/*** Z80Em: Portable Z80 emulator *******************************************/ /*** ***/ /*** Z80Dasm.h ***/ /*** ***/ /*** This file contains a routine to disassemble a buffer containing Z80 ***/ /*** opcodes. It is included from Z80Debug.c and z80dasm.c ***/ /*** ***/ /*** Copyright (C) Marcel de Kogel 1996,1997 ***/ /*** You are not allowed to distribute this software commercially ***/ /*** Please, notify me, if you make any changes to this file ***/ /****************************************************************************/ #include #include #ifndef FALSE #define FALSE (0!=0) #endif extern char *tags[0x10000]; static char *mnemonic_xx_cb[256]= { "#","#","#","#","#","#","rlc Y" ,"#", "#","#","#","#","#","#","rrc Y" ,"#", "#","#","#","#","#","#","rl Y" ,"#", "#","#","#","#","#","#","rr Y" ,"#", "#","#","#","#","#","#","sla Y" ,"#", "#","#","#","#","#","#","sra Y" ,"#", "#","#","#","#","#","#","sll Y" ,"#", "#","#","#","#","#","#","srl Y" ,"#", "#","#","#","#","#","#","bit 0,Y","#", "#","#","#","#","#","#","bit 1,Y","#", "#","#","#","#","#","#","bit 2,Y","#", "#","#","#","#","#","#","bit 3,Y","#", "#","#","#","#","#","#","bit 4,Y","#", "#","#","#","#","#","#","bit 5,Y","#", "#","#","#","#","#","#","bit 6,Y","#", "#","#","#","#","#","#","bit 7,Y","#", "#","#","#","#","#","#","res 0,Y","#", "#","#","#","#","#","#","res 1,Y","#", "#","#","#","#","#","#","res 2,Y","#", "#","#","#","#","#","#","res 3,Y","#", "#","#","#","#","#","#","res 4,Y","#", "#","#","#","#","#","#","res 5,Y","#", "#","#","#","#","#","#","res 6,Y","#", "#","#","#","#","#","#","res 7,Y","#", "#","#","#","#","#","#","set 0,Y","#", "#","#","#","#","#","#","set 1,Y","#", "#","#","#","#","#","#","set 2,Y","#", "#","#","#","#","#","#","set 3,Y","#", "#","#","#","#","#","#","set 4,Y","#", "#","#","#","#","#","#","set 5,Y","#", "#","#","#","#","#","#","set 6,Y","#", "#","#","#","#","#","#","set 7,Y","#" }; static char *mnemonic_cb[256]= { "rlc b" ,"rlc c" ,"rlc d" ,"rlc e" ,"rlc h" ,"rlc l" ,"rlc (hl)" ,"rlc a" , "rrc b" ,"rrc c" ,"rrc d" ,"rrc e" ,"rrc h" ,"rrc l" ,"rrc (hl)" ,"rrc a" , "rl b" ,"rl c" ,"rl d" ,"rl e" ,"rl h" ,"rl l" ,"rl (hl)" ,"rl a" , "rr b" ,"rr c" ,"rr d" ,"rr e" ,"rr h" ,"rr l" ,"rr (hl)" ,"rr a" , "sla b" ,"sla c" ,"sla d" ,"sla e" ,"sla h" ,"sla l" ,"sla (hl)" ,"sla a" , "sra b" ,"sra c" ,"sra d" ,"sra e" ,"sra h" ,"sra l" ,"sra (hl)" ,"sra a" , "sll b" ,"sll c" ,"sll d" ,"sll e" ,"sll h" ,"sll l" ,"sll (hl)" ,"sll a" , "srl b" ,"srl c" ,"srl d" ,"srl e" ,"srl h" ,"srl l" ,"srl (hl)" ,"srl a" , "bit 0,b","bit 0,c","bit 0,d","bit 0,e","bit 0,h","bit 0,l","bit 0,(hl)","bit 0,a", "bit 1,b","bit 1,c","bit 1,d","bit 1,e","bit 