Reserved Codes - Xerox 4215 Reference Manual

DSC AND SCS DATA STREAM COMMANDS
Null (NUL)

Reserved codes

2-4
00
This control code does not cause any printer function. In
unformatted mode, the printer treats this code as a space for
both print and nonprint fields. In formatted print or nonprinted
fields, a null character is printed.
00 Control sequence of a Null command
04
06
07
These control codes in an unformatted print field, unformatted
non-print field or a formatted print field are printed as a space
character. In a formatted nonprint field, they are printed as a null
character.
04 Control sequence of a Stop command
06 Control sequence of a Space or a Null command
07
XEROX MRP FAMILY COAX COMMAND REFERENCE