User's Manual

DEC PDP-11 TAPES
XEROX LASER PRINTING SYSTEMS TAPE FORMATS MANUAL 15-5
The horizontal tab (octal 11) is set to every eighth position (8, 16, 24,
etc.). When a tab is encountered, spaces are generated to the next
tab position.
Points to note
The following guidelines pertain to the DEC PDP-11:
• The data must be in ASCII. The data extraction process
assumes that the control codes (carriage-related as well as null
and horizontal tab) are in ASCII. Specifying a different code
(VOLUME CODE=) does not modify the control codes for which
the software is searching.
• The initial reference point from which a report performs its first
carriage control function is bottom-of-form (BOF). If it is
necessary to override this default, a PCC user table should be
created and then referenced in the appropriate LINE command.
In the special PCC table, the INITIAL=TOF left-right part may
be used to change the default.
• The second parameter of the DATA= specifies the number of
bytes to be selected for printing on a given line. If the record is
longer than that value, the remaining characters are printed on
the following line.
• HOST=RSX-11 does not automatically process all the possible
formats that might be created on a DEC (or equivalent)
computer. It is intended to process only those tapes in the “FLX”
format.
• One special aspect of the processing associated with RSX-11
is that an attempt is made to eliminate blank pages that may
Table 15-3. DEC PDP-11 control codes
Carriage related
Octal Hex Interpretation
12 0A Line feed (print and space 1)
13 0B Vertical tab (print and skip to channel 7)
14 0C Form feed (print and skip to channel 1)
15 0D Carriage return (print, without spacing)
20 10 Print and skip to channel 2
21 11 Print and skip to channel 3
22 12 Print and skip to channel 4
23 13 Print and skip to channel 5
24 14 Print and skip to channel 6
Other functions
Channel Set of line numbers Purpose
00 00 Null
11 09 Horizontal tab (Move to the
next multiple of 8 bytes.)