HP Vectra Technical Reference Manual page 260

Example:
MOV CX,3
UNTILJETRIEO:
PUSH
CX
MOV AH,F13_RO__SECTORS
MOV AL,1
MOV OL,O
MOV OH,O
MOV CH,O
MOV CL,4
PUSH CS
POP ES
MOV BX,200H
INT 13H
POP
CX
JNC NO_ERROR
MOV AH,F13_RESET-.DISC
INT 13H
LOOP UNTIL_RETRIED
F13_WIL.SECTORS
(AH = 03H)
; retry count
; save retry count
; read a sector
; transfer 1 sector
; Driver A:
; head 0
; track 0
; sector 4
; use current code segment
; as the segment of the data
; buffer offset 200H
; call disc drivers
; restore retry count
; exit, all OK!
; reset all drives
,. call disc drivers
; loop till no count,no error
; report error is real to
; application/user
This function parallels the read function. Data is written from memory to the disc. See the
description of the F13_RD_SECTORS function above.
Disc 251