HP Forum Archive 15

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HP Calculator Firmware Message #1 Posted by John Limpert on 28 Apr 2005, 1:21 a.m. Is there a document that lists the differences between the software in the HP-49G, HP-49G+ and HP-48GII? I'm familiar with most of the hardware differences between the models, it's the software that I'm fuzzy on. My understanding is that the HP-49G was an improved version of the HP-48G, and that the HP-48GII and HP-49G+ are improved versions of the HP-49G. Besides hardware dependent items, is there any difference between the software in the HP-48GII and HP-49G+? Does the keyboard on the HP-48GII suffer from the same problems as the HP-49G+?

Re: HP Calculator Firmware Message #2 Posted by Diogenes on 28 Apr 2005, 6:57 a.m., in response to message #1 by John Limpert No such document exists or is necessary. Long time users know there isn't a single new command added to the ROMs of the 49+ from the 49. Supposed bug fixes in the 49+ ROMS have only been to stop excessive battery usage and failed attempts to fix the keyboard problems.

Re: HP Calculator Firmware Message #3 Posted by Arnaud Amiel on 28 Apr 2005, 8:16 a.m., in response to message #2 by Diogenes However, some of the functions have been reimplemented to run directly on the ARM processor, garbage collection for instance and as the ROM is to be used on 48gii and 49g+ some checks are added for the SD card or the screen size. So the 49g+ ROM is different from teh 49G but it is not obvious, as Diogenes says, not many new commands... Arnaud

Re: HP Calculator Firmware Message #4 Posted by James M. Prange (Michigan) on 28 Apr 2005, 10:20 p.m., in response to message #1 by John Limpert As far as I know, no new UserRPL commands, although certain existing commands may behave a little differently, due to being implemented on new hardware or bug fixes (or attempted bug fixes). New SysRPL commands (using extable2): IsApple_ Returns TRUE on my 49g+. IsBigApple_ Returns TRUE on my 49g+. MidApple_ Returns FALSE on my 49g+. I've read a suggestion that MidApple_ checked the SD card, but it doesn't matter whether or not I have the SD card inserted. Using Nosy 4.1, it looks to me as if IsApple_ and IsBigApple_ end up accomplishing the same thing, and IsMidApple_ just does the inverse of IsBigApple_, but I'm not that good at reading assembly code. Perhaps IsBigApple_ and IsMidApple_ are intended for distinguishing a future model from the 49g+ and 48gII? But it seems to me that there ought to be a command for distinguishing the 48gII and 49g+.... In assembly language, the BUSCC command now does something; it's used for accessing the ARM processor. Note that extable2 doesn't seem to have BUSCC; use the opcode 80B instead. See these query results. I've read that there are other new assembly language commands; see this thread. But the project that I've been working on is intended to work on all three of the 49G, 49g+, and 48gII, so I haven't tried any of the new assembly language commands. Regards, James Edited: 29 Apr 2005, 10:01 p.m.

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