11 Dec
2001
11 Dec
'01
6:44 p.m.
On December 11, Boatman on the River of Suck wrote:
Yeah. I wasn't actually trying to build it using
any specific technology.
What I am doing is taking the latest and greatest and building a PDP-11
compatible (one that act's *exactly* like an 11/70, but faster). I am
probably not going to be using FPGA's, because I don't think they're yet
making FPGA's the speed I want them to go.
Would 200MHz be fast enough ? A lot of the Xilinx fpga's offer 5ns pin to pin
delay. I'd be interested in finding out about the 11/40 architecture - was it
a
bit-sliced design, how deep was the pipeline etc.?
I'm going to have a go at an HP21XX machine of some description next year.
It's just going to emulate some of the HP custom processors and speed isn't
going to be an issue. BTW the HP2116 Cordic Co-processor ran with a cycle
time of 200ns - not exactly fast - add/sub 50-100us mpy/div 100-150us. Yawn.
Chris Leyson
9:06 p.m.
Boatman on the River of Suck wrote:
On Tue, 11 Dec 2001 CLeyson(a)aol.com wrote:
May I recomend the book "CMOS - Circuit design,layout and simulation"
ISBN- 0-7803-3416-7 It is a bit dated - 1998 I hope you have deep
pockets
as a one-off custom CMOS chip is not cheap.
--
Ben Franchuk --- Pre-historic Cpu's --
www.jetnet.ab.ca/users/bfranchuk/index.html
Would 200MHz be fast enough ? A lot of the Xilinx
fpga's offer 5ns pin to pin
In a word, no. 8-)
Peace... Sridhar 
9:26 p.m.
On Tue, 11 Dec 2001, Ben Franchuk wrote:
I was actually thinking of having one my my friends run it off for me for
free. He works in the IBM East Fishkill Process Development Lab. I was
planning on doing it in discrete bipolar components.
Peace... Sridhar
In a word, no.
8-)
Peace... Sridhar
May I recomend the book "CMOS - Circuit design,layout and simulation"
ISBN- 0-7803-3416-7 It is a bit dated - 1998 I hope you have deep
pockets
as a one-off custom CMOS chip is not cheap.
10:01 p.m.
Boatman on the River of Suck wrote:
On Tue, 11 Dec 2001, Ben Franchuk wrote:
I was actually thinking of having one my my friends run it off for me for
free. He works in the IBM East Fishkill Process Development Lab. I was
planning on doing it in discrete bipolar components.
Peace... Sridhar
Well read the book anyway!
--
Ben Franchuk --- Pre-historic Cpu's --
www.jetnet.ab.ca/users/bfranchuk/index.html
In a
word, no. 8-)
Peace... Sridhar
May I recomend the book "CMOS - Circuit design,layout and simulation"
ISBN- 0-7803-3416-7 It is a bit dated - 1998 I hope you have deep
pockets
as a one-off custom CMOS chip is not cheap.
10:26 p.m.
On Tue, 11 Dec 2001, Ben Franchuk wrote:
I was actually thinking of having one my my friends run it off for me for
free. He works in the IBM East Fishkill Process Development Lab. I was
planning on doing it in discrete bipolar components.
Well read the book anyway!
I'll do that.
Peace... Sridhar
In a word, no.
8-)
May I recomend the book "CMOS - Circuit design,layout and simulation"
ISBN- 0-7803-3416-7 It is a bit dated - 1998 I hope you have deep
pockets
as a one-off custom CMOS chip is not cheap.
8430
days inactive
8430
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5 comments
3 participants
participants (3)
-
bfranchuk＠jetnet.ab.ca -
CLeyson＠aol.com -
vance＠ikickass.org