Table of Contents
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21
COLUMN
I
ROW
I
CHARACTER
NUMBER
NUMBER
COLUMN
I
ROW
I
NUMBER
NUMBER
CHARACTER
0
0
(SPACE)
16
0
P
1
1
A
17
1
Q
2
2
B
18
2
R
3
3
C
19
3
5
4
4
0
20
4
T
5
5
E
2
1
5
U
6
6
F
22
6
V
7
7
G
23
7
W
8
8
H
24
8
X
9
9
I
25
9
Y
10
10
J
26
10
Z
11
11
K
27
11
;
12
12
L
2S
12
<
13
13
M
29
13
=
14
14
N
30
14
>
15
15
0
31
15
1
Displaying Inverse-Video Characters
Inverse-video
characters can
be
easily created
using
1
BlDSPEC
I.
You
can
build
a special
inverse
character
by
executing
ISLDSPEC I
with
a
ch
aracter code in
the X·register. recalling
th
e
character into the ALPHA
register. then displaying
it using
I
OUTA I.·
The following example shows
how to
build and
display the
word
"LOG"
with
inverse-video
characters.
Keystroke.
I
ALPHA
1
.
1
CLAI
I
ALPHA
I
1
I
BLDSPEC I
76 1sLD
SPEC
I
I
ALPHA
I
I
I
ARCL
I[:Jxl
ALPHA
I
I
Cu
l
1
I
BLDSPEC
I
79
1sLDSPEC
I
I
ALPHA
I
I
I
ARCLI[:J X
I
ALPHA
I
ICu
l
1
I
SLDSPEC
I
71
I
SLDSPEC
I
I
ALPHA
I
I
I
ARCLI
[:J
X
I
ALPHAI
IOUTA
I
Clears the
ALPHA
register.
Sets the
most
significant
bit
to
1.
Specifies
the
character code for "L".
The
special
inverse "L"
character is
now
in
the X-register.
Appends
the inverse
"
L" to the ALPHA register.
Clears
X'register
before
creating a new character.
Sets
the most
significant
bit for
the
next
character to 1.
Specifies
the character code
for
f·O".
The
special
inverse
"aU
character is
now in
the X·register.
Appends
the
"0"
to the first inverse character
th
e
ALPHA
register.
Clears the
X·register.
Sets
the most
significant
bit for
the
next
character to 1.
Specifies the character code
for
uG".
The
special inverse
"a"
character
is now
in
the
X-register.
Appends the
"G"
to the first
two characters
in the ALPHA
register.
Sends
the
word
to
the
video
interface.
After
executing
I
OUTA
I.
th
e
word will
appear
as
_
on
the
video
display
.
..
Inverae character. can be sent
to the
interface
with
I
DurA
!only-
I
ACA
land
I
PRA
Imlplay character.
normally.
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