rtd CMV6486DX100HR, User Manual

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Initiating Virtual Devices by Jumpering Serial Port Pins
Virtual Device mode can also be initiated by shorting two pins on the first or second serial port con-
nector of the cpuModule. This method has a slight disadvantage in that the keyboard, video, and
floppy and hard drives are all redirected to the serial port. To use this method, you must short (con-
nect) two pins on the first serial port connector. The exact procedure is:
• Turn off power to the cpuModule system.
• Make certain the serial port of the cpuModule is configured for RS-232 operation. If
the port is set for RS-422 or RS-485 operation, you cannot start Virtual Devices
mode by jumpering serial port pins.
• Carefully connect the RI and DTR pins (7 and 8) of the serial port connector (refer to
the chapter on Connecting the cpuModule for pin locations).
• Connect the null modem cable between the cpuModule and the host computer.
• Turn on the host computer.
• Start the SERRX.EXE program on the host computer, specifying which serial port of
the host computer you wish to use.
• Turn on the cpuModule system.
The cpuModule system will then boot from the host computer’s disk drives. The drive it boots from
will be the one selected in Setup. Note that if both the PC/104 system and the host computer have
C: disks, the one on the host computer's remains disk C:, while the one on the cpuModule becomes
available as drive D:.