Zilog Z80180 Bedienungsanleitung Seite 76

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Z8018x
Family MPU User Manual
UM005003-0703
61
MMU Common Base Register (CBR)
CBR specifies the base address (on 4K boundaries) used to generate a 20-
bit physical address for Common Area 1 accesses. All bits of CBR are
reset to 0 during RESET.
MMU Common Base Register (CBR: 38H)
Bit 765432 1 0
Bit/Field CB7 CB6 CB5 CB4 CB3 CB2 CB1 CB0
R/W R/W R/W R/W R/W R/W R/W R/W R/W
Reset 0 0 0 0 0 0 0 0
Note: R = Read W = Write X = Indeterminate ? = Not Applicable
Bit
Position Bit/Field R/W Value Description
7
0CB70 R/W CBR specifies the base address (on 4KB boundaries) used
to generate a 20-bit physical address for Common Area 1
accesses.
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