IBM System/370 145 Manual page 219

• Installation of time sharillLg, using the Interactive Terminal
Facility (ITF)--a partitioDl size of approximately 40K is required to
handle 10 to 12 terminals
• Implementation of DATA/360--o0S for data entry and verification
operations, using 2260 Display Stations instead of keypunches and
verifiers
• Installation of GPSS (Genez'al Purpose Simulation System)
• Installation of IBM-supplied application-oriented programs (Type II
and program product)
Model 145 DOS Version 4 usez's can also take advantage of new DOS
facilities such as:
• Use of the time of day
cloc~k
for more precise time of day values
• Multiple core image libraries for executable program (program phase)
residence instead of a sing'le library. Each batched partition in
the system can have a private core image library assigned.
• The ability to compile source programs, link-edit ,object modules,
and execute certain system service programs in batched foreground
partitions. Previously, these functions could be performed only in
the background partition. Most IBM-supplied language translators
(Type I and program product) can be executed in a batched foreground
partition, as can CSERV, MAINT, and DSERV service programs.
• Data file protection at open time for disk files to prevent
unauthorized access to data by programs
• Problem determination aids (dumps, traces, etc.) that are designed
to identify a system fail,ure as one of three types--a system
hardware error, a system programming error, or a user error--so that
the failure can be pinpoint<ed and corrected more quickly
DOS Version 3 users who find it desirable to conve~t to OS MFT or MVT
with installation of a Model 145 will find the transition eased by use
of DOS emulation under OS, a feature not available on System/360 models.
For larger DOS users, the following are some of the attractive features
offered by OS MFT and MVT that are not provided by DOS Version 3 or 4:
• Expanded mUltiprogramming--up to 15 processing programs (partitions
or regions) operating concu:r:rent.lywith unit record data
transcription (multiple reader interpreters and output writers)
• Priority and job class job :scheduling for more efficient use of
available system resources
• Dynamic resource allocation by the operating system of I/O devices
and direct access space at l~rogram initiation time, and of processor
storage and programs during program execution
• Expanded data management fa~cilities, including device independence,
a data set catalog, shared direct access device support, and graphic
device support
• Program relocation at program load time by the control program
• Extensive job accounting daita and resource usage statistics gathered
by the control program (significantly more than are provided in 005)
• Expanded teleprocessing support (TCAM) and time-sharing support (TSO
and CALL-OS)
A Guide to the IBM System/310 Model 145
209