Int 11  - Columbia Data Products Standard Device Level Protocol (sdlp) 1.  [d]

   SI = 6A6Ah
   AH = command (see below)
   AL = SCSI Addressing
       bits 2-0 SCSI Target LUN (logical unit number)
       bits 5-3 SCSI Target ID
       bits 7-6 Host Adapter

Return: CF clear if successful
       DI = 6A6Ah if AH=01h on entry (maybe for all functions???)
       AH = ??? for command 01h
   CF set on error
       AL = error code

See Also: INT 21/AX=4402h"ASPI"

Values for SDLP command:
 00h   SDLP initialization
 01h   SDLP System Identify
 02h   simple read sectors
 03h   simple write sectors
 04h   simple verify sectors/seek to sector
 05h   get device size/type
 06h   ready unit
 07h   format unit
 08h   diagnostics
 09h   rewind
 0Ah   erase
 0Bh   write filemarks
 0Ch   space
 0Dh   prevent/allow media removal
 0Eh   load/unload media
 0Fh   reserved - returns good status
 10h   set block size
 11h   write setmark
 12h   set error level
 13h   get address of Request Sense Buffer
 14h   get SDLP error via Request Sense
 F0h   Vendor Unique Function (WD7000-FASST2 only)
 FDh   reset current SCSI HAC
 FEh   get/set current SCSI HAC
 FFh   execute SCSI command