Apple-2-Tools/bradgrantham-apple2e
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Add ORA (ind) 65C02 instructions.

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This commit is contained in:
Lawrence Kesteloot 2018-08-05 23:17:00 -07:00
parent 53f231573e
commit 43448014b1
1 changed files with 9 additions and 1 deletions
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10
apple2e.cpp
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@ -2190,6 +2190,14 @@ struct CPU6502
break; break;
} }
case 0x12: { // ORA (ind), 65C02 instruction
unsigned char zpg = read_pc_inc(bus);
int addr = bus.read(zpg) + bus.read((zpg + 1) & 0xFF) * 256;
m = bus.read(addr);
set_flags(N | Z, a = a | m);
break;
}
case 0x05: { // ORA zpg case 0x05: { // ORA zpg
unsigned char zpg = read_pc_inc(bus); unsigned char zpg = read_pc_inc(bus);
m = bus.read(zpg); m = bus.read(zpg);
@ -2750,7 +2758,7 @@ struct CPU6502
} }
default: default:
printf("unhandled instruction %02X\n", inst); printf("unhandled instruction %02X at %04X\n", inst, pc - 1);
fflush(stdout); exit(1); fflush(stdout); exit(1);
} }
if(debug & DEBUG_STATE) { if(debug & DEBUG_STATE) {