INT 13 - DISK - READ SECTOR(S) INTO MEMORY
AH = 02h
AL = number of sectors to read (must be nonzero)
CH = low eight bits of cylinder number
CL = sector number (bits 0-5)
high two bits of cylinder (bits 6-7, hard disk only)
DH = head number
DL = drive number (bit 7 set for hard disk)
ES:BX -> data buffer
Return: CF set on error
if AH = 11h (corrected ECC error), AL = burst length
CF clear if successful
AH = status (see AH=01h)
AL = number of sectors transferred
Notes:  errors on a floppy may be due to the motor failing to spin up quickly
enough; the read should be retried at least three times, resetting
the disk with AH=00h between attempts
AWARD AT BIOS extended to handle more than 1024 cylinders by placing
bits 10 and 11 of the cylinder number into bits 6 and 7 of DH
SeeAlso: AH=0Ah

See also: 1303

1302 - DISK - READ SECTOR(S) INTO MEMORY