Epson Printer Interface Cartridge for the Apple IIc Operation Manual page 97

ESC s
Format:
ASCII code:
Decimal:
Hexadecimal:
Comments:
n = 1 selects the mode
n = 0 cancels it.
DEL
Format:
ASCII code:
Decimal:
Hexadecimal:
Comments:
Removes the last text character in the print buffer but does not
affect control codes. It cannot be guaranteed in the italic mode. Not
valid in NLQ.
ESC
27 115
1B
73
DEL
127
7 F
Select Half-Speed Mode
(n)
(n)
(n)
Delete Character
C-27