10 May
2007
10 May
'07
10:17 a.m.
Alexandre Souza wrote:
Arg! I am downloading the wrong software ... I want atmel winCUPL .
( Stops download -- since I can't get the serial proms for a altera fpga.
I knew I had a reason for not using FPGA's.)
That's what I get for reading email and downloading stuff.
Here is a guess for my system speed using LS parts not counting
timing skew and other design features for 6502 style clock.
Clock buffer 15 ns
74LS161 30 ns
74LS158 25 ns
74S472(prom) 60 ns
74LS173 20 ns
------------------
Total 150 ns for 1/4 phase. 600 ns memory cycle max speed.
But just what
are the dimensions?
I don't have it at my head. But in the AMP databook you can find all
of them!
It is the pin numbering I looking at here - a
little odd in the corners.
There are the numberings on datasheets! ;o)
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.
Why not an entire xlinx or altera FPGA?! There are cypress ENOURMOUS
CPLDs that are blazing fast!!!
.