Talk:MMC1 pinout: Difference between revisions
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:Given the pictures I can find ([http://kevtris.org/mappers/nes_custom/NES_EVENT.html kevtris], [http://bootgod.dyndns.org:7777/profile.php?id=4627 kevtris-via-bootgod]; both are component side only), it looks like the PA12 input is likely still connected to the cartridge edge. I can't tell anything about whether MMC1 CHR A12 OUT goes to CHR RAM A12. And when I load NWC in FCEUX and trap all mapper writes, it looks like the game just uses 8KB mode anyway. —[[User:Lidnariq|Lidnariq]] 11:41, 12 October 2012 (MDT) | :Given the pictures I can find ([http://kevtris.org/mappers/nes_custom/NES_EVENT.html kevtris], [http://bootgod.dyndns.org:7777/profile.php?id=4627 kevtris-via-bootgod]; both are component side only), it looks like the PA12 input is likely still connected to the cartridge edge. I can't tell anything about whether MMC1 CHR A12 OUT goes to CHR RAM A12. And when I load NWC in FCEUX and trap all mapper writes, it looks like the game just uses 8KB mode anyway. —[[User:Lidnariq|Lidnariq]] 11:41, 12 October 2012 (MDT) | ||
== SNROM, etc... loses CHR banking ? == | |||
I'm pretty sure they don't, they just bank only 8k as they were always supposed to, and it's possible to have two banks of 4k and bankswitch them independently. I might be wrong, I'll have to double check. | |||
[[User:Bregalad|Bregalad]] ([[User talk:Bregalad|talk]]) 04:26, 15 May 2014 (MDT) | |||
Revision as of 10:26, 15 May 2014
Tying PA12 low
Based on the description of NES-EVENT (#105), it appears to tie the MMC1's PA12 input low and connect the cart's PA12 to A12 of the CHR RAM. --Tepples 08:31, 12 October 2012 (MDT)
- Given the pictures I can find (kevtris, kevtris-via-bootgod; both are component side only), it looks like the PA12 input is likely still connected to the cartridge edge. I can't tell anything about whether MMC1 CHR A12 OUT goes to CHR RAM A12. And when I load NWC in FCEUX and trap all mapper writes, it looks like the game just uses 8KB mode anyway. —Lidnariq 11:41, 12 October 2012 (MDT)
SNROM, etc... loses CHR banking ?
I'm pretty sure they don't, they just bank only 8k as they were always supposed to, and it's possible to have two banks of 4k and bankswitch them independently. I might be wrong, I'll have to double check. Bregalad (talk) 04:26, 15 May 2014 (MDT)
