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Path: utzoo!watmath!watnot!watdragon!jsgray
From: jsgray@watdragon.UUCP (Jan Gray)
Newsgroups: net.micro.atari16
Subject: Re: Power supply
Message-ID: <1017@watdragon.UUCP>
Date: Sat, 24-May-86 02:50:39 EDT
Article-I.D.: watdrago.1017
Posted: Sat May 24 02:50:39 1986
Date-Received: Sun, 25-May-86 11:05:20 EDT
References: <8605100658.AA12747@ucbvax.Berkeley.EDU> <3407@ukma.UUCP> <171@sage.cs.reading.Ac.Uk>
Reply-To: jsgray@watdragon.UUCP (Jan Gray)
Organization: U of Waterloo, Ontario
Lines: 16
Summary: 

In article <171@sage.cs.reading.Ac.Uk> gordon@sage.UUCP (Simon Gordon) writes:
>Some people seem to get their facts twisted.

They sure do.

>2) With twice as many ram chips, the MMU must do extra work    holding the
>inputs to the ram chips at their normal voltage. The resisters are therefore
>pull ups and do this job instead.

The resistors go "in series" with the drivers.  Then are not pull up
resistors; rather they are there to minimize undershoot and dampen the
ringing that occurs when driving an inductive/capacitive load.

Still waiting for that replacement power supply,

Jan Gray    jsgray@watdragon    University of Waterloo    519-885-1211 x3870