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2.2.2
Caching Parameters
The IDD supports the MODE SELECT parameters (caching parameters: page code = 8) shown
in Fig. 2.5 for controlling the cache feature. See item 3.1.5 concerning details of the MODE
SELECT parameters.
Bit
7
Byte
0
0
1
2
IC
Default
1
Variable
0
3
4-5
Default
Variable
6-7
Default
Variable
8-9
Default
Variable
10-11
Default
Variable
12
FSW
Default
1
Variable
0
13
Default
Variable
14-15
16
17-19
Remark:
The variable column indicates whether the parameter can be changed or not (if "1", the
parameter can be changed).
6
5
4
0
0
0
X'0A' or X'12' (
(ABPF)
(CAP)
DISC
0
0
1
0
0
0
X'00' (Reserved)
Prefetch-suppressed block count
X'FFFF'
X'0000'
Minimum prefetch
X'0000'
X'FFFF'
Maximum prefetch
X'00xx'
X'0000'
Maximum prefetch
X'FFFF'
X'0000'
0
0
0
0
0
0
Cache segment count
X'04'
X'1F'
X'0000' (cache segment size)
X'00' (Reserved)
X'000000' (Reserved)
Figure 2.5
Cache Control Parameters
C141-E039-01EN
[Caching Parameters (Page Code = 8)]
3
2
1
0
Page Length
)
SIZE
WCE
0
0
0
1
limit block count
(Reserved)
0
0
0
0
1
0
0
0
MS
RCD
0
0
0
1
(1 cache
segment
0
0
0
0
2 - 9
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