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Simtel MSDOS 1992 June
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SIMTEL_0692.cdr
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msdos
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keyboard
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atkbrate.arc
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KBRATE.DOC
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1986-09-04
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---------------------------------------------------------------------------
KBRATE -- Set PC-AT Keyboard Auto-repeat Rate and Initial Delay
---------------------------------------------------------------------------
Version 1.01, 31 January l985
KBRATE.COM is a program which adjusts the auto-repeat rate and initial
delay for the keyboard of an IBM PC-AT. It is invoked by the following
command:
C>KBRATE xy
"x" is one of the letters A through Z. It gives the repetition rate in
characters per second, according to the following table:
A 30.0 N 9.2
B 26.7 O 8.6
C 24.0 P 8.0
D 21.8 Q 7.5
E 20.0 R 6.7
F 18.5 S 6.0
G 17.1 T 5.5
H 16.0 U 5.0
I 15.0 V 4.6
J 13.3 W 4.3
K 12.0 X 4.0
L 10.9 Y 3.7
M 10.0 Z 3.3
"y" is one of the numerals 1 through 4. It gives the time delay between a
key's first depression and the start of its repetition, in units of a
quarter of a second.
There may multiple spaces preceding "xy" but there must be no space between
"x" and "y".
This program runs ONLY on an IBM PC-AT (although there is no internal test
for this). It sends commands to the keyboard's internal microprocessor to
set the rate and delay. The default values which are established after a
system reset are a rate of 10 characters per second and a delay of 500
milliseconds, which corresponds to an "xy" value of "M2". The program does
not remain resident nor does it alter any data in the BIOS working RAM
storage, so it should be entirely transparent to programs which are
intimate with the keyboard or which replace the normal BIOS keyboard
interrupt handler. It can be invoked from the AUTOEXEC.BAT file to set the
desired rate whenever DOS is started or at any time thereafter.
KBRATE.COM is copyright (c) 1985 by Robert F. Morse. Permission is hereby
given for private non-commercial use only. Kudos and brickbats should be
directed to:
Robert F. Morse
17 Bowdoin Street
Cambridge, MA 02138
(617) 864-4250
DTN 223-6720
MLO5-2/B6
LEWS2::MORSE