Compuprint 9058 Programmer Manual - Manual (Page 60)

EPSON/IBM Mode
A78408098-003 58
DEL
Deletes the last character. (EPSON)
ASCII Code DEL
Hexadecimal Value 7F
Decimal Value 127
This command causes the printer to delete the last printable character
sent to the printer. Printer control codes are not affected. The printer
ignores this command if it follows a command that moves the horizontal
print position (ESC $, ESC \ or HT).
ESC #
Cancels MSB control. (EPSON)
ASCII Code ESC #
Hexadecimal Value 1B 23
Decimal Value 27 35
This command cancels any controls on the MSB (bit number 7) set by
ESC = or ESC > commands; printer then accepts all MSB data as is.
ESC =
Sets MSB to 0. (EPSON)
ASCII Code ESC =
Hexadecimal Value 1B 3D
Decimal Value 27 61
This command sets the Most Significant bit (bit number 7) of all
incoming data to 0. All data is affected including graphics data.