1,h","bit 1,l","bit 1,(hl)","bit 1,a", "bit 2,b","bit 2,c","bit 2,d","bit 2,e","bit 2,h","bit 2,l","bit 2,(hl)","bit 2,a", "bit 3,b","bit 3,c","bit 3,d","bit 3,e","bit 3,h","bit 3,l","bit 3,(hl)","bit 3,a", "bit 4,b","bit 4,c","bit 4,d","bit 4,e","bit 4,h","bit 4,l","bit 4,(hl)","bit 4,a", "bit 5,b","bit 5,c","bit 5,d","bit 5,e","bit 5,h","bit 5,l","bit 5,(hl)","bit 5,a", "bit 6,b","bit 6,c","bit 6,d","bit 6,e","bit 6,h","bit 6,l","bit 6,(hl)","bit 6,a", "bit 7,b","bit 7,c","bit 7,d","bit 7,e","bit 7,h","bit 7,l","bit 7,(hl)","bit 7,a", "res 0,b","res 0,c","res 0,d","res 0,e","res 0,h","res 0,l","res 0,(hl)","res 0,a", "res 1,b","res 1,c","res 1,d","res 1,e","res 1,h","res 1,l","res 1,(hl)","res 1,a", "res 2,b","res 2,c","res 2,d","res 2,e","res 2,h","res 2,l","res 2,(hl)","res 2,a", "res 3,b","res 3,c","res 3,d","res 3,e","res 3,h","res 3,l","res 3,(hl)","res 3,a", "res 4,b","res 4,c","res 4,d","res 4,e","res 4,h","res 4,l","res 4,(hl)","res 4,a", "res 5,b","res 5,c","res 5,d","res 5,e","res 5,h","res 5,l","res 5,(hl)","res 5,a", "res 6,b","res 6,c","res 6,d","res 6,e","res 6,h","res 6,l","res 6,(hl)","res 6,a", "res 7,b","res 7,c","res 7,d","res 7,e","res 7,h","res 7,l","res 7,(hl)","res 7,a", "set 0,b","set 0,c","set 0,d","set 0,e","set 0,h","set 0,l","set 0,(hl)","set 0,a", "set 1,b","set 1,c","set 1,d","set 1,e","set 1,h","set 1,l","set 1,(hl)","set 1,a", "set 2,b","set 2,c","set 2,d","set 2,e","set 2,h","set 2,l","set 2,(hl)","set 2,a", "set 3,b","set 3,c","set 3,d","set 3,e","set 3,h","set 3,l","set 3,(hl)","set 3,a", "set 4,b","set 4,c","set 4,d","set 4,e","set 4,h","set 4,l","set 4,(hl)","set 4,a", "set 5,b","set 5,c","set 5,d","set 5,e","set 5,h","set 5,l","set 5,(hl)","set 5,a", "set 6,b","set 6,c","set 6,d","set 6,e","set 6,h","set 6,l","set 6,(hl)","set 6,a", "set 7,b","set 7,c","set 7,d","set 7,e","set 7,h","set 7,l","set 7,(hl)","set 7,a" }; static char *mnemonic_ed[256]= { "!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" , "!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" , "!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" , "!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" , "!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" , "!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" , "!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" , "!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" , "in b,(c)","out (c),b","sbc hl,bc","ld (W),bc","neg","retn","im 0","ld i,a", "in c,(c)","out (c),c","adc hl,bc","ld bc,(W)","!" ,"reti","!" ,"ld r,a", "in d,(c)","out (c),d","sbc hl,de","ld (W),de","!" ,"!" ,"im 1","ld a,i", "in e,(c)","out (c),e","adc hl,de","ld de,(W)","!" ,"!" ,"im 2","ld a,r", "in h,(c)","out (c),h","sbc hl,hl","ld (W),hl","!" ,"!" ,"!" ,"rrd" , "in l,(c)","out (c),l","adc hl,hl","ld hl,(W)","!" ,"!" ,"!" ,"rld" , "in 0,(c)","out (c),0","sbc hl,sp","ld (W),sp","!" ,"!" ,"!" ,"!" , "in a,(c)","out (c),a","adc hl,sp","ld sp,(W)","!" ,"!" ,"!" ,"!" , "!