiiiiiii iiiiiiii</tt> || 4+ || 2
|-
| CMP mem16, simm8 || <tt>83 /7 ii</tt> || <tt>10000011 oo111mmm iiiiiiii</tt> || 3+ || 2
|-
| CMP mem8, reg8 || <tt>38 /r</tt> || <tt>00111000 oorrrmmm</tt> || 2+ || 2
|-
| CMP mem16, reg16 || <tt>39 /r</tt> || <tt>00111001 oorrrmmm</tt> || 2+ || 2
|-
| CMP reg8, imm8 || <tt>80 /7 ii</tt> || <tt>10000000 11111mmm iiiiiiii</tt> || 3 || 1
|-
| CMP reg16, imm16 || <tt>81 /7 ii ii</tt> || <tt>10000001 11111mmm iiiiiiii iiiiiiii</tt> || 4 || 1
|-
| CMP reg16, simm8 || <tt>83 /7 ii</tt> || <tt>10000011 11111mmm iiiiiiii</tt> || 3 || 1
|-
| CMP reg8, mem8 || <tt>3A /r</tt> || <tt>00111010 oorrrmmm</tt> || 2+ || 2
|-
| CMP reg16, mem16 || <tt>3B /r</tt> || <tt>00111011 oorrrmmm</tt> || 2+ || 2
|-
| CMP reg8, reg8 || <tt>38 /r</tt> || <tt>001110.0 11rrrmmm</tt> || 2 || 1
|-
| CMP reg16, reg16 || <tt>39 /r</tt> || <tt>001110.1 11rrrmmm</tt> || 2 || 1
|}
----
{{Anchor|CMPSB}}
{{Anchor|CMPSB}}
=== CMPSB ===
{{Anchor|CMPSW}}
=== CMPSB/CMPSW ===


{{Anchor|CMPSW}}
{| class="wikitable sortable"
=== CMPSW ===
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| CMPSB || <tt>A6</tt> || <tt>10100110</tt> || 1 || 6
|-
| CMPSW || <tt>A7</tt> || <tt>10100111</tt> || 1 || 6
|}


----
{{Anchor|CS}}
{{Anchor|CS}}
=== CS ===
=== CS ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| CS || <tt>2E</tt> || <tt>00101110</tt> || 1 || 1
|}
----
{{Anchor|CWD}}
{{Anchor|CWD}}
=== CWD ===
=== CWD ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| CWD || <tt>99</tt> || <tt>10011001</tt> || 1 || 1
|}
----
{{Anchor|DAA}}
{{Anchor|DAA}}
=== DAA ===
=== DAA ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| DAA || <tt>27</tt> || <tt>00100111</tt> || 1 || 10
|}
----
{{Anchor|DAS}}
{{Anchor|DAS}}
=== DAS ===
=== DAS ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| DAS || <tt>2F</tt> || <tt>00101111</tt> || 1 || 10
|}
----
{{Anchor|DEC}}
{{Anchor|DEC}}
=== DEC ===
=== DEC ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| DEC mem8 || <tt>FE /1</tt> || <tt>11111110 oo001mmm</tt> || 2+ || 3
|-
| DEC mem16 || <tt>FF /1</tt> || <tt>11111111 oo001mmm</tt> || 2+ || 3
|-
| DEC reg8 || <tt>FE /1</tt> || <tt>11111110 11001mmm</tt> || 2+ || 1
|-
| DEC reg16 || <tt>4x</tt> || <tt>01001rrr</tt> || 1 || 1
|}
----
{{Anchor|DIV}}
{{Anchor|DIV}}
=== DIV ===
=== DIV ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| DIV mem8 || <tt>F6 /6</tt> || <tt>11110110 oo110mmm</tt> || 2+ || 16
|-
| DIV mem16 || <tt>F7 /6</tt> || <tt>11111111 oo110mmm</tt> || 2+ || 24
|-
| DIV reg8 || <tt>F6 /6</tt> || <tt>11111110 11110mmm</tt> || 2 || 15
|-
| DIV reg16 || <tt>F7 /6</tt> || <tt>11111111 11110mmm</tt> || 2 || 23
|}
----
{{Anchor|DS}}
{{Anchor|DS}}
=== DS ===
=== DS ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| DS || <tt>3E</tt> || <tt>00111110</tt> || 1 || 1
|}
----
{{Anchor|ENTER}}
{{Anchor|ENTER}}
=== ENTER ===
=== ENTER ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| ENTER imm16, imm8 || <tt>C8 ii ii jj</tt> || <tt>11001000 iiiiiiii iiiiiiii jjjjjjjj</tt> || 3 || 8 (imm8 = 0)<br/>14 (imm8 = 1)<br/>15 + imm8 * 4 (imm8 >= 2)
|}
----
{{Anchor|ES}}
{{Anchor|ES}}
=== ES ===
=== ES ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| ES || <tt>26</tt> || <tt>00100110</tt> || 1 || 1
|}
----
{{Anchor|HLT}}
{{Anchor|HLT}}
=== HLT ===
=== HLT ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| HLT || <tt>F4</tt> || <tt>11110100</tt> || 1 || 9
|}
----
{{Anchor|IDIV}}
{{Anchor|IDIV}}
=== IDIV ===
=== IDIV ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| IDIV mem8 || <tt>F6 /7</tt> || <tt>11110110 oo111mmm</tt> || 2+ || 18
|-
| IDIV mem16 || <tt>F7 /7</tt> || <tt>11111111 oo111mmm</tt> || 2+ || 25
|-
| IDIV reg8 || <tt>F6 /7</tt> || <tt>11111110 11111mmm</tt> || 2 || 17
|-
| IDIV reg16 || <tt>F7 /7</tt> || <tt>11111111 11111mmm</tt> || 2 || 24
|}
----
{{Anchor|IMUL}}
{{Anchor|IMUL}}
=== IMUL ===
=== IMUL ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| IMUL mem8 || <tt>F6 /5</tt> || <tt>11110110 oo101mmm</tt> || 2+ || 4
|-
| IMUL mem16 || <tt>F7 /5</tt> || <tt>11111111 oo101mmm</tt> || 2+ || 4
|-
| IMUL reg8 || <tt>F6 /5</tt> || <tt>11111110 11101mmm</tt> || 2 || 3
|-
| IMUL reg16 || <tt>F7 /5</tt> || <tt>11111111 11101mmm</tt> || 2 || 3
|-
| IMUL reg16, mem16, imm16 || <tt>69 /r ii ii</tt> || <tt>11111111 oorrrmmm iiiiiiii iiiiiiii</tt> || 4 || 4
|-
| IMUL reg16, mem16, simm8 || <tt>6B /r ii</tt> || <tt>11111111 oorrrmmm iiiiiiii</tt> || 3 || 4
|-
| IMUL reg16, reg16, imm16 || <tt>69 /r ii ii</tt> || <tt>11111111 11rrrmmm iiiiiiii iiiiiiii</tt> || 4 || 3
|-
| IMUL reg16, reg16, simm8 || <tt>6B /r ii</tt> || <tt>11111111 11rrrmmm iiiiiiii</tt> || 3 || 3
|}
----
{{Anchor|IN}}
{{Anchor|IN}}
=== IN ===
=== IN ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| IN AL, DX || <tt>EC</tt> || <tt>11101100</tt> || 1 || 6
|-
| IN AX, DX || <tt>ED</tt> || <tt>11101101</tt> || 1 || 6
|-
| IN AL, imm8 || <tt>E4 ii</tt> || <tt>11100100 iiiiiiii</tt> || 2 || 6
|-
| IN AX, imm8 || <tt>E5 ii</tt> || <tt>11100101 iiiiiiii</tt> || 2 || 6
|}
----
{{Anchor|INC}}
{{Anchor|INC}}
=== INC ===
=== INC ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| INC mem8 || <tt>FE /0</tt> || <tt>11111110 oo000mmm</tt> || 2+ || 3
|-
| INC mem16 || <tt>FF /0</tt> || <tt>11111111 oo000mmm</tt> || 2+ || 3
|-
| INC reg8 || <tt>FE /0</tt> || <tt>11111110 11000mmm</tt> || 2+ || 1
|-
| INC reg16 || <tt>4x</tt> || <tt>01000rrr</tt> || 1 || 1
|}
----
{{Anchor|INSB}}
{{Anchor|INSB}}
=== INSB ===
{{Anchor|INSW}}
=== INSB/INSW ===


{{Anchor|INSW}}
{| class="wikitable sortable"
=== INSW ===
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| INSB || <tt>6C</tt> || <tt>01101100</tt> || 1 || 6
|-
| INSW || <tt>6D</tt> || <tt>01101101</tt> || 1 || 6
|}


