Camerica BF909x pinout
.–v–. | .–v–. | .–v–.
+5V – |01 20| <- CPU A14 | +5V – |01 20| <- CPU A14 | +5V – |01 20| <- CPU A14
CPU R/W -> |02 19| <- CPU A13 | CPU R/W -> |02 19| <- CPU A13 | CPU R/W -> |02 19| <- CPU A13
PRG /CE <- |03 18| -> $C000.1 OR A14 | PRG /CE <- |03 18| -> $C000.1 OR A14 | PRG /CE <- |03 18| -> $C000.1 OR A14
$C000.0 OR A14 <- |04 17| -> $C000.2 OR A14 | $C000.0 OR A14 <- |04 17| -> $8000.4 | $C000.0 OR A14 <- |04 17| -> $8000.4
M2 -> |05 16| <- ?? | M2 -> |05 16| <- ?? | M2 -> |05 16| -> $C000.2 OR A14
CPU A0 -> |06 15| <- CPU /ROMSEL | CPU A0 -> |06 15| <- CPU /ROMSEL | CPU A0 -> |06 15| <- ??
CPU D0 -> |07 14| -> $C000.3 OR A14 | CPU D0 -> |07 14| -> $8000.3 | CPU D0 -> |07 14| <- CPU /ROMSEL
CPU D1 -> |08 13| -> CIC stun | CPU D1 -> |08 13| -> CIC stun | CPU D1 -> |08 13| -> CIC stun
CPU D2 -> |09 12| <- CPU D4 | CPU D2 -> |09 12| <- CPU D4 | CPU D2 -> |09 12| <- CPU D4
GND – |10 11| <- CPU D3 | GND – |10 11| <- CPU D3 | GND – |10 11| <- CPU D3
‘—–’ | ‘—–’ | ‘—–’
BF9093 | BF9096 | BF9097
$C000.3 OR CPU A14 = PRG A17 | $8000.3 = PRG A17 | $8000.4 = CIRAM A10 in Firehawk
$C000.2 OR CPU A14 = PRG A16 | $8000.4 = PRG A16 | $C000.2 OR CPU A14 = PRG A16
$C000.1 OR CPU A14 = PRG A15 | $C000.1 OR CPU A14 = PRG A15 | $C000.1 OR CPU A14 = PRG A15
$C000.0 OR CPU A14 = PRG A14 | $C000.0 OR CPU A14 = PRG A14 | $C000.0 OR CPU A14 = PRG A14
Notes:
- All chips are 20-pin 0.3" PDIP
- Register $8000 is at $8000-$BFFF
- Register $C000 is at $C000-$FFFF
- ?? is unknown input, tied to GND in all cartridges
- BF9093 is used in 64 kB / 128 kB / 256 kB NES & 256 kB Famicom singles (iNES Mapper 071 submapper 0)
- BF9096 is used in NES/Famicom Quattro multicarts (iNES Mapper 232)
- BF9097 is used in Firehawk (iNES Mapper 071 submapper 1) and in 64 kB Famicom singles (pins 17, 16 are not wired here)
- CIC stun latches inverse of CPU A0 when writing at $E000-$FFFF
- Pinout from Kevtris is not accurate
Source: [1]