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Full Discussion: UNIX Circuit Design System
Special Forums UNIX and Linux Applications UNIX Circuit Design System Post 302963490 by mghis on Thursday 31st of December 2015 11:32:59 AM
Old 12-31-2015
UNIX Circuit Design System

Hi all.

In some articles I have read about a "UNIX Circuit Design System", which was written originally in some version of
Research UNIX by Sandy Fraser.

Here is a quote from the article "A Research UNIX Reader: Annotated Excerpts from the Programmer's Manual", by Douglas McIlroy:

Quote:
CDL (v7 pages 60-63)
Although most users do not encounter the UNIX Circuit Design System, it has long stood as an important application in the lab. Originated by Sandy Fraser and extended by Steve Bourne, Joe Condon, and Andrew Hume, UCDS handles circuits expressed in a common design language, cdl. It includes programs to create descriptions using interactive graphics, to lay out boards automatically, to check circuits for consistency, to guide wire-wrap machines, to specify combinational circuits and optimize them for programmed logic arrays (Chesson and Thompson). Without UCDS, significant inventions like Datakit, the 5620 Blit terminal, or the Belle chess machine would never have been built. UCDS appeared in only one manual, v7.
Even this page of a book recorded by "Google Books" describes in some extent its use.

However I could not find the source code nor the manual, even though 7th Edition UNIX nowadays is freely available. (I have searched through TUHS Archives)

Does anyone know why is is not included in V7 sources and how can I get it?


Thank you in advance.
 

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NNCHECK(1)						      General Commands Manual							NNCHECK(1)

NAME
nncheck - check for unread articles SYNOPSIS
nncheck [ -Q -r -t ] [ -f format ] DESCRIPTION
nncheck will report if there are some articles on the system which you have not read. Without options, nncheck will simply print a message reporting the number of unread articles with the following format: There are 327 unread articles in 25 groups and when there are no unread articles, the following message will be printed: No News (is good news) nncheck will exit with a value of 0 if there are unread articles, and 99 if there is no news (see the exception for the -r option.) It is important to notice that even though unread articles have been reported by nncheck, the actual number of unread articles may be much lower (or even zero) when nn is invoked to read the articles. This is because the calculation of the number of unread articles is only based on recorded article number intervals. Invoking nn to read the articles may reveal that the articles have previously been read in another news group, have been expired, or are killed using the auto-kill facility. The following options are used to modify the amount and format of the output from nncheck: -Q Quiet operation. No output is produced, only the exit status indicate whether there is unread news. -t Print the name of each group with unread articles, and how many unread articles there are (not counting split digests!). -r Output a single integer value specifying the number of unread articles, and exit with a 0 status (somebody told me this would be useful). -f format Output the number of unread articles using the specified format. The format is a text that may contain the following %-escapes: %-code resulting output %u "uuu unread articles" %g "ggg groups" %i "is" if 1 unread article, else "are" %U "uuu" %G "ggg" where uuu is the number of unread articles, and ggg is the number of groups with unread articles. For example, the default output format is "There %i %u in %g" which I prefer to the following less perfect format: "There are %U unread article(s) in %G group(s)" FILES
~/.newsrc The record of read articles $db/MASTER The database master index SEE ALSO
nn(1), nngoback(1), nngrab(1), nngrep(1), nnpost(1), nntidy(1) nnadmin(1M), nnusage(1M), nnmaster(1M) AUTHOR
Kim F. Storm, Texas Instruments A/S, Denmark E-mail: storm@texas.dk 4th Berkeley Distribution Release 6.6 NNCHECK(1)
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