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AH = 12h AL = subfunction 00h start disk 01h stop disk CX = wait flag 00h wait for ready 01h don't wait for ready DL = hard drive ID (bit 7 for hard disks must be set)
Return:
CF set on error CF clear if successful AH = status 00h successful 01h invalid function request 80h timeout
See Also: AH=12h"Future Domain" - AH=13h"SyQuest"
Category: Disk I/O Enhancements - Int 13h - S
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