User`s manual

Epson FX Emulation9–52
Delete Character
ASCII Code DEL
HEX Code 7F
Purpose Deletes the previous character on a line.
Comment This command is ignored if it occurs immediately after a CR, a
paper motion command, or if a justification mode of ESC a 3 is
set (emulates a DFX–8000.) Characters truncated due to line
length restrictions are not affected by this code.
Pass Bit 7 from Host
ASCII Code ESC #
HEX Code 1B 23
Purpose Passes bit 7 (the eighth and most significant bit) whether it is 1 or 0,
thereby cancelling ESC > and ESC =.
Comment This command affects only text and control code data; bit 8 of
graphics data is always passed through.
Clear Bit 7 of Incoming Data Bytes to 0
ASCII Code ESC =
HEX Code 1B 3D
Purpose Sets the most significant bit (MSB) of all incoming data to 0.
Comment The MSB is bit number 7. This command only affects text and
control code data. Graphics data pass through unchanged. Some
applications always set the MSB of print data to one (1), which
results in italic or graphics printing in Epson printers. This command
overcomes the problem.