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Apex PDT Technical Reference Manual
3 Hardware Configuration
COAM30002
Rev. 2.00
8/13/02
3-23
BIOS Interrupt 16h - Keyboard
Function 03h –
Set Typematic Rate and
Delay
Input:
ah = 03h
al = 05h
bh = delay value (00h = 250 ms, 01h = 500 ms, 02h = 750
ms, 03h = 1000 ms)
bl = repeat rate (see Notes)
Returns:
Carry Flag clear if successful
Carry Flag set on error
Notes:
q
This function is standard for an AT BIOS but is
documented here for completeness.
q
This function adjusts the repeat rate and delay of the
keyboard for the current session.
q
To set the key repeat rate use the following:
Repeat Rate (keys/sec)
Value passed in BL
30
0
26.7
1
21.8
3
18.5
5
13.3
9
10.0
12
6.0
18
2.0
31
q
These values are NOT the same as for Interrupt 15h,
Function 10h. Other rates are NOT supported by the
Apex PDT BIOS and result in error (Carry Flag set)
on return.
Содержание Apex III
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