The $RESET$ operation („&ÔL %RESET% ) resets the PPAR parameters (except ptype) to their default values,

and erases PICT. (Note: the & means to press and hold the „key while pressing Ô).

Note that res behaves differently for the statistical plot types BAR, HISTOGRAM, and SCATTER than for other plot types. For BAR, res specifies bar width; for HISTOGRAM, res specifies bin width; res does not affect

SCATTER.

PRTPAR

PRTPAR is a variable in the HOME directory that contains a list of printing parameters. It is created automatically the first time you use a printing command.

 

 

Default

Parameter (Command)

Description

Value

 

 

 

delay time (DELAY)

A real number, in the range 0 to 6.9, specifying the

0

 

number of seconds the calculator waits between

 

 

sending lines. This should be at least as long as the

 

 

time required to print the longest line. If the delay is

 

 

too short for the printer, you will lose data. The delay

 

 

setting also affects serial printing if transmit-pacing

 

 

(in IOPAR) is not being used.

 

remap (OLDPRT stores the

A string defining the current remapping of the

Empty

character-remapping string

extended character set for printing. The string can

string.

for the HP 82240A Infrared

contain as many characters as you want to remap, with

 

Printer)

the first character being the new character 128, the

 

 

second being the new character 129, etc. (Any

 

 

character number that exceeds the string length will

 

 

not be remapped.) See the example below.

 

line length

A real number specifying the number of characters in

80

 

a line for serial printing. This does not affect infrared

 

 

printing.

 

line termination

A string specifying the line-termination method for

Control

 

serial printing. This does not affect infrared printing.

characters

 

Note that control character 13 is the carriage return

13 and 10.

 

and 10 is the line feed.

 

 

 

 

Parameters without modified commands can be modified with a program by storing new values in the list contained in PRTPAR (use the PUT command).

Example: If the remapping string were “ABCDEFGH” and the character to be printed had value 131, then the character actually printed would be “D”, since 131–128=3 and “A” has the value zero. A character code of 136 or greater would not be remapped since 136–128=8, which exceeds the length of the string.

PTPAR

PTPAR is created when you use the Periodic Table, and it stores the current pointer position information.

STARTED

If it exists, the STARTED variable is evaluated when the command-line editor is evaluated.

D-8 Reserved Variables