User's Manual

XEROX LASER PRINTING SYSTEMS TAPE FORMATS MANUAL 4-1
4. 4IBM DOS/360 POWER II tape
organization
This chapter describes the IBM DOS/360 POWER II tape
organization. It also includes tape format examples and a sample
JSL.
Tape formats
The Xerox/OSS accepts labeled tapes produced by IBM
DOS/360 POWER II, Versions 4.0, 4.1, and 4.2. POWER
II produces tapes with one 20-byte header label, variable
length blocks up to 1024 bytes long, and blocks with
variable length records. Each block is preceded by a 6-
byte prefix which contains the block size in bytes
(including the block prefix). Each record has a prefix
which contains the record length field and carriage control
information.
Block version characteristics (4.0, 4.1, 4.2)
The block Version 4.0 format is shown in figure 4-1.
Figure 4-1. POWER Version 4.0, block format