FDD SCSI Definition Error
Gene Milligan
Gene_Milligan at notes.seagate.com
Tue Sep 3 14:58:20 PDT 1996
* From the SCSI Reflector (scsi at symbios.com), posted by:
* Gene Milligan <Gene_Milligan at notes.seagate.com>
*
SCSI-2 and SCSI-3 have an error in the control of variable pins for flexible
disc drives. They both have the following definition without the editors note:
Bit 7 6 5 4 Description of pin 4 use
P 0 0 0 Open
P 0 0 1 In use
P 0 1 0 Eject
P 0 0 0 Head load (Editors note: This code should be 100?)
NOTES
1 P is a polarity bit, where 0 is active low and 1 is active high
2 All undefined values are reserved.
Are there any SCSI FDD implementors that know what FDD drives actually did?
Gene
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