User's Manual

HONEYWELL TAPES
XEROX LASER PRINTING SYSTEMS TAPE FORMATS MANUAL 10-17
The Record Control Word (RCW) is the first word of each logical
record. It is structured as shown in table 10-14
Data format with embedded control characters, normal edit mode (4 x 3 packed BCD)
Embedded control characters appear within the print line image and
may appear singly or in pairs. These control characters must be
processed on a left-to-right scan basis.
Note: Hexadecimal character codes have the 6-bit octal character
in the rightmost six bits with the leftmost two bits set to zero, for
example, the unpacked data format. References to character codes
refer to the character value prior to translation to EBCDIC.
Table 10-14. Honeywell 600/6000 record control word
format
Character
position(s)
Bits Description
1-3 0-17 Record size is the size of the record in words (6 characters/word), not including this
record control word RCW (octal).
4 18-19 Next available character position in the last data word:
00: full word (4 characters) used
01: 1 character used
10: 2 characters used
11: 3 characters used
4 20-23 Not used unless bits are zero.
5 24-29 Logical record media code.
0: not a media conversion record, or no printer slew controls
1: binary card image
2: Hollerith card image
3: print line image
4: reserved for user
5: time-sharing system ASCII
6: standard system format ASCII
7: ASCII print line images, with trailing printer slew control information
8: TSS information record
6 30-35 Report code identifying this record as one belonging to a specific report or punch deck.
May be any combination of 6 bits.
Note: The printing system automatically selects records with media codes 02, 03, and 07 for printing.