MAIN: // check interrupt lines switch(get_pending_interrupt()) { case VECTOR_NMI: goto NMI; case VECTOR_FIRQ: goto FIRQ; case VECTOR_IRQ: goto IRQ; } // debugger hook m_ppc = m_pc; debugger_instruction_hook(this, m_pc.w); // opcode fetch m_lic_func(ASSERT_LINE); @m_opcode = read_opcode(); m_lic_func(CLEAR_LINE); // burn delay loops burn_any_delay_loops(); // dispatch opcode switch(m_opcode) { case 0x00: case 0x01: %DIRECT; %NEG8; return; case 0x03: case 0x02: %DIRECT; %COM8; return; case 0x04: case 0x05: %DIRECT; %LSR8; return; case 0x06: %DIRECT; %ROR8; return; case 0x07: %DIRECT; %ASR8; return; case 0x08: %DIRECT; %ASL8; return; case 0x09: %DIRECT; %ROL8; return; case 0x0A: case 0x0B: %DIRECT; %DEC8; return; case 0x0C: %DIRECT; %INC8; return; case 0x0D: %DIRECT; %TST8; return; case 0x0E: %DIRECT; %JMP; return; case 0x0F: %DIRECT; %CLR8; return; case 0x10: %DISPATCH10; return; case 0x11: %DISPATCH11; return; case 0x12: %NOP; return; case 0x13: %SYNC; return; case 0x16: set_cond(true); %LBRANCH; return; case 0x17: %LBSR; return; case 0x19: %DAA; return; case 0x1A: set_imm(); %ORCC; return; case 0x1C: set_imm(); %ANDCC; return; case 0x1D: %SEX; return; case 0x1E: %EXG; return; case 0x1F: %TFR; return; case 0x20: set_cond(true); %BRANCH; return; case 0x21: set_cond(false); %BRANCH; return; case 0x22: set_cond(cond_hi()); %BRANCH; return; case 0x23: set_cond(!cond_hi()); %BRANCH; return; case 0x24: set_cond(cond_cc()); %BRANCH; return; case 0x25: set_cond(!cond_cc()); %BRANCH; return; case 0x26: set_cond(cond_ne()); %BRANCH; return; case 0x27: set_cond(!cond_ne()); %BRANCH; return; case 0x28: set_cond(cond_vc()); %BRANCH; return; case 0x29: set_cond(!cond_vc()); %BRANCH; return; case 0x2A: set_cond(cond_pl()); %BRANCH; return; case 0x2B: set_cond(!cond_pl()); %BRANCH; return; case 0x2C: set_cond(cond_ge()); %BRANCH; return; case 0x2D: set_cond(!cond_ge()); %BRANCH; return; case 0x2E: set_cond(cond_gt()); %BRANCH; return; case 0x2F: set_cond(!cond_gt()); %BRANCH; return; case 0x30: set_regop16(m_x); %INDEXED; %LEA_xy; return; case 0x31: set_regop16(m_y); %INDEXED; %LEA_xy; return; case 0x32: set_regop16(m_s); %INDEXED; %LEA_us; return; case 0x33: set_regop16(m_u); %INDEXED; %LEA_us; return; case 0x34: %PSHS; return; case 0x35: %PULS; return; case 0x36: %PSHU; return; case 0x37: %PULU; return; case 0x39: %RTS; return; case 0x3A: %ABX; return; case 0x3B: %RTI; return; case 0x3C: %CWAI; return; case 0x3D: %MUL; return; case 0x3F: %SWI; return; case 0x40: case 0x41: set_a(); %NEG8; return; case 0x43: case 0x42: set_a(); %COM8; return; case 0x44: case 0x45: set_a(); %LSR8; return; case 0x46: set_a(); %ROR8; return; case 0x47: set_a(); %ASR8; return; case 