hbc-56 VS vrEmuTms9918

I use a PIC16F microcontroller. Schematics and PIC code in my HBC-56 repo. https://github.com/visrealm/hbc-56

If you're keen to add a VDP as u/production-dave suggested, I have schematics and a bunch of code in my HBC-56 GitHub repo

Schematics are here https://github.com/visrealm/hbc-56/tree/master/schematics/6502

The schematics for my TMS9918A display card are in my github repo. It uses a single SRAM instead of the original DRAMs. The circuitry between the TMS9918A and the TV is just a simple transistor follower circuit (shown in the schematic): https://github.com/visrealm/hbc-56/tree/master/schematics/tms9918

So this is really just cobbled together from this project by u/visrealm https://github.com/visrealm/hbc-56

I've actually just ordered the perix perrino 409 that sends the AA after self test. The HP keyboard definitely doesn't seem to be working. My plan is to interface it with a PIC microcontroller by copying the setup here: https://github.com/visrealm/hbc-56. from u/visrealm

It looks like a shift register can be used in connecting a NES controller but likely isn't the full story. Check out u/visrealm's HBC build. He uses separate shift register chip to connect to a NES but maybe the 6522 can be used in a similar way.

It's Assembly. https://github.com/visrealm/hbc-56/tree/master/code/6502/mandlebrot

I have most schematics, software, emulator, etc on github. https://github.com/visrealm/hbc-56

These are for a 6502 build. https://github.com/visrealm/hbc-56

TMS9918A Library: https://github.com/visrealm/vrEmuTms9918

I did, except for the AY-3-8910 audio emulation (which doesn't work in web, but does work on desktop). But, the rest (65C02, TMS9918A, UART, debugger, UI, glue, web port, etc.) is all from scratch.

I've separated out the TMS9918 emulator (written in C) to a separate repo if anyone is interested: https://github.com/visrealm/vrEmuTms9918 . It should support Graphics I, Graphics II and Text modes. Including full sprite support. Mostly untested at this point.