Hey smart people from this form… I got the GB color mostly working but the CPU mod is not working as intendet. the GB crashes the moment i turn the ltc1799mod on. I think i found the cuase of the error but the solution is beyond my abileties:
Classic (DMG) game boys run on 4mhz and Color (CGB) on 8.x mhz…
there is a formula in the GB oscillatro documentation to calculate the correct values but i can’t adapt it to my needs…
this is the circuit: (based on)
what is different than all the previous GB modules:
- GB color runs on 3V, LTC 1799 accepts that too, I changed the complete thing from 5V to 3V
- GB color runs on 8mhz
my guess is that the changed V-input and the required increased clock-range are causing my problems… i think i have to change R4 (1K) and RV1 (47K) to compensate… but i have no clue…