Cart DB #156: Suikan Pipe (Gimmick)

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	27F080
IC2	27512
IC3	74157
IC4	74157
IC5	AX5208C
IC6	74161
C1	100p
C2	-
CON1	FAMICOM_CART
D1	DIODE
R1	1.8k

Name

Value

IC1

IC2

IC3

IC4

IC5

IC6

100p

CON1

FAMICOM_CART

DIODE

1.8k

Gimmick VRC4 Hack [[File:gimmick_vrc4_components.jpg|thumb]] [[File:gimmick_vrc4_top.png|thumb]] [[File:gimmick_vrc4_bottom.png|thumb]] [[File:gimmick_vrc4_sch.png|thumb]] It is regular VRC4 with PRG-ROM mapped also at $6000-$7fff and one additional register at $6000-$7fff (bits of address are latched) A~[011. .... .... PPPP] $6000-$7fff |||| ++++- 8kB PRG-ROM bank at $6000-$7fff (only banks 0-15 can be swapped) This modification was needed because original Gimmick, which is based on mapper FME-7 also uses capability of mapping PRG at $6000-$7fff. ==Hardware implementation== It consists of AX5208C (pirate VRC4), 4 bit latch (74*161) and two multiplexers (74*157). VRC's lines controlling WRAM at $6000-$6fff are tied to latch. Because VRC4 decodes RAM only at $6000-$6fff, when CPU accesses $0000-$7fff, one of muxes fools VRC by feeding GND at his A12, so that when CPU access $6000-$6fff or $7000-$7fff, VRC thinks for both it is $6000-$6fff and enables WRAM control line. ==Trivia== For unknown reason, grounds of 74*157 are not connected to the ground of rest cartridge.

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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