NEC V30MZ instruction set: Difference between revisions

Revision as of 18:02, 26 December 2024

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, marked as oorrrmmm, 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 with an optional signed 8-bit (disp8) or 16-bit (disp16) displacement 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

Note that oo = 00, mmm = 110 is a special case.

Official 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/JB

JCXZ

JG

JGE

JL

JLE

JMP

JNC/JAE

JNO

JNP

JNS

JNZ/JNE

JO

JP

JS

JZ/JE

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/REPE/REPZ

REPNE/REPNZ

RET

RETF

ROL

ROR

SAHF

SAR

SBB

SCASB

SCASW

SHL

SHR

SS

STC

STD

STI

STOSB

STOSW

SUB

TEST

XCHG

XLAT

XOR

@@ Line 522: / Line 522: @@
 === ModR/M byte ===
+The ModR/M byte, marked as <tt>oorrrmmm</tt>, 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 with an optional signed 8-bit (disp8) or 16-bit (disp16) displacement 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
+|}
+Note that ''oo'' = <tt>00</tt>, ''mmm'' = <tt>110</tt> is a special case.
 == Official instructions ==