Parameter Data Format
5.1.6 Caching Parameters (Page Code = 8)The page descriptor format of this MODE SELECT parameter is shown in Table
5.8.
Table 5.8 MODE SELECT parameters: caching parameters
Bit
Byte 7 6 5 4 3 2 1 0
0 0 0 0 0 1 0 0 0
1 X'12' (Page Length)
2 IC ABPF CAP DISC SIZE WCE MF RCD
Default 0 0 0 1 0 1 0 0
Variable 1 0 0 0 0 1 0 1
3 Demand Read Retention Priority Write Retention Priority
Default 0 0 0 0 0 0 0 0
Variable 0 0 0 0 0 0 0 0
4-5 Disable pre-fetch transfer length
Default X'FFFF'
Variable X'0000'
6-7 Minimum pre-fetch
Default X'0000'
Variable X'0000'
8-9 Maximum pre-fetch
Default X'xxxx'
Variable X'0000'
10-11 Maximum pre-fetch ceiling
Default X'FFFF'
Variable X'0000'
12 FSW LBCSS DRA VS VS (Reserved)
Default 1 0 0 0 0 0 0 0
Variable 0 0 0 0 0 0 0 0
13 Number of cache segments
Default X'08'
Variable X'3F'
14-15 Cache Segment Size
Default X'0000'
Variable X'0000'
16 X'00' (Reserved)
17-19 Non cache segment size
Default X'0000'
Variable X'0000'