(wrong string) – two computers, one drive

From: groepaz_at_gmx.net
Date: Wed, 25 Mar 2020 16:09:19 +0100
Message-ID: <6163052.MDQidcC6GM_at_rakete>
Am Mittwoch, 25. März 2020, 15:44:18 CET schrieb Anders Carlsson:
> silverdr_at_wfmh.org.pl wrote:
> > "It was also possible, without requiring a VIC-switch, to connect two
> > Commodore 64s to one 1541 floppy disk drive ..."
> > 
> > Has anyone tested that? Is that a fully deterministic/reliable behaviour?
> 
> As far as I know, you need to release the CLK (or is it ATN?) line after
> using the drive in order to not lock up the chain:
> 
> C64: POKE 56576,PEEK(56576) AND 239
> Plus/4: POKE 1,PEEK(1) OR 1
> VIC-20: POKE 37137,PEEK(37137) OR 3
> 
> I used to have my Amiga 500 with a parallel cable connected to 1541-II
> and then either a C64 or VIC-20 also connected. By issuing a such POKE
> from the CBM side, I was able to store files on the disk and then load
> it on the target computer.
> 
> A bit clumsy and failure prone if you forget the POKE so you end up in a
> deadlock but for shorter periods of operation it seemed to work.

works fine indeed :) was a popular FAQ for starcommander as well :)

-- 

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<Angela Merkel, CDU>
Received on 2020-05-30 01:20:48

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