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/ Amiga Magazin: Amiga-CD 1997 September & October / Amiga-CD 1997 #9-10.iso / aminet / gameboyemulator / debug.c < prev    next >
C/C++ Source or Header  |  1995-10-29  |  11KB  |  220 lines
  1. /** VGB: portable GameBoy emulator ***************************/
  2. /**                                                         **/
  3. /**                         Debug.c                         **/
  4. /**                                                         **/
  5. /** This file contains the built-in debugging routine for   **/
  6. /** the GameBoy emulator which is called on each CPU step   **/
  7. /** when Trap==TRUE.                                        **/
  8. /**                                                         **/
  9. /** Copyright (C) Marat Fayzullin 1995                      **/
  10. /**     You are not allowed to distribute this software     **/
  11. /**     commercially. Please, notify me, if you make any    **/
  12. /**     changes to this file.                               **/
  13. /*************************************************************/
  14.  
  15. #include <stdio.h>
  16. #include <string.h>
  17.  
  18. #include "Z80.h"
  19.  
  20.  
  21. void HexByte(char *S,byte V);
  22. int DAsm(char *S,byte *A);
  23.  
  24.  
  25. char *Mnemonics[256] =
  26. {
  27.   "NOP","LD BC,$#","LD (BC),A","INC BC","INC B","DEC B","LD B,$*","RLCA",
  28.   "LD ($#),SP","ADD HL,BC","LD A,(BC)","DEC BC","INC C","DEC C","LD C,$*","RRCA",
  29.   "STOP","LD DE,$#","LD (DE),A","INC DE","INC D","DEC D","LD D,$*","RLA",
  30.   "JR $@","ADD HL,DE","LD A,(DE)","DEC DE","INC E","DEC E","LD E,$*","RRA",
  31.   "JR NZ,$@","LD HL,$#","LD (HL+),A","INC HL","INC H","DEC H","LD H,$*","DAA",
  32.   "JR Z,$@","ADD HL,HL","LD A,(HL+)","DEC HL","INC L","DEC L","LD L,$*","CPL",
  33.   "JR NC,$@","LD SP,$#","LD (HL-),A","INC SP","INC (HL)","DEC (HL)","LD (HL),$*","SCF",
  34.   "JR C,$@","ADD HL,SP","LD A,(HL-)","DEC SP","INC A","DEC A","LD A,$*","CCF",         
  35.   "LD B,B","LD B,C","LD B,D","LD B,E","LD B,H","LD B,L","LD B,(HL)","LD B,A",
  36.   "LD C,B","LD C,C","LD C,D","LD C,E","LD C,H","LD C,L","LD C,(HL)","LD C,A",
  37.   "LD D,B","LD D,C","LD D,D","LD D,E","LD D,H","LD D,L","LD D,(HL)","LD D,A",
  38.   "LD E,B","LD E,C","LD E,D","LD E,E","LD E,H","LD E,L","LD E,(HL)","LD E,A",
  39.   "LD H,B","LD H,C","LD H,D","LD H,E","LD H,H","LD H,L","LD H,(HL)","LD H,A",
  40.   "LD L,B","LD L,C","LD L,D","LD L,E","LD L,H","LD L,L","LD L,(HL)","LD L,A",
  41.   "LD (HL),B","LD (HL),C","LD (HL),D","LD (HL),E","LD (HL),H","LD (HL),L","HALT","LD (HL),A",
  42.   "LD A,B","LD A,C","LD A,D","LD A,E","LD A,H","LD A,L","LD A,(HL)","LD A,A",
  43.   "ADD B","ADD C","ADD D","ADD E","ADD H","ADD L","ADD (HL)","ADD A",
  44.   "ADC B","ADC C","ADC D","ADC E","ADC H","ADC L","ADC (HL)","ADC A",
  45.   "SUB B","SUB C","SUB D","SUB E","SUB H","SUB L","SUB (HL)","SUB A",
  46.   "SBC B","SBC C","SBC D","SBC E","SBC H","SBC L","SBC (HL)","SBC A",
  47.   "AND B","AND C","AND D","AND E","AND H","AND L","AND (HL)","AND A",
  48.   "XOR B","XOR C","XOR D","XOR E","XOR H","XOR L","XOR (HL)","XOR A",
  49.   "OR B","OR C","OR D","OR E","OR H","OR L","OR (HL)","OR A",
  50.   "CP B","CP C","CP D","CP E","CP H","CP L","CP (HL)","CP A",
  51.   "RET NZ","POP BC","JP NZ,$#","JP $#","CALL NZ,$#","PUSH BC","ADD $*","RST 00h",
  52.   "RET Z","RET","JP Z,$#","PREFIX CBh","CALL Z,$#","CALL $#","ADC $*","RST 08h",
  53.   "RET NC","POP DE","JP NC,$#","DB D3h","CALL NC,$#","PUSH DE","SUB $*","RST 10h",
  54.   "RET C","RETI","JP C,$#","DB DBh","CALL C,$#","DB DDh","SBC $*","RST 18h",
  55.   "LD ($FF*),A","POP HL","LD (FF00h+C),A","EX HL,(SP)","DB E4h","PUSH HL","AND $*","RST 20h",
  56.   "ADD SP,$@","LD PC,HL","LD ($#),A","DB EBh","DB ECh","PREFIX EDh","XOR $*","RST 28h",
  57.   "LD A,($FF*)","POP AF","DB F2h","DI","DB F4h","PUSH AF","OR $*","RST 30h",
  58.   "LDHL SP,$@","LD SP,HL","LD A,($#)","EI","DB FCh","DB FDh","CP $*","RST 38h"               
  59. };
  60.  
