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...
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...