INPRT.DOC File

                  (c)  Hewlett-Packard Company, 1990


OVERVIEW
--------

The INPRT application reads infrared (IR) printer output from different
Hewlett-Packard calculators into the HP 48 stack.  INPRT assumes that the
incoming bytes would print with the Roman 8 character set on an HP 82240
printer, and it remaps these bytes to the HP 48 character set (ISO 8859
Latin 1).


PROCEDURE
---------

These are the steps for transferring IR printer output to the HP 48:

 1.  Transfer the INPRT file from your computer to the HP 48. (Use binary if
     you're transferring INPRT from the HP 48.) The {INPRT} menu label will
     show up in your HP 48 VAR menu. (If your calculator has a double-
     spaced print mode, set it to single-spaced print.)

 2.  Line up the calculators.  (See "Alignment Instructions" below.)
     [Note: Do not remove the HP 48SX's port cover; I/R transfer actually
     works better with the port cover in place.  -jkh-]

 3.  Press {INPRT} on the HP 48.  (INPRT terminates in 10 seconds if no IR
     output is received.)

 4.  Execute the print command on the other calculator.

 5.  Repeat steps 2 through 4 as needed to transfer additional output.

RESULTS
-------

When the transfer is complete, the HP 48 returns the received data to the
stack in the form of a string to level 2 and a flag to level 1.  If the flag
is 0, uncorrectable transfer errors were detected; if the flag is 1, there
still may be missing bytes. The 1 means that each byte that was detected was
received correctly.  You should still check the received data since there
may be a linefeed in strings, names, expressions, etc. more than 24
characters long. If the flag is 0, each byte that was not correctable is a
gray blot (character number 127) in the level 2 string.


ALIGNMENT INSTRUCTIONS
----------------------

The calculators should be no more than 0.5 inches (1.3 cm) apart for the
transmission.  Also, other alignment issues apply to several calculators:

  o  For the HP 41:  The IR printer module should be in one of the top
     ports, and the shiny "IR cone" in the center of the module should be
     aligned between the E and T of HEWLETT on the HP 48's Hewlett-Packard
     logo.

  o  For the HP 27S, HP 17B, and HP 42S:  The calculator must be raised 0.3
     inches (0.75 cm). The center of the LED (which is located at the top
     end of the calculator in line between the E and W of HEWLETT) should be
     aligned between the E and T of HEWLETT on the HP 48's Hewlett-Packard
     logo.

  o  For the HP 28, HP 18C, and HP 19B:  Just line up the calculator's LED
     between the E and T of HEWLETT on the HP 48's Hewlett-Packard logo.