I need SRAM pinout & MMC1 pinout from 512KB PRG MMC1 carts (like DW3/DW4)
k.horton doc have pinout only of MMC1 do 256KB PRG (max PRG A17 in MMC1)
It's the same MMC1, but it uses CHR A16 for the PRG banking.
http://www.tripoint.org/kevtris/mappers/mmc1/NES_SUROM.html
The SRAM should have a 6264 pinout. But I'm not sure.
http://www.embeddedlinks.com/chipdir/pin/6264.txt
i need know where is connect SRAM pin#27, pin #26 and pin#20 in MMC1 512KB carts. (dw3, dw4)
becasuse this carts have different pinout than normal MMC1 sram chips
example: SRAM pin #20 is connected to MMC1 pin#11 in 256KB carts, but
in 512KB carts MMC1 pin#11 is....A18!! - Then where is connected SRAM pin#20????? in 512KB carts????????
this is my question.
aha, in 256KB MMC1 carts SRAM pin #20 is connect to MMC1 pin #11 (this pin is WRAM /CE) in 512KB carts MMC1 pin #11 is A18 - because have different memory mapping.