10 May
2007
10 May
'07
9:24 a.m.
Alexandre Souza wrote:
Umm 600 meg vs 41 meg on dial up. Three 64 CLB CPLD's and 6 2901's would
make a nice 12/24 bit slice. A few more CPLD's and you have your control
logic. That gets me a nice 3 MHZ cpu if my timing guess is right.
Using LS-TTL the same system is lucky to be in the 1 MHZ clock speed.
Love God for that ;o) You **have** fingers for card
edge. If you
don't have, it is real easy to do, take a look in eagle as an example:
You need to do a 0.100" card edge connector. Setup the grid for 0.100",
put a SMD pad with the dimensions of the finger you want, cut it, paste
how much you want in the next grid positions. Do the same on the solder
layer (assuming you were in top layer). Presto, your card edge
connector! ;o)
But just what are the dimensions?
I've done lots of it here. About the 84pin PLCC socket,
you have that in eagle. BTW eagle is - at this moment
- the most
library-full program you can find, but diptrace is coming closer, since
it can import eagle's libraries, and there is a LOT of them floating on
the net, take a look at www.cadsoft.de. If you cannot find, drop me a
mail and I'll help you. I **don't** like eagle and the clunky UI, but
when you learn how to use that, it becomes easy. I created a component
(a PLCC-44 ZIF socket) and a board in less than 10 minutes, for a PLCC
to DIP adapter.
It is the pin numbering I looking at here - a little odd in the corners.
*1 The
improved design went *POOF* with lots of smoke ...
I found out later a diode was shorted for some reason in a full wave
bridge.
So that is all I have to say on this list about abandonware.
Now to download the CPLD software --- now legacy software for what I
need.
Dunno why legacy...are you wanting to mess with PAL/GAL? Later
softwares can do that.