Re: Boot sector parameter table tricks

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1 total messages Started by Ralf.Brown Wed, 25 Jul 1990 13:45

#1681

Author: Ralf.Brown
Date: Wed, 25 Jul 1990 13:45

13 lines
1235 bytes

}P.S. Does anyone know what the "NON-IBM" bit actually does in the attributes of
}a block device? Does anything use it?

If clear, DOS passes the driver a pointer to the first sector of the FAT
for the "Build BPB" call.  If set, it passes a pointer to a scratch
buffer with which the driver may do anything it pleases.  The upshot is
that drivers without the "NON-IBM" bit can not support multiple media
whose first FATs start at different locations on the disk.
--
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