Hi Bart,
Date: Sun, 11 Sep 2005 18:12:26 +1200 (NZST)
From: Bart Oldeman <[EMAIL PROTECTED]>
[...]
here's a patch which fixes a problem where drives > E: aren't
properly
initialized with a full CDS entry until after all device drivers are
loaded.
RBIL actually says about lastdrive:
21h BYTE number of available drive letters; also size of
current
directory structure array.
For DOS 4.0-6.0: largest of 5, installed block
devices,
and CONFIG.SYS LASTDRIVE=
For DOS 7.x (Windows9X), set to 32 if no LASTDRIVE=
or
LASTDRIVEHIGH=, else set to larger of installed
block
devices and LASTDRIVE(HIGH)=
we always use the 4.0-6.0 method. Technically the FAT32-enabled
kernel
should emulate the DOS 7.x behaviour, and the other one 5.0
behaviour.
But perhaps 7.x behaviour is desirable at all times?
So if we're not initialising drives > E: until all the drivers are
loaded, what are we doing once they are all loaded - initializing the
ones that are used but making the memory for the others available?
Could we not just initialize 26 but still make the memory for the
unused ones > E: available after the drivers are loaded? If we're not
making the memory available, of course, it sounds like there is not
much point in setting LASTDRIVE to anything but 26 :)
Please excuse my cluelessness, I guess I could read the source but I
figure you can answer my questions pretty quickly!
Thanks in advance,
David
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