The SRAM part of the project is now complete and fully wired with the motherboard. It is not yet mounted on it though. Addressing of RAM works, writing data works, reading data works. :) Makes me smile.

Above is the finished SRAM module. It uses Chiplus 256K S-RAM IC and two PIC16F723A mcus to drive it. Both controller mcus are using mym custom made TDP protocol for communication with cpu mcu.

and the bottom side.

What follows? Well, the keyboard would come in handy. So I guess I will resume with that. Tomorrow I must order some -much needed- additional components.

Have a wonderful day everybody.