----
{{Anchor|INT}}
{{Anchor|INT}}
=== INT ===
=== INT ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| INT 3 || <tt>CC</tt> || <tt>11001100</tt> || 1 || 9
|-
| INT imm8 || <tt>CD ii</tt> || <tt>11001101 iiiiiiii</tt> || 2 || 10
|}
----
{{Anchor|INTO}}
{{Anchor|INTO}}
=== INTO ===
=== INTO ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| INTO || <tt>CE</tt> || <tt>11001110</tt> || 1 || 6 (13 if OF = 1)
|}
----
{{Anchor|IRET}}
{{Anchor|IRET}}
=== IRET ===
=== IRET ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| IRET || <tt>CF</tt> || <tt>11001111</tt> || 1 || 10
|}
----
{{Anchor|JA}}
{{Anchor|JA}}
=== JA ===
=== JA ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| JA rel8 || <tt>77 ii</tt> || <tt>01110111 iiiiiiii</tt> || 2 || 1 (4 if branch taken)
|}
----
{{Anchor|JBE}}
{{Anchor|JBE}}
=== JBE ===
=== JBE ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| JA rel8 || <tt>76 ii</tt> || <tt>01110110 iiiiiiii</tt> || 2 || 1 (4 if branch taken)
|}
----
{{Anchor|JC}}
{{Anchor|JC}}
=== JC/JB ===
=== JC/JB ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| JC rel8 || <tt>72 ii</tt> || <tt>01110010 iiiiiiii</tt> || 2 || 1 (4 if branch taken)
|}
----
{{Anchor|JCXZ}}
{{Anchor|JCXZ}}
=== JCXZ ===
=== JCXZ ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| JCXZ rel8 || <tt>E3 ii</tt> || <tt>11100011 iiiiiiii</tt> || 2 || 1 (4 if branch taken)
|}
----
{{Anchor|JG}}
{{Anchor|JG}}
=== JG ===
=== JG ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| JG rel8 || <tt>7F ii</tt> || <tt>01111111 iiiiiiii</tt> || 2 || 1 (4 if branch taken)
|}
----
{{Anchor|JGE}}
{{Anchor|JGE}}
=== JGE ===
=== JGE ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| JGE rel8 || <tt>7D ii</tt> || <tt>01111101 iiiiiiii</tt> || 2 || 1 (4 if branch taken)
|}
----
{{Anchor|JL}}
{{Anchor|JL}}
=== JL ===
=== JL ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| JL rel8 || <tt>7C ii</tt> || <tt>01111100 iiiiiiii</tt> || 2 || 1 (4 if branch taken)
|}
----
{{Anchor|JLE}}
{{Anchor|JLE}}
=== JLE ===
=== JLE ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| JLE rel8 || <tt>7E ii</tt> || <tt>01111110 iiiiiiii</tt> || 2 || 1 (4 if branch taken)
|}
----
{{Anchor|JMP}}
{{Anchor|JMP}}
=== JMP ===
=== JMP ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| JMP ptr16:16 || <tt>EA oo oo ss ss</tt> || <tt>11101010 oooooooo oooooooo ssssssss ssssssss</tt> || 5 || 7
|-
| JMP mem16 || <tt>FF /4</tt> || <tt>11111111 oo100mmm</tt> || 2+ || 5
|-
| JMP mem16:16 || <tt>FF /5</tt> || <tt>11111111 oo101mmm</tt> || 2+ || 10
|-
| JMP reg16 || <tt>FF /4</tt> || <tt>11111111 11100mmm</tt> || 2 || 4
|-
| JMP rel8 || <tt>EB ii</tt> || <tt>11101011 iiiiiiii</tt> || 2 || 4
|-
| JMP rel16 || <tt>E9 ii ii</tt> || <tt>11101001 iiiiiiii iiiiiiii</tt> || 3 || 4
|}
----
{{Anchor|JNC}}
{{Anchor|JNC}}
=== JNC/JAE ===
=== JNC/JAE ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| JNC rel8 || <tt>73 ii</tt> || <tt>01110011 iiiiiiii</tt> || 2 || 1 (4 if branch taken)
|}
----
{{Anchor|JNO}}
{{Anchor|JNO}}
=== JNO ===
=== JNO ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| JNO rel8 || <tt>71 ii</tt> || <tt>01110001 iiiiiiii</tt> || 2 || 1 (4 if branch taken)
|}
----
{{Anchor|JNP}}
{{Anchor|JNP}}
=== JNP ===
=== JNP ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| JNP rel8 || <tt>7B ii</tt> || <tt>01111011 iiiiiiii</tt> || 2 || 1 (4 if branch taken)
|}
----
{{Anchor|JNS}}
{{Anchor|JNS}}
=== JNS ===
=== JNS ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| JNS rel8 || <tt>79 ii</tt> || <tt>01111001 iiiiiiii</tt> || 2 || 1 (4 if branch taken)
|}
----
{{Anchor|JNZ}}
{{Anchor|JNZ}}
=== JNZ/JNE ===
=== JNZ/JNE ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| JNZ rel8 || <tt>75 ii</tt> || <tt>01110101 iiiiiiii</tt> || 2 || 1 (4 if branch taken)
|}
----
{{Anchor|JO}}
{{Anchor|JO}}
=== JO ===
=== JO ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| JO rel8 || <tt>70 ii</tt> || <tt>01110000 iiiiiiii</tt> || 2 || 1 (4 if branch taken)
|}
----
{{Anchor|JP}}
{{Anchor|JP}}
=== JP ===
=== JP ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| JP rel8 || <tt>7A ii</tt> || <tt>01111010 iiiiiiii</tt> || 2 || 1 (4 if branch taken)
|}
----
{{Anchor|JS}}
{{Anchor|JS}}
=== JS ===
=== JS ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| JS rel8 || <tt>78 ii</tt> || <tt>01111000 iiiiiiii</tt> || 2 || 1 (4 if branch taken)
|}
----
{{Anchor|JZ}}
{{Anchor|JZ}}
=== JZ/JE ===
=== JZ/JE ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| JZ rel8 || <tt>74 ii</tt> || <tt>01110100 iiiiiiii</tt> || 2 || 1 (4 if branch taken)
|}
----
{{Anchor|LAHF}}
{{Anchor|LAHF}}
=== LAHF ===
=== LAHF ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| LAHF || <tt>9F</tt> || <tt>10011111</tt> || 1 || 2
|}
----
{{Anchor|LDS}}
{{Anchor|LDS}}
=== LDS ===
=== LDS ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| LDS reg16, mem16 || <tt>C5 /r</tt> || <tt>11000101 oorrrmmm</tt> || 2+ || 6
|}
----
{{Anchor|LEA}}
{{Anchor|LEA}}
=== LEA ===
=== LEA ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| LEA reg16, mem16 || <tt>8D /r</tt> || <tt>10001101 oorrrmmm</tt> || 2+ || 1
|}
----
{{Anchor|LEAVE}}
{{Anchor|LEAVE}}
=== LEAVE ===
=== LEAVE ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| LEAVE || <tt>C9</tt> || <tt>11001001</tt> || 1 || 2
|}
----
{{Anchor|LES}}
{{Anchor|LES}}
=== LES ===
=== LES ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| LES reg16, mem16 || <tt>C4 /r</tt> || <tt>11000100 oorrrmmm</tt> || 2+ || 6
|}
----
{{Anchor|LOCK}}
{{Anchor|LOCK}}
=== LOCK ===
=== LOCK ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| LOCK || <tt>F0</tt> || <tt>11110000</tt> || 1 || 1
|}
----
{{Anchor|LODSB}}
{{Anchor|LODSB}}
=== LODSB ===
{{Anchor|LODSW}}
=== LODSB/LODSW ===


{{Anchor|LODSW}}
{| class="wikitable sortable"
=== LODSW ===
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| LODSB || <tt>AC</tt> || <tt>10101100</tt> || 1 || 3
|-
| LODSW || <tt>AD</tt> || <tt>10101101</tt> || 1 || 3
|}


----
{{Anchor|LOOP}}
{{Anchor|LOOP}}
=== LOOP ===
=== LOOP ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| LOOP rel8 || <tt>E2 ii</tt> || <tt>11100010 iiiiiiii</tt> || 2 || 2 (5 if branch taken)
|}
----
{{Anchor|LOOPE}}
{{Anchor|LOOPE}}
=== LOOPE ===
=== LOOPE ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| LOOPE rel8 || <tt>E1 ii</tt> || <tt>11100001 iiiiiiii</tt> || 2 || 3 (6 if branch taken)
|}
----
{{Anchor|LOOPNE}}
{{Anchor|LOOPNE}}
=== LOOPNE ===
=== LOOPNE ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| LOOPNE rel8 || <tt>E0 ii</tt> || <tt>11100000 iiiiiiii</tt> || 2 || 3 (6 if branch taken)
|}
----
{{Anchor|MOV}}
{{Anchor|MOV}}
=== MOV ===
=== MOV ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| MOV AL, ptr16 || <tt>A0 ii ii</tt> || <tt>10100000 iiiiiiii iiiiiiii</tt> || 3 || 1
|-
| MOV AX, ptr16 || <tt>A1 ii ii</tt> || <tt>10100001 iiiiiiii iiiiiiii</tt> || 3 || 1
|-
| MOV mem8, imm8 || <tt>C6 /0 ii</tt> || <tt>11000110 oo000mmm iiiiiiii</tt> || 3+ || 1
|-
| MOV mem16, imm16 || <tt>C7 /0 ii ii</tt> || <tt>11000111 oo000mmm iiiiiiii iiiiiiii</tt> || 4+ || 1
|-
| MOV mem8, reg8 || <tt>84 /r</tt> || <tt>10001000 oorrrmmm</tt> || 2+ || 1
|-
| MOV mem16, reg16 || <tt>85 /r</tt> || <tt>10001001 oorrrmmm</tt> || 2+ || 1
|-
| MOV mem16, sreg16 || <tt>8C /r</tt> || <tt>10001100 oo0rrmmm</tt> || 2+ || 3
|-
| MOV ptr16, AL || <tt>A2 ii ii</tt> || <tt>10100010 iiiiiiii iiiiiiii</tt> || 3 || 1
|-
| MOV ptr16, AX || <tt>A3 ii ii</tt> || <tt>10100011 iiiiiiii iiiiiiii</tt> || 3 || 1
|-
| MOV reg8, imm8 || <tt>Bx ii</tt> || <tt>10110rrr iiiiiiii</tt> || 2 || 1
|-
| MOV reg8, imm8 || <tt>C6 /0 ii</tt> || <tt>11000110 11000mmm iiiiiiii</tt> || 3 || 1
|-
| MOV reg16, imm16 || <tt>Bx ii</tt> || <tt>10111rrr iiiiiiii iiiiiiii</tt> || 3 || 1
|-
| MOV reg16, imm16 || <tt>C7 /0 ii ii</tt> || <tt>11000111 11000mmm iiiiiiii iiiiiiii</tt> || 4 || 1
|-
| MOV reg8, mem8 || <tt>8A /r</tt> || <tt>10001010 oorrrmmm</tt> || 2+ || 1
|-
| MOV reg16, mem16 || <tt>8B /r</tt> || <tt>10001011 oorrrmmm</tt> || 2+ || 1
|-
| MOV reg8, reg8 || <tt>88 /r</tt> || <tt>100010.0 11rrrmmm</tt> || 2 || 1
|-
| MOV reg16, reg16 || <tt>89 /r</tt> || <tt>100010.1 11rrrmmm</tt> || 2 || 1
|-
| MOV reg16, sreg16 || <tt>8C /r</tt> || <tt>10001100 110rrmmm</tt> || 2 || 1
|-
| MOV sreg16, mem16 || <tt>8E /r</tt> || <tt>10001110 oo0rrmmm</tt> || 2 || 3
|-
| MOV sreg16, reg16 || <tt>8E /r</tt> || <tt>10001110 110rrmmm</tt> || 2+ || 2
|}
----
{{Anchor|MOVSB}}
{{Anchor|MOVSB}}
=== MOVSB ===
{{Anchor|MOVSW}}
=== MOVSB/MOVSW ===


{{Anchor|MOVSW}}
{| class="wikitable sortable"
=== MOVSW ===
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| MOVSB || <tt>A4</tt> || <tt>10100100</tt> || 1 || 5
|-
| MOVSW || <tt>A5</tt> || <tt>10100101</tt> || 1 || 5
|}


