I would like to dump a 1000 in 1 multi-game NES cartridge (which has never been dumped) with the INLretro cartridge dumper from infiniteneslives.
The game menu occupies more than 16 KB, so I think it must be on 32KB.
This cartridge contains UNROM games (Contra...) and other types.
I am attaching the photos of the PCB (front and back mirror).
Krzysiobal did an excellent work on this PCB but I don't know how to traduce it in an INLretro script to dump the cartridge.
Here is his work (Thank you Krzysiobal):
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There is one register built of 74273 and 74174 that latches A5..A0, D7..D0 (both chips share the same write signal). All bits ale cleared on power-up. fedcba9876543210 76543210 A~[1??.......PPw???] D~[?mPPPppp] |||||| |||||+++-- PRG A16..14 |||||| ||+++----- PRG A19..17 |||||| |+-------- mirroring (0=V, 1=H) |||+++-----+--------- one of the bits needs to be PRG A13, ||| other two need to distinguish between UNROM, NROM-32, NROM-16 and NROM-8, ||| and one might be for locking writes to the regs (*) ||+------------------ CHR write protection (1=enabled) ++------------------- PRG A21..20 (*) locking might be only used in NROM-32/NROM-16 modes; NROM-8 mode might be used only for accessing CHR data when copying them to the CHR-ROM Because I don't know how the PAL chips works, meaning of bits A2,A0,A1,D7 is unknown You can disable the reset signal by shorting it to +5V (short left leg of the diode with +5V)
NB: I specify that I am a beginner in the dump of cartridges.