[comp.os.minix] dosread and big dos 4 partitions

jrw@uncecs.edu (James R. White) (07/27/90)

The 1.5.10 dosread was not able to read my big dos 4 partition.
I believe the only difference between this type of partition and
an ordinary fat16 partition is that the field in the bootblock
containing the number of sectors is zero, and the number of sectors
should be read from the DWORD at 0x20. Here is a patch to do this,
and to change "fat_size" and "totsec" to type long. The result
works fine on my hard disk.

before:
01097  23331 dosread.c
after:
51375  23617 dosread.c

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end