[Coco] Introduction

[Mark McDougall]

On 24/02/2013 10:51 PM, John Kent wrote:

> I did make a start on a 6847 VDG, and a PS/2 keyboard to scan code matrix
> wouldn't be too difficult. I think Mark McDougall has been working on a
> CoCo1/CoCo2 design.

I have a working Coco1/2 that runs on the DE1 now; boots HDBDOS and uses an 
SD card for the IDE drive, but it's not much use to anyone else until I get 
writes happening to the SD card. I'm using an SD core that my business 
partner wrote, and it's read-only. He tells me that it wouldn't be difficult 
to add writes - I just need to get around to looking at it.

FWIW it runs on proprietary hardware using CF for read/write.

> A RISC
> piplelined CPU design would be the logical next step for me to take,
> although there are already quite a few open source RISC CPU architectures
> out there.

Like John, I plan on tackling one of these one day, although I have my eye 
specifically on the ARM2 (250) core.

Regards,

-- 
|              Mark McDougall                | "Electrical Engineers do it
|  <http://members.iinet.net.au/~msmcdoug>   |   with less resistance!"