[Coco] FPGA CoCo and video

[Mark Marlette]

james,

You would have loved to have met Don Wiess at the fest, Motorola Chip Designer of the 6809 and many other 8-bit uPs and uCs. I believe the HC11 was another one of his.

VERY interesting.

Regards,

Mark
Cloud-9


----- Original Message -----
From: jdaggett at gate.net
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Tuesday, May 18, 2010 12:13:13 PM
Subject: Re: [Coco] FPGA CoCo and video

On 18 May 2010 at 12:57, Mark Marlette wrote:

> Made it though another reduction here at work. I am now the youngest left
> in my current job title position and labor grade. They let the youngest
> one go this time for some reason....Sharks....let my cube partner next do
> go, had 8 months to go before he qualified for retirement.....

I know that feelilng. I got let go with a year to qualify for the rule of 75 which would have kept 
me on the compnay insurance plan instead of COBRA. Bummer.

By theway I do have a recent copy of Gary's code but never really looked to much into it 
either. Lately I have been porting the GATOR HC11 CPU core over to Xilinx. A not to difficult 
of a port. I like that processor core. Compact and fairly fast. The main CPU core only uses 
1456 4 input LUTs and 223 flip flops. Less than one third the resources of an XC3S250E. 
There are a few warning messages that I need to work out and get corrected. 

What is nice is the processor is microcoded and the tools to generate the microcode 
probably can be modified to generate other microcode. The files to generate the microcode is 
nothing more that modified 68K assembly code using only  macros. 

james



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