----
{{Anchor|MUL}}
{{Anchor|MUL}}
=== MUL ===
=== MUL ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| MUL mem8 || <tt>F6 /4</tt> || <tt>11110110 oo100mmm</tt> || 2+ || 4
|-
| MUL mem16 || <tt>F7 /4</tt> || <tt>11111111 oo100mmm</tt> || 2+ || 4
|-
| MUL reg8 || <tt>F6 /4</tt> || <tt>11111110 11100mmm</tt> || 2 || 3
|-
| MUL reg16 || <tt>F7 /4</tt> || <tt>11111111 11100mmm</tt> || 2 || 3
|}
----
{{Anchor|NEG}}
{{Anchor|NEG}}
=== NEG ===
=== NEG ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| NEG mem8 || <tt>F6 /3</tt> || <tt>11110110 oo011mmm</tt> || 2+ || 3
|-
| NEG mem16 || <tt>F7 /3</tt> || <tt>11111111 oo011mmm</tt> || 2+ || 3
|-
| NEG reg8 || <tt>F6 /3</tt> || <tt>11111110 11011mmm</tt> || 2 || 1
|-
| NEG reg16 || <tt>F7 /3</tt> || <tt>11111111 11011mmm</tt> || 2 || 1
|}
----
{{Anchor|NOP}}
{{Anchor|NOP}}
=== NOP ===
=== NOP ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| NOP || <tt>90</tt> || <tt>10010000</tt> || 1 || 1
|}
----
{{Anchor|NOT}}
{{Anchor|NOT}}
=== NOT ===
=== NOT ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| NOT mem8 || <tt>F6 /2</tt> || <tt>11110110 oo010mmm</tt> || 2+ || 3
|-
| NOT mem16 || <tt>F7 /2</tt> || <tt>11111111 oo010mmm</tt> || 2+ || 3
|-
| NOT reg8 || <tt>F6 /2</tt> || <tt>11111110 11010mmm</tt> || 2 || 1
|-
| NOT reg16 || <tt>F7 /2</tt> || <tt>11111111 11010mmm</tt> || 2 || 1
|}
----
{{Anchor|OR}}
{{Anchor|OR}}
=== OR ===
=== OR ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| OR AL, imm || <tt>0C ii</tt> || <tt>00001100 iiiiiiii</tt> || 2 || 1
|-
| OR AX, imm || <tt>0D ii ii</tt> || <tt>00001101 iiiiiiii iiiiiiii</tt> || 3 || 1
|-
| OR mem8, imm8 || <tt>80 /6 ii</tt> || <tt>10000000 oo001mmm iiiiiiii</tt> || 3+ || 3
|-
| OR mem16, imm16 || <tt>81 /6 ii ii</tt> || <tt>10000001 oo001mmm iiiiiiii iiiiiiii</tt> || 4+ || 3
|-
| OR mem16, simm8 || <tt>83 /6 ii</tt> || <tt>10000011 oo001mmm iiiiiiii</tt> || 3+ || 3
|-
| OR mem8, reg8 || <tt>08 /r</tt> || <tt>00001000 oorrrmmm</tt> || 2+ || 3
|-
| OR mem16, reg16 || <tt>09 /r</tt> || <tt>00001001 oorrrmmm</tt> || 2+ || 3
|-
| OR reg8, imm8 || <tt>80 /6 ii</tt> || <tt>10000000 11001mmm iiiiiiii</tt> || 3 || 1
|-
| OR reg16, imm16 || <tt>81 /6 ii ii</tt> || <tt>10000001 11001mmm iiiiiiii iiiiiiii</tt> || 4 || 1
|-
| OR reg16, simm8 || <tt>83 /6 ii</tt> || <tt>10000011 11001mmm iiiiiiii</tt> || 3 || 1
|-
| OR reg8, mem8 || <tt>0A /r</tt> || <tt>00001010 oorrrmmm</tt> || 2+ || 2
|-
| OR reg16, mem16 || <tt>0B /r</tt> || <tt>00001011 oorrrmmm</tt> || 2+ || 2
|-
| OR reg8, reg8 || <tt>08 /r</tt> || <tt>000010.0 11rrrmmm</tt> || 2 || 1
|-
| OR reg16, reg16 || <tt>09 /r</tt> || <tt>000010.1 11rrrmmm</tt> || 2 || 1
|}
----
{{Anchor|OUT}}
{{Anchor|OUT}}
=== OUT ===
=== OUT ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| OUT AL, DX || <tt>EE</tt> || <tt>11101110</tt> || 1 || 6
|-
| OUT AX, DX || <tt>EF</tt> || <tt>11101111</tt> || 1 || 6
|-
| OUT AL, imm8 || <tt>E6 ii</tt> || <tt>11100110 iiiiiiii</tt> || 2 || 6
|-
| OUT AX, imm8 || <tt>E7 ii</tt> || <tt>11100111 iiiiiiii</tt> || 2 || 6
|}
----
{{Anchor|OUTSB}}
{{Anchor|OUTSB}}
=== OUTSB ===
{{Anchor|OUTSW}}
=== OUTSB/OUTSW ===


{{Anchor|OUTSW}}
{| class="wikitable sortable"
=== OUTSW ===
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| OUTSB || <tt>6E</tt> || <tt>01101110</tt> || 1 || 6
|-
| OUTSW || <tt>6F</tt> || <tt>01101111</tt> || 1 || 6
|}


----
{{Anchor|POLL}}
{{Anchor|POLL}}
=== POLL ===
=== POLL ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| POLL || <tt>6E</tt> || <tt>01101110</tt> || 1 || 9<ref>On the WonderSwan implementation, POLLB is always held low; on other implementations, POLL will wait for POLLB to be held low in 9-cycle intervals.</ref>
|}
----
{{Anchor|POP}}
{{Anchor|POP}}
=== POP ===
=== POP ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| POP mem16 || <tt>8F /0</tt> || <tt>10001111 oo000mmm</tt> || 2+ || 3
|-
| POP reg16 || <tt>5x</tt> || <tt>01011xxx</tt> || 1 || 1
|-
| POP reg16 || <tt>8F /0</tt> || <tt>10001111 11000mmm</tt> || 2 || 1
|-
| POP sreg16 || <tt>xx</tt> || <tt>000xx111</tt> || 1 || 3
|}
----
{{Anchor|POPA}}
{{Anchor|POPA}}
=== POPA ===
=== POPA ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| POPA || <tt>61</tt> || <tt>01100001</tt> || 1 || 8
|}
----
{{Anchor|POPF}}
{{Anchor|POPF}}
=== POPF ===
=== POPF ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| POPF || <tt>9D</tt> || <tt>10011101</tt> || 1 || 3
|}
----
{{Anchor|PUSH}}
{{Anchor|PUSH}}
=== PUSH ===
=== PUSH ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| PUSH imm8 || <tt>6A ii</tt> || <tt>01101010 iiiiiiii</tt> || 2 ||  1
|-
| PUSH imm16 || <tt>68 ii ii</tt> || <tt>01101000 iiiiiiii iiiiiiii</tt> || 3 || 1
|-
| PUSH mem16 || <tt>FF /6</tt> || <tt>11111111 oo110mmm</tt> || 2+ || 2
|-
| PUSH reg16 || <tt>5x</tt> || <tt>01010xxx</tt> || 1 || 1
|-
| PUSH reg16 || <tt>FF /6</tt> || <tt>11111111 11110mmm</tt> || 2 || 1
|-
| PUSH sreg16 || <tt>xx</tt> || <tt>000xx110</tt> || 1 || 2
|}
----
{{Anchor|PUSHA}}
{{Anchor|PUSHA}}
=== PUSHA ===
=== PUSHA ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| PUSHA || <tt>60</tt> || <tt>01100000</tt> || 1 || 9
|}
----
{{Anchor|PUSHF}}
{{Anchor|PUSHF}}
=== PUSHF ===
=== PUSHF ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| PUSHF || <tt>9C</tt> || <tt>10011100</tt> || 1 || 2
|}
----
{{Anchor|RCL}}
{{Anchor|RCL}}
=== RCL ===
=== RCL ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| RCL mem8, 1 || <tt>D0 /2</tt> || <tt>11010000 oo010rm</tt> || 2+ || 3
|-
| RCL mem8, CL || <tt>D2 /2</tt> || <tt>11010010 oo010rm</tt> || 2+ || 5
|-
| RCL mem8, imm8 || <tt>C0 /2 ii</tt> || <tt>11000000 oo010mmm iiiiiiii</tt> || 3+ || 5
|-
| RCL mem16, 1 || <tt>D1 /2</tt> || <tt>11010001 oo010rm</tt> || 2+ || 3
|-
| RCL mem16, CL || <tt>D3 /2</tt> || <tt>11010011 oo010rm</tt> || 2+ || 5
|-
| RCL mem16, imm8 || <tt>C1 /2 ii</tt> || <tt>11000001 oo010mmm iiiiiiii</tt> || 3+ || 5
|-
| RCL reg8, 1 || <tt>D0 /2</tt> || <tt>11010000 11010rm</tt> || 2 || 1
|-
| RCL reg8, CL || <tt>D2 /2</tt> || <tt>11010010 11010rm</tt> || 2 || 3
|-
| RCL reg8, imm8 || <tt>C0 /2 ii</tt> || <tt>11000000 11010mmm iiiiiiii</tt> || 3 || 3
|-
| RCL reg16, 1 || <tt>D1 /2</tt> || <tt>11010001 11010rm</tt> || 2 || 1
|-
| RCL reg16, CL || <tt>D3 /2</tt> || <tt>11010011 11010rm</tt> || 2 || 3
|-
| RCL reg16, imm8 || <tt>C1 /2 ii</tt> || <tt>11000001 11010mmm iiiiiiii</tt> || 3 || 3
|}
----
{{Anchor|RCR}}
{{Anchor|RCR}}
=== RCR ===
=== RCR ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| RCR mem8, 1 || <tt>D0 /3</tt> || <tt>11010000 oo011rm</tt> || 2+ || 3
|-
| RCR mem8, CL || <tt>D2 /3</tt> || <tt>11010010 oo011rm</tt> || 2+ || 5
|-
| RCR mem8, imm8 || <tt>C0 /3 ii</tt> || <tt>11000000 oo011mmm iiiiiiii</tt> || 3+ || 5
|-
| RCR mem16, 1 || <tt>D1 /3</tt> || <tt>11010001 oo011rm</tt> || 2+ || 3
|-
| RCR mem16, CL || <tt>D3 /3</tt> || <tt>11010011 oo011rm</tt> || 2+ || 5
|-
| RCR mem16, imm8 || <tt>C1 /3 ii</tt> || <tt>11000001 oo011mmm iiiiiiii</tt> || 3+ || 5
|-
| RCR reg8, 1 || <tt>D0 /3</tt> || <tt>11010000 11011rm</tt> || 2 || 1
|-
| RCR reg8, CL || <tt>D2 /3</tt> || <tt>11010010 11011rm</tt> || 2 || 3
|-
| RCR reg8, imm8 || <tt>C0 /3 ii</tt> || <tt>11000000 11011mmm iiiiiiii</tt> || 3 || 3
|-
| RCR reg16, 1 || <tt>D1 /3</tt> || <tt>11010001 11011rm</tt> || 2 || 1
|-
| RCR reg16, CL || <tt>D3 /3</tt> || <tt>11010011 11011rm</tt> || 2 || 3
|-
| RCR reg16, imm8 || <tt>C1 /3 ii</tt> || <tt>11000001 11011mmm iiiiiiii</tt> || 3 || 3
|}
----
{{Anchor|REP}}
{{Anchor|REP}}
=== REP/REPE/REPZ ===
=== REP/REPE/REPZ ===