0x48: set_a(); %ASL8; return; case 0x49: set_a(); %ROL8; return; case 0x4A: case 0x4B: set_a(); %DEC8; return; case 0x4C: set_a(); %INC8; return; case 0x4D: set_a(); %TST8; return; case 0x4E: set_a(); %JMP; return; case 0x4F: set_a(); %CLR8; return; case 0x50: case 0x51: set_b(); %NEG8; return; case 0x53: case 0x52: set_b(); %COM8; return; case 0x54: case 0x55: set_b(); %LSR8; return; case 0x56: set_b(); %ROR8; return; case 0x57: set_b(); %ASR8; return; case 0x58: set_b(); %ASL8; return; case 0x59: set_b(); %ROL8; return; case 0x5A: case 0x5B: set_b(); %DEC8; return; case 0x5C: set_b(); %INC8; return; case 0x5D: set_b(); %TST8; return; case 0x5E: set_b(); %JMP; return; case 0x5F: set_b(); %CLR8; return; case 0x60: case 0x61: %INDEXED; %NEG8; return; case 0x63: case 0x62: %INDEXED; %COM8; return; case 0x64: case 0x65: %INDEXED; %LSR8; return; case 0x66: %INDEXED; %ROR8; return; case 0x67: %INDEXED; %ASR8; return; case 0x68: %INDEXED; %ASL8; return; case 0x69: %INDEXED; %ROL8; return; case 0x6A: case 0x6B: %INDEXED; %DEC8; return; case 0x6C: %INDEXED; %INC8; return; case 0x6D: %INDEXED; %TST8; return; case 0x6E: %INDEXED; %JMP; return; case 0x6F: %INDEXED; %CLR8; return; case 0x70: case 0x71: %EXTENDED; %NEG8; return; case 0x73: case 0x72: %EXTENDED; %COM8; return; case 0x74: case 0x75: %EXTENDED; %LSR8; return; case 0x76: %EXTENDED; %ROR8; return; case 0x77: %EXTENDED; %ASR8; return; case 0x78: %EXTENDED; %ASL8; return; case 0x79: %EXTENDED; %ROL8; return; case 0x7A: case 0x7B: %EXTENDED; %DEC8; return; case 0x7C: %EXTENDED; %INC8; return; case 0x7D: %EXTENDED; %TST8; return; case 0x7E: %EXTENDED; %JMP; return; case 0x7F: %EXTENDED; %CLR8; return; case 0x80: set_regop8(m_d.b.h); set_imm(); %SUB8; return; case 0x81: set_regop8(m_d.b.h); set_imm(); %CMP8; return; case 0x82: set_regop8(m_d.b.h); set_imm(); %SBC8; return; case 0x83: set_regop16(m_d); set_imm(); %SUB16; return; case 0x84: set_regop8(m_d.b.h); set_imm(); %AND8; return; case 0x85: set_regop8(m_d.b.h); set_imm(); %BIT8; return; case 0x86: set_regop8(m_d.b.h); set_imm(); %LD8; return; case 0x87: set_regop8(m_d.b.h); set_imm(); %ST8; return; case 0x88: set_regop8(m_d.b.h); set_imm(); %EOR8; return; case 0x89: set_regop8(m_d.b.h); set_imm(); %ADC8; return; case 0x8A: set_regop8(m_d.b.h); set_imm(); %OR8; return; case 0x8B: set_regop8(m_d.b.h); set_imm(); %ADD8; return; case 0x8C: set_regop16(m_x); set_imm(); %CMP16; return; case 0x8D: %BSR; return; case 0x8E: set_regop16(m_x); set_imm(); %LD16; return; case 0x8F: set_regop16(m_x); set_imm(); %ST16; return; case 0x90: set_regop8(m_d.b.h); %DIRECT; %SUB8; return; case 0x91: set_regop8(m_d.b.h); %DIRECT; %CMP8; return; case 0x92: