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Path: utzoo!utgpu!water!watmath!clyde!rutgers!topaz.rutgers.edu!ron
From: ron@topaz.rutgers.edu.UUCP
Newsgroups: comp.arch
Subject: Re: paging in the terminal driver
Message-ID: <16089@topaz.rutgers.edu>
Date: Thu, 29-Oct-87 14:55:29 EST
Article-I.D.: topaz.16089
Posted: Thu Oct 29 14:55:29 1987
Date-Received: Sat, 31-Oct-87 17:05:21 EST
References: <573@elxsi.UUCP> <682@its63b.ed.ac.uk> <796@quacky.UUCP> <421@nuchat.UUCP> <918@sugar.UUCP>
Organization: Rutgers Univ., New Brunswick, N.J.
Lines: 6
Keywords: output pagination

The seperate CPU did little to offload work from the main CPU.
The main reasdon it was there was so DEC didn't have to make
special TOPS-20 tty cards.  They just used the 11/40's UNIBUS.
The machine still passed the characters to the main CPU one at
a time, interrupting on each one.  It's other big job in life
is to print "%DECSYSTEM-20 NOT RUNNING" when the machine is down.