  61. char *MnemonicsCB[256] =
  62. {
  63.   "RLC B","RLC C","RLC D","RLC E","RLC H","RLC L","RLC (HL)","RLC A",
  64.   "RRC B","RRC C","RRC D","RRC E","RRC H","RRC L","RRC (HL)","RRC A",
  65.   "RL B","RL C","RL D","RL E","RL H","RL L","RL (HL)","RL A",
  66.   "RR B","RR C","RR D","RR E","RR H","RR L","RR (HL)","RR A",
  67.   "SLA B","SLA C","SLA D","SLA E","SLA H","SLA L","SLA (HL)","SLA A",
  68.   "SRA B","SRA C","SRA D","SRA E","SRA H","SRA L","SRA (HL)","SRA A",
  69.   "SWAP B","SWAP C","SWAP D","SWAP E","SWAP H","SWAP L","SWAP (HL)","SWAP A",
  70.   "SRL B","SRL C","SRL D","SRL E","SRL H","SRL L","SRL (HL)","SRL A",
  71.   "BIT 0,B","BIT 0,C","BIT 0,D","BIT 0,E","BIT 0,H","BIT 0,L","BIT 0,(HL)","BIT 0,A",
  72.   "BIT 1,B","BIT 1,C","BIT 1,D","BIT 1,E","BIT 1,H","BIT 1,L","BIT 1,(HL)","BIT 1,A",
  73.   "BIT 2,B","BIT 2,C","BIT 2,D","BIT 2,E","BIT 2,H","BIT 2,L","BIT 2,(HL)","BIT 2,A",
  74.   "BIT 3,B","BIT 3,C","BIT 3,D","BIT 3,E","BIT 3,H","BIT 3,L","BIT 3,(HL)","BIT 3,A",
  75.   "BIT 4,B","BIT 4,C","BIT 4,D","BIT 4,E","BIT 4,H","BIT 4,L","BIT 4,(HL)","BIT 4,A",
  76.   "BIT 5,B","BIT 5,C","BIT 5,D","BIT 5,E","BIT 5,H","BIT 5,L","BIT 5,(HL)","BIT 5,A",
  77.   "BIT 6,B","BIT 6,C","BIT 6,D","BIT 6,E","BIT 6,H","BIT 6,L","BIT 6,(HL)","BIT 6,A",
  78.   "BIT 7,B","BIT 7,C","BIT 7,D","BIT 7,E","BIT 7,H","BIT 7,L","BIT 7,(HL)","BIT 7,A",
  79.   "RES 0,B","RES 0,C","RES 0,D","RES 0,E","RES 0,H","RES 0,L","RES 0,(HL)","RES 0,A",
  80.   "RES 1,B","RES 1,C","RES 1,D","RES 1,E","RES 1,H","RES 1,L","RES 1,(HL)","RES 1,A",
  81.   "RES 2,B","RES 2,C","RES 2,D","RES 2,E","RES 2,H","RES 2,L","RES 2,(HL)","RES 2,A",
  82.   "RES 3,B","RES 3,C","RES 3,D","RES 3,E","RES 3,H","RES 3,L","RES 3,(HL)","RES 3,A",
  83.   "RES 4,B","RES 4,C","RES 4,D","RES 4,E","RES 4,H","RES 4,L","RES 4,(HL)","RES 4,A",
  84.   "RES 5,B","RES 5,C","RES 5,D","RES 5,E","RES 5,H","RES 5,L","RES 5,(HL)","RES 5,A",
  85.   "RES 6,B","RES 6,C","RES 6,D","RES 6,E","RES 6,H","RES 6,L","RES 6,(HL)","RES 6,A",
  86.   "RES 7,B","RES 7,C","RES 7,D","RES 7,E","RES 7,H","RES 7,L","RES 7,(HL)","RES 7,A",
  87.   "SET 0,B","SET 0,C","SET 0,D","SET 0,E","SET 0,H","SET 0,L","SET 0,(HL)","SET 0,A",
  88.   "SET 1,B","SET 1,C","SET 1,D","SET 1,E","SET 1,H","SET 1,L","SET 1,(HL)","SET 1,A",
  89.   "SET 2,B","SET 2,C","SET 2,D","SET 2,E","SET 2,H","SET 2,L","SET 2,(HL)","SET 2,A",
  90.   "SET 3,B","SET 3,C","SET 3,D","SET 3,E","SET 3,H","SET 3,L","SET 3,(HL)","SET 3,A",
  91.   "SET 4,B","SET 4,C","SET 4,D","SET 4,E","SET 4,H","SET 4,L","SET 4,(HL)","SET 4,A",
  92.   "SET 5,B","SET 5,C","SET 5,D","SET 5,E","SET 5,H","SET 5,L","SET 5,(HL)","SET 5,A",
  93.   "SET 6,B","SET 6,C","SET 6,D","SET 6,E","SET 6,H","SET 6,L","SET 6,(HL)","SET 6,A",
  94.   "SET 7,B","SET 7,C","SET 7,D","SET 7,E","SET 7,H","SET 7,L","SET 7,(HL)","SET 7,A"
  95. };
  96.  
