back2root:ibm-pc-ms-dos:interrupts:int_21:int_21_3d

Table des matières

Request/Call:
- open mode
  - Access Mode
  - sharing mode
Return:
Notes & Comments

Ceci est une ancienne révision du document !

INT 0x21 - 0x3d - Open File or Device Using Handle

Request/Call:

reg	value	descr
AH	0x3d
AL		Mode (see below)
DS:DX		pointer to ASCIIZ file name

Return:

CF is cleared : success

reg	descr
AX	File Handle

CF is set: error

reg	descr
AX	error code (see DOS Error Code)

Notes & Comments

will open normal, hidden and system files
file pointer is placed at beginning of file

back2root/ibm-pc-ms-dos/interrupts/int_21/int_21_3d.1705257337.txt.gz · Dernière modification : 2024/01/14 19:35 de frater