282 lines
6.9 KiB
C
282 lines
6.9 KiB
C
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/** Z80: portable Z80 emulator *******************************/
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/** **/
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/** CodesED.h **/
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/** **/
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/** This file contains implementation for the ED table of **/
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/** Z80 commands. It is included from Z80.c. **/
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/** **/
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/** Copyright (C) Marat Fayzullin 1994,1995,1996,1997 **/
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/** You are not allowed to distribute this software **/
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/** commercially. Please, notify me, if you make any **/
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/** changes to this file. **/
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/*************************************************************/
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/** This is a special patch for emulating BIOS calls: ********/
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case DB_FE: PatchZ80(R);break;
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/*************************************************************/
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case ADC_HL_BC: M_ADCW(BC);break;
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case ADC_HL_DE: M_ADCW(DE);break;
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case ADC_HL_HL: M_ADCW(HL);break;
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case ADC_HL_SP: M_ADCW(SP);break;
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case SBC_HL_BC: M_SBCW(BC);break;
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case SBC_HL_DE: M_SBCW(DE);break;
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case SBC_HL_HL: M_SBCW(HL);break;
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case SBC_HL_SP: M_SBCW(SP);break;
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case LD_xWORDe_HL:
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J.B.l=RdZ80(R->PC.W++);
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J.B.h=RdZ80(R->PC.W++);
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WrZ80(J.W++,R->HL.B.l);
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WrZ80(J.W,R->HL.B.h);
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break;
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case LD_xWORDe_DE:
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J.B.l=RdZ80(R->PC.W++);
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J.B.h=RdZ80(R->PC.W++);
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WrZ80(J.W++,R->DE.B.l);
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WrZ80(J.W,R->DE.B.h);
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break;
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case LD_xWORDe_BC:
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J.B.l=RdZ80(R->PC.W++);
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J.B.h=RdZ80(R->PC.W++);
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WrZ80(J.W++,R->BC.B.l);
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WrZ80(J.W,R->BC.B.h);
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break;
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case LD_xWORDe_SP:
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J.B.l=RdZ80(R->PC.W++);
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J.B.h=RdZ80(R->PC.W++);
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WrZ80(J.W++,R->SP.B.l);
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WrZ80(J.W,R->SP.B.h);
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break;
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case LD_HL_xWORDe:
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J.B.l=RdZ80(R->PC.W++);
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J.B.h=RdZ80(R->PC.W++);
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R->HL.B.l=RdZ80(J.W++);
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R->HL.B.h=RdZ80(J.W);
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break;
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case LD_DE_xWORDe:
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J.B.l=RdZ80(R->PC.W++);
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J.B.h=RdZ80(R->PC.W++);
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R->DE.B.l=RdZ80(J.W++);
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R->DE.B.h=RdZ80(J.W);
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break;
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case LD_BC_xWORDe:
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J.B.l=RdZ80(R->PC.W++);
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J.B.h=RdZ80(R->PC.W++);
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R->BC.B.l=RdZ80(J.W++);
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R->BC.B.h=RdZ80(J.W);
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break;
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case LD_SP_xWORDe:
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J.B.l=RdZ80(R->PC.W++);
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J.B.h=RdZ80(R->PC.W++);
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R->SP.B.l=RdZ80(J.W++);
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R->SP.B.h=RdZ80(J.W);
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break;
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case RRD:
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I=RdZ80(R->HL.W);
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J.B.l=(I>>4)|(R->AF.B.h<<4);
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WrZ80(R->HL.W,J.B.l);
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R->AF.B.h=(I&0x0F)|(R->AF.B.h&0xF0);
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R->AF.B.l=PZSTable[R->AF.B.h]|(R->AF.B.l&C_FLAG);
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break;
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case RLD:
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I=RdZ80(R->HL.W);
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J.B.l=(I<<4)|(R->AF.B.h&0x0F);
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WrZ80(R->HL.W,J.B.l);