  97. char *MnemonicsED[256] =
  98. {
  99.   "FUCK00","FUCK01","FUCK02","FUCK03","FUCK04","FUCK05","FUCK06","FUCK07",
  100.   "FUCK08","FUCK09","FUCK0A","FUCK0B","FUCK0C","FUCK0D","FUCK0E","FUCK0F",
  101.   "FUCK10","FUCK11","FUCK12","FUCK13","FUCK14","FUCK15","FUCK16","FUCK17",
  102.   "FUCK18","FUCK19","FUCK1A","FUCK1B","FUCK1C","FUCK1D","FUCK1E","FUCK1F",
  103.   "FUCK20","FUCK21","FUCK22","FUCK23","FUCK24","FUCK25","FUCK26","FUCK27",
  104.   "FUCK28","FUCK29","FUCK2A","FUCK2B","FUCK2C","FUCK2D","FUCK2E","FUCK2F",
  105.   "FUCK30","FUCK31","FUCK32","FUCK33","FUCK34","FUCK35","FUCK36","FUCK37",
  106.   "FUCK38","FUCK39","FUCK3A","FUCK3B","FUCK3C","FUCK3D","FUCK3E","FUCK3F",
  107.   "FUCK40","FUCK41","SBC HL,BC","LD ($#),BC","FUCK44","RETN","IM 0","LD I,A",
  108.   "FUCK48","FUCK49","ADC HL,BC","LD BC,($#)","FUCK4C","RETI","FUCK4E","LD R,A",
  109.   "FUCK50","FUCK51","SBC HL,DE","LD ($#),DE","FUCK54","FUCK55","IM 1","LD A,I",
  110.   "FUCK58","FUCK59","ADC HL,DE","LD DE,($#)","FUCK5C","FUCK5D","IM 2","LD A,R",
  111.   "FUCK60","FUCK61","SBC HL,HL","LD ($#),HL","FUCK64","FUCK65","FUCK66","RRD",
  112.   "FUCK68","FUCK69","ADC HL,HL","LD HL,($#)","FUCK6C","FUCK6D","FUCK6E","RLD",
  113.   "FUCK70","FUCK71","SBC HL,SP","LD ($#),SP","FUCK74","FUCK75","FUCK76","FUCK77",
  114.   "FUCK78","FUCK79","ADC HL,SP","LD SP,($#)","FUCK7C","FUCK7D","FUCK7E","FUCK7F",
  115.   "FUCK80","FUCK81","FUCK82","FUCK83","FUCK84","FUCK85","FUCK86","FUCK87",
  116.   "FUCK88","FUCK89","FUCK8A","FUCK8B","FUCK8C","FUCK8D","FUCK8E","FUCK8F",
  117.   "FUCK90","FUCK91","FUCK92","FUCK93","FUCK94","FUCK95","FUCK96","FUCK97",
  118.   "FUCK98","FUCK99","FUCK9A","FUCK9B","FUCK9C","FUCK9D","FUCK9E","FUCK9F",
  119.   "LDI","CPI","FUCKA2","FUCKA3","FUCKA4","FUCKA5","FUCKA6","FUCKA7",
  120.   "LDD","CPD","FUCKAA","FUCKAB","FUCKAC","FUCKAD","FUCKAE","FUCKAF",
  121.   "LDIR","CPIR","FUCKB2","FUCKB3","FUCKB4","FUCKB5","FUCKB6","FUCKB7",
  122.   "LDDR","CPDR","FUCKBA","FUCKBB","FUCKBC","FUCKBD","FUCKBE","FUCKBF",
  123.   "FUCKC0","FUCKC1","FUCKC2","FUCKC3","FUCKC4","FUCKC5","FUCKC6","FUCKC7",
  124.   "FUCKC8","FUCKC9","FUCKCA","FUCKCB","FUCKCC","FUCKCD","FUCKCE","FUCKCF",
  125.   "FUCKD0","FUCKD1","FUCKD2","FUCKD3","FUCKD4","FUCKD5","FUCKD6","FUCKD7",
  126.   "FUCKD8","FUCKD9","FUCKDA","FUCKDB","FUCKDC","FUCKDD","FUCKDE","FUCKDF",
  127.   "FUCKE0","FUCKE1","FUCKE2","FUCKE3","FUCKE4","FUCKE5","FUCKE6","FUCKE7",
  128.   "FUCKE8","FUCKE9","FUCKEA","FUCKEB","FUCKEC","FUCKED","FUCKEE","FUCKEF",
  129.   "FUCKF0","FUCKF1","FUCKF2","FUCKF3","FUCKF4","FUCKF5","FUCKF6","FUCKF7",
  130.   "FUCKF8","FUCKF9","FUCKFA","FUCKFB","FUCKFC","FUCKFD","FUCKFE","FUCKFF"
  131. };
  132.  
