📄 codes.h
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/** VGB: portable GameBoy emulator ***************************/
/** **/
/** Codes.h **/
/** **/
/** This file contains implementation for the main table of **/
/** Z80 commands. It is included from Z80.c. **/
/** **/
/** Copyright (C) Marat Fayzullin 1994,1995 **/
/** Marcel de Kogel 1996 **/
/** You are not allowed to distribute this software **/
/** commercially. Please, notify me, if you make any **/
/** changes to this file. **/
/*************************************************************/
case 0x08:
J.B.l=M_RDMEM_OPCODE();J.B.h=M_RDMEM_OPCODE();
M_WRMEM(J.W++,R.SP.B.l);M_WRMEM(J.W,R.SP.B.h);
break;
case 0x22: M_WRMEM(R.HL.D,R.AF.B.h);R.HL.W++;break;
case 0x2A: R.AF.B.h=M_RDMEM(R.HL.D);R.HL.W++;break;
case 0x32: M_WRMEM(R.HL.D,R.AF.B.h);R.HL.W--;break;
case 0x3A: R.AF.B.h=M_RDMEM(R.HL.D);R.HL.W--;break;
case 0xD9: R.IFF|=0x01;M_RET;break;
case 0xE0: M_WRMEM(0xFF00+M_RDMEM_OPCODE(),R.AF.B.h);break;
case 0xE2: M_WRMEM(0xFF00+R.BC.B.l,R.AF.B.h);break;
case 0xE8: R.SP.W+=(offset)M_RDMEM_OPCODE();break;
case 0xEA:
J.B.l=M_RDMEM_OPCODE();
J.B.h=M_RDMEM_OPCODE();
M_WRMEM(J.W,R.AF.B.h);
break;
case 0xF0: R.AF.B.h=M_RDMEM(0xFF00+M_RDMEM_OPCODE());break;
case 0xF2: R.AF.B.h=M_RDMEM(0xFF00+R.BC.B.l);break;
case 0xF8: R.HL.W=R.SP.W+(offset)M_RDMEM_OPCODE();break;
case 0xFA:
J.B.l=M_RDMEM_OPCODE();
J.B.h=M_RDMEM_OPCODE();
R.AF.B.h=M_RDMEM(J.W);
break;
case JR_NZ: if(R.AF.B.l&Z_FLAG) R.PC.W++; else { M_JR; } break;
case JR_NC: if(R.AF.B.l&C_FLAG) R.PC.W++; else { M_JR; } break;
case JR_Z: if(R.AF.B.l&Z_FLAG) { M_JR; } else R.PC.W++; break;
case JR_C: if(R.AF.B.l&C_FLAG) { M_JR; } else R.PC.W++; break;
case JP_NZ: if(R.AF.B.l&Z_FLAG) R.PC.W+=2; else { M_JP; } break;
case JP_NC: if(R.AF.B.l&C_FLAG) R.PC.W+=2; else { M_JP; } break;
case JP_Z: if(R.AF.B.l&Z_FLAG) { M_JP; } else R.PC.W+=2; break;
case JP_C: if(R.AF.B.l&C_FLAG) { M_JP; } else R.PC.W+=2; break;
case RET_NZ: if(!(R.AF.B.l&Z_FLAG)) { M_RET; } break;
case RET_NC: if(!(R.AF.B.l&C_FLAG)) { M_RET; } break;
case RET_Z: if(R.AF.B.l&Z_FLAG) { M_RET; } break;
case RET_C: if(R.AF.B.l&C_FLAG) { M_RET; } break;
case CALL_NZ: if(R.AF.B.l&Z_FLAG) R.PC.W+=2; else { M_CALL; } break;
case CALL_NC: if(R.AF.B.l&C_FLAG) R.PC.W+=2; else { M_CALL; } break;
case CALL_Z: if(R.AF.B.l&Z_FLAG) { M_CALL; } else R.PC.W+=2; break;
