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• Classic Amiga Boing Ball demo recreated on the PICO-56

  Troy Schrapel • 10/30/2023 at 02:30 • 0 comments

  It's alive! Had to recreate the classic Amiga Boing Ball demo on my PICO-56.

  The PICO-56 is my HBC-56 (65C02/TMS9918A/AY-3-8910) homebrew computer emulated on a single $4 Raspberry Pi PIco.

  Created a new repo for the PICO-56 project: https://github.com/visrealm/pico-56

• PICO-56 coming soon!

  Troy Schrapel • 10/26/2023 at 05:25 • 3 comments

  The complete HBC-56 (65C02/TMS9918A/AY-3-8910) homebrew CPU now emulated on a $4 Raspberry Pi Pico. Project details coming soon: https://github.com/visrealm/pico-56 Here's a sneak peek at the new PCBs

• HBC-56 Emulator v1.1 released

  Troy Schrapel • 09/16/2023 at 02:39 • 0 comments

  https://github.com/visrealm/hbc-56

  This release includes all build targets and is the first produced using GitHub CI:
  

  • Windows
  • Linux-Ubuntu (clang)
  • Linux-Ubuntu (gcc)
  • WebAssembly

  Windows/Linux

  Run the emulator Hbc56Emu(.exe)

  A number of ROMs are included with each build. When you run the emulator without command-line arguments, you will be prompted for a ROM image (.o file). Matching debugging (.o.lmap and .o.rpt) files will be loaded automatically.

  WebAssembly

  The WebAssembly build must be served by a http server. file:// protocol isn't supported. An easy way to do this is using python's http.server:

  > python -m http.server
  Serving HTTP on :: port 8000 (http://[::]:8000/) ...
  

  Full Changelog: v1.0...v1.1

• Some initial progress on my Q*bert clone

  Troy Schrapel • 08/31/2023 at 05:40 • 2 comments

  Started working on a Q*bert clone for my 6502 / TMS9918 build with PCM audio samples on my AY-3-8910s. Here's some footage from my emulator:

  visrealm/hbc-56: Homebrew 6502 on a backplane computer (github.com)
  

• 8-bit Battle Royale Tests - Three different TMS9918A display modes

  Troy Schrapel • 06/04/2022 at 01:58 • 5 comments

  Wrote four different output modes for Matt Heffernan's 8-bit (mandelbrot) Battle Royale. Making use of the TMS9918A's Graphics I, Graphics II and Multicolor modes. All tests are run on my 65C02 @ 3.6864MHz. I think the seldom-used Multicolor mode at 64x48 looks alright for this.

• The first 12 months...

  Troy Schrapel • 06/01/2022 at 13:28 • 0 comments

  A brief montage of mostly unreleased footage covering the first 12 months of my HBC-56. From breadboards to custom protoboards to today. 

• RAM/ROM part #2 'the emulator

  Troy Schrapel • 05/29/2022 at 11:23 • 0 comments

  Have now added part 2 of this. Implementing the RAM/ROM paging in the emulator and writing some test code to test on the emulator and the real deal.

• New runtime configurable RAM/ROM card

  Troy Schrapel • 05/28/2022 at 21:09 • 0 comments

  The latest card is complete. It's a 96KB RAM/ROM card with runtime-configurable banks/pages. This video covers the design, operation, construction and testing of the new card, including PLD development. 

• New TMS9918A card​

  Troy Schrapel • 05/21/2022 at 14:53 • 0 comments

  New video covering the design, assembly and testing of my new TMS9918A card just landed.

  Thanks to @PCBWay Official 
  

• New 65C02 card

  Troy Schrapel • 05/17/2022 at 01:43 • 0 comments

  My new 65C02 CPU card. Thanks to  @PCBWay Official who has provided me with a handful of custom PCBs to replace my old hand-wired cards.

  I have captured the trials and tribulations of converting the old hand-wired card to a custom PCB in the following video: 

  As always, schematics and code are in my GitHub repository.

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