|
| |
INT 21 - DOS 4.0 - EXTENDED OPEN/CREATE
|
Input |
DOS1 |
N |
DOS3 |
N |
DOS4 |
Y |
DOS5 |
Y |
Output |
|
AX |
6Ch |
00h |
File
Handle / Error Code |
AX |
|
BX |
Open
Mode |
|
|
BX |
|
CX |
File
Attributes |
Action
Taken |
CX |
|
DX |
Action
Flag |
|
|
DX |
|
DS:SI |
ASCIIZ
File Name |
Set
if Error |
CF |
| Open
Mode |
| Bit |
Dec |
Hex |
Description |
| 0 |
1 |
0001h |
Access: 000
= Read Only
001 = Write Only
010 = Read / Write |
| 1 |
2 |
0002h |
| 2 |
4 |
0004h |
| 3 |
8 |
0008h |
Reserved |
| 4 |
16 |
0010h |
Compatibility:
000 = Compatibility
001 = Deny All
010 = Deny Write
011 = Deny Read
100 = Deny None |
| 5 |
32 |
0020h |
| 6 |
64 |
0040h |
| 7 |
128 |
0080h |
Not passed to Child |
| 8 |
256 |
0100h |
Reserved |
| 9 |
512 |
0200h |
| 10 |
1024 |
0400h |
| 11 |
2048 |
0800h |
| 12 |
4096 |
1000h |
| 13 |
8192 |
2000h |
Return error i.s.o. INT
24h |
| 14 |
16384 |
4000h |
Auto commit on Write |
| 15 |
32768 |
8000h |
Reserved |
| Action
Flag |
| Bit |
Dec |
Hex |
Description |
| 0 |
1 |
0001h |
Exists: 0000
= Fail
0001
= Open
0010
= Replace |
| 1 |
2 |
0002h |
| 2 |
4 |
0004h |
| 3 |
8 |
0008h |
| 4 |
16 |
0010h |
Not
Exists: 0000 = Fail
0001 = Create |
| 5 |
32 |
0020h |
| 6 |
64 |
0040h |
| 7 |
128 |
0080h |
| 8 |
256 |
0100h |
Reserved |
| 9 |
512 |
0200h |
| 10 |
1024 |
0400h |
| 11 |
2048 |
0800h |
| 12 |
4096 |
1000h |
| 13 |
8192 |
2000h |
| 14 |
16384 |
4000h |
| 15 |
32768 |
8000h |
Action Taken:
01h = File existed and was opened
02h = File did not exist, created
03h = File existed, was replaced
See Also File Attributes Error Codes |