PICO-56: 65C02 + TMS9918A on a Pi Pico

Description

My 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 - 6502/65C02 CPU emulation library (C99) * vrEmu6522 - 6522/65C22 VIA emulation library (C99) * vrEmuTms9918 - TMS9918A/TMS9929A VDP emulation library (C99) Full source code and a bunch of tutorials (episodes) now available on GitHub: github.com/visrealm/pico-56 Pi Pico binary also available in the GitHub repo releases. Follow along on YouTube here: youtube.com/@TroySchrapel Thanks to PCBWay for supporting this project. You can order the PICO-56 PCB directly from PCBWay using this link: https://www.pcbway.com/project/shareproject/PICO_56_Retro_Computer_on_a_Pi_Pico_515c59b8.html

Details

Files

pico-56.uf2

Raspberry Pi Pico flash image for PICO-56 firmware v0.2

uf2 - 322.00 kB - 11/22/2023 at 23:21

Download

Schematic_Pico56_v1_2.png

PICO-56 Schematic v1.2 (latest)

Portable Network Graphics (PNG) - 478.22 kB - 11/22/2023 at 23:10

Preview

Gerber_PCB_Pico56_v1_2.zip

PICO-56 Gerber v1.2 (latest)

x-zip-compressed - 241.73 kB - 11/22/2023 at 23:10

Download

Schematic_Pico56_v1_2.pdf

PICO-56 Schematic v1.2 (latest)

Adobe Portable Document Format - 128.46 kB - 11/22/2023 at 23:10

Preview

pico56-bom.xlsx

PICO-56 BOM v1.2 (latest)

sheet - 11.40 kB - 11/22/2023 at 23:09

Download

Components

1 × PICO-56 PCB https://www.pcbway.com/project/shareproject/PICO_56_Retro_Computer_on_a_Pi_Pico_515c59b8.html

2 × 10nf (103) ceramic capacitor (C3,C4) https://au.mouser.com/ProductDetail/594-K103K10X7RF5UL2

3 × 100nf (104) ceramic capacitor (C5,C6,C7) https://au.mouser.com/ProductDetail/594-K104K10X7RF5TL2

3 × 10uf (106) electrolytic capacitor (C8,C1,C2) https://au.mouser.com/ProductDetail/80-ESK106M016AC3AA

3 × 4kΩ 0.25w resistor (R1,R5,R9) https://au.mouser.com/ProductDetail/603-MFR-25FTF52-4K

Project Logs

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PICO-56 Firmware v0.4 update
Troy Schrapel • 06/16/2024 at 03:33 • 0 comments
Enhancements to BASIC including:
- Implementing UNPLOT X,Y
- Implementing CLS for DISPLAY 2 mode
- Fixed COLOR function to update background color register
- Disabled kernel console interrupt during DISPLAY 2 mode
New BASIC example programs:
- leaf.bas: Generate a "Barnsley Fern"
- draw.bas: Etch-a-sketch style drawing program using the NES controller
PICO-56 available in this month's HackerBox
Troy Schrapel • 06/04/2024 at 04:16 • 0 comments

Excited to have teamed up with HackerBoxes who are featuring the PICO-56 in this month's HackerBox. Check out HackerBoxes for more details.
PCBWay 6th Project Design Contest - Popular Prize Winner!
Troy Schrapel • 03/15/2024 at 01:04 • 0 comments

The little PICO-56 has won a Popular Prize in the 6th PCBWay Project Design Contest. There were a lot of great designs and winners. Congratulations to all of them. Check them out here: Meet The Winners of 6th Project Design Contest - News - PCBway
PICO-56 case released
Troy Schrapel • 03/10/2024 at 12:40 • 0 comments

Want a case for your PICO-56? STLs and print details now available on GitHub. https://github.com/visrealm/pico-56
PICO-56 kits back in stock
Troy Schrapel • 02/20/2024 at 10:10 • 0 comments

The wait is over! I have some PICO-56 kits back in stock. If you're interested, check out PICO-56 Kit on Tindie
Complete kit build video
Troy Schrapel • 01/22/2024 at 04:32 • 0 comments

If you're curious about what's involved in building a PICO-56 kit, check out this full build:
Giveaway winners announced
Troy Schrapel • 01/16/2024 at 01:38 • 0 comments
The response to the giveaway has been absolutely fantastic with 173 entries received over the 7 days giving each entry a roughly 1 in 58 chance of winning a kit.
The lucky winners are:
- Yoshitaka Kuwata
- Frédéric Segard
- Steve Kohls
The winners have been notified by email.

If you haven't received your 'Congratulations!' email, check your spam.

Congratulations! and happy PICO-56-ing :)

Cheers
- Troy
PICO-56 Introduction and Giveaway
Troy Schrapel • 01/08/2024 at 23:55 • 0 comments

This video is a brief introduction to the PICO-56 and also details an initial giveaway of 3 complete kits.
PICO-56 kits incoming + giveaway
Troy Schrapel • 11/29/2023 at 03:10 • 0 comments

PICO-56 kits will be available soon. I'll be giving a few away too! Who's keen?
It's a 65C02/TMS9918A/AY-3-8910 homebrew computer on a Raspberry Pi Pico, but can easily be adapted to other hardware configurations. https://github.com/visrealm/pico-56
Follow https://youtube.com/@TroySchrapel for details to be announced next week.
Q*Bert on my PICO-56
Troy Schrapel • 11/22/2023 at 23:49 • 0 comments