I'll have to check the software to see if the GAL16V8D will suit my needs. I can get 10 of them for $12 with the shipping.

Anything from Xilinx would be extreme overkill. I just want to replace the logic in 5 gate chips.

You might check E-Bay from time to time: I have bought large lots of the ...

I have been getting a good supply of GAL devices 22v10 (and 16v8) types from Jameco.com. They seem to carry some handy parts for the hobbyist.

As far as the atmel wincupl it is "quirky" has anyone tried the software from logical devices? I have been considering purchase of it.

The Logical ...

Thanks, Bogax.

I found this algorithm years ago and have it programmed into a 6502 circuit I built, and it works pretty well. I think it is called the Babylonia Algorithm. It uses simple math operations, and as long as the numbers are not really large, it converges to fairly accurate values with about 10 to 15 ...

Thanks again, Garth.

Thanks, Garth. It was too late to edit it, so here it is again:


.ORG $8000

XDELAY .EQU 155 ;CONSTANTS: USED IN THE DELAY LOOP TO DETERMINE DELAY DURATION
YDELAY .EQU 155 ;FIDDLE WITH THESE TO GET THE RIGHT DELAY.
ADELAY .EQU 5

SCREENMEM .EQU $7000 ;THIS NEEDS TO BE YOUR SCREEN MEM LOCATION ...

It may already be too late for you, but here is another short example with comments (Too bad about the formatting. Everything gets squished. :cry: ):

.ORG $200

XDELAY .EQU 155 ;THESE DETERMINE DELAY DURATION
YDELAY .EQU 155 ;FIDDLE WITH THESE TO GET THE RIGHT DELAY
ADELAY .EQU 5

SCREENMEM .EQU ...