Black Box KV3000 User Manual download pdf (Page 45)

SERVSWITCH™ AND SERVSWITCH ULTRA™

4.3.7.A Keyboard Types (IBM Type Keyboard Only)

At the time of this writing, there are two basic types of keyboards most commonly

used with IBM PS/2 and PC/AT compatible computers. The older type, standard

for several years, has either 101 or 102 keys depending on which country and

language it was designed for. The newer type, originally developed by Microsoft, is

designed for use with machines running Windows 95 or Windows 98; it has three

additional Windows specific keys (the left and right Start keys and the App

[application] key), for a total of 104 or 105 keys.

The newer 104/105-key keyboard is now the default shared-keyboard setting for

the ServSwitch. Send a Set Keyboard/Mouse command to change the shared-

keyboard type if you are using a 101/102-key type shared keyboard, or if you have

been using a 101/102-key keyboard and are swapping it out for a 104/105-key

keyboard. (If you have a Sun or Apple keyboard attached to the ServSwitch and

you send it a Set Keyboard/Mouse command that attempts to change the shared-

keyboard type, the command will be ignored.)

4.3.7.B Mouse Types (IBM Type Mouse Only)

IBM compatible CPUs can use several types of mice as well. The ServSwitch

supports three of these (on both its input and output sides): PS/2 (including PS/2

wheel), Microsoft serial, and PC Mouse (Mouse Systems).

PS/2 mice have a 6-pin mini-DIN connector; their interface is similar to that of

the PS/2 keyboard. The advantage of the PS/2 mouse is that its I/O circuitry is

built onto the CPU’s motherboard and doesn’t occupy any of the CPU’s serial

ports. PS/2 mice come in two varieties: an older style that has only buttons, and a

newer “wheel mouse” style—developed by Microsoft and introduced with its

IntelliMouse™—that has a clickable wheel (instead of a center button) between its

left and right buttons; you can use this wheel to scroll through menus (among

other things). PS/2 is the factory-default shared-mouse setting for the ServSwitch.

Serial mice all use the TIA RS-232 serial standard, implemented on either a

DB25 or a DB9 connector, and communicate with the PC at a data rate of

1200 bps. There are two common serial-mouse types: Microsoft serial mice use a

3-byte/7-bit protocol; unlike the other two types of mice you can choose from, they

do not support a third button. PC Mouse (also known as Mouse Systems) serial

mice use a 5-byte/8-bit protocol; many lower-cost mice have a switch that you can

set for either Microsoft compatible operation or PC Mouse compatible operation.

The Switch will always autodetect the presence of a PS/2 mouse (with or without

the wheel), and it will autodetect if you change from a PS/2 mouse to a Microsoft

serial mouse. Send a Set Keyboard/Mouse command to change the Switch’s

shared-mouse type setting if you are using a PC Mouse serial mouse, or if you

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Black Box KV3000 User Manual Page 45