case CALL_C: if(R.AF.B.l&C_FLAG) { M_CALL; } else R.PC.W+=2; break;
case ADD_B: M_ADD(R.BC.B.h);break;
case ADD_C: M_ADD(R.BC.B.l);break;
case ADD_D: M_ADD(R.DE.B.h);break;
case ADD_E: M_ADD(R.DE.B.l);break;
case ADD_H: M_ADD(R.HL.B.h);break;
case ADD_L: M_ADD(R.HL.B.l);break;
case ADD_A: M_ADD(R.AF.B.h);break;
case ADD_xHL: I=M_RDMEM(R.HL.D);M_ADD(I);break;
case ADD_BYTE: I=M_RDMEM_OPCODE();M_ADD(I);break;
case SUB_B: M_SUB(R.BC.B.h);break;
case SUB_C: M_SUB(R.BC.B.l);break;
case SUB_D: M_SUB(R.DE.B.h);break;
case SUB_E: M_SUB(R.DE.B.l);break;
case SUB_H: M_SUB(R.HL.B.h);break;
case SUB_L: M_SUB(R.HL.B.l);break;
case SUB_A: R.AF.B.h=0;R.AF.B.l=N_FLAG|Z_FLAG;break;
case SUB_xHL: I=M_RDMEM(R.HL.D);M_SUB(I);break;
case SUB_BYTE: I=M_RDMEM_OPCODE();M_SUB(I);break;
case AND_B: M_AND(R.BC.B.h);break;
case AND_C: M_AND(R.BC.B.l);break;
case AND_D: M_AND(R.DE.B.h);break;
case AND_E: M_AND(R.DE.B.l);break;
case AND_H: M_AND(R.HL.B.h);break;
case AND_L: M_AND(R.HL.B.l);break;
case AND_A: M_AND(R.AF.B.h);break;
case AND_xHL: I=M_RDMEM(R.HL.D);M_AND(I);break;
case AND_BYTE: I=M_RDMEM_OPCODE();M_AND(I);break;
case OR_B: M_OR(R.BC.B.h);break;
case OR_C: M_OR(R.BC.B.l);break;
case OR_D: M_OR(R.DE.B.h);break;
case OR_E: M_OR(R.DE.B.l);break;
case OR_H: M_OR(R.HL.B.h);break;
case OR_L: M_OR(R.HL.B.l);break;
case OR_A: M_OR(R.AF.B.h);break;
case OR_xHL: I=M_RDMEM(R.HL.D);M_OR(I);break;
case OR_BYTE: I=M_RDMEM_OPCODE();M_OR(I);break;
case ADC_B: M_ADC(R.BC.B.h);break;
case ADC_C: M_ADC(R.BC.B.l);break;
case ADC_D: M_ADC(R.DE.B.h);break;
case ADC_E: M_ADC(R.DE.B.l);break;
case ADC_H: M_ADC(R.HL.B.h);break;
case ADC_L: M_ADC(R.HL.B.l);break;
case ADC_A: M_ADC(R.AF.B.h);break;
case ADC_xHL: I=M_RDMEM(R.HL.D);M_ADC(I);break;
case ADC_BYTE: I=M_RDMEM_OPCODE();M_ADC(I);break;
case SBC_B: M_SBC(R.BC.B.h);break;
case SBC_C: M_SBC(R.BC.B.l);break;
case SBC_D: M_SBC(R.DE.B.h);break;
case SBC_E: M_SBC(R.DE.B.l);break;
case SBC_H: M_SBC(R.HL.B.h);break;
case SBC_L: M_SBC(R.HL.B.l);break;
case SBC_A: M_SBC(R.AF.B.h);break;
case SBC_xHL: I=M_RDMEM(R.HL.D);M_SBC(I);break;
case SBC_BYTE: I=M_RDMEM_OPCODE();M_SBC(I);break;
case XOR_B: M_XOR(R.BC.B.h);break;
case XOR_C: M_XOR(R.BC.B.l);break;
case XOR_D: M_XOR(R.DE.B.h);break;
case XOR_E: M_XOR(R.DE.B.l);break;
case XOR_H: M_XOR(R.HL.B.h);break;
