Tim's own version of the Catweasel/Compaticard/whatever

From: Eric J. Korpela <korpela_at_ellie.ssl.berkeley.edu>
Date: Tue Jul 4 20:11:31 2000

> The CPLD offers a number of advantages over FPGA's. They're not the same.
> An FPGA uses a RAM lookup table in to define the function executed by a
> logic cell. CPLD's use EPROM/EEPROM cells to store the logic configuration.
> Most FPGA's require an external configuration prom of one sort or another,
> which it boots on reset.

Actually it's pretty easy to get an Xylinx FPGA to read a program from a
serial or parallel line, so all you need to do to reprogram is assert reset
and feed in the data correctly. But I can see your point on the CPLDs. I
generally go FPGA because I like to have lots of available logic for
flexibility's sake. Anyone have schematics for a large number of floppy
controllers? :)

Eric
Received on Tue Jul 04 2000 - 20:11:31 BST