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From: ed@mtxinu.UUCP (Ed Gould)
Newsgroups: comp.unix.wizards
Subject: Re: CYBER word length, a different viewpoint
Message-ID: <270@mtxinu.UUCP>
Date: Thu, 20-Nov-86 14:53:43 EST
Article-I.D.: mtxinu.270
Posted: Thu Nov 20 14:53:43 1986
Date-Received: Tue, 25-Nov-86 20:12:08 EST
References: <197@bsiao.UUCP>
Reply-To: ed@mtxinu.UUCP (Ed Gould)
Organization: mt Xinu, Berkeley, CA
Lines: 20

In article <197@bsiao.UUCP> uh@bsiao.UUCP (Uul Haanstra) writes:
>Cybers and Real Time Computing
>
>I always thougt that the Cyber used 60 bit words so that the counting
>of seconds and minutes would be easier.  ...
>                         The difference between AM and PM can be maintained
>as follows: during AM hours, the CPU runs in user mode; when 12 bits are one,
>issue an XJ and switch to monitor mode, and start the same process.
>
>I may be wrong though...

Except on some models - at least of the 6400 - there wasn't a monitor mode
or an XJ instruction.  It cost an extra $10,000 to have CDC hook up
the wire that allowed XJ.  Oh, well...

-- 
Ed Gould                    mt Xinu, 2560 Ninth St., Berkeley, CA  94710  USA
{ucbvax,decvax}!mtxinu!ed   +1 415 644 0146

"A man of quality is not threatened by a woman of equality."