65C02 BIT emulation bug

ct6502 / apple2ts

Apple II Emulator in TypeScript

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Closed mgolombeck closed 8 months ago

mgolombeck commented 8 months ago

Apple Core Detects bugs in BIT opcode flag operations It seems like the flags of the 65C02 BIT opcodes are not set correctly.

Bildschirmfoto 2024-01-19 um 10 56 42

To Reproduce The following screenshot shows the code that fails of the BIT immediate opcode:

Further Remarks Flag operations of other BIT addressing modes also fail.

ct6502 commented 8 months ago

I didn't realize that the BIT in Immediate mode only set the Z flag, not N or V! Should be an easy fix. Thanks for logging it.