Overlay - Matrox Morphis QxT Installation And Hardware Reference

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There are three main timers that make up the Watchdog circuitry:

• Warning timer. If, during the course of regular operations, the Host computer

does not reset the warning timer before the specified interval expires, it is assumed

to have hung. The Watchdog's warning timer will then generate a warning

interrupt.

• Timeout timer. If, during the course of regular operation, the Host computer does

not reset the timeout timer before the specified interval expires, it is assumed to

have hung. The Watchdog's timeout timer will then force the Host computer to

reboot.

• Reboot timer. If, during a reboot, the Host computer does not start regular

operations before the specified interval expires, the Host computer is assumed to

have hung. The Watchdog's reboot timer will then force the Host computer to

reboot again.

You can enable the Watchdog circuitry and set and reset the Watchdog timers

using the MIL-Lite MsysControl() function. You can hook an event handler

function to the warning interrupt using MsysHookFunction().

Overlay

The overlay processor can overlay information onto grabbed images. The overlay

operation can be done before the image is sent to the MPEG-4 encoder, or before

the image is sent to the Host. The overlay processor can block part of the source

image, or blend information with the image (with a programmable alpha factor),

using the MIL-Lite MbufTransfer() function.

Overlay

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