  133. void HexByte(char *S,byte V)
  134. {
  135.   static char Digits[]="0123456789ABCDEF";
  136.   *S++=Digits[V>>4];*S++=Digits[V&0x0F];*S='\0';
  137. }
  138.  
  139. int DAsm(char *S,byte *A)
  140. {
  141.   char H[3],*T,*P;
  142.   byte *B,J;
  143.  
  144.   B=A;
  145.  
  146.   switch(*B)
  147.   {
  148.     case 0xCB: B++;T=MnemonicsCB[*B++];break;
  149.     case 0xED: B++;T=MnemonicsED[*B++];break;
  150.     default:   T=Mnemonics[*B++];
  151.   }
  152.  
  153.   if(P=strchr(T,'*'))
  154.   {
  155.     strncpy(S,T,P-T);S[P-T]='\0';
  156.     HexByte(H,*B++);strcat(S,H);
  157.     strcat(S,P+1);
  158.   }
  159.   else
  160.     if(P=strchr(T,'@'))
  161.     {
  162.       strncpy(S,T,P-T);S[P-T]='\0';
  163.       strcat(S,*B&0x80? "-":"+");
  164.       J=*B&0x80? 256-*B:*B;B++;
  165.       HexByte(H,J);strcat(S,H);
  166.       strcat(S,P+1);
  167.     }
  168.     else
  169.       if(P=strchr(T,'#'))
  170.       {
  171.         strncpy(S,T,P-T);S[P-T]='\0';
  172.         HexByte(H,*(++B));strcat(S,H);
  173.         HexByte(H,*(B-1));strcat(S,H);
  174.         B++;strcat(S,P+1);
  175.       }
  176.       else strcpy(S,T);
  177.  
  178.   return(B-A);
  179. }
  180.  
  181. /*** Single-step debugger ****************************/
  182. /*** This function should exist if DEBUG is        ***/
  183. /*** #defined. When Trace=TRUE, it is called after ***/
  184. /*** each command executed by the CPU and given    ***/
  185. /*** address of the address space and the register ***/
  186. /*** file.                                         ***/
  187. /*****************************************************/
  188. void Z80_Debug(byte *A,reg R)
  189. {
  190.   char S[128];
  191.   extern byte Trace;
  192.   extern word Trap;
  193.   extern word OldTrap;
  194.   int ch;
  195.  
  196.   DAsm(S,A+R.PC.W);
  197.  
  198.   printf
  199.   (
  200.     "AF:%hX HL:%hX DE:%hX BC:%hX PC:%hX SP:%hX IX:%hX IY:%hX \n",
  201.     R.AF.W,R.HL.W,R.DE.W,R.BC.W,R.PC.W,R.SP.W,R.IX.W,R.IY.W
  202.   );
  203.   printf
  204.   ( 
  205.     "AT PC: [%hX - %s]   AT SP: [%X]\n\n",
  206.     *(A+R.PC.W),S,*(A+R.SP.W)+((word)*(A+R.SP.W+1)<<8)
  207.   );
  208.   printf("Next command (Y/n/r) ? ");
  209.   ch=getchar();
  210.   if (ch == 'n') { Trace=!Trace; Trap=OldTrap; }
  211.   if (ch == 'r')
  212.   {
  213.     printf("Run until adress $");
  214.     scanf("%hx",&Trap);
  215.     Trace=!Trace;
  216.   }
  217.   printf("\n");
  218.   fflush(stdout);
  219. }  
  220.