IBM 4381 Manual page 140

Hardware Features
C. Processor storage
1. Sizes
2. Path to high-speed buffer
3. Validity checking
4. Technology
III. CHANNELS
A. Number available
B. Byte multiplexer
I. Number available
2. Data rates
3. UCWs/subchannels
C. Block multiplexer
I. Number and data rates in
Mb/sec
4341 Model Group 12
2Mb
4Mb
8Mb
12Mb
16Mb
16 bytes (two doublewords)
ECC on a doubleword
All single-bit errors corrected
64K-bit chip, dynamic
Six standard
One standard (channel 0)
Channel 4 or 5 can be configured as
a second
24 Kb/sec for one-byte transfers
Up to 256 for a channel
Five standard
Channel 1 - 3
Channel 2- 3
Channel 3 - 2
Channel 4 - 3
Channel 5 - 2
Max Aggregate - 13
4381 Model Groups 11, 12, 13, and 14
4Mb (Model Group 11 only)
8Mb (not Model Group 14)
16Mb
24Mb (not Model Group 11)
32Mb (not Model Group 11)
16 bytes (two doublewords)
ECC on a doubleword
All single-bit and some double-bit
errors corrected
64K-bit chip, dynamic for up to 16Mb
256K-bit chip dynamic for storage
above 16Mb
Six standard, six optional for
Model Groups 11, 12, and 13
Twelve standard, six optional for the
Model Group 14
One standard (channel 0) for Model
Groups 11, 12, and 13
Two standard (channel 0 in each group)
for Model Group 14
Channel 5 can be configured as a
second in Model Groups 11, 12, and 13
Channel 5 in each group can be
configured as a second for the group in
a Model Group 14
24Kb/sec (28Kb for the Model Group
14) for one-byte transfers
2Mb/sec for burst mode (all models)
Up to 256 for a channel
Five standard and six optional for
Model Groups 11, 12, and 13
Ten standard and six optional for the
Model Group 14
Model Groups 11, 12, and 13
Channel 1 - 3
Channel 2- 3
Channel 3 - 3
Channel 4 - 3
Channel S - 2
Max Aggregate S channels - 14
Model Groups 11, 12, and 13
Channel 6 - 2 3 3
Channel 7 - 2 3 3
Channel 8 - l l 3
Channel 9 - l l 3
Channel A - 1 l 3
Channel B - 1 l 1
Max Aggregate 11 channels - 22, 24, and 30
Comparison Table of Hardware
131