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https://github.com/visrealm/pico-56
The HBC-56 (65C02/TMS9918A/AY-3-8910 retro computer) fully emulated on a Raspberry Pi Pico
https://github.com/visrealm/pico-56
6502 ay-3-8910 electronics emulation hbc-56 pcb raspberry-pi-pico tms9918a vga
Last synced: 12 days ago
JSON representation
The HBC-56 (65C02/TMS9918A/AY-3-8910 retro computer) fully emulated on a Raspberry Pi Pico
- Host: GitHub
- URL: https://github.com/visrealm/pico-56
- Owner: visrealm
- License: mit
- Created: 2023-10-25T23:08:06.000Z (about 1 year ago)
- Default Branch: main
- Last Pushed: 2024-10-26T07:16:05.000Z (18 days ago)
- Last Synced: 2024-10-26T23:12:49.192Z (17 days ago)
- Topics: 6502, ay-3-8910, electronics, emulation, hbc-56, pcb, raspberry-pi-pico, tms9918a, vga
- Language: C
- Homepage: https://youtube.com/@TroySchrapel
- Size: 36.3 MB
- Stars: 120
- Watchers: 12
- Forks: 10
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- Funding: .github/FUNDING.yml
- License: LICENSE
Awesome Lists containing this project
README
# PICO-56
My [HBC-56](https://github.com/visrealm/hbc-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](https://github.com/visrealm/vrEmu6502) - 6502/65C02 CPU emulation library (C99)
* [vrEmu6522](https://github.com/visrealm/vrEmu6522) - 6522/65C22 VIA emulation library (C99)
* [vrEmuTms9918](https://github.com/visrealm/vrEmuTms9918) - TMS9918A/TMS9929A VDP emulation library (C99)
Follow along on YouTube here: [youtube.com/@TroySchrapel](https://youtube.com/@TroySchrapel)
## Development environment
To set up your development environment for the Raspberry Pi Pico, follow the [Raspberry Pi C/C++ SDK Setup](https://www.raspberrypi.com/documentation/microcontrollers/c_sdk.html) instructions.
#### Windows
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 expects `python3` 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`.
## Episodes
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.
#### [Episode 1 - VGA](episodes/ep01-vga)
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.
[
](episodes/ep01-vga/ep01-vga-04-boing) [
](episodes/ep01-vga/ep01-vga-05-nyancat) [
](episodes/ep01-vga/ep01-vga-06-framebuffer) [
](episodes/ep01-vga/ep01-vga-09-slideshow)
#### [Episode 2 - TMS9918A](episodes/ep02-tms)
In this episode, I incorporate my TMS9918 library and create some test programs to test the TMS9918 functionality on the Pi Pico.
## Complete kits
Complete PICO-56 kits are now available on Tindie:
Also featured in HackerBox 0103 for those in the US:
## Gerbers
Gerbers for the PICO-56 v1.4 are now available. See [/schematics](schematics)
If you would like to support this project, you can [order your PCBs from my PCBWay project link](https://www.pcbway.com/project/shareproject/PICO_56_Retro_Computer_on_a_Pi_Pico_515c59b8.html)
## Schematics
## Bill of materials
| Qty. | Description | Code |
|----------|-----------------------------------|-----------------------------------|
| 1 | PICO-56 PCB | PCB |
| 5 | 100nf (104) ceramic capacitor | C3,C4,C5,C6,C7 |
| 3 | 10uf (106) electrolytic capacitor | C8,C1,C2 |
| 3 | 4kΩ 0.25w resistor (3.9kΩ ok) | R1,R5,R9 |
| 2 | 10kΩ 0.25w resistor | R20,R21 |
| 6 | 2kΩ 0.25w resistor | R22,R2,R6,R10,R17,R18 |
| 9 | 1kΩ 0.25w resistor | R3,R7,R11,R13,R14,R15,R16,R19,R23 |
| 3 | 500Ω 0.25w resistor (510Ω ok) | R4,R8,R12 |
| 1 | 2N4401 transistor | Q1 |
| 1 | 1N5819 diode | D1 |
| 1 | Blue LED | LED1 |
| 1 | Green LED | LED2 |
| 1 | Push button | KEY1 |
| 1 | Push button (locking) | PWR1 |
| 1 | Barrel jack connector | 5V |
| 1 | VGA connector | DSUB1 |
| 2 | RCA connector | J2,J3 |
| 2 | NES connector | NO1,NO2 |
| 1 | PS/2 connector | PS2 |
| 1 | Raspberry Pi Pico (plus headers) | U1 |
| 1 | MicroSD card connector | U2 |
There is a more detailed BOM in the [/schematics](schematics) folder. Alternatively, I have created a [Mouser project](https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=8431486f76) for this which contains everything except for the NES connectors which can be obtained from AliExpress.
## 3D Printed case
A 3D printed case is available. All STLs are in the [/case](case) directory.
## Videos
[](https://www.youtube.com/watch?v=Nj_KkYn7YaA)
[](https://www.youtube.com/watch?v=1hwMNQ1DXIU)
### Thanks
Thanks to [PCBWay](https://pcbway.com/g/186WQ9) for supporting this project.
## Resources
* [Windows Development Environment Installer](https://github.com/raspberrypi/pico-setup-windows/releases)
* [Raspberry Pi Pico C/C++ SDK (PDF)](https://datasheets.raspberrypi.com/pico/raspberry-pi-pico-c-sdk.pdf)
* [HBC-56 Project](https://github.com/visrealm/hbc-56)
* [vrEmu6502 - 6502 CPU Emulation Library](https://github.com/visrealm/vrEmu6502)
* [vrEmu6522 - 6522 VIA Emulation Library](https://github.com/visrealm/vrEmu6522)
* [vrEmuTms9918 - TMS9918A VDP Emulation Library](https://github.com/visrealm/vrEmuTms9918)
## License
This code is licensed under the [MIT](https://opensource.org/licenses/MIT "MIT") license