Pete's Projects: V20-MBC

[BigPete]

A few years ago I assembled a V20-MBC:

https://hackaday.io/project/170924-v20-m...w-computer

However I never managed to program the microcontroller that functions as glue logic and boot rom. While looking through my stash of components while planning a different project I stumbled upon my stash of v20 CPUs and since I never really tested them I figured now would be a good time to return to this project and finish it up.

So, a few purchases later (USB to Serial adapter, SD Card Module, AVR programmer) I now have a device that is up and running.


  IMG_3929.jpeg (Size: 2.99 MB / Downloads: 49)

Here it is running CPM:

  CPM86.png (Size: 78.03 KB / Downloads: 52)

And here we are running DOS 2.1 (newer versions require DMA which this board doesn't have):


  DOS.png (Size: 105.72 KB / Downloads: 53)

  DOS2.png (Size: 98.52 KB / Downloads: 53)

Obligatory Mandelbrot Set:


  Mandelbrot_set.png (Size: 142.31 KB / Downloads: 53)