----
{{Anchor|REPNE}}
{{Anchor|REPNE}}
=== REPNE/REPNZ ===
=== REPNE/REPNZ ===


----
{{Anchor|RET}}
{{Anchor|RET}}
=== RET ===
=== RET ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| RET || <tt>C3</tt> || <tt>11000011</tt> || 1 || 6
|-
| RET imm16 || <tt>C2 ii ii</tt> || <tt>11000010 iiiiiiii iiiiiiii</tt> || 1 || 6
|}
----
{{Anchor|RETF}}
{{Anchor|RETF}}
=== RETF ===
=== RETF ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| RETF || <tt>CB</tt> || <tt>11001011</tt> || 1 || 8
|-
| RETF imm16 || <tt>CA ii ii</tt> || <tt>11001010 iiiiiiii iiiiiiii</tt> || 1 || 9
|}
----
{{Anchor|ROL}}
{{Anchor|ROL}}
=== ROL ===
=== ROL ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| ROL mem8, 1 || <tt>D0 /0</tt> || <tt>11010000 oo000rm</tt> || 2+ || 3
|-
| ROL mem8, CL || <tt>D2 /0</tt> || <tt>11010010 oo000rm</tt> || 2+ || 5
|-
| ROL mem8, imm8 || <tt>C0 /0 ii</tt> || <tt>11000000 oo000mmm iiiiiiii</tt> || 3+ || 5
|-
| ROL mem16, 1 || <tt>D1 /0</tt> || <tt>11010001 oo000rm</tt> || 2+ || 3
|-
| ROL mem16, CL || <tt>D3 /0</tt> || <tt>11010011 oo000rm</tt> || 2+ || 5
|-
| ROL mem16, imm8 || <tt>C1 /0 ii</tt> || <tt>11000001 oo000mmm iiiiiiii</tt> || 3+ || 5
|-
| ROL reg8, 1 || <tt>D0 /0</tt> || <tt>11010000 11000rm</tt> || 2 || 1
|-
| ROL reg8, CL || <tt>D2 /0</tt> || <tt>11010010 11000rm</tt> || 2 || 3
|-
| ROL reg8, imm8 || <tt>C0 /0 ii</tt> || <tt>11000000 11000mmm iiiiiiii</tt> || 3 || 3
|-
| ROL reg16, 1 || <tt>D1 /0</tt> || <tt>11010001 11000rm</tt> || 2 || 1
|-
| ROL reg16, CL || <tt>D3 /0</tt> || <tt>11010011 11000rm</tt> || 2 || 3
|-
| ROL reg16, imm8 || <tt>C1 /0 ii</tt> || <tt>11000001 11000mmm iiiiiiii</tt> || 3 || 3
|}
----
{{Anchor|ROR}}
{{Anchor|ROR}}
=== ROR ===
=== ROR ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| ROR mem8, 1 || <tt>D0 /1</tt> || <tt>11010000 oo001rm</tt> || 2+ || 3
|-
| ROR mem8, CL || <tt>D2 /1</tt> || <tt>11010010 oo001rm</tt> || 2+ || 5
|-
| ROR mem8, imm8 || <tt>C0 /1 ii</tt> || <tt>11000000 oo001mmm iiiiiiii</tt> || 3+ || 5
|-
| ROR mem16, 1 || <tt>D1 /1</tt> || <tt>11010001 oo001rm</tt> || 2+ || 3
|-
| ROR mem16, CL || <tt>D3 /1</tt> || <tt>11010011 oo001rm</tt> || 2+ || 5
|-
| ROR mem16, imm8 || <tt>C1 /1 ii</tt> || <tt>11000001 oo001mmm iiiiiiii</tt> || 3+ || 5
|-
| ROR reg8, 1 || <tt>D0 /1</tt> || <tt>11010000 11001rm</tt> || 2 || 1
|-
| ROR reg8, CL || <tt>D2 /1</tt> || <tt>11010010 11001rm</tt> || 2 || 3
|-
| ROR reg8, imm8 || <tt>C0 /1 ii</tt> || <tt>11000000 11001mmm iiiiiiii</tt> || 3 || 3
|-
| ROR reg16, 1 || <tt>D1 /1</tt> || <tt>11010001 11001rm</tt> || 2 || 1
|-
| ROR reg16, CL || <tt>D3 /1</tt> || <tt>11010011 11001rm</tt> || 2 || 3
|-
| ROR reg16, imm8 || <tt>C1 /1 ii</tt> || <tt>11000001 11001mmm iiiiiiii</tt> || 3 || 3
|}
----
{{Anchor|SAHF}}
{{Anchor|SAHF}}
=== SAHF ===
=== SAHF ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| SAHF || <tt>9E</tt> || <tt>10011110</tt> || 1 || 4
|}
----
{{Anchor|SAR}}
{{Anchor|SAR}}
=== SAR ===
=== SAR ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| SAR mem8, 1 || <tt>D0 /7</tt> || <tt>11010000 oo111rm</tt> || 2+ || 3
|-
| SAR mem8, CL || <tt>D2 /7</tt> || <tt>11010010 oo111rm</tt> || 2+ || 5
|-
| SAR mem8, imm8 || <tt>C0 /7 ii</tt> || <tt>11000000 oo111mmm iiiiiiii</tt> || 3+ || 5
|-
| SAR mem16, 1 || <tt>D1 /7</tt> || <tt>11010001 oo111rm</tt> || 2+ || 3
|-
| SAR mem16, CL || <tt>D3 /7</tt> || <tt>11010011 oo111rm</tt> || 2+ || 5
|-
| SAR mem16, imm8 || <tt>C1 /7 ii</tt> || <tt>11000001 oo111mmm iiiiiiii</tt> || 3+ || 5
|-
| SAR reg8, 1 || <tt>D0 /7</tt> || <tt>11010000 11111rm</tt> || 2 || 1
|-
| SAR reg8, CL || <tt>D2 /7</tt> || <tt>11010010 11111rm</tt> || 2 || 3
|-
| SAR reg8, imm8 || <tt>C0 /7 ii</tt> || <tt>11000000 11111mmm iiiiiiii</tt> || 3 || 3
|-
| SAR reg16, 1 || <tt>D1 /7</tt> || <tt>11010001 11111rm</tt> || 2 || 1
|-
| SAR reg16, CL || <tt>D3 /7</tt> || <tt>11010011 11111rm</tt> || 2 || 3
|-
| SAR reg16, imm8 || <tt>C1 /7 ii</tt> || <tt>11000001 11111mmm iiiiiiii</tt> || 3 || 3
|}
----
{{Anchor|SBB}}
{{Anchor|SBB}}
=== SBB ===
=== SBB ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| SBB AL, imm || <tt>1C ii</tt> || <tt>00011100 iiiiiiii</tt> || 2 || 1
|-
| SBB AX, imm || <tt>1D ii ii</tt> || <tt>00011101 iiiiiiii iiiiiiii</tt> || 3 || 1
|-
| SBB mem8, imm8 || <tt>80 /3 ii</tt> || <tt>10000000 oo011mmm iiiiiiii</tt> || 3+ || 3
|-
| SBB mem16, imm16 || <tt>81 /3 ii ii</tt> || <tt>10000001 oo011mmm iiiiiiii iiiiiiii</tt> || 4+ || 3
|-
| SBB mem16, simm8 || <tt>83 /3 ii</tt> || <tt>10000011 oo011mmm iiiiiiii</tt> || 3+ || 3
|-
| SBB mem8, reg8 || <tt>18 /r</tt> || <tt>00011000 oorrrmmm</tt> || 2+ || 3
|-
| SBB mem16, reg16 || <tt>19 /r</tt> || <tt>00011001 oorrrmmm</tt> || 2+ || 3
|-
| SBB reg8, imm8 || <tt>80 /3 ii</tt> || <tt>10000000 11011mmm iiiiiiii</tt> || 3 || 1
|-
| SBB reg16, imm16 || <tt>81 /3 ii ii</tt> || <tt>10000001 11011mmm iiiiiiii iiiiiiii</tt> || 4 || 1
|-
| SBB reg16, simm8 || <tt>83 /3 ii</tt> || <tt>10000011 11011mmm iiiiiiii</tt> || 3 || 1
|-
| SBB reg8, mem8 || <tt>1A /r</tt> || <tt>00011010 oorrrmmm</tt> || 2+ || 2
|-
| SBB reg16, mem16 || <tt>1B /r</tt> || <tt>00011011 oorrrmmm</tt> || 2+ || 2
|-
| SBB reg8, reg8 || <tt>18 /r</tt> || <tt>000110.0 11rrrmmm</tt> || 2 || 1
|-
| SBB reg16, reg16 || <tt>19 /r</tt> || <tt>000110.1 11rrrmmm</tt> || 2 || 1
|}
----
{{Anchor|SCASB}}
{{Anchor|SCASB}}
=== SCASB ===
{{Anchor|SCASW}}
=== SCASB/SCASW ===


{{Anchor|SCASW}}
{| class="wikitable sortable"
=== SCASW ===
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| SCASB || <tt>AE</tt> || <tt>10101110</tt> || 1 || 4
|-
| SCASW || <tt>AF</tt> || <tt>10101111</tt> || 1 || 4
|}


----
{{Anchor|SHL}}
{{Anchor|SHL}}
=== SHL ===
=== SHL ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| SHL mem8, 1 || <tt>D0 /4</tt> || <tt>11010000 oo100rm</tt> || 2+ || 3
|-
| SHL mem8, CL || <tt>D2 /4</tt> || <tt>11010010 oo100rm</tt> || 2+ || 5
|-
| SHL mem8, imm8 || <tt>C0 /4 ii</tt> || <tt>11000000 oo100mmm iiiiiiii</tt> || 3+ || 5
|-
| SHL mem16, 1 || <tt>D1 /4</tt> || <tt>11010001 oo100rm</tt> || 2+ || 3
|-
| SHL mem16, CL || <tt>D3 /4</tt> || <tt>11010011 oo100rm</tt> || 2+ || 5
|-
| SHL mem16, imm8 || <tt>C1 /4 ii</tt> || <tt>11000001 oo100mmm iiiiiiii</tt> || 3+ || 5
|-
| SHL reg8, 1 || <tt>D0 /4</tt> || <tt>11010000 11100rm</tt> || 2 || 1
|-
| SHL reg8, CL || <tt>D2 /4</tt> || <tt>11010010 11100rm</tt> || 2 || 3
|-
| SHL reg8, imm8 || <tt>C0 /4 ii</tt> || <tt>11000000 11100mmm iiiiiiii</tt> || 3 || 3
|-
| SHL reg16, 1 || <tt>D1 /4</tt> || <tt>11010001 11100rm</tt> || 2 || 1
|-
| SHL reg16, CL || <tt>D3 /4</tt> || <tt>11010011 11100rm</tt> || 2 || 3
|-
| SHL reg16, imm8 || <tt>C1 /4 ii</tt> || <tt>11000001 11100mmm iiiiiiii</tt> || 3 || 3
|}
----
{{Anchor|SHR}}
{{Anchor|SHR}}
=== SHR ===
=== SHR ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| SHR mem8, 1 || <tt>D0 /5</tt> || <tt>11010000 oo101rm</tt> || 2+ || 3
|-
| SHR mem8, CL || <tt>D2 /5</tt> || <tt>11010010 oo101rm</tt> || 2+ || 5
|-
| SHR mem8, imm8 || <tt>C0 /5 ii</tt> || <tt>11000000 oo101mmm iiiiiiii</tt> || 3+ || 5
|-
| SHR mem16, 1 || <tt>D1 /5</tt> || <tt>11010001 oo101rm</tt> || 2+ || 3
|-
| SHR mem16, CL || <tt>D3 /5</tt> || <tt>11010011 oo101rm</tt> || 2+ || 5
|-
| SHR mem16, imm8 || <tt>C1 /5 ii</tt> || <tt>11000001 oo101mmm iiiiiiii</tt> || 3+ || 5
|-
| SHR reg8, 1 || <tt>D0 /5</tt> || <tt>11010000 11101rm</tt> || 2 || 1
|-
| SHR reg8, CL || <tt>D2 /5</tt> || <tt>11010010 11101rm</tt> || 2 || 3
|-
| SHR reg8, imm8 || <tt>C0 /5 ii</tt> || <tt>11000000 11101mmm iiiiiiii</tt> || 3 || 3
|-
| SHR reg16, 1 || <tt>D1 /5</tt> || <tt>11010001 11101rm</tt> || 2 || 1
|-
| SHR reg16, CL || <tt>D3 /5</tt> || <tt>11010011 11101rm</tt> || 2 || 3
|-
| SHR reg16, imm8 || <tt>C1 /5 ii</tt> || <tt>11000001 11101mmm iiiiiiii</tt> || 3 || 3
|}
----
{{Anchor|SS}}
{{Anchor|SS}}
=== SS ===
=== SS ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| SS || <tt>36</tt> || <tt>00110110</tt> || 1 || 1
|}
----
{{Anchor|STC}}
{{Anchor|STC}}
=== STC ===
=== STC ===


{| class="wikitable"
! Flag !! New value
|-
| [[NEC_V30MZ_flags#CF|CF - Carry]] || 1
|}
{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| STC || <tt>F9</tt> || <tt>11111001</tt> || 1 || 4
|}
----
{{Anchor|STD}}
{{Anchor|STD}}
=== STD ===
=== STD ===


{| class="wikitable"
! Flag !! New value
|-
| [[NEC_V30MZ_flags#DF|DF - Direction]] || 1
|}
{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| STD || <tt>FD</tt> || <tt>11111101</tt> || 1 || 4
|}
----
{{Anchor|STI}}
{{Anchor|STI}}
=== STI ===
=== STI ===


{| class="wikitable"
! Flag !! New value
|-
| [[NEC_V30MZ_flags#IF|IF - Interrupt]] || 1
|}
{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| STI || <tt>FB</tt> || <tt>11111011</tt> || 1 || 4
|}
----
{{Anchor|STOSB}}
{{Anchor|STOSB}}
=== STOSB ===
{{Anchor|STOSW}}
=== STOSB/STOSW ===


{{Anchor|STOSW}}
{| class="wikitable sortable"
=== STOSW ===
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| STOSB || <tt>AA</tt> || <tt>10101010</tt> || 1 || 3
|-
| STOSW || <tt>AB</tt> || <tt>10101011</tt> || 1 || 3
|}


----
{{Anchor|SUB}}
{{Anchor|SUB}}
=== SUB ===
=== SUB ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| SUB AL, imm || <tt>28 ii</tt> || <tt>00101100 iiiiiiii</tt> || 2 || 1
|-
| SUB AX, imm || <tt>29 ii ii</tt> || <tt>00101101 iiiiiiii iiiiiiii</tt> || 3 || 1
|-
| SUB mem8, imm8 || <tt>80 /5 ii</tt> || <tt>10000000 oo101mmm iiiiiiii</tt> || 3+ || 3
|-
| SUB mem16, imm16 || <tt>81 /5 ii ii</tt> || <tt>10000001 oo101mmm iiiiiiii iiiiiiii</tt> || 4+ || 3
|-
| SUB mem16, simm8 || <tt>83 /5 ii</tt> || <tt>10000011 oo101mmm iiiiiiii</tt> || 3+ || 3
|-
| SUB mem8, reg8 || <tt>28 /r</tt> || <tt>00101000 oorrrmmm</tt> || 2+ || 3
|-
| SUB mem16, reg16 || <tt>29 /r</tt> || <tt>00101001 oorrrmmm</tt> || 2+ || 3
|-
| SUB reg8, imm8 || <tt>80 /5 ii</tt> || <tt>10000000 11101mmm iiiiiiii</tt> || 3 || 1
|-
| SUB reg16, imm16 || <tt>81 /5 ii ii</tt> || <tt>10000001 11101mmm iiiiiiii iiiiiiii</tt> || 4 || 1
|-
| SUB reg16, simm8 || <tt>83 /5 ii</tt> || <tt>10000011 11101mmm iiiiiiii</tt> || 3 || 1
|-
| SUB reg8, mem8 || <tt>2A /r</tt> || <tt>00101010 oorrrmmm</tt> || 2+ || 2
|-
| SUB reg16, mem16 || <tt>2B /r</tt> || <tt>00101011 oorrrmmm</tt> || 2+ || 2
|-
| SUB reg8, reg8 || <tt>28 /r</tt> || <tt>001010.0 11rrrmmm</tt> || 2 || 1
|-
| SUB reg16, reg16 || <tt>29 /r</tt> || <tt>001010.1 11rrrmmm</tt> || 2 || 1
|}
----
{{Anchor|TEST}}
{{Anchor|TEST}}
=== TEST ===
=== TEST ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| TEST AL, imm || <tt>A8 ii</tt> || <tt>10101000 iiiiiiii</tt> || 2 || 1
|-
| TEST AX, imm || <tt>A9 ii ii</tt> || <tt>10101001 iiiiiiii iiiiiiii</tt> || 3 || 1
|-
| TEST mem8, imm8 || <tt>F6 /0 ii</tt> || <tt>11110110 oo000mmm iiiiiiii</tt> || 3+ || 2
|-
| TEST mem16, imm16 || <tt>F7 /0 ii ii</tt> || <tt>11110111 oo000mmm iiiiiiii iiiiiiii</tt> || 4+ || 2
|-
| TEST mem8, reg8<br/>TEST reg8, mem8 || <tt>84 /r</tt> || <tt>10000100 oorrrmmm</tt> || 2+ || 2
|-
| TEST mem16, reg16<br/>TEST reg16, mem16 || <tt>85 /r</tt> || <tt>10000101 oorrrmmm</tt> || 2+ || 2
|-
| TEST reg8, imm8 || <tt>F6 /0 ii</tt> || <tt>11110110 11000mmm iiiiiiii</tt> || 3 || 1
|-
| TEST reg16, imm16 || <tt>F7 /0 ii ii</tt> || <tt>11110111 11000mmm iiiiiiii iiiiiiii</tt> || 4 || 1
|-
| TEST reg8, reg8 || <tt>84 /r</tt> || <tt>10000100 11rrrmmm</tt> || 2 || 1
|-
| TEST reg16, reg16 || <tt>85 /r</tt> || <tt>10000101 11rrrmmm</tt> || 2 || 1
|}
----
{{Anchor|XCHG}}
{{Anchor|XCHG}}
=== XCHG ===
=== XCHG ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| XCHG AX, reg16<br/>XCHG reg16, AX || <tt>9x</tt> || <tt>10010rrr</tt> || 1 || 3
|-
| XCHG mem8, reg8<br/>XCHG reg8, mem8 || <tt>86 /r</tt> || <tt>10000110 oorrrmmm</tt> || 2+ || 5
|-
| XCHG mem16, reg16<br/>XCHG reg16, mem16 || <tt>87 /r</tt> || <tt>10000111 oorrrmmm</tt> || 2+ || 5
|-
| XCHG reg8, reg8 || <tt>86 /r</tt> || <tt>10000110 11rrrmmm</tt> || 2+ || 3
|-
| XCHG reg16, reg16 || <tt>87 /r</tt> || <tt>10000111 11rrrmmm</tt> || 2+ || 3
|}
----
{{Anchor|XLAT}}
{{Anchor|XLAT}}
=== XLAT ===
=== XLAT ===


{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| XLAT || <tt>D7</tt> || <tt>11010111</tt> || 1 || 5
|}
----
{{Anchor|XOR}}
{{Anchor|XOR}}
=== XOR ===
=== XOR ===
{| class="wikitable sortable"
! Instruction !! Opcode (hex) !! Opcode (bin) !! Bytes !! Cycles
|-
| XOR AL, imm || <tt>34 ii</tt> || <tt>00110100 iiiiiiii</tt> || 2 || 1
|-
| XOR AX, imm || <tt>35 ii ii</tt> || <tt>00110101 iiiiiiii iiiiiiii</tt> || 3 || 1
|-
| XOR mem8, imm8 || <tt>80 /6 ii</tt> || <tt>10000000 oo110mmm iiiiiiii</tt> || 3+ || 3
|-
| XOR mem16, imm16 || <tt>81 /6 ii ii</tt> || <tt>10000001 oo110mmm iiiiiiii iiiiiiii</tt> || 4+ || 3
|-
| XOR mem16, simm8 || <tt>83 /6 ii</tt> || <tt>10000011 oo110mmm iiiiiiii</tt> || 3+ || 3
|-
| XOR mem8, reg8 || <tt>30 /r</tt> || <tt>00110000 oorrrmmm</tt> || 2+ || 3
|-
| XOR mem16, reg16 || <tt>31 /r</tt> || <tt>00110001 oorrrmmm</tt> || 2+ || 3
|-
| XOR reg8, imm8 || <tt>80 /6 ii</tt> || <tt>10000000 11110mmm iiiiiiii</tt> || 3 || 1
|-
| XOR reg16, imm16 || <tt>81 /6 ii ii</tt> || <tt>10000001 11110mmm iiiiiiii iiiiiiii</tt> || 4 || 1
|-
| XOR reg16, simm8 || <tt>83 /6 ii</tt> || <tt>10000011 11110mmm iiiiiiii</tt> || 3 || 1
|-
| XOR reg8, mem8 || <tt>32 /r</tt> || <tt>00110010 oorrrmmm</tt> || 2+ || 2
|-
| XOR reg16, mem16 || <tt>33 /r</tt> || <tt>00110011 oorrrmmm</tt> || 2+ || 2
|-
| XOR reg8, reg8 || <tt>30 /r</tt> || <tt>001100.0 11rrrmmm</tt> || 2 || 1
|-
| XOR reg16, reg16 || <tt>31 /r</tt> || <tt>001100.1 11rrrmmm</tt> || 2 || 1
|}
== Notes ==
<references />

Latest revision as of 10:12, 31 December 2024


Note that this page is a work in progress.

Official V30MZ (80186) Instructions
AAA AAD AAM AAS ADC ADD AND BOUND CALL CBW CLC
CLD CLI CMC CMP CMPSB CMPSW CS CWD DAA DAS DEC
DIV DS ENTER ES HLT IDIV IMUL IN INC INSB INSW
INT INTO IRET JA JBE JC JCXZ JG JGE JL JLE
JMP JNC JNO JNP JNS JNZ JO JP JS JZ LAHF
LDS LEA LEAVE LES LOCK LODSB LODSW LOOP LOOPE LOOPNE MOV
MOVSB MOVSW MUL NEG NOP NOT OR OUT OUTSB OUTSW POLL
POP POPA POPF PUSH PUSHA PUSHF RCL RCR REP REPNE RET
RETF ROL ROR SAHF SAR SBB SCASB SCASW SHL SHR SS
STC STD STI STOSB STOSW SUB TEST XCHG XLAT XOR
Intel <-> NEC mnemonic translation table
Intel NEC
AAA ADJBA
AAD CVTDB
AAM CVTBD
AAS ADJBS
ADC ADDC
ADD ADD
AND AND
BOUND CHKIND
CALL CALL
CBW CVTBW
CLC CLR1 CY
CLD CLR1 DIR
CLI DI
CMC NOT1 CY
CMP CMP
CMPSB CMPBKB
CMPSW CMPBKW
CS PS
CWD CVTWL
DAA ADJ4A
DAS ADJ4S
DEC DEC
DIV DIVU
DS DS0
ENTER PREPARE
ES DS1
HLT HALT
IDIV DIV
IMUL MUL
IN IN
INC INC
INSB INMB
INSW INMW
INT BRK
INTO BRKV
IRET RETI
JA BH
JBE BNH
JC/JB BC/BL
JCXZ BCWZ
JG BGT
JGE BGE
JL BLT
JLE BLE
JMP BR
JNC/JAE BNC/BNL
JNO BNV
JNP BPO
JNS BP
JNZ/JNE BNZ/BNE
JO BV
JP BPE
JS BN
JZ/JE BZ/BE
LAHF MOV
LDS MOV
LEA LDEA
LEAVE DISPOSE
LES MOV
LOCK BUSLOCK
LODSB LDMB
LODSW LDMW
LOOP DBNZ
LOOPE DBNZE
LOOPNE DBNZNE
MOV MOV
MOVSB MOVBKB
MOVSW MOVBKW
MUL MULU
NEG NEG
NOP NOP
NOT NOT
OR OR
OUT OUT
OUTSB OUTM
OUTSW OUTM
POLL POLL
POP POP
POPA POP
POPF POP
PUSH PUSH
PUSHA PUSH
PUSHF PUSH
RCL ROLC
RCR RORC
REP/REPE/REPZ REP/REPE/REPZ
REPNE/REPNZ REPNE/REPNZ
RET RET
RETF RET
ROL ROL
ROR ROR
SAHF MOV
SAR SHRA
SBB SUBC
SCASB CMPMB
SCASW CMPMW
SHL SHL
SHR SHR
SS SS
STC SET1 CY
STD SET1 DIR
STI EI
STOSB STMB
STOSW STMW
SUB SUB
TEST TEST
XCHG XCH
XLAT TRANS
XOR XOR

Official instructions by type

Type Instructions
Memory MOV XCHG XLAT LEA LDS LES IN OUT
Ports IN OUT INSB OUTSB INSW OUTSW
Arithmetic ADD SUB ADC SBB INC DEC MUL DIV IMUL IDIV CMP NEG
Numeric CBW CWD AAA AAS AAM AAD DAA DAS
Shift ROL ROR RCL RCR SHL SHR SAR
Bitwise AND OR XOR NOT TEST
Branch JC JNC JZ JNZ JBE JA JO JNO JP JNP JS JNS JL JGE JLE JG
Jump JMP CALL RET RETF
Loop LOOP LOOPE LOOPNE
Interrupt INT IRET INTO HLT BOUND
Stack PUSH POP PUSHA POPA PUSHF POPF
Flags CLC STC CLD STD CLI STI CMC LAHF SAHF
Prefix CS DS ES SS
String REP REPE REPNE MOVSB MOVSW LODSB STOSB LODSW STOSW CMPSB SCASB CMPSW SCASW
Other NOP ENTER LEAVE LOCK POLL

Instruction encoding

ModR/M byte

The ModR/M byte is used in most addressing modes which reference a memory location. This byte consists of three bitfield values:

  • oo - Mode;
  • rrr - Two possible functions:
    • Register (for addressing modes which require both a register and a register/memory operand),
    • Opcode extension (for some opcodes' addressing modes which do not have such a requirement);
  • mmm - Register/Memory.