set_regop8(m_d.b.h); %DIRECT; %SBC8; return; case 0x93: set_regop16(m_d); %DIRECT; %SUB16; return; case 0x94: set_regop8(m_d.b.h); %DIRECT; %AND8; return; case 0x95: set_regop8(m_d.b.h); %DIRECT; %BIT8; return; case 0x96: set_regop8(m_d.b.h); %DIRECT; %LD8; return; case 0x97: set_regop8(m_d.b.h); %DIRECT; %ST8; return; case 0x98: set_regop8(m_d.b.h); %DIRECT; %EOR8; return; case 0x99: set_regop8(m_d.b.h); %DIRECT; %ADC8; return; case 0x9A: set_regop8(m_d.b.h); %DIRECT; %OR8; return; case 0x9B: set_regop8(m_d.b.h); %DIRECT; %ADD8; return; case 0x9C: set_regop16(m_x); %DIRECT; %CMP16; return; case 0x9D: %DIRECT; %JSR; return; case 0x9E: set_regop16(m_x); %DIRECT; %LD16; return; case 0x9F: set_regop16(m_x); %DIRECT; %ST16; return; case 0xA0: set_regop8(m_d.b.h); %INDEXED; %SUB8; return; case 0xA1: set_regop8(m_d.b.h); %INDEXED; %CMP8; return; case 0xA2: set_regop8(m_d.b.h); %INDEXED; %SBC8; return; case 0xA3: set_regop16(m_d); %INDEXED; %SUB16; return; case 0xA4: set_regop8(m_d.b.h); %INDEXED; %AND8; return; case 0xA5: set_regop8(m_d.b.h); %INDEXED; %BIT8; return; case 0xA6: set_regop8(m_d.b.h); %INDEXED; %LD8; return; case 0xA7: set_regop8(m_d.b.h); %INDEXED; %ST8; return; case 0xA8: set_regop8(m_d.b.h); %INDEXED; %EOR8; return; case 0xA9: set_regop8(m_d.b.h); %INDEXED; %ADC8; return; case 0xAA: set_regop8(m_d.b.h); %INDEXED; %OR8; return; case 0xAB: set_regop8(m_d.b.h); %INDEXED; %ADD8; return; case 0xAC: set_regop16(m_x); %INDEXED; %CMP16; return; case 0xAD: %INDEXED; %JSR; return; case 0xAE: set_regop16(m_x); %INDEXED; %LD16; return; case 0xAF: set_regop16(m_x); %INDEXED; %ST16; return; case 0xB0: set_regop8(m_d.b.h); %EXTENDED; %SUB8; return; case 0xB1: set_regop8(m_d.b.h); %EXTENDED; %CMP8; return; case 0xB2: set_regop8(m_d.b.h); %EXTENDED; %SBC8; return; case 0xB3: set_regop16(m_d); %EXTENDED; %SUB16; return; case 0xB4: set_regop8(m_d.b.h); %EXTENDED; %AND8; return; case 0xB5: set_regop8(m_d.b.h); %EXTENDED; %BIT8; return; case 0xB6: set_regop8(m_d.b.h); %EXTENDED; %LD8; return; case 0xB7: set_regop8(m_d.b.h); %EXTENDED; %ST8; return; case 0xB8: set_regop8(m_d.b.h); %EXTENDED; %EOR8; return; case 0xB9: set_regop8(m_d.b.h); %EXTENDED; %ADC8; return; case 0xBA: set_regop8(m_d.b.h); %EXTENDED; %OR8; return; case 0xBB: set_regop8(m_d.b.h); %EXTENDED; %ADD8; return; case 0xBC: set_regop16(m_x); %EXTENDED; %CMP16; return; case 0xBD: %EXTENDED; %JSR; return; case 0xBE: set_regop16(m_x); %EXTENDED; %LD16; return; case 0xBF: set_regop16(m_x); %EXTENDED; %ST16; return; case 0xC0: set_regop8(m_d.b.l); set_imm(); %SUB8; return; case 0xC1: set_regop8(m_d.b.l); set_imm(); %CMP8; return; case 0xC2: set_regop8(m_d.b.l); set_imm(); %SBC8; return; case 0xC3: