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Section A:
System interface
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27 - Get Allocation Vector
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On entry:
c
DE
On return: HL
lBH
Address of allocation vector or 0FFFFH
Possible logical errors:
- none -
Possible physical errors:
- none -
Differences to CP/M plus:
Physical errors can occur.
Differences to CP/M 2.2 resp. DiCOS:
- none -
This function returns the beginning address of the allocation vector
of
the current drive. The ••allocation vector" is a bit vector, where begin-
ing with the most significant bit of the first byte, each bit denotes an
allocation cluster. If the bit is set, the corresponding cluster on disk
is occupied.
The
allocation vector should not be used to determine the space remain-
ing on a drive, as it can be placed in a different memory bank. For this
purpose,
function 46 should be called,
which is used by all
auxiliary
programs of EOS.
If
no current drive has yet been defined,
the definitons are read.
In
case
of physical errors during execution of this function,
HL will
be
set to 0FFFFH on return.
EOS System manual
Daeumling & Zimmermann
Page 63
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