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DIDS-402-2AMl3
The various characters used for conveying information ln the system may
be divided into two general groups: displayable and nondisplayable.
The display-
able characters are shown in figure 4-3, which represents the display terminal
ASCn matrix.
The character organization shown in figure 4-3 is identical to the
character font of the monos cope target.
The nondisplayable characters consist
of numerous control codes used to accomplish a control action of some sort at
either the Display Terminal or the CPU.
These characters are listed according
to their binary values in table 4-1.
MSB
LSB
+
_
....
_-
I I I
----
a
I I
101
001
110
010
100
----
000
-- - - ----
--
--
--
- - - - - -
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Figure 4-3.
ASCII Matrix
4-9 CHARACTER FORMAT
The character format for IO-bit asynchronous transmission is shown in
figure 4-4, where bl through b7 are referenced to the characters illustrated in
figure 4-3 and table 4-1.
Aside from the information bits formed by bi through
b7 , other factors concerning each data character that must be considered are:
4-8
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