14 Jul
2015
14 Jul
'15
1:52 p.m.
On 7/14/2015 1:56 PM, tony duell wrote:
You are, of course, absolutely correct...
However, such designs are very few and far between. I will guess that if you took just
about any of the
discrete transistor or TTL-baased minis or desktops and fed the design straight into an
FPGA compiler then
it will not work.
What machines were you thinking of?
Once TTL came out, 8,16,32 bits ended up being the common size.
I working on FPGA computer design, that is TTL style computer, 1975 ish
or so. 20 bits, 74LSxx 181 alu and 4x4 ram for general registers.
I have not yet made up my mind how to do Interupts,but I got most the
logic with only about 6 or so clocks.
-tony