set_regop16(m_d); set_imm(); %ADD16; return; case 0xC4: set_regop8(m_d.b.l); set_imm(); %AND8; return; case 0xC5: set_regop8(m_d.b.l); set_imm(); %BIT8; return; case 0xC6: set_regop8(m_d.b.l); set_imm(); %LD8; return; case 0xC7: set_regop8(m_d.b.l); set_imm(); %ST8; return; case 0xC8: set_regop8(m_d.b.l); set_imm(); %EOR8; return; case 0xC9: set_regop8(m_d.b.l); set_imm(); %ADC8; return; case 0xCA: set_regop8(m_d.b.l); set_imm(); %OR8; return; case 0xCB: set_regop8(m_d.b.l); set_imm(); %ADD8; return; case 0xCC: set_regop16(m_d); set_imm(); %LD16; return; case 0xCD: set_regop16(m_d); set_imm(); %ST16; return; case 0xCE: set_regop16(m_u); set_imm(); %LD16; return; case 0xCF: set_regop16(m_u); set_imm(); %ST16; return; case 0xD0: set_regop8(m_d.b.l); %DIRECT; %SUB8; return; case 0xD1: set_regop8(m_d.b.l); %DIRECT; %CMP8; return; case 0xD2: set_regop8(m_d.b.l); %DIRECT; %SBC8; return; case 0xD3: set_regop16(m_d); %DIRECT; %ADD16; return; case 0xD4: set_regop8(m_d.b.l); %DIRECT; %AND8; return; case 0xD5: set_regop8(m_d.b.l); %DIRECT; %BIT8; return; case 0xD6: set_regop8(m_d.b.l); %DIRECT; %LD8; return; case 0xD7: set_regop8(m_d.b.l); %DIRECT; %ST8; return; case 0xD8: set_regop8(m_d.b.l); %DIRECT; %EOR8; return; case 0xD9: set_regop8(m_d.b.l); %DIRECT; %ADC8; return; case 0xDA: set_regop8(m_d.b.l); %DIRECT; %OR8; return; case 0xDB: set_regop8(m_d.b.l); %DIRECT; %ADD8; return; case 0xDC: set_regop16(m_d); %DIRECT; %LD16; return; case 0xDD: set_regop16(m_d); %DIRECT; %ST16; return; case 0xDE: set_regop16(m_u); %DIRECT; %LD16; return; case 0xDF: set_regop16(m_u); %DIRECT; %ST16; return; case 0xE0: set_regop8(m_d.b.l); %INDEXED; %SUB8; return; case 0xE1: set_regop8(m_d.b.l); %INDEXED; %CMP8; return; case 0xE2: set_regop8(m_d.b.l); %INDEXED; %SBC8; return; case 0xE3: set_regop16(m_d); %INDEXED; %ADD16; return; case 0xE4: set_regop8(m_d.b.l); %INDEXED; %AND8; return; case 0xE5: set_regop8(m_d.b.l); %INDEXED; %BIT8; return; case 0xE6: set_regop8(m_d.b.l); %INDEXED; %LD8; return; case 0xE7: set_regop8(m_d.b.l); %INDEXED; %ST8; return; case 0xE8: set_regop8(m_d.b.l); %INDEXED; %EOR8; return; case 0xE9: set_regop8(m_d.b.l); %INDEXED; %ADC8; return; case 0xEA: set_regop8(m_d.b.l); %INDEXED; %OR8; return; case 0xEB: set_regop8(m_d.b.l); %INDEXED; %ADD8; return; case 0xEC: set_regop16(m_d); %INDEXED; %LD16; return; case 0xED: set_regop16(m_d); %INDEXED; %ST16; return; case 0xEE: set_regop16(m_u); %INDEXED; %LD16; return; case 0xEF: set_regop16(m_u); %INDEXED; %ST16; return; case 0xF0: set_regop8(m_d.b.l); %EXTENDED; %SUB8; return; case 0xF1: set_regop8(m_d.b.l); %EXTENDED; %CMP8; return; case 0xF2: set_regop8(m_d.b.l); %EXTENDED; %SBC8; return; case 0xF3: