https://github.com/jfoucher/picovic

Vic-20 emulation on a Raspberry Pi Pico
https://github.com/jfoucher/picovic

basic commodore emulator rp2040 rp2040-zero vga vic20

Last synced: 3 months ago
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Vic-20 emulation on a Raspberry Pi Pico

• Host: GitHub
• URL: https://github.com/jfoucher/picovic
• Owner: jfoucher
• License: mit
• Created: 2021-07-08T22:09:43.000Z (over 3 years ago)
• Default Branch: master
• Last Pushed: 2023-10-23T22:01:07.000Z (about 1 year ago)
• Last Synced: 2023-10-23T23:21:00.236Z (about 1 year ago)
• Topics: basic, commodore, emulator, rp2040, rp2040-zero, vga, vic20
• Language: C
• Homepage:
• Size: 109 MB
• Stars: 12
• Watchers: 3
• Forks: 0
• Open Issues: 4
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# PICOVIC

This is a Commodore Vic-20 emulator for the [Raspberry Pi Pico](https://www.raspberrypi.org/products/raspberry-pi-pico/)

![Screen photo](basic.png)

Most of the 6502 emulation code is from [fake6502](http://rubbermallet.org/fake6502.c).

A PS/2 keyboard can be plugged in to the pico according to [the schematic](hardware/picovic.pdf) and is used as an input device.

VGA output is based on the scanvideo code from [pico-extra](https://github.com/raspberrypi/pico-extras/tree/master/src/common/pico_scanvideo)

The emulation is extremely basic and for example the VIAs are only emulated so that the cursor works in BASIC. The VIC chip only has the most simple functionality, in the interest of speed and laziness. However since for the time being the emulated speed is higher than the original VIC-20, more functionality will be added in the future.

![running basic](output.gif)

[Running BASIC video](basic.mp4)

## Hardware

![PCB 3D view](https://gitlab.com/jfoucher/picovic/-/jobs/artifacts/master/raw/hardware/Fabrication/picovic-3D_top.png?job=pcb_outputs)

I designed a PCB to go with it. You can check out the hardware folder to get the source, or [download the schematic](https://gitlab.com/jfoucher/picovic/-/jobs/artifacts/master/raw/hardware/Fabrication/Schematic.pdf?job=sch_outputs) and [gerber files](https://gitlab.com/jfoucher/picovic/-/jobs/artifacts/master/raw/hardware/Fabrication/gerbers.zip?job=pcb_outputs).