Cart DB #248: 4 in 1

Notes for chip search:

Use "+" as delimeter for all fields (except "cart name", where space is used); if many values are entered, all of them must appear in the cartridge then; case is not sensitive
"Mapper" is the actual mapper used by this cartridge hardware (might not match the one at wiki.nesdev.com, as at the moment I was analyzing this cartridge, there was no mapper assigned to it, so I had to assign my own number for testing)
"Original mapper" is the mapper used by licensed version of this game (for multicarts, it refers to mapper of the inside games, so 0+2 means this cartridge can run NROM+UNROM games)
Order in which you put values doesn't matter (you can write 7400+74138+7400 or 7400+7400+74138 to search for a cartridge that contains at least two 7400 chips and one 74138
Some chips (like PAL16*8) appear in cartridges as 16V8 or 16L8, so be sure to check both posibilities
Same goes for memories - type 27F080 to search for 32 pin memories, 27512 for 28 pin with two chip enables or MASKROM_1M_DIP28 for 28 pin with one chip enable
Same goes for mappers - some examples: AX5904(MMC1), AX5202P(MMC3), PT8154BM (9112MMC3), AX5208C(VRC4), 23C3662(VRC2)
Good news is that you can use wildcards, so 74139+*MMC3* will search for any cartrige that has at least one 74139 and MMC3 chip in any version

Name	Value
IC1	27512
IC2	74161
IC3	7400
IC4	74153 (not installed)(74153)
IC5	27512
IC6	27512
CART1	FAMICOM_CART
JP1	OPEN
JP2	CLOSED

Name

Value

IC1

27512

IC2

74161

IC3

7400

IC4

74153 (not installed)(74153)

IC5

27512

IC6

27512

CART1

FAMICOM_CART

JP1

OPEN

JP2

CLOSED

This cartridge consists of 4 x 16 kB NROM games. The mapper circuitry is really simple: [.... ..GG] $8000-$ffff (there is no initializaion on powerup, but 74'161 seems to power-up with ones) || ++- select 16kB PRG-ROM bank at $8000-$bfff & $c000-$ffff ++- select 8kB CHR-ROM bank at $0000-$1fff +-- select mirroring (0=V, 1=H) (only if IC4=7400 chip is present, otherwise mirroring is hardwired, in this version it was hardwired to V) ++- 00=Star Force, 01=F1 Race, 10=Bomber Man, 11=Circus Charlie However, interesting fact is that there is no menu, but on every console reset, next game is launched. It looks like some value in memory is checked on power-up and increased. All of that could be easily implemented using one 74'74 (or 2 switches) The shell has pre-moulded holes for 2 switches

Cart name		Notes for chip search: Use "+" as delimeter for all fields (except "cart name", where space is used); if many values are entered, all of them must appear in the cartridge then; case is not sensitive "Mapper" is the actual mapper used by this cartridge hardware (might not match the one at wiki.nesdev.com, as at the moment I was analyzing this cartridge, there was no mapper assigned to it, so I had to assign my own number for testing) "Original mapper" is the mapper used by licensed version of this game (for multicarts, it refers to mapper of the inside games, so 0+2 means this cartridge can run NROM+UNROM games) Order in which you put values doesn't matter (you can write 7400+74138+7400 or 7400+7400+74138 to search for a cartridge that contains at least two 7400 chips and one 74138 Some chips (like PAL168) appear in cartridges as 16V8 or 16L8, so be sure to check both posibilities Same goes for memories - type 27F080 to search for 32 pin memories, 27512 for 28 pin with two chip enables or MASKROM_1M_DIP28 for 28 pin with one chip enable Same goes for mappers - some examples: AX5904(MMC1), AX5202P(MMC3), PT8154BM (9112MMC3), AX5208C(VRC4), 23C3662(VRC2) Good news is that you can use wildcards, so 74139+MMC3* will search for any cartrige that has at least one 74139 and MMC3 chip in any version
Mapper#
Original mapper#
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