set_regop16(m_d); %EXTENDED; %ADD16; return; case 0xF4: set_regop8(m_d.b.l); %EXTENDED; %AND8; return; case 0xF5: set_regop8(m_d.b.l); %EXTENDED; %BIT8; return; case 0xF6: set_regop8(m_d.b.l); %EXTENDED; %LD8; return; case 0xF7: set_regop8(m_d.b.l); %EXTENDED; %ST8; return; case 0xF8: set_regop8(m_d.b.l); %EXTENDED; %EOR8; return; case 0xF9: set_regop8(m_d.b.l); %EXTENDED; %ADC8; return; case 0xFA: set_regop8(m_d.b.l); %EXTENDED; %OR8; return; case 0xFB: set_regop8(m_d.b.l); %EXTENDED; %ADD8; return; case 0xFC: set_regop16(m_d); %EXTENDED; %LD16; return; case 0xFD: set_regop16(m_d); %EXTENDED; %ST16; return; case 0xFE: set_regop16(m_u); %EXTENDED; %LD16; return; case 0xFF: set_regop16(m_u); %EXTENDED; %ST16; return; default: %ILLEGAL; return; } return; DISPATCH10: @m_opcode = read_opcode(); switch(m_opcode) { case 0x20: set_cond(true); %LBRANCH; return; case 0x21: set_cond(false); %LBRANCH; return; case 0x22: set_cond(cond_hi()); %LBRANCH; return; case 0x23: set_cond(!cond_hi()); %LBRANCH; return; case 0x24: set_cond(cond_cc()); %LBRANCH; return; case 0x25: set_cond(!cond_cc()); %LBRANCH; return; case 0x26: set_cond(cond_ne()); %LBRANCH; return; case 0x27: set_cond(!cond_ne()); %LBRANCH; return; case 0x28: set_cond(cond_vc()); %LBRANCH; return; case 0x29: set_cond(!cond_vc()); %LBRANCH; return; case 0x2A: set_cond(cond_pl()); %LBRANCH; return; case 0x2B: set_cond(!cond_pl()); %LBRANCH; return; case 0x2C: set_cond(cond_ge()); %LBRANCH; return; case 0x2D: set_cond(!cond_ge()); %LBRANCH; return; case 0x2E: set_cond(cond_gt()); %LBRANCH; return; case 0x2F: set_cond(!cond_gt()); %LBRANCH; return; case 0x3F: %SWI2; return; case 0x83: set_regop16(m_d); set_imm(); %CMP16; return; case 0x8C: set_regop16(m_y); set_imm(); %CMP16; return; case 0x8E: set_regop16(m_y); set_imm(); %LD16; return; case 0x8F: set_regop16(m_y); set_imm(); %ST16; return; case 0x93: set_regop16(m_d); %DIRECT; %CMP16; return; case 0x9C: set_regop16(m_y); %DIRECT; %CMP16; return; case 0x9E: set_regop16(m_y); %DIRECT; %LD16; return; case 0x9F: set_regop16(m_y); %DIRECT; %ST16; return; case 0xA3: set_regop16(m_d); %INDEXED; %CMP16; return; case 0xAC: set_regop16(m_y); %INDEXED; %CMP16; return; case 0xAE: set_regop16(m_y); %INDEXED; %LD16; return; case 0xAF: set_regop16(m_y); %INDEXED; %ST16; return; case 0xB3: set_regop16(m_d); %EXTENDED; %CMP16; return; case 0xBC: set_regop16(m_y); %EXTENDED; %CMP16; return; case 0xBE: set_regop16(m_y); %EXTENDED; %LD16; return; case 0xBF: set_regop16(m_y); %EXTENDED; %ST16; return; case 0xCE: set_regop16(m_s); set_imm(); %LD16; return; case 0xCF: set_regop16(m_s); set_imm(); %ST16; return; case 0xDE: set_regop16(m_s); %DIRECT; %LD16; return; case 0xDF: