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SERVSWITCH™ AND SERVSWITCH ULTRA™
4.3.11 S
ET
K
EYBOARD
T
YPEMATIC
(IBM
AND
M
ULTIPLATFORM
M
ODEL
S
ERV
S
WITCHES AND
IBM C
OMPATIBLE
K
EYBOARDS
O
NLY
)
Most IBM type keyboards have an internal seven-bit “typematic” setting which
governs the way the keyboard responds when you hold a key down to force it to
repeat. (Apple and Sun keyboards have no typematic features, so Mac only and
Sun only ServSwitches do not support this command at all, and multiplatform
Switches with Mac or Sun shared keyboards attached will just ignore it.) The five
“low” bits of this setting represent the rate at which the key repeats; the two “high”
bits represent the delay after you begin holding down the key before it begins to
repeat. Sometimes a keyboard’s typematic setting isn’t suitable for a given operator
or for a given application. To change the shared keyboard’s typematic setting, issue
the Set Keyboard Typematic command: Press and release the left Control key, type
[A] followed by the desired “typematic value,” and press [ENTER]. The “typematic
value” is the decimal equivalent of the binary seven-bit typematic setting: While the
typematic setting = delay bits + rate bits, the typematic value = decimal delay value +
decimal rate value (see Table 4-6 below and Table 4-7 on the next page). For
example, to set the shared keyboard to register a key 16 times per second after the
key has been held down for half a second (typematic value = 7 + 32 = 39), enter
[CTRL] [A] [3] [9] [ENTER].
Table 4-6. Typematic Delay
Decimal Binary Delay Before Key Repeats
Value Bit Values
0 00[xxxxx] 1/4 second (250 ms)
32 01[xxxxx] 1/2 second (500 ms)
64 10[xxxxx] 3/4 second (750 ms)
96 11[xxxxx] 1 second (1000 ms)