IBM System/370 145 Manual page 237

Hardware Feature
II. STORAGE
A. Processor (main)
storage sizes
B. Processor storage
cycle
C. Processor storage
validity checking
D. Control storage
E. Byte-oriented operands
F. Storage and fetch
protection
III. CHANNELS
A. Byte multiplexer
channel - up to 8
control units
1. Subchannels
System/360
Model 30
16K
24K
32K
64K
1.5 microseconds
for 1 byte
Parity checking
on each byte -
errors are not
corrected by
hardware. -
Card ROS
system/360
Model 40
32K
64K
128K
192K
256K
2.5 microseconds
for 2 bytes
Same as Model 40
Tape ROS
System/370
Model 145
DOS Version 4
Model 145
All are supported
160K
208K
256K
384K
512K
540 nanoseconds
fetch for 4 data
bytes
607.5 nanoseconds
store for 4 data
bytes
540 nanoseconds
fetch for 8
instruction bytes
ECC checking on
a doubleword.
Single-bit
errors
are
corrected by
hardware.
Corrected intermittent
single-bit and
uncorrected storage
errors are logged
by
RMSR.
Reloadable
monolithic storage
(32K-64K) with ECC
No No Standard
Programmers can use
the byte alignment
hardware facility in
Assembler programs.
Storage protect Same as Model 30 Standard
is
optional.
Storage protect is
supported.
Fetch protect
is
not available.
Standard
96 for
sizes
16K to 64K.
A special fea-
ture permits
systems with 32K
or 64K to have
224 subchannels.
Standard
32K-32
64K-64
128K-128
192K-128
256K-128
Standard
supported
Number of sub- Supported
channels per
system is not
related to stor-
age size. A tot-
al of 16,32,64,
128, or 256 sub-
channels is per-
mitted with any
storage size.
os
MFT
and
MV'l
Model 145
All are supported
(MVT requires 256K
or more)
MeB logs errors as
does DOS
Same
as
DOS
Storage protect
is
supported
SUpported
SUpported