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4. PRE-sTART u p PROCEDURES
/MELSEC
(2)
Memory protect range
Protected RAM address ranges are shown below. The DIP switch
is on when the lever ooints t o the right, this is marked on the
switch cover.
0
@
-
0
Unured
DIP Switch Details
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Memory Protect Range
Switch
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Memow channel
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Number
For RAM
ROM
Memory address
only
loaded
8000H
to 9FFFH
SW3
AOOOH
to
BFFFH
SW5
2
4
8000H
to
9FFFH
SW6
2
4
AOOOH to BFFFH
SW7
2
4
COOOH to DFFFH
SW8
-
SW9
-
SWlO
-
Unused
S W l l
-
SW12
-
SW13
(1) BASIC program address data and multi task setting data
is
stored in address ranges 4FOOH t o 4FFFH
(256
bytes).
Set memory protect with SW1 after starting multi task-
ing.
(2)
Switching the memory protect key t o ON protects all
areas defined by the DIP switch settings.
(3)
Keep the memory protect switch OFF during BASIC
program writing and editing.
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(4) The RAM areas marked
@
and
@
on the preceeding
page and the user work area cannot be memorv ~rotected.
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