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30:30 Standard and Optional Features
Standard Features
The following are standard features of 4381 Model Group 14 and 3 Processors that
are operative for both System/370 and System/370-XA modes:
•
Binary arithmetic
•
BRANCH and SA VE instructions
•
Byte-oriented operands
•
Channel indirect data addressing
•
Channels 0 to 5 for each instruction processing function, which can be
configured as one byte and five block multiplexer channels or two byte and
four block multiplexer channels
•
Command retry for block multiplexer channels
•
Conditional Swapping
•
Control Unit Powering (for up to 32 control units)
•
CPU timer and clock comparator (one microsecond resolution)
•
Data Streaming for all installed block multiplexer channels
Decimal arithmetic
•
Dual Address Space Facility
•
ECC on processor storage and error correction for certain double-bit errors
ECPS:MVS (tracing functions not implemented for System/370-XA mode)
EC mode of operation
Elementary Math Library Facility (Model Group 3)
•
Expanded machine check interruption class
•
Extended Addressing
Floating-point arithmetic (including extended precision)
•
High-speed buffer storage-64K bytes for each instruction processing function
in the Model Group 14 and 32K bytes for each instruction processing function
in the Model Group 3
•
Instruction retry
Interruption for SSM instruction
•
Low address protection
Mathematical Function Facility (Model Group 14)
•
Monitoring feature
•
MOVE INVERSE instruction
Multiply and Add Facility
Multiprocessing
Problem Analysis
Program event recording
PSW key handling
Reconfiguration functions
•
Reference and change recording
Reloadable control storage
•
Square Root Facility (Model Group 14)
Storage key instruction extensions (ISKE, RRBE, and SSKE instructions)
•
Store and fetch protection (one key per 2K-byte block for up to 16Mb
installed or one key per 4K-byte block for more than 16Mb installed)
Store status
•
Support processor subsystem
Section 30: 4381 Processor Multiprocessor Model Groups
81
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