set_regop16(m_s); %DIRECT; %ST16; return; case 0xEE: set_regop16(m_s); %INDEXED; %LD16; return; case 0xEF: set_regop16(m_s); %INDEXED; %ST16; return; case 0xFE: set_regop16(m_s); %EXTENDED; %LD16; return; case 0xFF: set_regop16(m_s); %EXTENDED; %ST16; return; default: %ILLEGAL; return; } return; DISPATCH11: @m_opcode = read_opcode(); switch(m_opcode) { case 0x3F: %SWI3; return; case 0x83: set_regop16(m_u); set_imm(); %CMP16; return; case 0x8C: set_regop16(m_s); set_imm(); %CMP16; return; case 0x93: set_regop16(m_u); %DIRECT; %CMP16; return; case 0x9C: set_regop16(m_s); %DIRECT; %CMP16; return; case 0xA3: set_regop16(m_u); %INDEXED; %CMP16; return; case 0xAC: set_regop16(m_s); %INDEXED; %CMP16; return; case 0xB3: set_regop16(m_u); %EXTENDED; %CMP16; return; case 0xBC: set_regop16(m_s); %EXTENDED; %CMP16; return; default: %ILLEGAL; return; } return; #include "base6x09.ops" PUSH_REGISTERS: if (m_temp.w & 0x80) { @write_memory(--regop16().w, m_pc.b.l); @write_memory(--regop16().w, m_pc.b.h); nop(); } if (m_temp.w & 0x40) { @write_memory(--regop16().w, (®op16() == &m_s) ? m_u.b.l : m_s.b.l); @write_memory(--regop16().w, (®op16() == &m_s) ? m_u.b.h : m_s.b.h); nop(); } if (m_temp.w & 0x20) { @write_memory(--regop16().w, m_y.b.l); @write_memory(--regop16().w, m_y.b.h); nop(); } if (m_temp.w & 0x10) { @write_memory(--regop16().w, m_x.b.l); @write_memory(--regop16().w, m_x.b.h); nop(); } if (m_temp.w & 0x08) { @write_memory(--regop16().w, m_dp); nop(); } if (m_temp.w & 0x04) { @write_memory(--regop16().w, m_d.b.l); nop(); } if (m_temp.w & 0x02) { @write_memory(--regop16().w, m_d.b.h); nop(); } if (m_temp.w & 0x01) { @write_memory(--regop16().w, m_cc); nop(); } return; PULL_REGISTERS: if (m_temp.w & 0x01) { @m_cc = read_memory(regop16().w++); nop(); } if (m_temp.w & 0x02) { @m_d.b.h = read_memory(regop16().w++); nop(); } if (m_temp.w & 0x04) { @m_d.b.l = read_memory(regop16().w++); nop(); } if (m_temp.w & 0x08) { @m_dp = read_memory(regop16().w++); nop(); } if (m_temp.w & 0x10) { @m_x.b.h = read_memory(regop16().w++); @m_x.b.l = read_memory(regop16().w++); nop(); } if (m_temp.w & 0x20) { @m_y.b.h = read_memory(regop16().w++); @m_y.b.l = read_memory(regop16().w++); nop(); } if (m_temp.w & 0x40) { @(®op16() == &m_s ? m_u : m_s).b.h = read_memory(regop16().w++); @(®op16() == &m_s ? m_u : m_s).b.l = read_memory(regop16().w++); nop(); } if (m_temp.w & 0x80) { @m_pc.b.h = read_memory(regop16().w++); @m_pc.b.l = read_memory(regop16().w++); nop(); } @eat(1); return; INDEXED: @m_opcode = read_opcode_arg(); if (m_opcode & 0x80) { switch(m_opcode & 0x7F) { case 0x00: case 0x20: case 0x40: case 0x60: case 0x10: case 0x30: case 0x50: case 0x70: m_temp.w = ireg(); ireg()++; eat(3); break; case 