[Coco] Gal Logic

jdaggett at gate.net jdaggett at gate.net
Fri Jan 30 10:11:08 EST 2004


Mark

My personal belief is to get away from a GAL and go to say one of 
the smaller CPLDs. Beisdes doing any glue ligic that he is thinking 
of there will always be a few other gates and stuff that can be 
thrown into a CPLD that makes it a cost effective means. 

Besides the CPLDs are jtag programable and the software to design 
them is free, well at Xilinx is.

james


On 29 Jan 2004 at 23:35, Mark Marlette wrote:

Date sent:      	Thu, 29 Jan 2004 23:35:03 -0600
To:             	CoCoList for Color Computer Enthusiasts 
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From:           	Mark Marlette <mmarlett at isd.net>
Subject:        	Re: [Coco] Gal Logic
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> At 11:55 AM 1/29/2004 -0600, you wrote:
> 
> I do. Whgt development tools are you using? Abel? Most of what you are
> trying to do are operators. What is your target device? How are you
> going to program it once you have the equations written and compiled?
> Programmers run $100- $50k depending on what you want to do and how
> many. Mine is $1300.
> 
> ??
> 
> Regards,
> 
> Mark
> Cloud-9
> 
> 
> >Does anyone know how to program a coco type clock generator
> >into a GAL chip? I understand combinational logic fairly
> >well, and am able to use "boolean" logic equations. My
> >understanding of "clocked" OR "Registered" logic is a bit
> >rusty.
> >What I want do do is build a dual J-K flip flop E and Q clock
> >generator in a GAL device not in TTL!
> >Also is there a library somewhere of equations for flipflops
> >etc?
> >Eric
> >KB0LXY
> >
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> 
> 
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