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O2Hawk: fix DJNZ, fixes kill the attacking aliens

This commit is contained in:
alyosha-tas 2020-04-17 22:09:23 -04:00
parent 8e7467f77b
commit 0d2daa24d5
1 changed files with 3 additions and 1 deletions
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4
BizHawk.Emulation.Cores/CPUs/Intel8048/OP_Tables.cs
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@ -398,11 +398,13 @@ namespace BizHawk.Emulation.Cores.Components.I8048
} }
else else
{ {
// NOTE: no PC increment here, jump is relative to last 256 address block before increment.
// so for a DJNZ starting at 0xFE does not overflow to 0x100 before the jump
PopulateCURINSTR(IDLE, PopulateCURINSTR(IDLE,
IDLE, IDLE,
DEC8, (ushort)(reg + RB), DEC8, (ushort)(reg + RB),
RD, ALU, PC, RD, ALU, PC,
INC11, PC, IDLE,
IDLE, IDLE,
IDLE, IDLE,
IDLE, IDLE,