2003 Mapper pinout

Bandai 2003: 48-pin 0.5mm pitch TQFP

               Gnd -- /01 o 48\ <- CLK								 
            GPO 3 <? /02     47\ <- /SEL             
           GPO 2 <? /03       46\ <- /WR               
          GPO 1 <? /04         45\ <- /RD            
         GPO 0 <? /05           44\ <- M/IO            
          Gnd -- /06             43\ -> /MBC           
     RTC SIO <> /07               42\ <- /Reset        
    RTC SCK <- /08                 41\ <- CPU A16    
    RTC CS <- /09                   40\ <- CPU A17     
  ROM A25 <- /10                     39\ <- CPU A18  
 ROM A24 <- /11        BANDAI         38\ <- CPU A19   
ROM A23 <- /12          2003           37\ <- A3     
ROM A22 <- \13                         36/ <- A2     
 ROM A17 <- \14                       35/ <- A1      
  ROM A16 <- \15                     34/ <- A0         
       Gnd -- \16                   33/ <> D0        
    ROM A20 <- \17                 32/ <> D1           
     ROM A21 <- \18               31/ <> D2            
      ROM A19 <- \19             30/ -- Vcc          
       ROM A18 <- \20           29/ <> D3              
       SRAM /CS <- \21         28/ <> D4               
         ROM /CS <- \22       27/ <> D5              
        ROM /BYTE <- \23     26/ <> D6               
         D15 (A-1) <Z \24 O 25/ <> D7                

Note the orientation of the text: "Bandai 2003" when viewed upright specifies pin 1 is bottom face, leftmost.