8K Buffer Organization - IBM System/370 Manual

Page of GC20-1 730-0
Revised 7/14/70
By TNL GN20-2227
A register contains processor
storage address bits 8 - 20
of the data in the
corresponding buffer block.
Four blocks per column;
bits 21 - 26 of the processor
storage address determine
the column.
512 blocks
per column.
.Figure
10.15.4.
22
Address Array
J
J
o
13-bit
)
address
13-bit
address
13-bit
address
2
13-bit
)
address
3
\
Column 0 63
Block
Buffer Storage - 8K
J
o
32 bytes
)
J
32 bytes
~
)
32 bytes
2
,
3
32 bytes
J
I
Column 0
\
63
Processor Storage - 1024K
Block
I
,
0
)
1
)
i
............
-
.\
-
"'
---
-----
---
-
to--
- -
7
~
,
51 0
J
I
511
1 . -
1
--...&....----'--""""""41
\\-----'-----1
Column 0
}
\
63
8K buffer organization
~
256 Block
Address
Registers
256 Blocks
Addresses 0 - 2047
Addresses 2048 - 4096