case XOR_L: M_XOR(R.HL.B.l);break;
case XOR_A: R.AF.B.h=0;R.AF.B.l=Z_FLAG;break;
case XOR_xHL: I=M_RDMEM(R.HL.D);M_XOR(I);break;
case XOR_BYTE: I=M_RDMEM_OPCODE();M_XOR(I);break;
case CP_B: M_CP(R.BC.B.h);break;
case CP_C: M_CP(R.BC.B.l);break;
case CP_D: M_CP(R.DE.B.h);break;
case CP_E: M_CP(R.DE.B.l);break;
case CP_H: M_CP(R.HL.B.h);break;
case CP_L: M_CP(R.HL.B.l);break;
case CP_A: R.AF.B.l=N_FLAG|Z_FLAG;break;
case CP_xHL: I=M_RDMEM(R.HL.D);M_CP(I);break;
case CP_BYTE: I=M_RDMEM_OPCODE();M_CP(I);break;
case LD_BC_WORD: M_LDWORD(BC);break;
case LD_DE_WORD: M_LDWORD(DE);break;
case LD_HL_WORD: M_LDWORD(HL);break;
case LD_SP_WORD: M_LDWORD(SP);break;
case LD_PC_HL: R.PC.W=R.HL.W;break;
case LD_SP_HL: R.SP.W=R.HL.W;break;
case LD_A_xBC: R.AF.B.h=M_RDMEM(R.BC.D);break;
case LD_A_xDE: R.AF.B.h=M_RDMEM(R.DE.D);break;
case ADD_HL_BC: M_ADDW(HL,BC);break;
case ADD_HL_DE: M_ADDW(HL,DE);break;
case ADD_HL_HL: M_ADDW(HL,HL);break;
case ADD_HL_SP: M_ADDW(HL,SP);break;
case DEC_BC: R.BC.W--;break;
case DEC_DE: R.DE.W--;break;
case DEC_HL: R.HL.W--;break;
case DEC_SP: R.SP.W--;break;
case INC_BC: R.BC.W++;break;
case INC_DE: R.DE.W++;break;
case INC_HL: R.HL.W++;break;
case INC_SP: R.SP.W++;break;
case DEC_B: M_DEC(R.BC.B.h);break;
case DEC_C: M_DEC(R.BC.B.l);break;
case DEC_D: M_DEC(R.DE.B.h);break;
case DEC_E: M_DEC(R.DE.B.l);break;
case DEC_H: M_DEC(R.HL.B.h);break;
case DEC_L: M_DEC(R.HL.B.l);break;
case DEC_A: M_DEC(R.AF.B.h);break;
case DEC_xHL: I=M_RDMEM(R.HL.D);M_DEC(I);M_WRMEM(R.HL.D,I);break;
case INC_B: M_INC(R.BC.B.h);break;
case INC_C: M_INC(R.BC.B.l);break;
case INC_D: M_INC(R.DE.B.h);break;
case INC_E: M_INC(R.DE.B.l);break;
case INC_H: M_INC(R.HL.B.h);break;
case INC_L: M_INC(R.HL.B.l);break;
case INC_A: M_INC(R.AF.B.h);break;
case INC_xHL: I=M_RDMEM(R.HL.D);M_INC(I);M_WRMEM(R.HL.D,I);break;
case RLCA:
I=R.AF.B.h&0x80? C_FLAG:0;
R.AF.B.h=(R.AF.B.h<<1)|I;
R.AF.B.l=(R.AF.B.l&~(C_FLAG|N_FLAG|H_FLAG))|I;
break;
case RLA:
I=R.AF.B.h&0x80? C_FLAG:0;
R.AF.B.h=(R.AF.B.h<<1)|(R.AF.B.l&C_FLAG);
R.AF.B.l=(R.AF.B.l&~(C_FLAG|N_FLAG|H_FLAG))|I;
break;
case RRCA:
I=R.AF.B.h&0x01;
R.AF.B.h=(R.AF.B.h>>1)|(I? 0x80:0);
R.AF.B.l=(R.AF.B.l&~(C_FLAG|N_FLAG|H_FLAG))|I;
break;
case RRA:
I=R.AF.B.h&0x01;
R.AF.B.h=(R.AF.B.h>>1)|(R.AF.B.l&C_FLAG? 0x80:0);
R.AF.B.l=(R.AF.B.l&~(C_FLAG|N_FLAG|H_FLAG))|I;
break;
case RST00: M_RST(0x0000);break;
