Re: 9V AC needed for C64? (C128 and serial bus q)

From: Cameron Kaiser (
Date: 1998-09-04 18:24:52

>I also picked up a French Amstrad 464plus (sorry guys ;-) which has that
>AZERTY layout but the BASIC ROM cartridge has an English keyboard mapping.
>(oh dear)


>Quick question: what's the maximum number of Commodore computers that can
>be on the IEC bus? I'm using the serial bus as a way of networking C64s
>but since each one has a pullup resistor on the serial bus bits, the line
>drivers (7406 open collector hex invertors) will only be able to support a
>few, much less than disk drives. Can I get away with 6 or 8 machines?

Nicolas Welte calculated 30, but with the pullups I don't know. Even six or
eight sounds high (what's their resistance?).

Cameron Kaiser *** ***
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