Connecting my homebrew GPU to Ben's 6502 computer
Last time I had 'completed' my design for a supremely powerful GPU featuring a resolution of 400x300 with 256 beautiful colours - as I said at the end of that post, the next step would be to ditch the raspberry pi which was currently driving it, and attach it directly to Ben's 6502 computer. The plan Since last time I left off with the latest GPU board bodged together with my old counter board, I needed to recreate it with the best of both worlds, as well as attach it to the computer. Rather than making a gigantic PCB like last time (or even bigger in order to fit all the counter logic on it!), I decided to make a "stack" of PCBs which would be connected by pin headers in order to pass the necessary shared connections between boards. A 3 board sandwich was what I landed on: bottom board handles the counting, scrolling, vsync & hsync, middle board handles the vram and gpu interface, and the top board is the 6502 computer. The 6502 computer First thing'...