Figure 7 ABOX_CTL Register: 400/500/600/700/800/900 Models
07 06 05 04 03 02 01 0011 10 09 08
011110
WB_DIS
MCHK_EN
CRD_EN
IC_SBUF_EN
DC_EN
DC_FHIT
MR−0061−93RAGS
The ABOX_CTL fields have the following meanings when programmed as above.
Position Field Function
0 WB_DIS Clear. CPU write buffer enabled to write.
1 MCHK_EN Set. Machine checks are enabled.
2 CRD_EN Set. Correctable ECC errors cause interrupts.
3 IC_SBUF_EN Clear in 300 models. Icache stream buffer is disabled. Set
in 400/500/600/700/800/900 models. Icache stream buffer is
enabled.
10 DC_EN Set. Dcache is enabled.
11 DC_FHIT Set. Dcache is enabled but not set to force hits
2–10 Memory and I/O Addressing
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