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R->AF.B.h=(I>>4)|(R->AF.B.h&0xF0);
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R->AF.B.l=PZSTable[R->AF.B.h]|(R->AF.B.l&C_FLAG);
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break;
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case LD_A_I:
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R->AF.B.h=R->I;
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R->AF.B.l=(R->AF.B.l&C_FLAG)|(R->IFF&1? P_FLAG:0)|ZSTable[R->AF.B.h];
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break;
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case LD_A_R:
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R->AF.B.h=(byte)(-R->ICount&0xFF);
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R->AF.B.l=(R->AF.B.l&C_FLAG)|(R->IFF&1? P_FLAG:0)|ZSTable[R->AF.B.h];
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break;
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case LD_I_A: R->I=R->AF.B.h;break;
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case LD_R_A: break;
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case IM_0: R->IFF&=0xF9;break;
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case IM_1: R->IFF=(R->IFF&0xF9)|2;break;
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case IM_2: R->IFF=(R->IFF&0xF9)|4;break;
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case RETI: M_RET;break;
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case RETN: if(R->IFF&0x40) R->IFF|=0x01; else R->IFF&=0xFE;
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M_RET;break;
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case NEG: I=R->AF.B.h;R->AF.B.h=0;M_SUB(I);break;
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case IN_B_xC: M_IN(R->BC.B.h);break;
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case IN_C_xC: M_IN(R->BC.B.l);break;
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case IN_D_xC: M_IN(R->DE.B.h);break;
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case IN_E_xC: M_IN(R->DE.B.l);break;
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case IN_H_xC: M_IN(R->HL.B.h);break;
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case IN_L_xC: M_IN(R->HL.B.l);break;
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case IN_A_xC: M_IN(R->AF.B.h);break;
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case IN_F_xC: M_IN(J.B.l);break;
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case OUT_xC_B: OutZ80(R->BC.B.l,R->BC.B.h);break;
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case OUT_xC_C: OutZ80(R->BC.B.l,R->BC.B.l);break;
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case OUT_xC_D: OutZ80(R->BC.B.l,R->DE.B.h);break;
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case OUT_xC_E: OutZ80(R->BC.B.l,R->DE.B.l);break;
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case OUT_xC_H: OutZ80(R->BC.B.l,R->HL.B.h);break;
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case OUT_xC_L: OutZ80(R->BC.B.l,R->HL.B.l);break;
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case OUT_xC_A: OutZ80(R->BC.B.l,R->AF.B.h);break;
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case INI:
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WrZ80(R->HL.W++,InZ80(R->BC.B.l));
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R->BC.B.h--;
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R->AF.B.l=N_FLAG|(R->BC.B.h? 0:Z_FLAG);
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break;
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case INIR:
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do
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{
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WrZ80(R->HL.W++,InZ80(R->BC.B.l));
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R->BC.B.h--;R->ICount-=21;
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}
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while(R->BC.B.h&&(R->ICount>0));
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if(R->BC.B.h) { R->AF.B.l=N_FLAG;R->PC.W-=2; }
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else { R->AF.B.l=Z_FLAG|N_FLAG;R->ICount+=5; }
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break;
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case IND:
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WrZ80(R->HL.W--,InZ80(R->BC.B.l));
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R->BC.B.h--;
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R->AF.B.l=N_FLAG|(R->BC.B.h? 0:Z_FLAG);
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break;
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case INDR:
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do
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{
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WrZ80(R->HL.W--,InZ80(R->BC.B.l));
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R->BC.B.h--;R->ICount-=21;
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}
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while(R->BC.B.h&&(R->ICount>0));
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if(R->BC.B.h) { R->AF.B.l=N_FLAG;R->PC.W-=2; }
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else { R->AF.B.l=Z_FLAG|N_FLAG;R->ICount+=5; }
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break;
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case OUTI:
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OutZ80(R->BC.B.l,RdZ80(R->HL.W++));
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R->BC.B.h--;
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R->AF.B.l=N_FLAG|(R->BC.B.h? 0:Z_FLAG);
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break;
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case OTIR:
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do
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{
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OutZ80(R->BC.B.l,RdZ80(R->HL.W++));
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R->BC.B.h--;R->ICount-=21;
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}
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while(R->BC.B.h&&(R->ICount>0));
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if(R->BC.B.h) { R->AF.B.l=N_FLAG;R->PC.W-=2; }
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else { R->AF.B.l=Z_FLAG|N_FLAG;R->ICount+=5; }
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break;
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case OUTD:
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OutZ80(R->BC.B.l,RdZ80(R->HL.W--));
