Re: --- Density ---

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1 total messages Started by C. David Young Thu, 20 Feb 1986 12:42

#2538

Author: C. David Young
Date: Thu, 20 Feb 1986 12:42

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Since there have been two notes expressing disbelief of the "read the
first sector" method to switch drive densities, I feel that I must
respond. How do you think that a drive knows which density to use
beyond sector 3 when it boots a double density drive? I admit I am a little
fuzzy on the matter since it has been a good while since I thought about
it, but I believe that the first byte of the first sector is the flag
that the drive is looking for. I have both a Percom and an ATR8000 and
I know that if the drive is not at the right density to read the disk
that I have just stuck in the drive I can use OMNIMON to read sector 1
and I am then free to read any other sector on the disk.

David Young
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