Reference Guide

3-160 Full Command and Function Reference
The character set in the HP 82240A Infrared Printer does not match the character set of the
calculator:
• 24 characters in the calculator’s character set are not available in the HP 82240A Infrared
Printer. (From the table in Appendix J, these characters are numbers 129, 130, 143-157, 159,
166, 169, 172, 174, 184, and 185.) The HP 82240A prints a  in substitution.
• Many characters in the extended character table (character codes 128 through 255) do not have
the same character code. For example, the « character has code 171 in the calculator and code
146 in the HP 82240A Infrared Printer.
To use the CHR command to print extended characters with an HP 82240A Infrared Printer, first
execute OLDPRT. The remapping string modified by OLDPRT is the second parameter in
PRTPAR. This string (which is empty in the default state) changes the character code of each byte
to match the codes in the HP 82240A Infrared Printer character table.
To cancel OLDPRT character mapping in order to print to an HP 82240B Infrared Printer, purge
the PRTPAR variable. To print a string containing graphics data, disable OLDPRT.
Access: …µ OLDPRT
See also: CR, DELAY, PRLCD, PRST, PRSTC, PRVAR, PR1
OPENIO
Type: Command
Description: Open I/O Port Command: Opens a serial port using the I/O parameters in the reserved variable
IOPAR.
Since all Kermit-protocol commands automatically effect an OPENIO first, OPENIO is not
normally needed, but can be used if an I/O transmission does not work. OPENIO is necessary
for interaction with devices that interpret a closed port as a break.
OPENIO is also necessary for the automatic reception of data into the input buffer using non-
Kermit commands. If the port is closed, incoming characters are ignored. If the port is open,
incoming characters are automatically placed in the input buffer (up to 255 characters). These
characters can be detected with BUFLEN, and can be read out of the input buffer using SRECV.
If the port is already open, OPENIO does not affect the data in the input buffer. However, if the
port is closed, executing OPENIO clears the data in the input buffer.
For more information, refer to the reserved variable IOPAR in appendix D, “Reserved
Variables”.
Access: …µ OPENIO
Flags: I/O Device (–33), I/O Device for Wire (–78)
Input/Output: None
See also: BUFLEN, CLOSEIO, SBRK, SRECV, STIME, XMIT
OR
Type: Function
Description: OR Function: Returns the logical OR of two arguments.
When the arguments are binary integers or strings, OR does a bit-by-bit (base 2) logical
comparison.
• An argument that is a binary integer is treated as a sequence of bits as long as the current
wordsize. Each bit in the result is determined by comparing the corresponding bits (bit
1
and bit
2
)
in the two arguments as shown in the following table: