GXDUMP v3.0				Mika Heiskanen
							mheiskan@delta.hut.fi

This programs dumps a binary image of HP48GX calculator. The image will be
suitable as is for various emulators and disassemblers, but one should make
sure by reading the documentation of the respective program.

Usage in detail:

	o Download a xmodem program to your PC, for example the one at
	  ftp://ftp.tu-bs.de/rz/pub/pc/msdos/modem/dsz.exe
	o Download GXDUMP to your HP48.
	o Execute GXDUMP program on the HP48.
	o Execute 'dsz port 2 speed 9600 d rx dump' on the PC. The status
	  display will immediately show the progress of the transfer by
	  showing the amount transferred so far. If this does not happen
	  then press the ON key the HP, ALT-N on the PC and try again with
	  'dsz port 1 speed 9600 d rx dump' instead.
	o Both GXDUMP and DSZ will automatically finish once the transfer
	  is complete. The result is in the file called 'dump' on the PC,
	  the size of which is 524288 bytes. The full transfer will take
	  approximately 11 minutes unless aborted by pressing the ON-key
	  on the HP48 or ALT-N on the PC.

Mathhew Mastracci noted that the nibble order dumped by the original
GXDUMP is not correct for emulators such as EM48 for DOS. Thus I made
a second version which does the nibble reversing while dumping so
that further postprocessors are not needed. The instructions for this
program, named gxdump2 in this package, are the same as before.

Unfortunately I do not have a list of which nibble ordering each
disassembler or emulator uses. However if the documentation for the
program recommends using ROMDump then one should use GXDUMP2 since
the problem was detected by comparing ROMDump and GXDUMP outputs.