Search found 2 matches

by cardiff
Tue Feb 25, 2020 12:53 pm
Forum: NESdev
Topic: Mapper hacking and debugging.
Replies: 28
Views: 18578

Re: Mapper hacking and debugging.

I've changed mapper register address from $4100 to $6100. You can change bytes in ROM by addresses $1e021 and $1e198 ($41 to $61) Also you need 74hc161 as latch and 74hc00 for signal inversion (you can use any other logic or transistor for this purpose). PRG RAM /CE (pin30 MMC3) -> pin12+pin13 74hc...
by cardiff
Wed Feb 12, 2020 3:19 pm
Forum: NESdev
Topic: Mapper hacking and debugging.
Replies: 28
Views: 18578

Re: Mapper hacking and debugging.

pakosup wrote:
Fri Jan 17, 2020 8:47 am
I thought about mmc5 because it supports 512KB of chr.
But I've done this game on mmc3 with additional logic.
20200103_195518~01.jpg
Hello! A few days trying to make this game on mmc3. The image is buggy. Could you tell me how to connect?