/
Z80Dasm.h
336 lines (326 loc) · 16 KB
/
Z80Dasm.h
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/*** 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 <stdio.h>
#include <string.h>
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;
char buf[256];
char Offset;
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':
sprintf (buf,"$%04x",buffer[i]+buffer[i+1]*256);
i+=2;
strcat (dest,buf);
break;
case 'X':
sprintf (buf,"(%s%c$%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 <stdlib.h>
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<argc;++i) buffer[i-1]=strtoul(argv[i],NULL,16);
for (i=0;i<16;++i) printf ("%02X ",buffer[i]);
printf ("\n");
i=Z80_Dasm (buffer,dest,0);
printf ("%s - %d bytes\n",dest,i);
return 0;
}
#endif