10 Apr
2002
10 Apr
'02
4:30 p.m.
Richard Erlacher wrote:
If you look at the Cypress CPLD's, I think
you'll find them large enough to
put the whole she-bang, i.e. CPU, FDC, HDC, I/O, RAM, ROM on one device. The
advantage is that with a CPLD theres no doubt at all about what the timing
will be and whether you can use this register or that, since you can ALWAYS
use 100% of the resources. What I find hard to fathom is that with the
FPGA's, you pay for 16Mgates and can use barely 4M of them, and that only if
you're fortunate enough to be able to route to every LUT.
A routes better I think than X, but still I had to play with the design
allot to get it to fit.
--
Ben Franchuk - Dawn * 12/24 bit cpu *
www.jetnet.ab.ca/users/bfranchuk/index.html