Re: VIC-1541 problem

From: Marko Mäkelä (
Date: 2006-12-15 12:02:48

On Fri, Dec 15, 2006 at 07:45:39AM -0300, Andrew Wiskow wrote:
> Well, for anyone who may care, my problem has been
> solved!  I tried changing out the 901229-03 ROM chip
> in the VIC-1541 with a 901229-05 ROM chip, and now the
> drive works perfectly!  This had be scratching my head
> for quite a while, so I'm so happy that it's working
> now.  :-D

Very interesting.  What were the exact symptoms?  Did you
try the drive with a Vic-20 in a multi-device setup?

you can read my characterization of the 901229-03 firmware:

'The firmware of an old-style 1541 with long board. This ROM has an
autobooting feature: if CLK and DATA are held low during bootup, the
drive will wait for them to raise, and execute a "&*" command.'

You can also obtain 901229-01 and 901229-02 from that location.
I never come across to a 901229-04.


       Message was sent through the cbm-hackers mailing list

Archive generated by hypermail pre-2.1.8.