Omron 8025G Maintenance Manual page 68

THEORY OF OPERATION
SECTION 4
4.3.2 Lower Case Characters
Characters Without Descenders. As shown in Figure 4-4, lower case charac-
ters without descenders (e.g., "h") are formed in the same way as the first group of
upper case
character~
(8, D, E, etc.) discussed in Section 4.3.1.
COLUMN
LI NE
o
2 3 5 6 7
8
9
LI HE
ADDRESS
o
000_000000
000
000_000000
001
2
oooeoeeeoo
010
3
oooeeoooeo
OIl
4
oooeoooooe
100
5
oooeoooooe
101
6
oooeoooooe
110
7
0000000000
III
8
0000000000
000
9
0000000000
e ·
illuminated dot
CHARACTER INFORMATION
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No (Increment to 000)
Yes, same as L-O but
blanked
Figure 4-4. Example of lower case character (h).
Characters With Descenders (g, j, p, q, and y). Using "p" as an example,
Figure 4-5 shows how lower-case characters with descenders are. formed. Again, the
same basic operations as for the other lower-case characters apply. For this group,
however, a control dot in C-2, L-O, in addition to producing the half-dot shift, in-
dicates.that dot formation in L-O will be used in the ninth line (L-S) of the dis-
play. That is, when L-7
(111)
is incremented to L-S (000), the dot information in
L-O will not be blanked out as it would for lower-case characters without descenders.
Note that, since the control dot in C-2, L-O produces the half-dot shift, all other
scan lines in the character must Also be shifted if the character has a vertical
straight line.
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