0x01: case 0x21: case 0x41: case 0x61: case 0x11: case 0x31: case 0x51: case 0x71: m_temp.w = ireg(); ireg() += 2; eat(4); break; case 0x02: case 0x22: case 0x42: case 0x62: case 0x12: case 0x32: case 0x52: case 0x72: ireg()--; m_temp.w = ireg(); eat(3); break; case 0x03: case 0x23: case 0x43: case 0x63: case 0x13: case 0x33: case 0x53: case 0x73: ireg() -= 2; m_temp.w = ireg(); eat(4); break; case 0x04: case 0x24: case 0x44: case 0x64: case 0x14: case 0x34: case 0x54: case 0x74: m_temp.w = ireg(); eat(1); break; case 0x05: case 0x25: case 0x45: case 0x65: case 0x15: case 0x35: case 0x55: case 0x75: m_temp.w = ireg() + (INT8) m_d.b.l; eat(2); break; case 0x06: case 0x26: case 0x46: case 0x66: case 0x16: case 0x36: case 0x56: case 0x76: m_temp.w = ireg() + (INT8) m_d.b.h; eat(2); break; case 0x08: case 0x28: case 0x48: case 0x68: case 0x18: case 0x38: case 0x58: case 0x78: @m_temp.w = ireg() + (INT8) read_opcode_arg(); eat(1); break; case 0x09: case 0x29: case 0x49: case 0x69: case 0x19: case 0x39: case 0x59: case 0x79: @m_temp.b.h = read_opcode_arg(); @m_temp.b.l = read_opcode_arg(); m_temp.w = ireg() + m_temp.w; eat(3); break; case 0x0B: case 0x2B: case 0x4B: case 0x6B: case 0x1B: case 0x3B: case 0x5B: case 0x7B: m_temp.w = ireg() + m_d.w; eat(5); break; case 0x0C: case 0x2C: case 0x4C: case 0x6C: case 0x1C: case 0x3C: case 0x5C: case 0x7C: @m_temp.b.l = read_opcode_arg(); m_temp.w = m_pc.w + (INT8) m_temp.b.l; eat(1); break; case 0x0D: case 0x2D: case 0x4D: case 0x6D: case 0x1D: case 0x3D: case 0x5D: case 0x7D: @m_temp.b.h = read_opcode_arg(); @m_temp.b.l = read_opcode_arg(); m_temp.w = m_pc.w + (INT16) m_temp.w; eat(4); break; case 0x0F: case 0x2F: case 0x4F: case 0x6F: case 0x1F: case 0x3F: case 0x5F: case 0x7F: @m_temp.b.h = read_opcode_arg(); @m_temp.b.l = read_opcode_arg(); eat(1); break; default: m_temp.w = 0x0000; break; } // indirect mode if (m_opcode & 0x10) { set_ea(m_temp.w); @m_temp.b.h = read_operand(0); @m_temp.b.l = read_operand(1); eat(1); } } else { // 5-bit offset m_temp.w = ireg() + (INT8) ((m_opcode & 0x0F) | (m_opcode & 0x10 ? 0xF0 : 0x00)); eat(2); } @set_ea(m_temp.w); return; EXG: { UINT8 param = read_opcode_arg(); exgtfr_register reg1 = read_exgtfr_register(param >> 4); exgtfr_register reg2 = read_exgtfr_register(param >> 0); write_exgtfr_register(param >> 4, reg2); write_exgtfr_register(param >> 0, reg1); } eat(hd6309_native_mode() ? 3 : 6); return; TFR: { UINT8 param = read_opcode_arg(); exgtfr_register reg = read_exgtfr_register(param >> 4); write_exgtfr_register(param >> 0, reg); if ((param & 0x0F) == 4) { m_lds_encountered = true; } } eat(hd6309_native_mode() ? 2 : 4); return; ILLEGAL: log_illegal(); return;