HP 220240 - Manual (Page 228)

RIS—Reset to Initial State
ESC c Resets the printer to initial state values and returns to DEC PPL3 protocol.
ROCS—Return from Other Coding System
ESC % @ Returns to DEC PPL3 from an alternate protocol emulation mode.
SOCS—Select Other Coding System
ESC % 8 Selects HP PCL emulation mode.
ESC % / 4
Selects PostScript interpreter mode (PostScript protocol).
ESC % =
Selects IBM ProPrinter emulation mode.
ESC % <
Selects CaPSL emulation mode.
SnC1R—C1 Receive Mode
CSI SP 6 Interprets C1 as C0.
CSI SP 7 Interprets C1 as C1.
DEClaser Printer Quick Reference Guide A–27