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" , "!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" , "!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" , "!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" , "ldi" ,"cpi" ,"ini" ,"outi" ,"!" ,"!" ,"!" ,"!" , "ldd" ,"cpd" ,"ind" ,"outd" ,"!" ,"!" ,"!" ,"!" , "ldir" ,"cpir" ,"inir" ,"otir" ,"!" ,"!" ,"!" ,"!" , "lddr" ,"cpdr" ,"indr" ,"otdr" ,"!" ,"!" ,"!" ,"!" , "!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" , "!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" , "!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" , "!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" , "!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" , "!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" , "!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" , "!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" ,"!" }; static char *mnemonic_xx[256]= { "@" ,"@" ,"@" ,"@" ,"@" ,"@" ,"@" ,"@" , "@" ,"add I,bc","@" ,"@" ,"@" ,"@" ,"@" ,"@" , "@" ,"@" ,"@" ,"@" ,"@" ,"@" ,"@" ,"@" , "@" ,"add I,de","@" ,"@" ,"@" ,"@" ,"@" ,"@" , "@" ,"ld I,W" ,"ld (W),I","inc I" ,"inc Ih" ,"dec Ih" ,"ld Ih,B","@" , "@" ,"add I,I" ,"ld I,(W)","dec I" ,"inc Il" ,"dec Il" ,"ld Il,B","@" , "@" ,"@" ,"@" ,"@" ,"inc X" ,"dec X" ,"ld X,B" ,"@" , "@" ,"add I,sp","@" ,"@" ,"@" ,"@" ,"@" ,"@" , "@" ,"@" ,"@" ,"@" ,"ld b,Ih" ,"ld b,Il" ,"ld b,X" ,"@" , "@" ,"@" ,"@" ,"@" ,"ld c,Ih" ,"ld c,Il" ,"ld c,X" ,"@" , "@" ,"@" ,"@" ,"@" ,"ld d,Ih" ,"ld d,Il" ,"ld d,X" ,"@" , "@" ,"@" ,"@" ,"@" ,"ld e,Ih" ,"ld e,Il" ,"ld e,X" ,"@" , "ld Ih,b","ld Ih,c" ,"ld Ih,d" ,"ld Ih,e" ,"ld Ih,h" ,"ld Ih,l" ,"ld h,X" ,"ld Ih,a", "ld Il,b","ld Il,c" ,"ld Il,d" ,"ld Il,e" ,"ld Il,h" ,"ld Il,l" ,"ld l,X" ,"ld Il,a", "ld X,b" ,"ld X,c" ,"ld X,d" ,"ld X,e" ,"ld X,h" ,"ld X,l" ,"@" ,"ld X,a" , "@" ,"@" ,"@" ,"@" ,"ld a,Ih" ,"ld a,Il" ,"ld a,X" ,"@" , "@" ,"@" ,"@" ,"@" ,"add a,Ih","add a,Il","add a,X","@" , "@" ,"@" ,"@" ,"@" ,"adc a,Ih","adc a,Il","adc a,X","@" , "@" ,"@" ,"@" ,"@" ,"sub Ih" ,"sub Il" ,"sub X" ,"@" , "@" ,"@" ,"@" ,"@" ,"sbc a,Ih","sbc a,Il","sbc a,X","@" , "@" ,"@" ,"@" ,"@" ,"and Ih" ,"and Il" ,"and X" ,"@" , "@" ,"@" ,"@" ,"@" ,"xor Ih" ,"xor Il" ,"xor X" ,"@" , "@" ,"@" ,"@" ,"@" ,"or Ih" ,"or Il" ,"or X" ,"@" , "@" ,"@" ,"@" ,"@" ,"cp Ih" ,"cp Il" ,"cp