Radofin 1392 Advanced Programmable Video System multicart

[anti77]

Found in the attic an Audio Sonic 1392 Advanced Programmable Video System made by Radofin (sold also as Acetronic, Prinztronic, Fountain, Grandstand, Hanimex and Lansay in other parts of the world). Have no idea where or when I got this, but I have no cartridges to test it so I designed one and ordered it from Jlpcb today:


The 6 pin IC will be actually a DIP switch to choose between ROM images crammed into a 27128. You can see the Kicad schematic (ugly), pcb, gerbers from Github (it's my first design in a very long time). I've uploaded it to PCBWAY shared projects too.

After I'll receive the boards I'll let you all know when I assemble it and test it as I have my doubts around the CE signal that activates the ROM outputs as the original cartridges were 2632 with 3 programmable chip enable...

 

[anti77]

What do you know, it worked right away.

Tested so far with 8x2kb rom games that required no RAM. Used 4k7 for the pullups.

Even if I shut it off before switching games, I have to reset it again after poweron, otherwise some games don't load.

Used this site to look up the games and stuff.

 

[anti77]

For 2k games you have to cut the A11 line (pin 6, front, from the right) between the cartridge port and R1, as I had difficulties otherwise selecting D1. You can paint nail polish over A11 or even a piece of tape for a more non destructive solution...