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System/370
Reference
Summary




GX20-1850-3

Fourth Edition (November 1976)
This reference summary is a minor revision and does not obsolete
the previous edition. Changes include the addition of some new
DASD and 3203 printer commands, the EBCPIC control
characters GE and R LF, and minor editorial revisions.

The card is intended primarily for use by S/370 assembler lan-
guage application programmers. It contains basic machine in-
formation on Models 115 through 168 summarized from the
System/370 Principles of Operation (GA22-7000-4), frequently
used information from the VS and VM assembler language
manual (GC33-4010), command codes for various I/O devices,
and a multi-code translation table. The card will be updated from
time to time. However, the above manuals and others cited on the
card are the authoritative reference sources and will be first to
reflect changes.

To distinguish them from instructions carried over from S/360, the
names of instructions essentially new with S/370 are shown in italics.
Some machine instructions are optional or not available for some
models. For those that are available on a particular model, the user
is referred to the appropriate systems reference manual. For a
particular installation, one must ascertain which optional hardware
features and programming system(s) have been installed. The
floating-point and extended floating-point instructions, as well as
the instructions listed below, are not standard on every model.
Monitoring (the MC instruction) is not available on the Model 165,
except by field installation on purchased models.

Conditional swapping CDS, CS
CPU timer and clock comparator SCKC, SPT, STCKC, STPT
Direct control RDD,WRD
Dynamic address translation LRA, PTLB, RRB, STNSM,
STOSM
Input/output CLRIO,SIOF
Multiprocessing SIGP, SPX, STAP, STPX
PSW key handling IPK,SPKA

Comments about this publication may be sent to the address
below. All comments and suggestions become the property of IBM.



IBM Corporation, Technical Publications/Systems, Dept. 824,
1133 Westchester Avenue, White Ptains, "N.Y. 10604.
MACHINE INSTRUCTIONS
NAME MNEMONIC
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