Cart DB #448: Zanac (FDS port)

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	6264
IC2	27128(27512)
IC3	27256(27512)
IC4	7432
IC5	74138
IC6	7474
IC7	74138
IC8	7432
CART1	FAMICOM_CART
JP1	CUT
JP2	WIRE
JP3	2-3
JP4	1-2
JP5	SHORT
JP6	1-3
JP7	OPEN

Name

Value

IC1

IC2

IC3

IC4

IC5

IC6

IC7

IC8

CART1

FAMICOM_CART

JP1

CUT

JP2

WIRE

JP3

2-3

JP4

1-2

JP5

SHORT

JP6

1-3

JP7

OPEN

https://forums.nesdev.com/viewtopic.php?f=9&t=18336 https://wiki.nesdev.com/w/index.php/NES_2.0_Mapper_304 The PCB looks extremely weird, not only because it has chips soldered on the bottom side (like only in original famicom games), but mainly because there are many: * vias-to-nowhere (which might be jumpers), weird traces (which also could be jumpers and ned to be cut) [url=https://obrazki.elektroda.pl/7132656300_1569144655.png][img]https://obrazki.elektroda.pl/7132656300_1569144655_thumb.jpg[/img][/url] [url=https://obrazki.elektroda.pl/5796840600_1569144708.png][img]https://obrazki.elektroda.pl/5796840600_1569144708_thumb.jpg[/img][/url] * stupid connections, probably they wanted to make some universal cartridge: [url=https://obrazki.elektroda.pl/6092206800_1569144746.png][img]https://obrazki.elektroda.pl/6092206800_1569144746_thumb.jpg[/img][/url] * is it place for for DIP20 chip? [url=https://obrazki.elektroda.pl/9409172600_1569145111.png][img]https://obrazki.elektroda.pl/9409172600_1569145111_thumb.jpg[/img][/url] * Currently, $8000-$ffff points to unbanked PRG1 (27256, 32K) and $6000-$7fff to PRG2 (27128, 16K), while the PRG2-A13 is selected by $4027.0 (mask: $ec7f), with bus conflicts * If JP3 is switched from 2-3 to 1-2 and PRG2 from 27128 to 27256, $4020.0 (mask: $ec7f) can control PRG2-A14 * CHR-RAM can be replaced with 27128/27256 and when JP6 is switched from 1-3 to 2-3, then it can be banked either using $4027.0 or $4020.0 (depending on JP4/JP5/JP6) * Currently with IC4=7432 it is weird (output of IC4.11 is shorted to output of IC7.13) and IRQ is also driven to VCC with this gate. However, if IC4 is replaced with 7474 then $4022.1 can control /IRQ line. Still stupid, but at least electrically correct - I would rather expect some 4020 counter that counts M2 edges which asserts /IRQ. And the currently valid connection for IC4A will be broken. This gate is not needed - if they connected CPU-R/W to IC5.1, exchanged IC5.9 with IC5.7 and moved IC5.11 to IC8.10, the functionality would retain the same and even there would be no more bus-conflicts. [url=https://obrazki.elektroda.pl/8148349200_1569069692.jpg][img]https://obrazki.elektroda.pl/8148349200_1569069692_thumb.jpg[/img][/url] [url=https://obrazki.elektroda.pl/7608095100_1569069695.png][img]https://obrazki.elektroda.pl/7608095100_1569069695_thumb.jpg[/img][/url]

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#
PCB marks
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Chips