Plotting 4-in-1 Homebrew Multi

[twistedsymphony]

Not my project, @AlxUnderBase pointed this little multi kit by BrK out to me and I thought it was interesting enough to share.

it's a 4-in-1 bank switcher for a Taito Plotting PCB: https://oshpark.com/shared_projects/PcfvgpI6
Interestingly while 1 game is Plotting, the other 3 games are homebrew ports

Sokoban L.E. (homebrew) https://www.ukvac.com/forum/threads/new-game-release-sokoban-le-for-taito-l-system.36006/
SQIJ! (homebrew) https://tardis.dk/wordpress/?page_id=1695
The Speccies 2(homebrew) https://www.ukvac.com/forum/threads/new-game-release-speccies-2-for-taito-l-system.36007/

There's one for sale assembled with pictures here: https://www.ukvac.com/forum/threads/taito-l-system-4in1-pcb.86811/

It appears to use Atmel AT49F002T https://www.alldatasheet.com/datasheet-pdf/download/56178/ATMEL/AT49F002T.html
which look to be essentially Electrically erasable 27c020 so I don't see why normal ROMs wouldn't work.

While the Osh-Park link says "Puzznic", the Puzznic PCB is slightly different than Plotting and has a some of the main board circuit offloaded to a sub-board. So I'm skeptical that this could be used on Puzznic without undoing some of the factory modifications, or at very least a PAL swap. If you want to try it out I'd recommend sticking to a Plotting donor.

 

[AlxUnderBase]

BrK is @Georgian2 (but he is more active on UKVAC forum with his projects and repair logs) and he also have some nice ideas there osh park !

 

[nem]

Never knew about the homebrew games! Very cool!

 

[Georgian2]

The board was orginaly designed from Puzznic since it was the only one I had. It should work with any 27C020 eproms.
This is how it look on puzznic. No need to remove the top board. If one wants to remove it, the PAL should be moved from the to board to the main board.
For the DIP switches, one can cut a 6 or 8. be careful to leave the remaining 2 undamaged.