User's Manual

IBM POWER/VS AND POWER/VSE TAPE ORGANIZATION
5-2 XEROX LASER PRINTING SYSTEMS TAPE FORMATS MANUAL
Data formats
The data formats are fixed length blocks with variable length records;
no block length fields are present. The record format has a 2-byte
length field, a general purpose byte, a carriage control byte from the
1403 carriage control set, and zero to 132 print characters. (See
figures 5-3 and 5-4 which illustrate block and record formats,
respectively.)
A general purpose byte gives record or block identification; the codes
and functions of this byte are listed and described in table 5-1.
Table 5-1. General purpose byte-codes and functions
Codes Functions
00,01 Normal record
02 3540 (floppy disk) record
04 End-of-data (occurs in the last record of
the last print data block in the file)
08 Break record
0C,0D End-of-block for Version 30.1 of DOS/
VS POWER
10,11 End-of-block for Version 31 of DOS/VS
POWER and subsequent releases
20 End of 3540 records