IBM System/370 Manual page 77

Page of GC20-1730-0
Revised 7/14/70
By TNL GN20-2227
• End-of-volume (EOV) routines will support concatenation of data
sets residing on RPS and on non-RPS devices. The control program
will ensure that an RPS access method is used for drives with the
feature and that a non-RPS method is used for drives without it.
• Any system utility, data set utility, or IBM-supplied processing
program {such as a language translator> that uses the sequential
access methods will support RPS. In addition, IEHMOVE, IEBCOPY,
and the initialize/dump/restore utility (IEHDASDR) will include
RPS support for 3330 facilities.
• The Sort/Merge program product supports RPS for 3330 intermediate
work devices.
• Where appropriate, RPS commands for access to SYSRES data
sets will be supported by:
Data set catalog routines
Direct access device space management (DADSM) routines
(for DSCE processing)
STOW, BLDL, and FIND processing of program
library (PDS> directory entries
OPEN/CLOSE/EOV processing of JFCB's
in
the job queue
Routines that access the job queue
Note that RPS command support is not provided for:
Access to TSO swap data sets
Program fetch
The telecommunications access method (TCAM) for message queues
The stand-alone disk initialization and alternate track assign-
ment routines (DASDI and IEHATLAS)
The 2305 facility. The 2305 facility will be supported as an I/O device
for most of the same functions as is 2301 Drum Storage. Note that
specification of exchange buffering for a QSAM data set on either a
2305 or 2330 facility results in a default to simple buffering.
Rotational position sensing for 2305 facilities will be supported
as discussed for the 3330 facility except that an arm positioning seek
is not required on 2305 modules and the 2305 is not supported as an
intermediate work unit by Sort/Merge programs. In addition, the 2305
is not supported by ASP, HASP, or for TCAM message queues. Multiple
requesting will be handled by the I/O supervisor, which will initiate
up to seven channel programs on one 2305 module at a time. (The eighth
logical device address is reserved for control purposes.) Multiple
I/O operations to the same data set will be initiated if the data set
is not being sequentially processed. (One operation must complete
successfully before the next can be initiated during sequential proc-
essing. )
3211 Printer with tapeless carriage. The 3211 Printer, with or
without the 18 additional· print positions, will be supported by QSAM
and BSAM for exactly the same functions as is the 1403 Printer and by
ASP and HASP. The control program will handle loading of the forms
control buffer (FCB) with carriage control images. This support is
similar to that provided for Universal Character Buffer (UCB) loading.
The user can define one or more default FCB images at system
generation time. Two IBM-supplied default images are included
automatically. All other FCB images to be used must be defined by
the user and placed in SYS1.SVCLIB, as is the case with UCB images.
User-supplied default images must be identified as defaults. The FCB
image to be used by a processing program can be specified in the 3211
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