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The HBC-56 (65C02/TMS9918A/AY-3-8910 retro computer) on a Raspberry Pi Pico
Retrocomputing
Raspberry Pi
Components

PICO-56

Sold by Troy Schrapel (visrealm)

$35.00

No tax for United States [change]
Include a Raspberry Pi Pico?
Assembly options
Stock available: 4
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Original Design
This product was designed by Troy Schrapel (visrealm). By buying this product you support original hardware creators.

What is it?

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

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

The HBC-56 also has Desktop and Web-based emulators for rapid development cycles.

Current software includes EhBASIC (with SDCard support), multiple game demos including Breakout, Invaders and Q*Bert and a bunch of test/example ASM programs.

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

Flexible!

The hardware can be used for any Raspberry Pi Pico project with:

  • 12-bit (4096 color) VGA output
  • PS/2 keyboard (read and write)
  • Dual NES controllers
  • Stereo audio output
  • MicroSD card support
  • External power and reset

What do you get?

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 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 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 MicroSD card connector U2
2 1x20 pin female header RPI

Optional:

  • Raspberry Pi Pico + headers
  • Assembly

Links to code and documentation

Documentation (youtube.com)

Code (github.com)

Design Files (github.com)

Schematics (github.com)

Product HS Code: 854290

Shipping policy

Most orders are shipped on the next business day. Shipping times vary by location.

The seller

Troy Schrapel (visrealm)

Troy Schrapel (visrealm) logo

MOUNT BARKER, SA, Australia
3 orders since Jan 19, 2026
Designer of modern hardware replacements for your retro machines.