I've made many NES repros for myself and most have gone fantastically. even ones where i slipped with the dremel and cut traces, i've managed to repair and get working. But I'm having a hard time with one game and i think i'm just missing something.
I'm trying to make a 128kb SNROM game cart for myself, but it just won't work. I've actually made 2 attempts now.
the game is mmc1 and requires both 8kb CHR-RAM and W-RAM, with no battery backup.
I used ultima exodus as my donor (sorry ultima), which has all the right hardware but has battery backed SRAM.
I wired up the eprom as usual and when it got to the battery part, as per the [NESDEV SxROM page](http://wiki.nesdev.com/w/index.php/SxROM), in the "battery data retention" section, i removed the battery, D1, D2, R1, R2, R3, and i connected the SL solder pad. I also removed the extra cap, but tried it both with and without it as the page doesn't mention it.
regretfully i still get a black screen with this game. before i desolder the eproms and start over again, I was curious if theres something simple i'm missing, possibly in the battery conversion process?
thanks!
I'm trying to make a 128kb SNROM game cart for myself, but it just won't work. I've actually made 2 attempts now.
the game is mmc1 and requires both 8kb CHR-RAM and W-RAM, with no battery backup.
I used ultima exodus as my donor (sorry ultima), which has all the right hardware but has battery backed SRAM.
I wired up the eprom as usual and when it got to the battery part, as per the [NESDEV SxROM page](http://wiki.nesdev.com/w/index.php/SxROM), in the "battery data retention" section, i removed the battery, D1, D2, R1, R2, R3, and i connected the SL solder pad. I also removed the extra cap, but tried it both with and without it as the page doesn't mention it.
regretfully i still get a black screen with this game. before i desolder the eproms and start over again, I was curious if theres something simple i'm missing, possibly in the battery conversion process?
thanks!