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3. CPU AND
MEMORY
3-1.
Block
diagram
1)
Relation between
MMR
(Main Memory Mapper)
and
main
memory.
, RAM
I
(II'TION
1
4-
RAN
'
64KBV2)
VI
°l
RECEI
VFR
1
1
OPTION
.
Ml
DM1
I
MO*J
OK
II K U MO* 400
kl Mil I 1 ION
I
JK» 2K*
J
(,
{)
R
si v i
(.us
TOM
1
SI CSI -2
It
L
||
'7220
i
,APM,C
MPXR
VIIIK1
RAM
32KB
V
1 HI O RAM
32KB
VIDH)
RAM
32KH
RS-232C
l/f
SEMI
CUSTOM
IS!
CSI'-I
I