[Q*bert clone WIP (65C02 / TMS9918 / AY-3-8910)]

On 9/6/2023 at 10:35 PM, Silvio Mogno said:

Really cool!

A very belated... Thanks!

[Q*bert clone WIP (65C02 / TMS9918 / AY-3-8910)]

Hi all,

 

Started working on a Q*bert clone for my HBC-56 homebrew 65C02 /TMS9918 / AY-38910 build (just for fun).

 

Very early days, but here's a couple of videos showing the progress so far:

 

Emulator:

Real hardware:

 

65C02 CPU is running at 3.6864MHz.
It's using Graphics II mode of the TMS9918A.
My first attempt at PCM audio on my hardware (a pair of AY-3-8910's) driven by 65C22 VIA timer interrupts at a lowly 4096Hz. Can definitely go a fair bit higher, but will eat through my 32KB ROM pretty quick.

 

All code, schematics, emulator, etc. on GitHub: https://github.com/visrealm/hbc-56

[Breakout clone (65C02 / TMS9918A)]

7 hours ago, gorgh said:

very interesting, I would like to write small article about this hardware, where one could get to know this machine better?

Thanks. The two main sources of information would be

 

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

 

and Hackaday  https://hackaday.io/project/180904-hbc-56-6502-tms9918-on-a-backplane

 

There are schematics on github and all of the 6502 software is there. Also the emulator (with source code) which can be run on a desktop or browser. 

 

[Breakout clone (65C02 / TMS9918A)]

Previously, my web-based emulator ran BASIC by default and you could drag ROM images into it. I've just added support from loading server-side ROMS, so now you can try it yourself:

 

https://visrealm.github.io/hbc-56/emulator/wasm/?rom=breakout

 

A couple of limitations:

1. Audio doesn't work in the web-based emulator.
2. You will need a keyboard.

It's all very BETA. #worksforme

 

Have at it.

 

Oh, I've also cleaned up the code: https://github.com/visrealm/hbc-56/tree/master/code/6502/breakout

[Breakout clone (65C02 / TMS9918A)]

Just started working on a breakout clone for my homebrew 65C02 build. Mainly to have a go at working in Graphics II mode beyond simple demos:

 

 

All source code (65C02 assembly) is available: https://github.com/visrealm/hbc-56/tree/master/code/6502/breakout . 

 

Edit: The video is a little washed-out. It does look better in the flesh. Here's a screengrab from by emulator: