Video Test Generator User Guide 597
Class System Level
Description Initiates the YMODEM-BATCH file-upload protocol.
Customization data stored in a battery-powered NVRAM should be backed-up on a PC so,
if a battery failure or other problem occurs, recovery will be possible without having to
re-enter data by hand.
Restoration can be accomplished in three ways:
• By sending parameters one-at-a-time
• By host port binary data transf er
• By standard YMODEM-BATCH file-upload protocol.
The YMDI command is used to initiate the YMODEM-BATCH file-upload protocol. The
protocol allows one (or more) data structures to be reinstated in the generator from a
binary file. A file contains all instances of a particular type of data. For example, sending
the FORMAT.MEM file to the generator will restore all user-defined formats. Note that you
should not attempt to restore the system parameters by sending SYSTEM.SYS. The
YMDI command internally executes UNPK after all files have been received, so UNPK
does not need to be sent after YMDI. The YMDI command can also be used to change the
firmware in the generator’s flash EPROM via the serial port. This is accomplished by
sending the FIRMWARE.BIN file to the generator using a YMODEM-BATCH. The
generator temporarily places the FIRMWARE.BIN data in picture memory and, if received
intact, eventually transfers this binary image to flash memory by internally executing the
VTOF function. Note that you do not have to send VTOF after a YMDI firmware upload.
Command syntax YMDI filenamesIs this the correct representation of the syntax? It doesn’t match the
example.
filenames
valid YMODEM-BATCH filenames:
DIR.MEM
PATH.M EM
IMAGE.MEM
SEQUENCE.MEM
FONT.MEM
FORMAT.MEM
FIRMWARE.BIN