Date   : Mon, 16 Jan 1984 16:47:20 EST
From   : David Towson (CSD) <towson@amsaa>
Subject: Re: Function 37

Tony - It is my understanding that CP/M-80 detects a disk change by
noting that the directory information that has been read from the "first"
disk no longer matches the information read from the "second" disk, and that
when this happens we get the familiar (although usually unwelcome) message
"BDOS ERROR R/O", and the system must be reset.  Is this not so ?

Second question:  If a given drive does have the door switch, and I want
to have my BIOS pass the information from this switch to CP/M, what
should the BIOS put where ?


Dave