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programming operations. Any Programming Console operation can be can-
celled by pressing the CLR key, although the CLR key may have to be
pressed two or three times to cancel the operation and clear the display.
The yellow keys are used for writing and correcting programs. Detailed ex-
planations of their functions are given later in this section.
Except for the SHIFT key on the upper right, the gray keys are used to input
instructions and designate data area prefixes when inputting or changing a
program. The SHIFT key is similar to the shift key of a typewriter, and is used
to alter the function of the next key pressed. (It is not necessary to hold the
SHIFT key down; just press it once and then press the key to be used with
it.)
The gray keys other than the SHIFT key have either the mnemonic name of
the instruction or the abbreviation of the data area written on them. The func-
tions of these keys are described below.
Yellow Operation Keys
Gray Instruction and Data
Area Keys
The Programming Console Section 7–3
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