10 Feb
2023
10 Feb
'23
9:22 p.m.
Speaking about Datakit, some old timers may be interested
in this online memorial for Sandy Fraser and his achievements
being held in the UK on February 15:
https://www.cst.cam.ac.uk/news/sandy-fraser-memorial-his-achievements
Heinz
On 2/10/2023 7:03 AM, Clem Cole wrote:
I had to get off my mobile and to real network connection - here is
the URL: https://www.tuhs.org/Archive/Applications/Circuit_Design/
ᐧ
On Fri, Feb 10, 2023 at 8:20 AM Clem Cole <clemc(a)ccc.com> wrote:
FYI: The sources to CDL are in the TUHS archives.
On Fri, Feb 10, 2023 at 7:56 AM Douglas McIlroy
<douglas.mcilroy(a)dartmouth.edu> wrote:
CDL was for designing wired circuit boards, not integrated
circuits..
It was used to design the Datakit switch, the Belle chess
machine and
other hardware.
I suspect the cited IC-design tool was one that Steve Johnson
created
for use in a short course that Carver Mead taught at Bell
Labs. I am
not aware that it saw use outside of that course.
Doug
On Fri, Feb 10, 2023 at 12:37 AM Christian Dreier via TUHS
<tuhs(a)tuhs.org> wrote:
Hello there,
I recently watched an old Unix promotion video by AT&T on
YouTube (AT&T
Archives: The UNIX Operating System:
https://youtu.be/tc4ROCJYbm0) and
they mention a design tool for integrated
circuits
(apparently named
L-Gen or lgen; timestamped link:
https://youtu.be/tc4ROCJYbm0?t=1284)
Part of this software is a language implemented with YACC
that appears
to describe the behavior of digital logic, like
modern hardware
description languages, i.e. Verilog and VHDL.
Does anyone have information about this, in particular:
- Documentation
- Which projects were realized with this?
- Source code, if possible
I asked this question on retrocomputing.stackexchange.com
<http://retrocomputing.stackexchange.com> (see
so far there
is no satisfying answer. A "Circuit Design
Language" (CDL)
is mentioned
and there is some good information about it but
it has
another syntax
(as shown in the video vs. the documentation
about CDL) and
apparently
another purpose (description of board wiring vs.
logic
behavior).
Best regards,
Christian
--
Sent from a handheld expect more typos than usual