Cart DB #146: Fire Emblem Gaiden

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	27F080
IC3	27F080
IC4	74259
IC5	7430
IC6	7486
IC7	7402
IC8	AX5208C(VRC4)
BAT	CR2032
C1	-
C2	-
CART1	FAMICOM_CART
D1
D2
D3
JP1	2-3
R1	2,7k
R2	2,7k
R3	4,7k
R4	4,7k
T1	A733

Name

Value

IC1

IC2

IC3

IC4

IC5

IC6

IC7

IC8

BAT

CR2032

CART1

FAMICOM_CART

JP1

2-3

2,7k

4,7k

A733

Finally found bootleg Fire Emblem Gaiden from my [url=https://forums.nesdev.com/viewtopic.php?t=19364]wanted list[/url] - MMC4 port to VRC4. Unfortunately not in my posession, so gave my best to trace it basing on photos. [url=https://obrazki.elektroda.pl/9748694000_1586035738.jpg][img]https://obrazki.elektroda.pl/9748694000_1586035738_thumb.jpg[/img][/url] [url=https://obrazki.elektroda.pl/8556648000_1586035741.jpg][img]https://obrazki.elektroda.pl/8556648000_1586035741_thumb.jpg[/img][/url] [url=https://obrazki.elektroda.pl/6672499800_1586035744.jpg][img]https://obrazki.elektroda.pl/6672499800_1586035744_thumb.jpg[/img][/url] [url=https://obrazki.elektroda.pl/1891616800_1586035746.png][img]https://obrazki.elektroda.pl/1891616800_1586035746_thumb.jpg[/img][/url] [code] 74259 latches value of PPU-A5 to: * LATCH0 (Q6) when PPU-A equals $0fd8..$0fdf or $0fe8..$0fef dcba9876543210 $0fd8..$0fdf: 00111111011xxx $0fe8..$0fef: 00111111101xxx * LATCH1 (Q7) when PPU-A equals $1fd8..$1fdf or $1fe8..$1fef dcba9876543210 $1fd8..$1fdf: 01111111011xxx $1fe8..$1fef: 01111111101xxx [/code] VRC4 is wired as follows: VRC4's PPU-A12 <= PPU-A12 VRC4's PPU-A11 <= ~((PPU-A12 | Q6) | ~(~PPU-A12 | Q7)) VRC4's PPU-A10 <= GND VRC4's CPU_A12 <= ~(~CPU-A12 or /ROMSEL) Mirroring is hard wired to V Which, when PPU-A12=0, simplifies to: VRC4 PPU-A12 <= 0 VRC4 PPU-A11 <= Q6 VRC4 PPU-A10 <= 0 When PPU-A12 = 1, simplifies to: VRC4 PPU-A12 <= 1 VRC4 PPU-A11 <= Q7 VRC4 PPU-A10 <= 0 Which yields to the presence of following registers: [code] $9000 [...PPPP.] 8k PRG bank at $8000-$9fff $9001 [...PPPP.] 8k PRG bank at $a000-$bfff $B000 [....CC..] + $B001 [.....CCC], used when LATCH0=FD $C000 [....CC..] + $C001 [.....CCC], used when LATCH0=FE $D000 [....CC..] + $D001 [.....CCC], used when LATCH1=FD $E000 [....CC..] + $E001 [.....CCC], used when LATCH1=FE [/code] This means that the original Fire Emblem Gaiden ROM needed to be changed - original registers were splited across two regs with bits shifted. If they wired it a litle differently: VRC-CPU-A0 <= 1 VRC-CHR-A14 <= CHR-ROM-A12 VRC-CHR-A15 <= CHR-ROM-A13 VRC-CHR-A16 <= CHR-ROM-A14 VRC-CHR-A17 <= CHR-ROM-A15 VRC-CHR-A18 <= CHR-ROM-A16 VRC-PRG-A12 <= PRG-ROM-A13 VRC-PRG-A13 <= PRG-ROM-A14 VRC-PRG-A14 <= PRG-ROM-A15 VRC-PRG-A15 <= PRG-ROM-A16 VRC-PRG-A16 <= PRG-ROM-A17 And forced, that for reads VRC-CPU-A13 need to be 1, otherwise CPU-A13, for example by the following circuit: [code] VRC-CPU-A13--+--<|----CPU-R/W | +---R----CPU-A13 [/code] The original ROM could be run on this hardware without any ROM modifications! Also no idea why - it does not affects anything: VRC4's CPU_A12 <= ~(~CPU-A12 or /ROMSEL)

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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