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0040h:0017h Keyboard Shift Status
| Keyboard
Shift Status |
| Bit |
Dec |
Hex |
Description |
| 0 |
1 |
01h |
Right SHIFT pressed |
| 1 |
2 |
02h |
Left SHIFT pressed |
| 2 |
4 |
04h |
CTRL pressed |
| 3 |
8 |
08h |
ALT pressed |
| 4 |
16 |
10h |
SCROLL locked |
| 5 |
32 |
20h |
NUM locked |
| 6 |
64 |
40h |
CAPS locked |
| 7 |
128 |
80h |
Insert locked |
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