IBM System/370 Guide

I-'
o
o
Features
II. STORAGE
A. Processor stora~Je
sizes
B. Processor st'Dra~Je
cycle
C. Processor storacje
validity checkiJlg
D. Processor storage
reconfiguration
E. Byte boundary
alignment permi-tted
for operands of
nonprivileged
instructions
F. storage and fetch
protection
System/360
Model 65
256K
512K
76SK
1024K
750 nanoseconds (for
S bytes). TWo-way
interleaving of
sequential accesses
other than by the
channels is provided.
Parity checking by
byte. NO hardware
error correction is
provided.
Not provided for
uniprocessor systems
No
Standard
512K
1024K
1536K
204SK
3072K
System/370
Model 165
2 microseconds.
Storage is 4-way,
doubleword
interleaved for CPU
and channel requests.
32 bytes can be
obtained every 2
microseconds.
ECC checking on a
doubleword. Single-
bit errors are
corrected by hardware.
Malfunctioning
storage boxes can be
configured out of the
operational system.
Standard
Standard
G. 2361 Core Storage
Optional Cannot be attached
Up to S million bytes
can be attached.
H. High-speed buffer Not provided
storage
1. Cycle time
2. CPU-to- buffer fetch
time
SK is standard.
SK more can be added
SO nanoseconds
160 nanoseconds for
S bytes; a request
can be initiated
every SO ns cycle.
OS - Model 65
All are supported.
Storage protection is
supported.
Hierarchy support is
pr:ovided.
OS - Model 165
All are supported.
Programmers can byte-align
in Assembler, PL/I, ANS
COBOL, and FORTRAN
programs.
Same as Model 65

IBM System/370 Specifications

General

Brand	IBM
Model	System/370
Category	Server
Language	English