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jwestfall69 / neogeo-diag-bios

Disassembly of smkdan's Neo Geo Diagnostics BIOS with added features
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All test pased but game doesnt boot #40

Open retrolover opened 6 months ago

retrolover commented 6 months ago

Hi, all test passed with neo diag or blue screen with original bios, but game doesnt boot, with unibios just reboot unibios logo, could be cut trace in cartridge slot or z80 error? i didnt test z80. Thanks for update tgis amazing tool.

jwestfall69 commented 6 months ago

It sounds like you have an address or data path issue to the prog roms on the cart. The diag bios alone wont be able to help you track that down. There is a custom prog board

https://github.com/jwestfall69/neogeo-diag-aes-prog https://github.com/jwestfall69/neogeo-diag-mvs-prog

that can be used in conjunction with the diag bios to help track down the issue. You could also just use a multimeter to verify continuity between the address/data lines on the cart slot and the cpu.

retrolover commented 6 months ago

Thanks for the tip! I am looking for conector pinout to backtracking. Thanks again .

El lun, 25 mar 2024 17:36, Jim Westfall @.***> escribió:

It sounds like you have an address or data path issue to the prog roms on the cart. The diag bios alone wont be able to help you track that down. There is a custom prog board

https://github.com/jwestfall69/neogeo-diag-aes-prog https://github.com/jwestfall69/neogeo-diag-mvs-prog

that can be used in conjunction with the diag bios to help track down the issue. You could also just use a multimeter to verify continuity between the address/data lines on the cart slot and the cpu.

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