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System Control Keys
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.. HBRRIIBIiIIBBIiEi.
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II II II II 111111 II 11111_
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_alllllloaall . . . . .
_ _ _ _ _ 11.
The keys on the right-hand side of the keyboard control various system functions related
to the display, printer and editing operations. Most of these keys execute their functions
immediately, as the key is pressed.
I
ANY C
1
I
PRT ALL
1
I
STEP
1
allows you to step through a program, one line at a time. Using
the
I
STEP
1
key to debug programs is covered in BASIC Programming
Techniques.
I
ANY C
1 ([]8ill}1
STEP I) is used to find any ASCII character.
First
press
I
ANY C
I.
Then enter a three-digit number from 000 through
255 representing the decimal equivalent of an ASCII character. The
computer automatically displays the character on the screen. For a list
of characters and their equivalent decimal values, see the US ASCII
Character Codes table in the "Useful Tables" appendix of the BASIC
Language Reference.
Press
I
ANY C
I,
then type 65 which is the decimal equivalent of "A". The
"A" is now displayed in the keyboard line. Press
I
CLR Lito erase it.
I
RST
1
(I SHIFT
H
PSE I) stops or resets program execution immediately
without erasing the program from memory. The
BASIC Reset
message
indicates the computer is ready for your command.
I
PRT ALL
1
(I SHIFT
H
ENTER I) key turns the printaU mode on and off,
allowing keyboard operations and displayed error messages to be copied
to a printall device. Press
I
PRT ALL
1
once to set printall "on" and again
to set print all "off". The printall mode is displayed in the lower-left
corner of the screen.
9-8
HP 98203A Keyboards
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