The Mode and Register/Memory bitfields can refer to a memory location or to a register, as shown in the table below. In some addressing modes, the Register field also refers to a register; it is always interpreted as if Mode was equal to 11.

R/M \ Mode 00 01 10 11 (byte) 11 (word)
000 DS:[BX + SI] DS:[BX + SI + disp8] DS:[BX + SI + disp16] AL AX
001 DS:[BX + DI] DS:[BX + DI + disp8] DS:[BX + DI + disp16] CL CX
010 SS:[BP + SI] SS:[BP + SI + disp8] SS:[BP + SI + disp16] DL DX
011 SS:[BP + DI] SS:[BP + DI + disp8] SS:[BP + DI + disp16] BL BX
100 DS:[SI] DS:[SI + disp8] DS:[SI + disp16] AH SP
101 DS:[DI] DS:[DI + disp8] DS:[DI + disp16] CH BP
110 DS:[disp16] SS:[BP + disp8] SS:[BP + disp16] DH SI
111 DS:[BX] DS:[BX + disp8] DS:[BX + disp16] BH DI

Displacements are either 8-bit (disp8) or 16-bit (disp16) signed values and they always immediately follow the ModR/M byte. Note that (oo = 00, mmm = 110) is a special case, in which the disp16 value is used directly as a near pointer.

The instruction encoding lists below refer to this byte as oorrrmmm (binary), /r (hexadecimal) or /0 (hexademical, rrr used as function 0).

Official instructions

AAA

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
AAA 37 00110111 1 9

AAD

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
AAD imm8 B5 ii 11010100 iiiiiiii 2 6

AAM

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
AAM imm8 B4 ii 11010100 iiiiiiii 2 17

AAS

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
AAS 3F 00111111 1 9

ADC

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
ADC AL, imm 14 ii 00010100 iiiiiiii 2 1
ADC AX, imm 15 ii ii 00010101 iiiiiiii iiiiiiii 3 1
ADC mem8, imm8 80 /2 ii 10000000 oo010mmm iiiiiiii 3+ 3
ADC mem16, imm16 81 /2 ii ii 10000001 oo010mmm iiiiiiii iiiiiiii 4+ 3
ADC mem16, simm8 83 /2 ii 10000011 oo010mmm iiiiiiii 3+ 3
ADC mem8, reg8 10 /r 00010000 oorrrmmm 2+ 3
ADC mem16, reg16 11 /r 00010001 oorrrmmm 2+ 3
ADC reg8, imm8 80 /2 ii 10000000 11010mmm iiiiiiii 3 1
ADC reg16, imm16 81 /2 ii ii 10000001 11010mmm iiiiiiii iiiiiiii 4 1
ADC reg16, simm8 83 /2 ii 10000011 11010mmm iiiiiiii 3 1
ADC reg8, mem8 12 /r 00010010 oorrrmmm 2+ 2
ADC reg16, mem16 13 /r 00010011 oorrrmmm 2+ 2
ADC reg8, reg8 10 /r 000100.0 11rrrmmm 2 1
ADC reg16, reg16 11 /r 000100.1 11rrrmmm 2 1

ADD

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
ADD AL, imm 04 ii 00000100 iiiiiiii 2 1
ADD AX, imm 05 ii ii 00000101 iiiiiiii iiiiiiii 3 1
ADD mem8, imm8 80 /0 ii 10000000 oo000mmm iiiiiiii 3+ 3
ADD mem16, imm16 81 /0 ii ii 10000001 oo000mmm iiiiiiii iiiiiiii 4+ 3
ADD mem16, simm8 83 /0 ii 10000011 oo000mmm iiiiiiii 3+ 3
ADD mem8, reg8 00 /r 00000000 oorrrmmm 2+ 3
ADD mem16, reg16 01 /r 00000001 oorrrmmm 2+ 3
ADD reg8, imm8 80 /0 ii 10000000 11000mmm iiiiiiii 3 1
ADD reg16, imm16 81 /0 ii ii 10000001 11000mmm iiiiiiii iiiiiiii 4 1
ADD reg16, simm8 83 /0 ii 10000011 11000mmm iiiiiiii 3 1
ADD reg8, mem8 02 /r 00000010 oorrrmmm 2+ 2
ADD reg16, mem16 03 /r 00000011 oorrrmmm 2+ 2
ADD reg8, reg8 00 /r 000000.0 11rrrmmm 2 1
ADD reg16, reg16 01 /r 000000.1 11rrrmmm 2 1

AND

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
AND AL, imm 24 ii 00100100 iiiiiiii 2 1
AND AX, imm 25 ii ii 00100101 iiiiiiii iiiiiiii 3 1
AND mem8, imm8 80 /4 ii 10000000 oo100mmm iiiiiiii 3+ 3
AND mem16, imm16 81 /4 ii ii 10000001 oo100mmm iiiiiiii iiiiiiii 4+ 3
AND mem16, simm8 83 /4 ii 10000011 oo100mmm iiiiiiii 3+ 3
AND mem8, reg8 20 /r 00100000 oorrrmmm 2+ 3
AND mem16, reg16 21 /r 00100001 oorrrmmm 2+ 3
AND reg8, imm8 80 /4 ii 10000000 11100mmm iiiiiiii 3 1
AND reg16, imm16 81 /4 ii ii 10000001 11100mmm iiiiiiii iiiiiiii 4 1
AND reg16, simm8 83 /4 ii 10000011 11100mmm iiiiiiii 3 1
AND reg8, mem8 22 /r 00100010 oorrrmmm 2+ 2
AND reg16, mem16 23 /r 00100011 oorrrmmm 2+ 2
AND reg8, reg8 20 /r 001000.0 11rrrmmm 2 1
AND reg16, reg16 21 /r 001000.1 11rrrmmm 2 1

BOUND

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
BOUND reg16, mem16:16 62 /r 01100010 oorrrmmm 2+ 13 (20 if condition met)

CALL

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
CALL ptr16:16 CA oo oo ss ss 10011010 oooooooo oooooooo ssssssss ssssssss 5 10
CALL mem16 FF /2 11111111 oo010mmm 2+ 6
CALL mem16:16 FF /3 11111111 oo011mmm 2+ 12
CALL reg16 FF /2 11111111 11010mmm 2 5
CALL rel16 E8 ii ii 11101000 iiiiiiii iiiiiiii 3 5

CBW

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
CBW 98 10011000 1 1

CLC

Flag New value
CF - Carry 0
Instruction Opcode (hex) Opcode (bin) Bytes Cycles
CLC F8 11111000 1 4

CLD

Flag New value
DF - Direction 0
Instruction Opcode (hex) Opcode (bin) Bytes Cycles
CLD FC 11111100 1 4

CLI

Flag New value
IF - Interrupt 0
Instruction Opcode (hex) Opcode (bin) Bytes Cycles
CLI FA 11111010 1 4

CMC

Flag New value
CF - Carry !CF
Instruction Opcode (hex) Opcode (bin) Bytes Cycles
CMC F5 11110101 1 4

CMP

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
CMP AL, imm 3C ii 00111100 iiiiiiii 2 1
CMP AX, imm 3D ii ii 00111101 iiiiiiii iiiiiiii 3 1
CMP mem8, imm8 80 /7 ii 10000000 oo111mmm iiiiiiii 3+ 2
CMP mem16, imm16 81 /7 ii ii 10000001 oo111mmm iiiiiiii iiiiiiii 4+ 2
CMP mem16, simm8 83 /7 ii 10000011 oo111mmm iiiiiiii 3+ 2
CMP mem8, reg8 38 /r 00111000 oorrrmmm 2+ 2
CMP mem16, reg16 39 /r 00111001 oorrrmmm 2+ 2
CMP reg8, imm8 80 /7 ii 10000000 11111mmm iiiiiiii 3 1
CMP reg16, imm16 81 /7 ii ii 10000001 11111mmm iiiiiiii iiiiiiii 4 1
CMP reg16, simm8 83 /7 ii 10000011 11111mmm iiiiiiii 3 1
CMP reg8, mem8 3A /r 00111010 oorrrmmm 2+ 2
CMP reg16, mem16 3B /r 00111011 oorrrmmm 2+ 2
CMP reg8, reg8 38 /r 001110.0 11rrrmmm 2 1
CMP reg16, reg16 39 /r 001110.1 11rrrmmm 2 1

CMPSB/CMPSW

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
CMPSB A6 10100110 1 6
CMPSW A7 10100111 1 6

CS

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
CS 2E 00101110 1 1

CWD

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
CWD 99 10011001 1 1

DAA

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
DAA 27 00100111 1 10

DAS

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
DAS 2F 00101111 1 10

DEC

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
DEC mem8 FE /1 11111110 oo001mmm 2+ 3
DEC mem16 FF /1 11111111 oo001mmm 2+ 3
DEC reg8 FE /1 11111110 11001mmm 2+ 1
DEC reg16 4x 01001rrr 1 1

DIV

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
DIV mem8 F6 /6 11110110 oo110mmm 2+ 16
DIV mem16 F7 /6 11111111 oo110mmm 2+ 24
DIV reg8 F6 /6 11111110 11110mmm 2 15
DIV reg16 F7 /6 11111111 11110mmm 2 23

DS

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
DS 3E 00111110 1 1

ENTER

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
ENTER imm16, imm8 C8 ii ii jj 11001000 iiiiiiii iiiiiiii jjjjjjjj 3 8 (imm8 = 0)
14 (imm8 = 1)
15 + imm8 * 4 (imm8 >= 2)

ES

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
ES 26 00100110 1 1

HLT

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
HLT F4 11110100 1 9

IDIV

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
IDIV mem8 F6 /7 11110110 oo111mmm 2+ 18
IDIV mem16 F7 /7 11111111 oo111mmm 2+ 25
IDIV reg8 F6 /7 11111110 11111mmm 2 17
IDIV reg16 F7 /7 11111111 11111mmm 2 24

IMUL

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
IMUL mem8 F6 /5 11110110 oo101mmm 2+ 4
IMUL mem16 F7 /5 11111111 oo101mmm 2+ 4
IMUL reg8 F6 /5 11111110 11101mmm 2 3
IMUL reg16 F7 /5 11111111 11101mmm 2 3
IMUL reg16, mem16, imm16 69 /r ii ii 11111111 oorrrmmm iiiiiiii iiiiiiii 4 4
IMUL reg16, mem16, simm8 6B /r ii 11111111 oorrrmmm iiiiiiii 3 4
IMUL reg16, reg16, imm16 69 /r ii ii 11111111 11rrrmmm iiiiiiii iiiiiiii 4 3
IMUL reg16, reg16, simm8 6B /r ii 11111111 11rrrmmm iiiiiiii 3 3

IN

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
IN AL, DX EC 11101100 1 6
IN AX, DX ED 11101101 1 6
IN AL, imm8 E4 ii 11100100 iiiiiiii 2 6
IN AX, imm8 E5 ii 11100101 iiiiiiii 2 6

