INT 13h,  10h (16)       Test for Drive Ready                      fixed disk

Tests to see if the fixed disk drive is ready. This service can be
performed on fixed disks only.

On entry:      AH         10h
DL         Drive number (Bit 7 must be set)

Returns:       AH         Status of operation (See Service 01h)
CF         Set if error, else cleared

                                                                          

Notes:         If the fixed disk drive is ready, then AH is 0 and
the Carry Flag is clear.

For the AT, XT-286, and PC Convertible, the BIOS
executes INT 15h, Service 90h (Device Busy), for the
diskette (Type = 01h) and the fixed disk (Type =
00h) prior to waiting for the interrupt. INT 15h,
Service 91h (Interrupt Complete), is executed upon
completion.

See also: INT 13h, 01h

INT 13h, 10h (16) Test for Drive Ready fixed disk