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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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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 destination.

The seller

Troy Schrapel (visrealm)

Troy Schrapel (visrealm) logo

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