out71 - a filter to send a program to an HP-71B
out71 [-o] filetype < input_file > output_device
out71 -?
The HP-71B Handheld Computer fitted with the HP82401A HPIL Interface module can read files not only from a mass storage device but also from any other HPIL device. In the latter case, the HP-71B expects to receive a 32 byte header which is identical to the file’s directory entry on a LIF volume, followed by the file data padded (by NULLs in the case of out71 ) to a multiple of 256 bytes. This program always sends a file called PCFILE of the user-specified file type.
out71 adds the header and padding, and can therefore be used to translate a linux file for direct sending to an HP-71B, for example via an HP82164 RS232 interface.
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-o |
Some HP-71 files have their length (in their directory entry, and thus in the header added by out71 ) given in nybbles. out71 assumes that all the nybbles in a linux file are part of the HP-71B file, and thus always sets this nybble length to an even number. This can cause problems if the original HP-71B file had an odd length in nybbles. The -o option decreases the nybble count in the header by one, effectively truncating the last nybble of the linux file. | ||
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-? |
Print a message giving program usage to standard error and exit. |
filetype
Specify the type of the HP-71 file to be created. A complete list of possible filetypes can be found in lif_create_entry.c, but the useful ones for this program include TEXT, BASIC71, LEX71 and SDATA. This parameter is case-insensitive.
hardware/* : Information on connecting an HP-71B to a PC
If an HP-71B is connected to the linux device /dev/cua0 via a suitable interface and mytext is an HP text format file, then
out71 TEXT < mytext >/dev/cua0 will send the file to the HP-71B, which should be set to receive it, e.g. by the command COPY :RS232 TO MYTEXT
The data expected by an HP-71 when reading a file from a non-mass-storage device is documented in the HP-71 HPIL Internal Design Specifications Volume 1.
The -o option is not elegant, but there is no automatic way to decide when an HP-71 file has an odd length in nybbles.
in71(1)
out71 was written by Tony Duell, ard@p850ug1.demon.co.uk and has been placed under the GNU Public License version 2.0