Black Box SW627A-R2, SW628A-R2 4. Typematic Delay, Operation, 00xxxxx, 01xxxxx, 10xxxxx, 11xxxxx

CHAPTER 4: Operation

4.3.11SET KEYBOARD TYPEMATIC

Most IBM PC 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. 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 typematic setting of your station’s shared keyboard, 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 4-4 below and Table 4-5 on the next page). For example, to set your 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), type [CTRL] [A] [3] [9] [ENTER]. Enter the Keep Settings command after you enter this command.

Because Apple computers do not support the typematic feature, this setting will have no effect when you are working with the attached Mac CPU(s).

Table 4-4. 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)

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