IBM System/370 145 Manual page 179

40:10 DOS 1401/1440/1460 ~ 1410/7010 EMULATOR PROGRAMS
FEATURES COMMON TO BOTH EMULATORS
The Model 145 continues the ad"antages of integrated emulation for
DOS CS/30 and CS/40 users. In addition, these advantages are now
extended to users of 1410/7010 sUind-alone emulation.
A 1401/1440/1460 and a 1410/70"10 Emulator program are provided. Both
emulator programs are common in dE:!sign and run as problem programs under
DOS Versions 3 and 4, and DOS/VS on a Model 145 equipped with either the
1401/1440/1460 Compatibility or tIle 1401/40/60, 1410/7010 Compatibility
feature. The latter feature perwLts operation of both the
1401/1440/1460 emulator and the 1.,10/7010 emulator. These two no-charge
compatibility features are also uned by the Model 145 OS 1401/1440/1460
and 1410/1010 emulators.
As discussed at the begi.nning of Section 40:05 (OS 1400/1010 emulator
discussion)., a DOS 1400/1010 emulcltor program generated for the Model
145 will run on a Model 135 (1401J'1440/1460 only) but not on a Model
155, while a DOS 1400/7010 emulator program generated for a Model 155
"'ill also run on Models 135
(1401J'1440/1460
only) and 145.
The emulators can be used in a batch-only system environment or can
operate in the baCkground and batched foreground partitions of a
multiprogramming system.
TherefoJ~e,
more than one 1401/1440/1460 or
1410/1010 Emulator program can eXE!Cute concurrently with each other and
with system/370 programs. Additionally, emulated jobs and DOS jobs can
be intermixed in a single job stream.
The Model 145 DOS integrated emtuators consist of a compatibility
feature, simulation routines., and DOS data management routines. They
offer Model 145 users the followlllg advantages:
• System resources are more fully utilized.
• Emulators can run concurrently in all three pa,rti tions of a
multiprogramming system. Thel!r are relocatable and can be link-
edited to run in any partition.
• 1401/1440/1460 and 1410/1010 I:mulator programs and DOS programs can
be executed concurrently and intermixed in a single job stream.
• OOS supervisor and data managE~ment services are avai lable to the
user. This provides job contJ~ol facilitie~, standard disk and tape
label processing, and common clata formats for emulator files and DOS
files.
• 1400/1010 unit record input/output operations can be made device
independent and can be emulatE~d on Model 145 uni t record devices,
magnetic tape units, or direct~ access storage devices.
Emulator Program Generation
~
llii:ecution
The Model. 145 DOS emulators arE! distributed with DOS releases. An
emulator is assembled by the use of macro instructions. The macro
instructions describe the 1400/7010 CPU, input/output devices, special
features, data files, emulator buffers., and the desired user options.
When assembled, the macros providE! an object 'module and linkage to
preassembled modules stored in thE! system relocatable library. The
preassembled modules are combined with the emulator object module by the
linkage editor for cataloging in
t~he
core image library,. Any number of
emulators can be assembled and cat~aloged in a core image library to run
in any partition. '
A Guide to the IBM System/370 ModE!l 145
169