INC

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
INC mem8 FE /0 11111110 oo000mmm 2+ 3
INC mem16 FF /0 11111111 oo000mmm 2+ 3
INC reg8 FE /0 11111110 11000mmm 2+ 1
INC reg16 4x 01000rrr 1 1

INSB/INSW

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
INSB 6C 01101100 1 6
INSW 6D 01101101 1 6

INT

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
INT 3 CC 11001100 1 9
INT imm8 CD ii 11001101 iiiiiiii 2 10

INTO

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
INTO CE 11001110 1 6 (13 if OF = 1)

IRET

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
IRET CF 11001111 1 10

JA

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
JA rel8 77 ii 01110111 iiiiiiii 2 1 (4 if branch taken)

JBE

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
JA rel8 76 ii 01110110 iiiiiiii 2 1 (4 if branch taken)

JC/JB

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
JC rel8 72 ii 01110010 iiiiiiii 2 1 (4 if branch taken)

JCXZ

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
JCXZ rel8 E3 ii 11100011 iiiiiiii 2 1 (4 if branch taken)

JG

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
JG rel8 7F ii 01111111 iiiiiiii 2 1 (4 if branch taken)

JGE

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
JGE rel8 7D ii 01111101 iiiiiiii 2 1 (4 if branch taken)

JL

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
JL rel8 7C ii 01111100 iiiiiiii 2 1 (4 if branch taken)

JLE

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
JLE rel8 7E ii 01111110 iiiiiiii 2 1 (4 if branch taken)

JMP

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
JMP ptr16:16 EA oo oo ss ss 11101010 oooooooo oooooooo ssssssss ssssssss 5 7
JMP mem16 FF /4 11111111 oo100mmm 2+ 5
JMP mem16:16 FF /5 11111111 oo101mmm 2+ 10
JMP reg16 FF /4 11111111 11100mmm 2 4
JMP rel8 EB ii 11101011 iiiiiiii 2 4
JMP rel16 E9 ii ii 11101001 iiiiiiii iiiiiiii 3 4

JNC/JAE

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
JNC rel8 73 ii 01110011 iiiiiiii 2 1 (4 if branch taken)

JNO

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
JNO rel8 71 ii 01110001 iiiiiiii 2 1 (4 if branch taken)

JNP

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
JNP rel8 7B ii 01111011 iiiiiiii 2 1 (4 if branch taken)

JNS

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
JNS rel8 79 ii 01111001 iiiiiiii 2 1 (4 if branch taken)

JNZ/JNE

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
JNZ rel8 75 ii 01110101 iiiiiiii 2 1 (4 if branch taken)

JO

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
JO rel8 70 ii 01110000 iiiiiiii 2 1 (4 if branch taken)

JP

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
JP rel8 7A ii 01111010 iiiiiiii 2 1 (4 if branch taken)

JS

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
JS rel8 78 ii 01111000 iiiiiiii 2 1 (4 if branch taken)

JZ/JE

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
JZ rel8 74 ii 01110100 iiiiiiii 2 1 (4 if branch taken)

LAHF

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
LAHF 9F 10011111 1 2

LDS

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
LDS reg16, mem16 C5 /r 11000101 oorrrmmm 2+ 6

LEA

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
LEA reg16, mem16 8D /r 10001101 oorrrmmm 2+ 1

LEAVE

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
LEAVE C9 11001001 1 2

LES

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
LES reg16, mem16 C4 /r 11000100 oorrrmmm 2+ 6

LOCK

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
LOCK F0 11110000 1 1

LODSB/LODSW

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
LODSB AC 10101100 1 3
LODSW AD 10101101 1 3

LOOP

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
LOOP rel8 E2 ii 11100010 iiiiiiii 2 2 (5 if branch taken)

LOOPE

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
LOOPE rel8 E1 ii 11100001 iiiiiiii 2 3 (6 if branch taken)

LOOPNE

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
LOOPNE rel8 E0 ii 11100000 iiiiiiii 2 3 (6 if branch taken)

MOV

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
MOV AL, ptr16 A0 ii ii 10100000 iiiiiiii iiiiiiii 3 1
MOV AX, ptr16 A1 ii ii 10100001 iiiiiiii iiiiiiii 3 1
MOV mem8, imm8 C6 /0 ii 11000110 oo000mmm iiiiiiii 3+ 1
MOV mem16, imm16 C7 /0 ii ii 11000111 oo000mmm iiiiiiii iiiiiiii 4+ 1
MOV mem8, reg8 84 /r 10001000 oorrrmmm 2+ 1
MOV mem16, reg16 85 /r 10001001 oorrrmmm 2+ 1
MOV mem16, sreg16 8C /r 10001100 oo0rrmmm 2+ 3
MOV ptr16, AL A2 ii ii 10100010 iiiiiiii iiiiiiii 3 1
MOV ptr16, AX A3 ii ii 10100011 iiiiiiii iiiiiiii 3 1
MOV reg8, imm8 Bx ii 10110rrr iiiiiiii 2 1
MOV reg8, imm8 C6 /0 ii 11000110 11000mmm iiiiiiii 3 1
MOV reg16, imm16 Bx ii 10111rrr iiiiiiii iiiiiiii 3 1
MOV reg16, imm16 C7 /0 ii ii 11000111 11000mmm iiiiiiii iiiiiiii 4 1
MOV reg8, mem8 8A /r 10001010 oorrrmmm 2+ 1
MOV reg16, mem16 8B /r 10001011 oorrrmmm 2+ 1
MOV reg8, reg8 88 /r 100010.0 11rrrmmm 2 1
MOV reg16, reg16 89 /r 100010.1 11rrrmmm 2 1
MOV reg16, sreg16 8C /r 10001100 110rrmmm 2 1
MOV sreg16, mem16 8E /r 10001110 oo0rrmmm 2 3
MOV sreg16, reg16 8E /r 10001110 110rrmmm 2+ 2

MOVSB/MOVSW

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
MOVSB A4 10100100 1 5
MOVSW A5 10100101 1 5

MUL

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
MUL mem8 F6 /4 11110110 oo100mmm 2+ 4
MUL mem16 F7 /4 11111111 oo100mmm 2+ 4
MUL reg8 F6 /4 11111110 11100mmm 2 3
MUL reg16 F7 /4 11111111 11100mmm 2 3

NEG

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
NEG mem8 F6 /3 11110110 oo011mmm 2+ 3
NEG mem16 F7 /3 11111111 oo011mmm 2+ 3
NEG reg8 F6 /3 11111110 11011mmm 2 1
NEG reg16 F7 /3 11111111 11011mmm 2 1

NOP

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
NOP 90 10010000 1 1

NOT

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
NOT mem8 F6 /2 11110110 oo010mmm 2+ 3
NOT mem16 F7 /2 11111111 oo010mmm 2+ 3
NOT reg8 F6 /2 11111110 11010mmm 2 1
NOT reg16 F7 /2 11111111 11010mmm 2 1

OR

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
OR AL, imm 0C ii 00001100 iiiiiiii 2 1
OR AX, imm 0D ii ii 00001101 iiiiiiii iiiiiiii 3 1
OR mem8, imm8 80 /6 ii 10000000 oo001mmm iiiiiiii 3+ 3
OR mem16, imm16 81 /6 ii ii 10000001 oo001mmm iiiiiiii iiiiiiii 4+ 3
OR mem16, simm8 83 /6 ii 10000011 oo001mmm iiiiiiii 3+ 3
OR mem8, reg8 08 /r 00001000 oorrrmmm 2+ 3
OR mem16, reg16 09 /r 00001001 oorrrmmm 2+ 3
OR reg8, imm8 80 /6 ii 10000000 11001mmm iiiiiiii 3 1
OR reg16, imm16 81 /6 ii ii 10000001 11001mmm iiiiiiii iiiiiiii 4 1
OR reg16, simm8 83 /6 ii 10000011 11001mmm iiiiiiii 3 1
OR reg8, mem8 0A /r 00001010 oorrrmmm 2+ 2
OR reg16, mem16 0B /r 00001011 oorrrmmm 2+ 2
OR reg8, reg8 08 /r 000010.0 11rrrmmm 2 1
OR reg16, reg16 09 /r 000010.1 11rrrmmm 2 1

OUT

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
OUT AL, DX EE 11101110 1 6
OUT AX, DX EF 11101111 1 6
OUT AL, imm8 E6 ii 11100110 iiiiiiii 2 6
OUT AX, imm8 E7 ii 11100111 iiiiiiii 2 6

OUTSB/OUTSW

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
OUTSB 6E 01101110 1 6
OUTSW 6F 01101111 1 6

POLL

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
POLL 6E 01101110 1 9[1]

POP

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
POP mem16 8F /0 10001111 oo000mmm 2+ 3
POP reg16 5x 01011xxx 1 1
POP reg16 8F /0 10001111 11000mmm 2 1
POP sreg16 xx 000xx111 1 3

POPA

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
POPA 61 01100001 1 8

POPF

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
POPF 9D 10011101 1 3

PUSH

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
PUSH imm8 6A ii 01101010 iiiiiiii 2 1
PUSH imm16 68 ii ii 01101000 iiiiiiii iiiiiiii 3 1
PUSH mem16 FF /6 11111111 oo110mmm 2+ 2
PUSH reg16 5x 01010xxx 1 1
PUSH reg16 FF /6 11111111 11110mmm 2 1
PUSH sreg16 xx 000xx110 1 2

PUSHA

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
PUSHA 60 01100000 1 9

PUSHF

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
PUSHF 9C 10011100 1 2

RCL

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
RCL mem8, 1 D0 /2 11010000 oo010rm 2+ 3
RCL mem8, CL D2 /2 11010010 oo010rm 2+ 5
RCL mem8, imm8 C0 /2 ii 11000000 oo010mmm iiiiiiii 3+ 5
RCL mem16, 1 D1 /2 11010001 oo010rm 2+ 3
RCL mem16, CL D3 /2 11010011 oo010rm 2+ 5
RCL mem16, imm8 C1 /2 ii 11000001 oo010mmm iiiiiiii 3+ 5
RCL reg8, 1 D0 /2 11010000 11010rm 2 1
RCL reg8, CL D2 /2 11010010 11010rm 2 3
RCL reg8, imm8 C0 /2 ii 11000000 11010mmm iiiiiiii 3 3
RCL reg16, 1 D1 /2 11010001 11010rm 2 1
RCL reg16, CL D3 /2 11010011 11010rm 2 3
RCL reg16, imm8 C1 /2 ii 11000001 11010mmm iiiiiiii 3 3

RCR

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
RCR mem8, 1 D0 /3 11010000 oo011rm 2+ 3
RCR mem8, CL D2 /3 11010010 oo011rm 2+ 5
RCR mem8, imm8 C0 /3 ii 11000000 oo011mmm iiiiiiii 3+ 5
RCR mem16, 1 D1 /3 11010001 oo011rm 2+ 3
RCR mem16, CL D3 /3 11010011 oo011rm 2+ 5
RCR mem16, imm8 C1 /3 ii 11000001 oo011mmm iiiiiiii 3+ 5
RCR reg8, 1 D0 /3 11010000 11011rm 2 1
RCR reg8, CL D2 /3 11010010 11011rm 2 3
RCR reg8, imm8 C0 /3 ii 11000000 11011mmm iiiiiiii 3 3
RCR reg16, 1 D1 /3 11010001 11011rm 2 1
RCR reg16, CL D3 /3 11010011 11011rm 2 3
RCR reg16, imm8 C1 /3 ii 11000001 11011mmm iiiiiiii 3 3

REP/REPE/REPZ

REPNE/REPNZ

RET

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
RET C3 11000011 1 6
RET imm16 C2 ii ii 11000010 iiiiiiii iiiiiiii 1 6

RETF

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
RETF CB 11001011 1 8
RETF imm16 CA ii ii 11001010 iiiiiiii iiiiiiii 1 9

