06.034 How can I discover the volume name of a just booted disk?
Description
This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
06.034 How can I discover the volume name of a just booted disk?
You can discover the name of a ProDOS volume in a drive by doing a CAT.
The volume name will be shown at the top of the screen listing (e.g. "/NARF/").
Another way-- one which works in programs as well as from the keyboard-
- is to use the PREFIX command:
PREFIX
This command will normally return one of two results:
o- If there is an established default prefix, then, the result will be the
current default prefix.
o- If there is no established default prefix, then, ProDOS will read the volume
name of the volume in the default Slot and Drive.
Note: PREFIX used in this way does not establish or change a pathname prefix.
Booting clears any default prefix and sets default Slot/Drive to the boot
drive. For your STARTUP program to discover the name of the volume on which it
resides, it could execute the following:
100 PRINT CHR$(4)"PREFIX": INPUT"";P$
The volume name of the just booted disk (e.g. "/NARF/") will be saved in P$.
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