[Coco] FPGA CoCo and video

[jdaggett at gate.net]

mark

I would have loved to have been there. The questions I could have asked would help in better  
understanding the internals of that processor. I do hope there is either a video of his 
presentation or at least a transcript of his presentation to be made available. 

I am somewhat knowledgablable on the HC11 series as we used them a lot in paging 
products. After having to do failure analysis on ICs you get to understand a bit how they work. 
Also have done failure analysis on a version of the MC68HC05 called the MC68HC05WJ. 
That was a Motorola internal microcontroller for paging products that never was sold outside 
Motorola. 

james

 

On 18 May 2010 at 19:57, Mark Marlette wrote:

> 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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