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INT 15 - SYSTEM - WAIT ON EXTERNAL EVENT (CONVERTIBLE)
|
Input |
Output |
|
AX
|
21h |
Condition |
|
|
AX |
|
BX
|
Compare / Mask |
55ms Timeout |
|
|
BX |
|
CX
|
|
|
|
|
CX |
|
DX
|
I/O
Port (if bit 4 set) |
|
|
DX |
| ES:DI |
User
Byte (if bit 4 clear) |
|
ES:DI |
| Condition
Type |
| Bit |
Dec |
Hex |
Description |
| 0 |
1 |
01h |
Condition: 000
= Any external event
001 = Compare, return if equal
010 = Compare, return if not equal
011 = Test, return if not zero
100
= Test, return if zero |
| 1 |
2 |
02h |
| 2 |
4 |
04h |
| 3 |
8 |
08h |
Reserved |
| 4 |
16 |
10h |
1 = Port
Address, 0 = User Byte |
| 5 |
32 |
20h |
Reserved |
| 6 |
64 |
40h |
Reserved |
| 7 |
128 |
80h |
Reserved |
|