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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
CSM04048N Speech chip (Sunsonic Educational Computer Learning Card)
Typesingle
Mapper241
Original mapper241
PCB marks
Tags:#audio
Uploaded:2020-02-28 11:32:57
Elements:
NameValue
IC16264
IC26264
IC327F080
IC47420
IC574273
IC6CSM04048N(DIL16)
IC77404
IC816V8
C12.2u
C2100n
C3?
C4-
CART1FAMICOM_CART
D1hack
D2hack
D3
D4
D5
JP1hack
JP2hack
JP3hack
JP4CLOSED
R11k (hack)
R10?
R2100k
R347k
R447k
R51k
R610k
R710k
R8100k (-)
R9-
T1C945
T2C9012
T3-

Chip signature:
6264+6264+27F080+7420+74273+CSM04048N(DIL16)+7404+16V8
PCB top:

PCB bottom:
Shell top:
No photo

Shell bottom:
No photo
Screenshoots:
Extra info:
http://forums.nesdev.com/viewtopic.php?f=9&t=19793&p=247330#p247330

I tried to trace the board - schematics (that might need corrections):
[url=https://obrazki.elektroda.pl/9685832300_1582984261.png][img]https://obrazki.elektroda.pl/9685832300_1582984261_thumb.jpg[/img][/url] 

[code]
$5000-$5fff: communication (read/write) with audoi chip

$6000-$7fff: RAM

$8000-$ffff (no bus conflicts):
[M...PPPP]
 |   ||||
 |   ++++- 32kB PRG bank at $8000-$ffff
 +-------- goes to mising PAL (mirroring control?)
 
          .---v---.
CPU D3 <> |01   16| <> CPU D7
CPU D2 <> |02   15| -- GND
CPU D1 <> |03   14| <> CPU D4
CPU D0 <> |04   13| ?? NC
   GND -- |05   12| -> AUDIO2 (not used)
CPU D6 -> |06   11| -> AUDIO1 
    NC ?? |07   10| -- +5V
   /CE -> |08   09| <- R/w
          '-------'
[/code]

It perfectly matches the blob audio chip from [url=https://forums.nesdev.com/viewtopic.php?f=9&t=18248]subor sb-97 computer[/url], except that some data pins are shuffled, not all are used ant second audio channel is not wired.

I'm also quite interested with the mising PAL. Except that it could generate enable signal to the register at $8000, it can control CHR-RAM-A3 (?) and CHR-RAM-A12, which are not directly wired to PPU address lines. PAL watches PPU-A9, PPU-A3 (?), PPU-A0 (?). Would that mind to be used to make automatic CHR-RAM bank switch in middle of screen, just like [url=http://wiki.nesdev.com/w/index.php/Talk:INES_Mapper_163] Mapper 163 does?[/url]

MLX, can you confirm the connections 1-2-3-4 and  tell where the line 5 goes behind the capacitor?
[url=https://obrazki.elektroda.pl/8700168500_1582985204.jpg][img]https://obrazki.elektroda.pl/8700168500_1582985204_thumb.jpg[/img][/url]

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