INES Mapper 036: Difference between revisions

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(minor updates)
Line 3: Line 3:
* Strike Wolf
* Strike Wolf
* Policeman
* Policeman
* F-15 City War
* F-15 City War (no ASIC)


Even though these games can evidently be emulated as a weird kind of GNROM, the hardware does something quite different:
Even though these games can evidently be emulated as a weird kind of GNROM, the hardware does something quite different:
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  Mask: $E103
  Mask: $E103
  write $4102 or $8000-$FFFF: [..PP ....] - Request 32 KiB PRG bank
  write $4102 or $8000-$FFFF: [..PP ....] - Request 32 KiB PRG bank
  write $4100 then $E103: activate PRG bank switch
  write $4100 then $8000-$FFFF: activate PRG bank switch
  read $4100: [..PP ....] - Return current 32 KiB PRG bank
  read $4100: [..PP ....] - Return current 32 KiB PRG bank
  read or write others: ?
  read or write others: ?

Revision as of 16:46, 3 April 2016

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. Three games are currently known to use it, mostly published by Gluk Video:

  • Strike Wolf
  • Policeman
  • F-15 City War (no ASIC)

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 then $8000-$FFFF: activate PRG bank switch
read $4100: [..PP ....] - Return current 32 KiB PRG bank
read or write others: ?

This PRG reverse-engineering is confusing and incomplete.

See also: