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Fixed PC relative addressing on konamicpu; scontra and thunderx work now (nw)

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This commit is contained in:
Nathan Woods 2013-03-17 19:07:41 +00:00
parent 485aafe721
commit a1dc82ca67
1 changed files with 4 additions and 2 deletions
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6
src/emu/cpu/m6809/konami.ops
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@ -368,16 +368,18 @@ INDEXED:
case 0x24: case 0x34: case 0x54: case 0x64: case 0x74:
// postbyte offset
m_ea.w = ireg(); // need to do this now because ireg() might be PC
@m_temp.b.l = read_opcode_arg();
m_temp.w = ireg() + (INT8) m_temp.b.l;
m_temp.w = m_ea.w + (INT8) m_temp.b.l;
eat(1);
break;
case 0x25: case 0x35: case 0x55: case 0x65: case 0x75:
// postword offset
m_ea.w = ireg(); // need to do this now because ireg() might be PC
@m_temp.b.h = read_opcode_arg();
@m_temp.b.l = read_opcode_arg();
m_temp.w = ireg() + (INT16) m_temp.w;
m_temp.w = m_ea.w + (INT16) m_temp.w;
eat(2);
break;