VDP Retro board Rev 2.1

A composite video board for a 2063-Z80 board.

• Manuals for the TMS9118 VDP chip family

  • TMS9918 1982
  • TMS9118 1984
  • TMS9118 datasheet (Sorry, this is the only place I could find it.)

• A youtube playlist discussing this project and how to build your own can be found in John's Basement

• A PDF version of the schematic can be found here.

Where to get parts

I ordered my VDP on Ebay from hifiic on this auction

I ordered my DRAMs on Ebay from ruixin2020 on this auction

I ordered my long pin header on Amazon here

See the BOM for the rest of the parts and Digikey order numbers.

Release Notes

Rev 2

Change J6 and add J7 to allow routing the IRQ signal from the VDP to the IRQ, NMI, or A8_1

Rev 2.1

Add support for MSX joypad

Rev 2.1.1

Updates to the BOM only (no PCB changes)

• spec different C7 (old part unavailable)
• change J6 from 2-pin to 3-pin header
• add J7, J8, J9 2-pin headers (for MSX & IRQ-polling modes)
• add R1 (current limit safety on J3 and J4)