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Merge pull request #2547 from sidneycadot/fix-jmp-ind

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Fixed the behavior of JMP (ind) in sim65 when it runs with the 6502X CPU type.
This commit is contained in:
Bob Andrews
2024-12-02 00:21:31 +01:00
committed by GitHub
parent 1ce8225091 2abd66ea0c
commit 79e26c1bc5
1 changed files with 9 additions and 17 deletions
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10
src/sim65/6502.c
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@@ -1964,9 +1964,7 @@ static void OPC_6502_6C (void)
PC = Regs.PC; PC = Regs.PC;
Lo = MemReadWord (PC+1); Lo = MemReadWord (PC+1);
if (CPU == CPU_6502) /* Emulate the buggy 6502 behavior */
{
/* Emulate the 6502 bug */
Cycles = 5; Cycles = 5;
Regs.PC = MemReadByte (Lo); Regs.PC = MemReadByte (Lo);
Hi = (Lo & 0xFF00) | ((Lo + 1) & 0xFF); Hi = (Lo & 0xFF00) | ((Lo + 1) & 0xFF);
@@ -1978,12 +1976,6 @@ static void OPC_6502_6C (void)
Warning ("6502 indirect jump bug triggered at $%04X, ind addr = $%04X", Warning ("6502 indirect jump bug triggered at $%04X, ind addr = $%04X",
PC, Lo); PC, Lo);
} }
}
else
{
Cycles = 6;
Regs.PC = MemReadWord(Lo);
}
ParaVirtHooks (&Regs); ParaVirtHooks (&Regs);
} }