Toshiba 4679 User Manual page 33

6-4-3. Hexadecimal Dump Mode
Each of the signals sent from the computer to the printer will be printed out in hexadecimal code.
This function allows you to check if a control code sent to the printer by the program being
used is correct or not. The last line is not printed if its data is less than one full line. However,
if the FEED switch is pressed, the last line will be printed. To turn off the mode, it is necessary
to turn off the printer completely.
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