IBM System/370 145 Manual page 170

control statements required to assemble and link-edit t.he desired
emulator modules and place the emulator program in SYS1.LINKLIB.
Emulator program routines and data formatting programs (Tape
Preprocessor, Tape Postprocessor, and Format Disk) are distributed
on a restore tape independently from regular OS releases. All Model 145
1400/1010-series emulator users receive the same two tape formatting
programs. One disk formatting program is supplied.. It handles
preformatting for 1401/1440/1460 files and 1410/1010 files. The
following must be done to include one of the emulators in an OS
operating system for the Model 145:
• Certain facts about the emulator program to
be
used with the
operating system generated must be specified in the input required
to generate the
os
control program.
• The emulator restore tape must be obtained from PID, and an emulator
program with the desired facilities must be generated and placed in
SYS1.LINKLIB. More than one version of a 1400/70tO-series emulator
program for the same and different systems can exist in an operating
system.
The emulator program generated will emulate, without change,
1400/1010 programs that are written in accordance with IBM 1400/1010
Principles of Operation manuals and that are operating on 1400/7010
systems, subject to the following conditions:
1. Time-dependent p~ograms may not execute properly. Provision has
been made to allow some time-dependent programs to be emulated
correctly. (See the appropriate emulator planning manual for
details.)
2. Programs that depend on error conditions or on the absence of a
particular feature may not be emulated correctly.
3. Programs with undetected programming errors will give
unpredictable results.
4. Only the 64-character BCD set is accepted by the emulators.
5. Programs that use unsupported features or I/O devices (as
described for each emulator in this subsection and in the
emulator program reference manuals) must be modified to conform
to the support provided by the specific emulator program, unless
a user routine is written to handle t.he {eature .•
The Model 145 1400/7010 integrated emulator programs support the same
facilities as the stand-alone 1401/1440/1460 and 1410/7010 emulators for
System/360 models except for a few special features not supported by the
Model 145 emulators. Thus, any 1400/7010 program that is being executed
by a stand-alone System/360 emulator and that does not use one of these
special features can be emulated on the Model 145 without change.
Tape and Disk Formatting Programs and Data Formats
The Tape Preprocessor and Tape Postprocessor formatting programs
supplied to Model 145 1400/7010-series emula.tor users operate as
processing programs and can be executed with any OS control program
generated with the emulator macro specified. The Tape Preprocessor
operates in a program area of 4K bytes plus I/O buffer requirements and
accepts as input seven- and nine-track tape in 1400/7010-series format
with or without 1400/7010 labels. It accepts mixed density 1400/7010
files, that is, files with header labelu written in a density different
from that of the data. The emulator programs consider a change in
density to
be
an error. Therefore, mixed density 1400/7010-format files
must be preprocessed.
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A Guide to the IBM System/370 Model 145