int 16h
AH = 03
AL = 00 set typematic rate to default
01 increase initial delay
02 slow typematic rate by 1/2
04 turn off typematic chars
05 set typematic rate/delay
BH = repeat delay (AL=5)
0 = 250ms 2 = 750ms
1 = 500ms 3 = 1000ms
BL = typematic rate, one of the following (AL=5)
00 - 30.0 01 - 26.7 02 - 24.0 03 - 21.8
04 - 20.0 05 - 18.5 06 - 17.1 07 - 16.0
08 - 15.0 09 - 13.3 0A - 12.0 0B - 10.9
0C - 10.0 0D - 9.2 0E - 8.6 0F - 8.0
10 - 7.5 11 - 6.7 12 - 6.0 13 - 5.5
14 - 5.0 15 - 4.6 16 - 4.3 17 - 4.0
18 - 3.7 19 - 3.3 1A - 3.0 1B - 2.7
1C - 2.5 1D - 2.3 1E - 2.1 1F - 2.0
returns nothing
- if the typematic rate is not within range,no action is taken
- available on AT and PS2 machines with extended keyboard support