aek at bitsavers.org
Wed Dec 21 20:51:02 CST 2005
To get back to disk imaging, I may be stupid, but I do wonder if it's
actually possible to write such a program to run under linux or any other
It is relatively easy to write a program to dump an image back to a
physical disk. I've done similar things several times for specific disk
formats (in particular TRS-80 M2/M4 and HP LIF). To do the reverse -- to
imagge a disk _once the format is known_ is also easy.
The problem comes with discovering the format. I've read and re-read the
8272 and 765 data sheets. From what I can see the only way to see what
sectors are on the current track is to use the ReadID command. This
returns the ID bytes from the next sector header to pass under the head.
There is no way to automatically dump all the IDs from all the sectors
from index pulse to the next index pulse (if there is, can somebody
please enlighten me).
Look at the readfloppy code in Eric's DMK library
It is capable of detecting sector length automagicly under Linux.
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