case RST08: M_RST(0x0008);break;
case RST10: M_RST(0x0010);break;
case RST18: M_RST(0x0018);break;
case RST20: M_RST(0x0020);break;
case RST28: M_RST(0x0028);break;
case RST30: M_RST(0x0030);break;
case RST38: M_RST(0x0038);break;
case PUSH_BC: M_PUSH(BC);break;
case PUSH_DE: M_PUSH(DE);break;
case PUSH_HL: M_PUSH(HL);break;
case PUSH_AF: --R.SP.W;M_WRMEM(R.SP.D,R.AF.B.h);
--R.SP.W;M_WRMEM(R.SP.D,Z80toGB[R.AF.B.l]);
break;
case POP_BC: M_POP(BC);break;
case POP_DE: M_POP(DE);break;
case POP_HL: M_POP(HL);break;
case POP_AF: R.AF.B.l=GBtoZ80[M_RDMEM(R.SP.D)];R.SP.W++;
R.AF.B.h=M_RDMEM(R.SP.D);R.SP.W++;
break;
case JP: M_JP;break;
case JR: M_JR;break;
case CALL: M_CALL;break;
case RET: M_RET;break;
case SCF: S(C_FLAG);R(N_FLAG|H_FLAG);break;
case CPL: R.AF.B.h=~R.AF.B.h;S(N_FLAG|H_FLAG);break;
case NOP: break;
case EI: R.IFF|=0x01;break;
case DI: R.IFF&=0xFE;break;
case CCF:
R.AF.B.l^=C_FLAG;R(N_FLAG|H_FLAG);
R.AF.B.l|=R.AF.B.l&C_FLAG? 0:H_FLAG;
break;
case LD_B_B: R.BC.B.h=R.BC.B.h;break;
case LD_C_B: R.BC.B.l=R.BC.B.h;break;
case LD_D_B: R.DE.B.h=R.BC.B.h;break;
case LD_E_B: R.DE.B.l=R.BC.B.h;break;
case LD_H_B: R.HL.B.h=R.BC.B.h;break;
case LD_L_B: R.HL.B.l=R.BC.B.h;break;
case LD_A_B: R.AF.B.h=R.BC.B.h;break;
case LD_xHL_B: M_WRMEM(R.HL.D,R.BC.B.h);break;
case LD_B_C: R.BC.B.h=R.BC.B.l;break;
case LD_C_C: R.BC.B.l=R.BC.B.l;break;
case LD_D_C: R.DE.B.h=R.BC.B.l;break;
case LD_E_C: R.DE.B.l=R.BC.B.l;break;
case LD_H_C: R.HL.B.h=R.BC.B.l;break;
case LD_L_C: R.HL.B.l=R.BC.B.l;break;
case LD_A_C: R.AF.B.h=R.BC.B.l;break;
case LD_xHL_C: M_WRMEM(R.HL.D,R.BC.B.l);break;
case LD_B_D: R.BC.B.h=R.DE.B.h;break;
case LD_C_D: R.BC.B.l=R.DE.B.h;break;
case LD_D_D: R.DE.B.h=R.DE.B.h;break;
case LD_E_D: R.DE.B.l=R.DE.B.h;break;
case LD_H_D: R.HL.B.h=R.DE.B.h;break;
case LD_L_D: R.HL.B.l=R.DE.B.h;break;
case LD_A_D: R.AF.B.h=R.DE.B.h;break;
case LD_xHL_D: M_WRMEM(R.HL.D,R.DE.B.h);break;
case LD_B_E: R.BC.B.h=R.DE.B.l;break;
case LD_C_E: R.BC.B.l=R.DE.B.l;break;
case LD_D_E: R.DE.B.h=R.DE.B.l;break;
case LD_E_E: R.DE.B.l=R.DE.B.l;break;
case LD_H_E: R.HL.B.h=R.DE.B.l;break;
case LD_L_E: R.HL.B.l=R.DE.B.l;break;
case LD_A_E: R.AF.B.h=R.DE.B.l;break;
case LD_xHL_E: M_WRMEM(R.HL.D,R.DE.B.l);break;
case LD_B_H: R.BC.B.h=R.HL.B.h;break;
case LD_C_H: R.BC.B.l=R.HL.B.h;break;
case LD_D_H: R.DE.B.h=R.HL.B.h;break;
