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From: porter@cbmvax.cbm.UUCP (Jeff Porter)
Newsgroups: net.micro.cbm
Subject: Re: using the c64 in a car...
Message-ID: <603@cbmvax.cbmvax.cbm.UUCP>
Date: Sat, 9-Aug-86 22:12:13 EDT
Article-I.D.: cbmvax.603
Posted: Sat Aug  9 22:12:13 1986
Date-Received: Tue, 12-Aug-86 10:05:18 EDT
References: <659@usc-oberon.UUCP> <389@tolerant.UUCP>
Organization: Commodore Technology, West Chester, PA
Lines: 25

> > Is there *any* way to take the c64 and use it in a car?  It needs, what a 
> > 12v and a 9v power supply (or a 9 and a 5?).  Does it really *have* to be 
> 
> A friend of mine is using a vic-20 in his car. He clipped the input cord
> between the transformer and the computer and added a cigarette lighter
> plug to it. NO, it doesn't require AC. the drawback is that the machine
> will run hotter due to having to drop more voltage.
> ----

Let's clear the air here....

The Video Chip and the SID chip in the 64 use the 9vac.  So does the
cassette.  If you are crafty, you could re-do the power supply inside 
the 64 since 12 volts is greater than or equal to what you need
inside.  To get a modem to work will also require a hack to the modem
to get -5v, but I don't suppose you are going to be needing a modem
in your car.

Check over your schematic for a 64 and I think you will see what I
mean.  An out of date, but good enough schematic is in the back
of the 64 programmer's reference guide.  What ever you decide will
require a good 5V @ 2A, and 9VAC @ 1A (or whatever you come up with).

Jeff Porter
Commodore Engineering