HP 9030 CE - Page 77

9-12 9030/40 Diagrams
MEMORY ADDRESS BUS
AND CONTROL
(9 ADDRESS AND 3 CONTROL-
NRAS.NCAS.NWR) 12
MPB
32
MC
MEMORY DATA BUS
RAM CHIPS ARE 256K X 1 BIT
1 Megabyte Memory Organization
t
MPB
A
LOGICAL MEMORY ADDRESS ------i~~1
(27 BITS)
X-DON'T CARE
9
9
1
1
\
y
X AND Y PHYSICAL
ADDRESS
MAPPER CAM DATA FORMAT
1 Megabyte Memory Mapping Operation
I
,