hx41rom - a filter to convert a SDATA file which contains a scrambled (packed) ROM image written by the HEPAX WRTROM command to an unscrambled (unpacked) HP-41 ROM file.
hx41rom < Input file > Output file
hx41rom -?
hx41rom The HEPAX ROM can save HP-41 ROM images to a HP-IL mass storage. It creates a SDATA file which contains 4 consecutive HP-41 10 bit ROM word in 5 bytes of the file. A 4K ROM dump is thus stored in a 5120 byte file.
hx41rom unscrambles such an raw SDATA file, storing each HP-41 10 bit word in 2 bytes of the output file, and therefore a 4K image takes up 8192 bytes when unscrambled. The resulting output file, although larger, is easier to process with other programs.
If myrom.hx is an SDATA file with the LIF header removed that contains the packed ROM image then
cat myrom.hx | hx41rom > myrom.rom
will generate a file myrom.rom with the unpacked HP-41 rom image.
hx41rom was written by Joachim Siebold, bug400@gmx.de using code from Tony Duell, ard@p850ug1.demon.co.uk and Christophe Gottheimer, cgh750@gmail.com and has been placed under the GNU Public License version 2.0