Repository files navigation

MyHBC-56, a 65C02/TMS9918A homebrew computer on a backplane, fully emulated on a Raspberry Pi Pico.

Emulating the following HBC-56 hardware

• 65C02 CPU
• 65C22 VIA
• TMS9918A VDP
• Dual AY-3-8910 PSGs
• Dual NES controller inputs
• PS/2 keyboard input
• 96KB Banked RAM/ROM

Making use of my various emulation libraries (and more):

• vrEmu6502 - 6502/65C02 CPU emulation library (C99)
• vrEmu6522 - 6522/65C22 VIA emulation library (C99)
• vrEmuTms9918 - TMS9918A/TMS9929A VDP emulation library (C99)

Follow along on YouTube here:youtube.com/@TroySchrapel

To set up your development environment for the Raspberry Pi Pico, follow theRaspberry Pi C/C++ SDK Setup instructions.

For Windows users, there is a pre-packaged installer provided by the Raspberry Pi Foundation:https://github.com/raspberrypi/pico-setup-windows/releases/. Once installed, just open the pre-configured "Pico - Visual Studio Code" from your start menu.

The build system expectspython3 to be available. If you have installed Python 3 outside of the Microsoft Store, you may need to alias your Python executable.

You can do this from an elevated (Administator) command prompt in your python directory e.g.C:\Program Files\Python310\ by creating a symlink with the command:mklink python3.exe python.exe.

In the Episodes, I build the code from the ground up and provide a number of working demos. These are a work in progress with more to come as the videos come out.

In this episode, I build a VGA circuit on the Raspberry Pi Pico and write an intitial generic VGA output library and a number of VGA test programs from a test pattern through to moving sprites and an 800x600 framebuffer.

In this episode, I incorporate my TMS9918 library and create some test programs to test the TMS9918 functionality on the Pi Pico.

Complete PICO-56 kits are now available on Tindie:

Also featured in HackerBox 0103 for those in the US:

Gerbers for the PICO-56 v1.4 are now available. See/schematics

If you would like to support this project, you canorder your PCBs from my PCBWay project link

There is a more detailed BOM in the/schematics folder. Alternatively, I have created aMouser project for this which contains everything except for the NES connectors which can be obtained from AliExpress.

A 3D printed case is available. All STLs are in the/case directory.

Thanks toPCBWay for supporting this project.

• Windows Development Environment Installer
• Raspberry Pi Pico C/C++ SDK (PDF)
• HBC-56 Project
• vrEmu6502 - 6502 CPU Emulation Library
• vrEmu6522 - 6522 VIA Emulation Library
• vrEmuTms9918 - TMS9918A VDP Emulation Library

This code is licensed under theMIT license