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The following OUT command selects which block is displayed on or off as Port A
and Port
B
of 81C55.
-
OUT
09
OUT
BA
B 1 corresponds to I'AO.
and
B2 corresponds t o PAI. etc.
B10 corresponds to
PB
1.
A1 in each I/O port selects the corresponding LCD block, and is
deselected
by a 0.
*
Address Set
OUT FO
Bit
7
Bit
6
0
0
PAGE
0
0
1
PAGE
1
1
0
PAGE 2
1
1
PAGE 3
BIT 5 TO BIT
0
0 t o 49 displayed by binary number
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