GBC Compatibility Register

Discussion of programming and development for the original Game Boy and Game Boy Color.
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Alyosha_TAS
Posts: 98
Joined: Wed Jun 15, 2016 11:49 am

GBC Compatibility Register

Post by Alyosha_TAS » Sat Oct 06, 2018 6:36 am

Hi,

I am wondering if anyone has any information on the register at $FF4C. This seems to be the location where the game compatibility information at $0143 is written to from the game ROM.

Does anyone know what this is doing?

I am particularly curious if this has any effect on test ROMs which run with 0x80 in that location, which indicates some level of GBC compatibility on GBC hardware, but would have no effect on GB hardware.

lidnariq
Posts: 8904
Joined: Sun Apr 13, 2008 11:12 am
Location: Seattle

Re: GBC Compatibility Register

Post by lidnariq » Sat Oct 06, 2018 10:44 am


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