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R->BC.B.h--;
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R->AF.B.l=N_FLAG|(R->BC.B.h? 0:Z_FLAG);
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break;
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case OTDR:
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do
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{
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OutZ80(R->BC.B.l,RdZ80(R->HL.W--));
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R->BC.B.h--;R->ICount-=21;
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}
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while(R->BC.B.h&&(R->ICount>0));
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if(R->BC.B.h) { R->AF.B.l=N_FLAG;R->PC.W-=2; }
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else { R->AF.B.l=Z_FLAG|N_FLAG;R->ICount+=5; }
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break;
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case LDI:
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WrZ80(R->DE.W++,RdZ80(R->HL.W++));
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R->BC.W--;
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R->AF.B.l=(R->AF.B.l&~(N_FLAG|H_FLAG|P_FLAG))|(R->BC.W? P_FLAG:0);
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break;
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case LDIR:
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do
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{
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WrZ80(R->DE.W++,RdZ80(R->HL.W++));
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R->BC.W--;R->ICount-=21;
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}
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while(R->BC.W&&(R->ICount>0));
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R->AF.B.l&=~(N_FLAG|H_FLAG|P_FLAG);
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if(R->BC.W) { R->AF.B.l|=N_FLAG;R->PC.W-=2; }
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else R->ICount+=5;
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break;
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case LDD:
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WrZ80(R->DE.W--,RdZ80(R->HL.W--));
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R->BC.W--;
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R->AF.B.l=(R->AF.B.l&~(N_FLAG|H_FLAG|P_FLAG))|(R->BC.W? P_FLAG:0);
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break;
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case LDDR:
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do
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{
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WrZ80(R->DE.W--,RdZ80(R->HL.W--));
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R->BC.W--;R->ICount-=21;
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}
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while(R->BC.W&&(R->ICount>0));
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R->AF.B.l&=~(N_FLAG|H_FLAG|P_FLAG);
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if(R->BC.W) { R->AF.B.l|=N_FLAG;R->PC.W-=2; }
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else R->ICount+=5;
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break;
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case CPI:
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I=RdZ80(R->HL.W++);
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J.B.l=R->AF.B.h-I;
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R->BC.W--;
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R->AF.B.l =
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N_FLAG|(R->AF.B.l&C_FLAG)|ZSTable[J.B.l]|
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((R->AF.B.h^I^J.B.l)&H_FLAG)|(R->BC.W? P_FLAG:0);
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break;
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case CPIR:
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do
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{
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I=RdZ80(R->HL.W++);
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J.B.l=R->AF.B.h-I;
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R->BC.W--;R->ICount-=21;
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}
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while(R->BC.W&&J.B.l&&(R->ICount>0));
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R->AF.B.l =
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N_FLAG|(R->AF.B.l&C_FLAG)|ZSTable[J.B.l]|
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((R->AF.B.h^I^J.B.l)&H_FLAG)|(R->BC.W? P_FLAG:0);
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if(R->BC.W&&J.B.l) R->PC.W-=2; else R->ICount+=5;
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break;
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case CPD:
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I=RdZ80(R->HL.W--);
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J.B.l=R->AF.B.h-I;
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R->BC.W--;
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R->AF.B.l =
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N_FLAG|(R->AF.B.l&C_FLAG)|ZSTable[J.B.l]|
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((R->AF.B.h^I^J.B.l)&H_FLAG)|(R->BC.W? P_FLAG:0);
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break;
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case CPDR:
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do
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{
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I=RdZ80(R->HL.W--);
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J.B.l=R->AF.B.h-I;
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R->BC.W--;R->ICount-=21;
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}
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while(R->BC.W&&J.B.l);
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R->AF.B.l =
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N_FLAG|(R->AF.B.l&C_FLAG)|ZSTable[J.B.l]|
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((R->AF.B.h^I^J.B.l)&H_FLAG)|(R->BC.W? P_FLAG:0);
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if(R->BC.W&&J.B.l) R->PC.W-=2; else R->ICount+=5;
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break;
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