INES Mapper 036
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iNES Mapper 036 is assigned to TXC's PCB 01-22000-400, featuring a 74138, a 74175, and usually a 24-pin ASIC labeled 05-00002-010. Two games are currently known to use it, mostly published by Gluk Video:
- Strike Wolf
- Policeman
Even though these games can evidently be emulated as a weird kind of GNROM, the hardware does something quite different:
The CHR banking is definitely implemented using the two 7400-series ICs:
Mask: $E200 write $4200: [.... CCCC] - Select 8 KiB CHR bank
The PRG banking is part of the ASIC:
Mask: $E103 write $4102 or $8000-$FFFF: [..PP ....] - Request 32 KiB PRG bank write $4100: activate bankswitch to bitwise NOT of requested bank then write $8000-$FFFF: correct bankswitch without extra inversion read $4100: [..PP ....] - Return current 32 KiB PRG bank read or write others: ? There are bus conflicts on writes to $8000-$FFFF.
This PRG reverse-engineering is confusing but mostly complete
Three additional games reportedly use the same PCB, with no ASIC, but they seem incompatible with the above-described CHR banking.
- F-15 City War
- Volley ball
- Puzzle
They're commonly emulated as NINA-06.
See also:
- http://forums.nesdev.org/viewtopic.php?p=167180#p167180 Thread about dumping Policeman starts here
