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SECTION VIII.
OPERATOR'S CONSOLE
The automatic carriage return after reaching the 64th graphic position in each line does
not interrupt the logging operation.
Pressing the Carriage Return key, however, terminates
the logging operation and returns the console to the control mode or the peripheral mode.
CONSOLE TYPEWRITER OPERATION
Output message typing and parameter entry, which are described in the following para-
graphs, apply to both types of console.
The keyboard layout for both consoles is shown in
Figure 8-2.
The alphabetic and some symbol keys are separated from the numeric and arith-
metic symbol keys.
The digit keys and special function alphabetic keys are distinctly colored.
El
NOTES:
1.
In the Type 220-3 Console, the space, 0 through 7, A, B, L,
P, Rand S keys have special significance.
2.
The TYPE and LOG indicators appear only on the Type 220-1
Console.
Figure 8-2.
Console Keyboard Layout
Console Output Message Typing
When an output message is to be written by the console typewriter, the program issues a
standard Peripheral Data Transfer (PDT) write instruction.
Execution of the PDT instruction
causes one record to be typed out starting with the location specified in the A address of the
instruction.
The appropriate graphics (see Table 8-1) are typed out contiguously ten to the
inch.
Word marks and item marks by themselves have no effect upon the typing; a record mark
terminates the typeout.
In the Type 220-3 Console, a record mark likewise terminates typing
and, in addition, causes an interrupt signal to be sent to the central processor, provided that
console interrupts have been allowed by the program.
Automatic carriage return with line spacing is provided by right-hand margin control after
....."t
the 64th character position in the line has been reached.
Programmed control of the carriage
8-6
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