case LD_E_H: R.DE.B.l=R.HL.B.h;break;
case LD_H_H: R.HL.B.h=R.HL.B.h;break;
case LD_L_H: R.HL.B.l=R.HL.B.h;break;
case LD_A_H: R.AF.B.h=R.HL.B.h;break;
case LD_xHL_H: M_WRMEM(R.HL.D,R.HL.B.h);break;
case LD_B_L: R.BC.B.h=R.HL.B.l;break;
case LD_C_L: R.BC.B.l=R.HL.B.l;break;
case LD_D_L: R.DE.B.h=R.HL.B.l;break;
case LD_E_L: R.DE.B.l=R.HL.B.l;break;
case LD_H_L: R.HL.B.h=R.HL.B.l;break;
case LD_L_L: R.HL.B.l=R.HL.B.l;break;
case LD_A_L: R.AF.B.h=R.HL.B.l;break;
case LD_xHL_L: M_WRMEM(R.HL.D,R.HL.B.l);break;
case LD_B_A: R.BC.B.h=R.AF.B.h;break;
case LD_C_A: R.BC.B.l=R.AF.B.h;break;
case LD_D_A: R.DE.B.h=R.AF.B.h;break;
case LD_E_A: R.DE.B.l=R.AF.B.h;break;
case LD_H_A: R.HL.B.h=R.AF.B.h;break;
case LD_L_A: R.HL.B.l=R.AF.B.h;break;
case LD_A_A: R.AF.B.h=R.AF.B.h;break;
case LD_xHL_A: M_WRMEM(R.HL.D,R.AF.B.h);break;
case LD_xBC_A: M_WRMEM(R.BC.D,R.AF.B.h);break;
case LD_xDE_A: M_WRMEM(R.DE.D,R.AF.B.h);break;
case LD_B_xHL: R.BC.B.h=M_RDMEM(R.HL.D);break;
case LD_C_xHL: R.BC.B.l=M_RDMEM(R.HL.D);break;
case LD_D_xHL: R.DE.B.h=M_RDMEM(R.HL.D);break;
case LD_E_xHL: R.DE.B.l=M_RDMEM(R.HL.D);break;
case LD_H_xHL: R.HL.B.h=M_RDMEM(R.HL.D);break;
case LD_L_xHL: R.HL.B.l=M_RDMEM(R.HL.D);break;
case LD_A_xHL: R.AF.B.h=M_RDMEM(R.HL.D);break;
case LD_B_BYTE: R.BC.B.h=M_RDMEM_OPCODE();break;
case LD_C_BYTE: R.BC.B.l=M_RDMEM_OPCODE();break;
case LD_D_BYTE: R.DE.B.h=M_RDMEM_OPCODE();break;
case LD_E_BYTE: R.DE.B.l=M_RDMEM_OPCODE();break;
case LD_H_BYTE: R.HL.B.h=M_RDMEM_OPCODE();break;
case LD_L_BYTE: R.HL.B.l=M_RDMEM_OPCODE();break;
case LD_A_BYTE: R.AF.B.h=M_RDMEM_OPCODE();break;
case LD_xHL_BYTE: M_WRMEM(R.HL.D,M_RDMEM_OPCODE());break;
case EX_HL_xSP:
J.B.l=M_RDMEM(R.SP.D);M_WRMEM(R.SP.D,R.HL.B.l);R.SP.W++;
J.B.h=M_RDMEM(R.SP.D);M_WRMEM(R.SP.D,R.HL.B.h);R.SP.W--;
R.HL.W=J.W;
break;
case DAA:
J.B.h=R.AF.B.h&0x0F;
J.W=(R.AF.B.l&N_FLAG)?
(
(R.AF.B.l&C_FLAG)?
(((R.AF.B.l&H_FLAG)? 0x9A00:0xA000)+C_FLAG):
((R.AF.B.l&H_FLAG)? 0xFA00:0x0000)
)
:
(
(R.AF.B.l&C_FLAG)?
(((R.AF.B.l&H_FLAG)? 0x6600:((J.B.h<0x0A)? 0x6000:0x6600))+C_FLAG):
(
(R.AF.B.l&H_FLAG)?
((R.AF.B.h<0xA0)? 0x0600:(0x6600+C_FLAG)):
(
(J.B.h<0x0A)?
((R.AF.B.h<0xA0)? 0x0000:(0x6000+C_FLAG)):
((R.AF.B.h<0x90)? 0x0600:(0x6600+C_FLAG))
)
)
);
R.AF.B.h+=J.B.h;
FLAGS(R.AF.B.h,J.B.l|(R.AF.B.l&N_FLAG));
break;
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