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Can you help getting more info about those carts?
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 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
Mapper#
Original mapper#
PCB marks
Tags
Chips
Super Bros 8
Typesingle
Mapper912
Original mapper
PCB marks920318-M
Tags:
Uploaded:2021-05-27 10:12:11

Elements:
NameValue
IC127F080
IC227F080
IC3DIL32
IC427F080
IC574157
IC623C3662(VRC2)
CART1FAMICOM_CART
JP1OPEN
JP2CLOSED
JP3CLOSED
JP4CLOSED
JP5CLOSED
JP6OPEN
JP7CLOSED
JP8OPEN

Chip signature:
27F080+27F080+DIL32+27F080+74157+23C3662(VRC2)

PCB top:

PCB bottom:

Shell top:


Shell bottom:

Screenshoots:

Extra info:
http://forums.nesdev.com/viewtopic.php?f=9&t=16955


I analyzed your PCB. Mapper blob matches VRC2 (or VRC4). The unpopulated DIP32 over mapper blob is interesting - it suggests that there existed VRC2 (or VRC4) in smaller package (DIP40 minus 8 original pins).

[code]
           .--\/--. 
   CPU A13 |01  32| +5V
   CPU A14 |02  31| PRG A15
    CPU Ax |03  30| CPU A12
    CPU Ay |04  29| PRG A14
   PPU A12 |05  28| PRG A13
   PPU A11 |06  27| PRG A16
   PPU A10 |07  26| CPU D0
   PRG /CE |08  25| CPU D1 
   CPU R/W |09  24| CPU D2 
 CIRAM A10 |10  23| CPU D4 
   /ROMSEL |11  22| CPU D3
        M2 |12  21| CHR A17
       GND |13  20| CHR A15
   CHR A10 |14  19| CHR A12
   CHR A16 |15  18| CHR A14
   CHR A11 |16  17| CHR A13
           '------'
[/code]

[url=https://obrazki.elektroda.pl/7622125100_1565855335.png][img]https://obrazki.elektroda.pl/7622125100_1565855335_thumb.jpg[/img][/url] [url=https://obrazki.elektroda.pl/1598387400_1565855338.jpg][img]https://obrazki.elektroda.pl/1598387400_1565855338_thumb.jpg[/img][/url] [url=https://obrazki.elektroda.pl/9138101400_1565855342.jpg][img]https://obrazki.elektroda.pl/9138101400_1565855342_thumb.jpg[/img][/url] 

PRG and CHR-ROM address lines are shuffled, so if you're burning eprom with different graphics, you also need to mix them.

[code]
PRG has one chip enable (at pin 20)
CPU-A0  -> ROM->A1
CPU-A1  -> ROM->A0
VRC-A14 -> ROM->A13 (ROM.PIN26)
VRC-A13 -> ROM->A14 (ROM.PIN27)
VRC-A15 -> ROM->A16 (ROM.PIN22)
VRC-A16 -> ROM->A15 (ROM.PIN3)

But there are number of jumpers that allow you to use either DIP32 or DIP28 ROM:
      JP1 JP3 JP8 JP7 JP6 JP2
DIP28 OPN CLS OPN CLS OPN CLS
DIP32 CLS OPN CLS OPN CLS OPN

CHR:
VRC->A11 -> ROM->A10
VRC->A10 -> ROM->A11
VRC->A12 -> ROM->A12
VRC->A14 -> ROM->A13
VRC->A13 -> ROM->A14
VRC->A16 -> ROM->A15
VRC->A15 -> ROM->A16
VRC->A17 -> ROM->A17
[/code]

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