|Re: HP-49G+ ROM....|
Message #2 Posted by James M. Prange on 16 Sept 2003, 1:52 a.m.,
in response to message #1 by Speck
I don't know about the 1.20 ROM, but the 1.22 ROM is available for
Given the differences between the 49G and the 49G+, I'd be surprised if
the ROM for one could be used on the other. But I don't have a 49G+ yet,
haven't tried the 49G+ ROM, and so I really don't know.
Maybe someone could try a 49G+ ROM on a 49G (either actual hardware or
emulator) or vice versa?
Judging from the documentation available at
UserRPL (and, I guess, SysRPL) source code for the 49G+ and 49G should
be very similar.
From posts on the newsgroup comp.sys.hp48, I understand that some (but
not all) libraries written for the 49G work on the 49G+.
Yes, the ROM of a 49G, at least in later revisions, could be used to
upgrade the ROM of another 49G via a serial connection between the two
As for the 49G+, it seems to me that it wouldn't be possible to
establish communications between two 49G+s via USB, but perhaps via
IrDA? Or maybe the "Serial IR" used in the 48 series is still available
on the 49G+? I would hope that it would be possible to transfer the ROM
image to an SD card, and then move the card to another 49G+ to update
I've read that the 82240B printer works with the 49G+, so apparently the
49G+ can use the "RedEye" protocol as well as IrDA.
Speaking of printers, I wonder whether HP will be marketing an improved
printer. Martel Instruments has some nice-looking printers listed at
http://www.martelinstruments.com/cased.html. I wonder whether an
MCP8830 would work with the 49G+'s IrDA.
So many questions, so few (certain) answers.... I suppose we'll just have to be patient.