Re: A parallel interface for PET, VIC-20 and C64/C128

From: William Levak (
Date: 1999-08-05 06:50:30

On Wed, 4 Aug 1999, [ISO-8859-1] Marko Mäkelä wrote:

> So, is it safe to use the DIAG input as a power source, and does it have
> other functions than activating the diagnostic routines?

Not really.  This is a line on the 6520 interface chip.  It is supposed to
deliver enough power to drive a transistor.  I would not count on
it for anything more.  The usual place to get power is from the cassette
port.  +5V is on pin B2 and ground on A1.  It delivers enough power to run
the cassette circuits and the motor.

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