ROL

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
ROL mem8, 1 D0 /0 11010000 oo000rm 2+ 3
ROL mem8, CL D2 /0 11010010 oo000rm 2+ 5
ROL mem8, imm8 C0 /0 ii 11000000 oo000mmm iiiiiiii 3+ 5
ROL mem16, 1 D1 /0 11010001 oo000rm 2+ 3
ROL mem16, CL D3 /0 11010011 oo000rm 2+ 5
ROL mem16, imm8 C1 /0 ii 11000001 oo000mmm iiiiiiii 3+ 5
ROL reg8, 1 D0 /0 11010000 11000rm 2 1
ROL reg8, CL D2 /0 11010010 11000rm 2 3
ROL reg8, imm8 C0 /0 ii 11000000 11000mmm iiiiiiii 3 3
ROL reg16, 1 D1 /0 11010001 11000rm 2 1
ROL reg16, CL D3 /0 11010011 11000rm 2 3
ROL reg16, imm8 C1 /0 ii 11000001 11000mmm iiiiiiii 3 3

ROR

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
ROR mem8, 1 D0 /1 11010000 oo001rm 2+ 3
ROR mem8, CL D2 /1 11010010 oo001rm 2+ 5
ROR mem8, imm8 C0 /1 ii 11000000 oo001mmm iiiiiiii 3+ 5
ROR mem16, 1 D1 /1 11010001 oo001rm 2+ 3
ROR mem16, CL D3 /1 11010011 oo001rm 2+ 5
ROR mem16, imm8 C1 /1 ii 11000001 oo001mmm iiiiiiii 3+ 5
ROR reg8, 1 D0 /1 11010000 11001rm 2 1
ROR reg8, CL D2 /1 11010010 11001rm 2 3
ROR reg8, imm8 C0 /1 ii 11000000 11001mmm iiiiiiii 3 3
ROR reg16, 1 D1 /1 11010001 11001rm 2 1
ROR reg16, CL D3 /1 11010011 11001rm 2 3
ROR reg16, imm8 C1 /1 ii 11000001 11001mmm iiiiiiii 3 3

SAHF

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
SAHF 9E 10011110 1 4

SAR

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
SAR mem8, 1 D0 /7 11010000 oo111rm 2+ 3
SAR mem8, CL D2 /7 11010010 oo111rm 2+ 5
SAR mem8, imm8 C0 /7 ii 11000000 oo111mmm iiiiiiii 3+ 5
SAR mem16, 1 D1 /7 11010001 oo111rm 2+ 3
SAR mem16, CL D3 /7 11010011 oo111rm 2+ 5
SAR mem16, imm8 C1 /7 ii 11000001 oo111mmm iiiiiiii 3+ 5
SAR reg8, 1 D0 /7 11010000 11111rm 2 1
SAR reg8, CL D2 /7 11010010 11111rm 2 3
SAR reg8, imm8 C0 /7 ii 11000000 11111mmm iiiiiiii 3 3
SAR reg16, 1 D1 /7 11010001 11111rm 2 1
SAR reg16, CL D3 /7 11010011 11111rm 2 3
SAR reg16, imm8 C1 /7 ii 11000001 11111mmm iiiiiiii 3 3

SBB

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
SBB AL, imm 1C ii 00011100 iiiiiiii 2 1
SBB AX, imm 1D ii ii 00011101 iiiiiiii iiiiiiii 3 1
SBB mem8, imm8 80 /3 ii 10000000 oo011mmm iiiiiiii 3+ 3
SBB mem16, imm16 81 /3 ii ii 10000001 oo011mmm iiiiiiii iiiiiiii 4+ 3
SBB mem16, simm8 83 /3 ii 10000011 oo011mmm iiiiiiii 3+ 3
SBB mem8, reg8 18 /r 00011000 oorrrmmm 2+ 3
SBB mem16, reg16 19 /r 00011001 oorrrmmm 2+ 3
SBB reg8, imm8 80 /3 ii 10000000 11011mmm iiiiiiii 3 1
SBB reg16, imm16 81 /3 ii ii 10000001 11011mmm iiiiiiii iiiiiiii 4 1
SBB reg16, simm8 83 /3 ii 10000011 11011mmm iiiiiiii 3 1
SBB reg8, mem8 1A /r 00011010 oorrrmmm 2+ 2
SBB reg16, mem16 1B /r 00011011 oorrrmmm 2+ 2
SBB reg8, reg8 18 /r 000110.0 11rrrmmm 2 1
SBB reg16, reg16 19 /r 000110.1 11rrrmmm 2 1

SCASB/SCASW

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
SCASB AE 10101110 1 4
SCASW AF 10101111 1 4

SHL

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
SHL mem8, 1 D0 /4 11010000 oo100rm 2+ 3
SHL mem8, CL D2 /4 11010010 oo100rm 2+ 5
SHL mem8, imm8 C0 /4 ii 11000000 oo100mmm iiiiiiii 3+ 5
SHL mem16, 1 D1 /4 11010001 oo100rm 2+ 3
SHL mem16, CL D3 /4 11010011 oo100rm 2+ 5
SHL mem16, imm8 C1 /4 ii 11000001 oo100mmm iiiiiiii 3+ 5
SHL reg8, 1 D0 /4 11010000 11100rm 2 1
SHL reg8, CL D2 /4 11010010 11100rm 2 3
SHL reg8, imm8 C0 /4 ii 11000000 11100mmm iiiiiiii 3 3
SHL reg16, 1 D1 /4 11010001 11100rm 2 1
SHL reg16, CL D3 /4 11010011 11100rm 2 3
SHL reg16, imm8 C1 /4 ii 11000001 11100mmm iiiiiiii 3 3

SHR

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
SHR mem8, 1 D0 /5 11010000 oo101rm 2+ 3
SHR mem8, CL D2 /5 11010010 oo101rm 2+ 5
SHR mem8, imm8 C0 /5 ii 11000000 oo101mmm iiiiiiii 3+ 5
SHR mem16, 1 D1 /5 11010001 oo101rm 2+ 3
SHR mem16, CL D3 /5 11010011 oo101rm 2+ 5
SHR mem16, imm8 C1 /5 ii 11000001 oo101mmm iiiiiiii 3+ 5
SHR reg8, 1 D0 /5 11010000 11101rm 2 1
SHR reg8, CL D2 /5 11010010 11101rm 2 3
SHR reg8, imm8 C0 /5 ii 11000000 11101mmm iiiiiiii 3 3
SHR reg16, 1 D1 /5 11010001 11101rm 2 1
SHR reg16, CL D3 /5 11010011 11101rm 2 3
SHR reg16, imm8 C1 /5 ii 11000001 11101mmm iiiiiiii 3 3

SS

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
SS 36 00110110 1 1

STC

Flag New value
CF - Carry 1
Instruction Opcode (hex) Opcode (bin) Bytes Cycles
STC F9 11111001 1 4

STD

Flag New value
DF - Direction 1
Instruction Opcode (hex) Opcode (bin) Bytes Cycles
STD FD 11111101 1 4

STI

Flag New value
IF - Interrupt 1
Instruction Opcode (hex) Opcode (bin) Bytes Cycles
STI FB 11111011 1 4

STOSB/STOSW

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
STOSB AA 10101010 1 3
STOSW AB 10101011 1 3

SUB

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
SUB AL, imm 28 ii 00101100 iiiiiiii 2 1
SUB AX, imm 29 ii ii 00101101 iiiiiiii iiiiiiii 3 1
SUB mem8, imm8 80 /5 ii 10000000 oo101mmm iiiiiiii 3+ 3
SUB mem16, imm16 81 /5 ii ii 10000001 oo101mmm iiiiiiii iiiiiiii 4+ 3
SUB mem16, simm8 83 /5 ii 10000011 oo101mmm iiiiiiii 3+ 3
SUB mem8, reg8 28 /r 00101000 oorrrmmm 2+ 3
SUB mem16, reg16 29 /r 00101001 oorrrmmm 2+ 3
SUB reg8, imm8 80 /5 ii 10000000 11101mmm iiiiiiii 3 1
SUB reg16, imm16 81 /5 ii ii 10000001 11101mmm iiiiiiii iiiiiiii 4 1
SUB reg16, simm8 83 /5 ii 10000011 11101mmm iiiiiiii 3 1
SUB reg8, mem8 2A /r 00101010 oorrrmmm 2+ 2
SUB reg16, mem16 2B /r 00101011 oorrrmmm 2+ 2
SUB reg8, reg8 28 /r 001010.0 11rrrmmm 2 1
SUB reg16, reg16 29 /r 001010.1 11rrrmmm 2 1

TEST

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
TEST AL, imm A8 ii 10101000 iiiiiiii 2 1
TEST AX, imm A9 ii ii 10101001 iiiiiiii iiiiiiii 3 1
TEST mem8, imm8 F6 /0 ii 11110110 oo000mmm iiiiiiii 3+ 2
TEST mem16, imm16 F7 /0 ii ii 11110111 oo000mmm iiiiiiii iiiiiiii 4+ 2
TEST mem8, reg8
TEST reg8, mem8		 84 /r 10000100 oorrrmmm 2+ 2
TEST mem16, reg16
TEST reg16, mem16		 85 /r 10000101 oorrrmmm 2+ 2
TEST reg8, imm8 F6 /0 ii 11110110 11000mmm iiiiiiii 3 1
TEST reg16, imm16 F7 /0 ii ii 11110111 11000mmm iiiiiiii iiiiiiii 4 1
TEST reg8, reg8 84 /r 10000100 11rrrmmm 2 1
TEST reg16, reg16 85 /r 10000101 11rrrmmm 2 1

XCHG

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
XCHG AX, reg16
XCHG reg16, AX		 9x 10010rrr 1 3
XCHG mem8, reg8
XCHG reg8, mem8		 86 /r 10000110 oorrrmmm 2+ 5
XCHG mem16, reg16
XCHG reg16, mem16		 87 /r 10000111 oorrrmmm 2+ 5
XCHG reg8, reg8 86 /r 10000110 11rrrmmm 2+ 3
XCHG reg16, reg16 87 /r 10000111 11rrrmmm 2+ 3

XLAT

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
XLAT D7 11010111 1 5

XOR

Instruction Opcode (hex) Opcode (bin) Bytes Cycles
XOR AL, imm 34 ii 00110100 iiiiiiii 2 1
XOR AX, imm 35 ii ii 00110101 iiiiiiii iiiiiiii 3 1
XOR mem8, imm8 80 /6 ii 10000000 oo110mmm iiiiiiii 3+ 3
XOR mem16, imm16 81 /6 ii ii 10000001 oo110mmm iiiiiiii iiiiiiii 4+ 3
XOR mem16, simm8 83 /6 ii 10000011 oo110mmm iiiiiiii 3+ 3
XOR mem8, reg8 30 /r 00110000 oorrrmmm 2+ 3
XOR mem16, reg16 31 /r 00110001 oorrrmmm 2+ 3
XOR reg8, imm8 80 /6 ii 10000000 11110mmm iiiiiiii 3 1
XOR reg16, imm16 81 /6 ii ii 10000001 11110mmm iiiiiiii iiiiiiii 4 1
XOR reg16, simm8 83 /6 ii 10000011 11110mmm iiiiiiii 3 1
XOR reg8, mem8 32 /r 00110010 oorrrmmm 2+ 2
XOR reg16, mem16 33 /r 00110011 oorrrmmm 2+ 2
XOR reg8, reg8 30 /r 001100.0 11rrrmmm 2 1
XOR reg16, reg16 31 /r 001100.1 11rrrmmm 2 1

Notes

  1. ↑ On the WonderSwan implementation, POLLB is always held low; on other implementations, POLL will wait for POLLB to be held low in 9-cycle intervals.
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