Tandy 1000 SL Technical Reference Manual page 256

SET
TYPEMATIC RATE/bELw
-
F3 Hex
T h i s camand c o n s i s t s of one ccmnnand byte and one paramter
byte. The keyboard Acknowledges t h e
conmand
byte, stops scanning
t h e
matrix,
and
waits for
t h e parameter byte. Upon r e c e i v i n g t h e
parameter byte, t h e keyboard sends an Acknowledge, sets t h e
typematic
rate and d e l a y as i n d i c a t e d i n Table 2,
and continues
scanning t h e matrix.
I f another
c c p n m a n d
is received
i n s t e a d of t h e paranreter byte,
t h e
set
typematic rate/delay f u n c t i o n ends w i t h no change
to
t h e
e x i s t i n g rate or d e l a y parameters. The new
ccpnnand
is processed
and t h e keyboard continues scanning t h e
matrix,
The parameter byte c o n s i s t s of an e i g h t - b i t word w i t h b i t 7
(mst s i g n i f i c a n t b i t ) always being set, B i t s
0-4
set
t h e
typenatic rate and b i t s 5-6 set t h e d e l a y ,
1 0 1 0 1
0 1 1 P a r a m t e r
B y t e
7 6 5 4 3 2
1
0 B i t N u n b e r
The above exanple shuws t h e d e f a u l t 10.9
cps
typematic rate and
500 microsecond delay. B i t s
0-4
(010111) correspond to t h e rate
of 10.9
cps
s h a m on Table 2 ii and b i t s 5-6 (01) correspond to
t h e 500 microsecond d e l a y shown i n Table 2 i.
See Table 2
for Typematic Rate/Delay values other than t h e
d e f a u l t s e t t i n g s ,
17