Hall Research VS-2A - Manual (Page 9)

7
2-Port VGA Switch with Audio & Serial Control
Control Codes
(1 byte commands from external control device)
ASCII 1 (or Hex 31)
Selects input #1 (immediately and unconditionally). The
device will respond with: PC 1 Input selected
ASCII 2 (or Hex 32)
Selects input #2 (immediately and unconditionally). The
device will respond with: PC 2 Input selected
ASCII F (or Hex 46)
Toggles the Front Panel Lock Status. The device will
respond with: Front Panel Locked or Front Panel Un-
Locked
When the Front Panel is locked, no changes can be made via
the front panel buttons except to Unlock the Front Panel.
The Front Panel is Locked or Unlocked by holding the Priority
Selection Button for 3 seconds. All the front panel lights will
flash to signify the change in status.
ASCII A (or Hex 41)
Enters Auto mode. The device will respond with: Auto
mode
In Auto mode, the device automatically switches to the video
& audio input source that is active. “Active” means that video
signal has sync signal, it does not mean there is a non-static
screen!
ASCII M (or Hex 4D)
Enters Manual mode. The device will respond with:
Manual mode
In Manual mode, the device stays on the currently selected
video & audio, regardless of the presence of video signal.