Memory Map For Normal State - Sharp MZ-80B Owner's Manual

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4.2.2 Memory map for normal state
When the machine shifts from the IPL state to the normal state, the memory becomes as shown in
the map in FIGURE 4.3.
A d d r e s s . - - - - - - - - - - - - - - ,
$0000
RAM (I)
32k bytes
$7FFF~--------------------~
$8000
RAM (II)
32k bytes
(expansion area)
$FFFF~--------------------~
FIGURE 4.3 Memory map for the normal state
In the case of the 32k bytes standard RAM , addresses range from $0000 to $7FFF; in the case of
the 64k bytes full RAM, the address space consists of the full area from $0000 to $FFFF.
When addresses are changed from the IPL state to the normal state or vice versa, the operation is
controlled by output terminal signals
cl' c3
of port
c
of the 8255 as described later.