Booting floppy drives

From: Marko Mäkelä (
Date: 2001-09-04 15:18:25

On Tue, 4 Sep 2001, Ruud Baltissen wrote:

> Studying the source I noticed that the 1540- and early 1541-version had a
> routine to check the state of the data- and clock-line to see if the drive
> had to load and start a certian program.
> - Does anybody know why it is removed?

Probably because of user confusion?

> - Could anybody think of a nice use for our sake?

If I remember correctly, this boot-up check would have an equivalent
effect of issuing the "&" command, which loads and executes a file "&,usr"
in the drive.  The only somewhat useful application of the "&" command
I've seen is a utility somewhere on FUNET that makes it possible to create
subdirectories on the 1541.  The program works by writing one-block
"&xxx,usr" files to the disk and by using other tracks than 18 for the
subdirectories.  When the "&xxx" command is executed, the drive switches
to the subdirectory "xxx" by loading the file "&xxx,usr" that initializes
certain variables in the drive memory.

I think it would be much more useful if the computer had a boot sequence
like the C128 does.

By the way, the 1581 tries to boot from a file.  I think the file name is
something like "copyright 1986 cbm".


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