X" ,"@" , "@" ,"@" ,"@" ,"@" ,"@" ,"@" ,"@" ,"@" , "@" ,"@" ,"@" ,"fd cb" ,"@" ,"@" ,"@" ,"@" , "@" ,"@" ,"@" ,"@" ,"@" ,"@" ,"@" ,"@" , "@" ,"@" ,"@" ,"@" ,"@" ,"@" ,"@" ,"@" , "@" ,"pop I" ,"@" ,"ex (sp),I","@" ,"push I" ,"@" ,"@" , "@" ,"jp (I)" ,"@" ,"@" ,"@" ,"@" ,"@" ,"@" , "@" ,"@" ,"@" ,"@" ,"@" ,"@" ,"@" ,"@" , "@" ,"ld sp,I" ,"@" ,"@" ,"@" ,"@" ,"@" ,"@" }; static char *mnemonic_main[256]= { "nop" ,"ld bc,W" ,"ld (bc),a","inc bc" ,"inc b" ,"dec b" ,"ld b,B" ,"rlca" , "ex af,af'","add hl,bc","ld a,(bc)","dec bc" ,"inc c" ,"dec c" ,"ld c,B" ,"rrca" , "djnz R" ,"ld de,W" ,"ld (de),a","inc de" ,"inc d" ,"dec d" ,"ld d,B" ,"rla" , "jr R" ,"add hl,de","ld a,(de)","dec de" ,"inc e" ,"dec e" ,"ld e,B" ,"rra" , "jr nz,R" ,"ld hl,W" ,"ld (W),hl","inc hl" ,"inc h" ,"dec h" ,"ld h,B" ,"daa" , "jr z,R" ,"add hl,hl","ld hl,(W)","dec hl" ,"inc l" ,"dec l" ,"ld l,B" ,"cpl" , "jr nc,R" ,"ld sp,W" ,"ld (W),a" ,"inc sp" ,"inc (hl)" ,"dec (hl)" ,"ld (hl),B" ,"scf" , "jr c,R" ,"add hl,sp","ld a,(W)" ,"dec sp" ,"inc a" ,"dec a" ,"ld a,B" ,"ccf" , "ld b,b" ,"ld b,c" ,"ld b,d" ,"ld b,e" ,"ld b,h" ,"ld b,l" ,"ld b,(hl)" ,"ld b,a" , "ld c,b" ,"ld c,c" ,"ld c,d" ,"ld c,e" ,"ld c,h" ,"ld c,l" ,"ld c,(hl)" ,"ld c,a" , "ld d,b" ,"ld d,c" ,"ld d,d" ,"ld d,e" ,"ld d,h" ,"ld d,l" ,"ld d,(hl)" ,"ld d,a" , "ld e,b" ,"ld e,c" ,"ld e,d" ,"ld e,e" ,"ld e,h" ,"ld e,l" ,"ld e,(hl)" ,"ld e,a" , "ld h,b" ,"ld h,c" ,"ld h,d" ,"ld h,e" ,"ld h,h" ,"ld h,l" ,"ld h,(hl)" ,"ld h,a" , "ld l,b" ,"ld l,c" ,"ld l,d" ,"ld l,e" ,"ld l,h" ,"ld l,l" ,"ld l,(hl)" ,"ld l,a" , "ld (hl),b","ld (hl),c","ld (hl),d","ld (hl),e" ,"ld (hl),h","ld (hl),l","halt" ,"ld (hl),a", "ld a,b" ,"ld a,c" ,"ld a,d" ,"ld a,e" ,"ld a,h" ,"ld a,l" ,"ld a,(hl)" ,"ld a,a" , "add a,b" ,"add a,c" ,"add a,d" ,"add a,e" ,"add a,h" ,"add a,l" ,"add a,(hl)","add a,a" , "adc a,b" ,"adc a,c" ,"adc a,d" ,"adc a,e" ,"adc a,h" ,"adc a,l" ,"adc a,(hl)","adc a,a" , "sub b" ,"sub c" ,"sub d" ,"sub e" ,"sub h" ,"sub l" ,"sub (hl)" ,"sub a" , "sbc a,b" ,"sbc a,c" ,"sbc a,d" ,"sbc a,e" ,"sbc a,h" ,"sbc a,l" ,"sbc a,(hl)","sbc a,a" , "and b" ,"and c" ,"and d" ,"and e" ,"and h" ,"and l" ,"and (hl)" ,"and a" , "xor b" ,"xor c" ,"xor d" ,"xor e" ,"xor h" ,"xor l" ,"xor (hl)" ,"xor a" , "or b" ,"or c" ,"or d" ,"or e" ,"or h" ,"or l" ,"or (hl)" ,"or a" , "cp b" ,"cp c" ,"cp d" ,"cp e" ,"cp h" ,"cp l" ,"cp (hl)" ,"cp a" , "ret nz" ,"pop bc" ,"jp nz,W" ,"jp W" ,"call nz,W","push bc" ,"add a,B" ,"rst 00h" , "ret z" ,"ret" ,"jp z,W" ,"cb" ,"call z,W" ,"call W" ,"adc a,B" ,"rst 08h" , "ret nc" ,"pop de" ,"jp nc,W" ,"out (B),a" ,"call nc,W","push de" ,"sub B" ,"rst 10h" , "ret c" ,"exx" ,"jp c,W" ,"in