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@REPLYADDR Oliver Schmidt <ol.sc@web.de>
@REPLYTO 2:5075/128 Oliver Schmidt
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Hi Colin,
>This is in fact extremely easy: you just fopen("/PREFIX/FILENAME") and
>it finds the correct drive all by itself :)
Yes, ProDOS is about volumes and paths, not about slots and drives.
However, if you have to access a certain drive then the way to do it
is this:
1. Calculate the device number according to the formula
device = slot + (drive - 1) * 8
(
https://cc65.github.io/doc/apple2.html#ss9)
2. Call getdevicedir() with the device from 1.
(
https://cc65.github.io/doc/funcref.html#ss3.135)
3. Construct an absolute path from 2. or call chdir() with 2.
If you want to return where you`ve been before calling chdir(), you
can call getcwd() before chdir().
In general, you might want to have a look at
https://github.com/cc65/cc65/blob/master/samples/enumdevdir.c
Regards,
Oliver
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