System Highlights - IBM System/370 145 Manual

SECTION 01: SYSTEM HIGHLIGHT~
The system/310 Model 145 is olesigned to enhance, extend, and broaden
the successful concepts of SystE!ll1/360 and to provide significant new
functions that do not necessitat.e a major reprogramming effort. It is a
general purpose growth system for System/360 Model 40 and large Model 30
users that offers significant p.rice performance improvement in addition
to many new features. The Syste!m/310 Model 145 retains and extends the
wide range of commercial and sci.entific data processing capabilities
offered by System/360 Models 30 and 40. It also offers functions
designed to facilitate new appli.cation development and to ease entry
into, and expansion of, online clata processing operations. The Model
145 is compatible with other Sys:tem/310 models.
Transition from system/360 models to the System/310 Model 145 can be
accomplished with a minimum of e!ffort because most current System/360
user programs, I/O devices, and programming systems are upward
compatible with the new system. Additional capabilities are included in
os MFT and MVT and in DOS Versions 3 and 4 to support certain new
features of the Model 145, there~by providing proven operating system
performance as well as continuit.y.
Compatible growth from
System~360
operating systems to a Model 145
virtual storage environment can be aChieved using the new System/310
operating systems: Dos/virtual Storage (DOS/VS), OS/Virtual Storage 1
(OS/VS1), and OS/Virtual Storage 2 (OS/VS2), which are based on DOS
Version 4, OS MFT, and OS MVT, respectively. These new operating
systems will run only on system/310 models with extended System/310
functions, namely on those with extended control mode of system
operation and dynamic address translation facilities. In addition to
supporting virtual storage, the System/310 operating systems offer
several other new capabilities and performance-oriented enhancements
that are not provided by DOS Version 4 or OS MFT and MVT. A virtual
machine environment is supported by Virtual Machine Facility/310
(VM/310), the successor to CP/61 for System/310. While CP/61 is
available only to Model 61 System/360 users, VM/370 operates on
System/370 Models 135, 145, 155 II, 158, 165 II, and 168.
Transition with little or no reprogramming is also provided for
1401/1440/1460 and 1410/1010 use.rs and for those presently emulating
these systems on System/360. Improved emulators for these systems that
operate under OS (MFT, MVT, VS1, and VS2) or DOS (Versions 3, 4, and VS)
control on the Model 145 are available.
DOS users who wish to install OS on their Model 145 can ease the
transition by using the standard OS/DOS Compatibility feature.
An
OS
DOS Emulator program is provided that supports emulation of a DOS
Version 3 or 4 multiprogramming :system under OS (MFT, MVT, VS1, or VS2)
control.
Highlights o:f the Model 1 •• 5 are .as follows:
• Upward compatibility with mo:st System/360 architecture and
programming has been maintained through implementation of the basic
control (BC) mode of system operation.
An
extended control (EC)
mode of operation, not implemented in system/360, is also provided •
• Internal performance of a Mod.el 145 operating in Be mode is from
approximately three to five itimes that of the Model 40 for a typical
instruction mix.
A Guide to the IBM system/370 .Model 145 1