a,(B)" ,"call c,W" ,"dd" ,"sbc a,B" ,"rst 18h" , "ret po" ,"pop hl" ,"jp po,W" ,"ex (sp),hl","call po,W","push hl" ,"and B" ,"rst 20h" , "ret pe" ,"jp (hl)" ,"jp pe,W" ,"ex de,hl" ,"call pe,W","ed" ,"xor B" ,"rst 28h" , "ret p" ,"pop af" ,"jp p,W" ,"di" ,"call p,W" ,"push af" ,"or B" ,"rst 30h" , "ret m" ,"ld sp,hl" ,"jp m,W" ,"ei" ,"call m,W" ,"fd" ,"cp B" ,"rst 38h" }; static char Sign (unsigned char a) { return (a&128)? '-':'+'; } static int Abs (unsigned char a) { if (a&128) return 256-a; else return a; } /****************************************************************************/ /* Disassemble first opcode in buffer and return number of bytes it takes */ /****************************************************************************/ static int Z80_Dasm (unsigned char *buffer,char *dest,unsigned PC) { char *S; char *r; int i,j,k; unsigned char buf[13]; char Offset; strcpy(dest, "// "); dest += 3; i=Offset=0; r="INTERNAL PROGRAM ERROR"; dest[0]='\0'; switch (buffer[i]) { case 0xCB: i++; S=mnemonic_cb[buffer[i++]]; break; case 0xED: i++; S=mnemonic_ed[buffer[i++]]; break; case 0xDD: i++; r="ix"; switch (buffer[i]) { case 0xcb: i++; Offset=buffer[i++]; S=mnemonic_xx_cb[buffer[i++]]; break; default: S=mnemonic_xx[buffer[i++]]; break; } break; case 0xFD: i++; r="iy"; switch (buffer[i]) { case 0xcb: i++; Offset=buffer[i++]; S=mnemonic_xx_cb[buffer[i++]]; break; default: S=mnemonic_xx[buffer[i++]]; break; } break; default: S=mnemonic_main[buffer[i++]]; break; } for (j=0;S[j];++j) { switch (S[j]) { case 'B': sprintf (buf,"$%02x",buffer[i++]); strcat (dest,buf); break; case 'R': sprintf (buf,"$%04x",(PC+2+(signed char)buffer[i])&0xFFFF); i++; strcat (dest,buf); break; case 'W': if (tags[buffer[i]+buffer[i+1]*256] == NULL) { sprintf (buf,"$%04x",buffer[i]+buffer[i+1]*256); } else { sprintf (buf,"%s",tags[buffer[i]+buffer[i+1]*256]); } i+=2; strcat (dest,buf); break; case 'X': sprintf (buf,"(%s%c$%02x)",r,Sign(buffer[i]),Abs(buffer[i])); i++; strcat (dest,buf); break; case 'Y': sprintf (buf,"(%s%c$%02x)",r,Sign(Offset),Abs(Offset)); strcat (dest,buf); break; case 'I': strcat (dest,r); break; case '!': sprintf (dest,"db $ed,$%02x",buffer[1]); return 2; case '@': sprintf (dest,"db $%02x",buffer[0]); return 1; case '#': sprintf (dest,"db $%02x,$cb,$%02x",buffer[0],buffer[2]); return 2; case ' ': k=strlen(dest); if (k<6) k=7-k; else k=1; memset (buf,' ',k); buf[k]='\0'; strcat (dest,buf); break; default: buf[0]=S[j]; buf[1]='\0'; strcat (dest,buf); break; } } return i; } #ifdef TEST #include int main (int argc,char *argv[]) { int i; unsigned char buffer[16]; char dest[32]; memset (buffer,0,sizeof(buffer)); for (i=1;i<17 && i