ASCIC$)
AND 63
again provides the numerical equivalent of
C$.
631O=3F16. This AND operation zero
es
the
two
high-
order bits of the
ASCII
code (which were developed
in
the previous expresson), leaving the five low-order bits
ready
to
be
ORed
in. After this operation. this term
has
a
value of:
00XXXXXX2
where x=O or
1.
Now the
OR
operation
is
performed. producing the screen memory code
equivalent
to
the
ASCII
code of the character
C$.
After the
OR
operation .the com-
bined term
has
a value of:
01
xxxxxx2 or 00xxxxxx2
This
is
the value
POKEd
into the last screen position at line 150. Since
no
further
messages
are
to
be
printed. line 160 branches past the
HIT
A
KEY
message.
383
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