14 Apr
2002
14 Apr
'02
1:49 p.m.
On Sun, 14 Apr 2002 09:00:50 -0600, Ben wrote:
I have a nice FPGA prototype kit, (altera) but I am
having problems
getting A PROM for it. I may go to using smaller chips like the XC-9572
(72 macro cells) ? $12 canadian. They don't make wire wrap PLCC sockets
(or not in DigiKey) so I will end up with making a PCB. I have a new CPU
design and expect about 10 CPLD's in total.
Before you give up on wire-wrap, PLCC sockets (through hole, not surface
mount sockets) have their pins on a .1 inch grid. I have often used strips
of N x 1 wirewrap socket pins, cut to length, and made up ww sockets to
match the underside of a PLCC socket. Such as these:
http://www.mill-max.com/images/products/PDF/049.pdf
=================
Philip Freidin
philip(a)fliptronics.com