19 Jul 2017

Rally Bike - Taito 1988 (repair log)

Inputs weren't working and game throwed a tilt error when entering in attract mode and just after rebooted:


This could have been a terribly difficult repair. Why? Cause on this harware inputs are handled by the sound CPU (Z80). Normally you wouldn't see the link between them. Luckily Caius form JAMMARCADE made a post about this. So I started with the basics in the sound section, I probed the audio RAM and found data signals weren't much healthy. I piggybacked the RAM and game didn't throw the tilt error anymore. After replacing it game worked perfectly:

Game fixed.
Big thank to Caius.

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