IOGear GCS1644 v1 - Manual (Page 22)

Hotkey Description
Press and hold [Num Lock] ([Clear] key on 1.
Mac keyboard)
Press and release [-]
2.
Release [Num Lock] ([Clear] key on Mac 3.
keyboard)
Invoking hotkey setting mode
Invoke HSM, then press [h] Change the HSM invocation keys from [Num Lock] to
[Ctrl] and from [-] to [F12]
Invoke HSM, then press [t] Switch port switching hotkey sequence between
[Scroll Lock] [Scroll Lock] and [Ctrl] [Ctrl]
Invoke HSM, then press [F2] Enables Mac keyboard emulation
Invoke HSM, then press [F3] Enables Sun keyboard emulation
Invoke HSM, then press [F10] Auto-detect the keyboard operating platform (for
PC compatible systems). Activates Pass Through
Keyboard Mode (keystrokes are sent directly to the
computer instead of through the Mac emulator).
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Hotkey Setting Mode (HSM)