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HP Forum Archive 14

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Hp48GII
Message #1 Posted by Andrea on 13 Jan 2005, 3:18 p.m.

We were trying to transfer our Highway Programs from our HP48G+ to a Hp48GII. It would appear that this is not possible. Does anyone have any suggestions of how to get the programs on to the new calculator short of retyping them. Thanks

      
Re: Hp48GII
Message #2 Posted by Jeff O. on 13 Jan 2005, 4:46 p.m.,
in response to message #1 by Andrea

I believe that if the programs are User RPL programs, you can transfer them to a PC as ASCII files, then manipulate with one or more programs written by James M. Prange, available at hpcalc.org, then transfer to the 48GII. If they are SysRPL, I think you are out of luck. I'm pretty far outside my area of expertise here. Searching the Forum archives, hpcalc.org, and the comp.sys.hp48 newsgroup will likely yield far more info than I can provide.

            
Re: Hp48GII
Message #3 Posted by Vieira, Luiz C. (Brazil) on 13 Jan 2005, 10:10 p.m.,
in response to message #2 by Jeff O.

Hi Jeff, all;

I successfully tranfered an User RPL program from an HP48G+ to an HP49G+ (the newer one) the way you mention, after storing the original program in a P.C. After that, I transfered it to the HP49G+ by setting ASCII mode and no translation. It ran O.K., without problems, and I did not change its contents. I guess that the HP48GII will work the same because they both, HP49G+ and HP48GII, seem to be internally compatible.

Cheers.

Luiz (Brazil)

                  
hp49g-
Message #4 Posted by Raymond Del Tondo on 14 Jan 2005, 1:40 a.m.,
in response to message #3 by Vieira, Luiz C. (Brazil)

Hi Luiz,

AFAIK the 49g+ and the 49g- (48gII) use the same OS.

Regards,

Raymond

                        
Re: hp49g- (what a "nickname"...)
Message #5 Posted by Vieira, Luiz C. (Brazil) on 14 Jan 2005, 8:35 a.m.,
in response to message #4 by Raymond Del Tondo

Hi, Raymond;

I remember reading some stuff about these two, and I am not sure if they both share equivalent internals, meaning the same processor, etc. Do you have additional info?

About the OS, I have only two doubts (not about the equivalency you mention, instead about the calculators): what sort of changes should the extra LCD lines in the HP49G+ demand in relation to the HP48GII? And the SD card access? The SD card access may exist in the HP48GII and never be used, but the building of the additional lines in the HP49G+ LCD must be suppressed in the HP48GII, right? I remember Hrast mentioned something about this particular fact when he announced that he was testing his emulators in an HP49G+.

As always, curiosity of mine.

Best regards and thanks!

Luiz (Brazil)

                              
48gII
Message #6 Posted by Gene on 14 Jan 2005, 10:18 a.m.,
in response to message #5 by Vieira, Luiz C. (Brazil)

I have one of these and actually like it.

They have the same internals as much as possible.

The processor is slower than the 49g+ (48Mhz vs. 75?), no SD card and a smaller display. Not sure how that gets handled, though.

I particularly like the color scheme. I've thought about placing the internals of my 49g+ into a 48gII case. :-)

                                    
Re: 48gII
Message #7 Posted by Vieira, Luiz C. (Brazil) on 14 Jan 2005, 11:19 p.m.,
in response to message #6 by Gene

Hi, Gene; are you ewll?

I'm planning to buy an HP48GII, and after what you say, it seems to me it's not a bad idea. In fact, I actually intend buying it not for my own use, instead for, say, "professional" future needs.

And... can I ask you a question? What do you see when the HP48GII is completely empty (no data at all in RAM) after executing MEM? I mean, what is the actual amount of RAM available for the user? If I am not wrong, Iqbal mentioned once that it is smaller than 100KBytes, but I don't recall the correct number. How much is it?

Best regards and thanks.

Luiz (Brazil)

                                          
About 80K is free n/t
Message #8 Posted by Gene on 15 Jan 2005, 9:23 a.m.,
in response to message #7 by Vieira, Luiz C. (Brazil)

n/t

                                                
Thanks! ;-) (n/t)
Message #9 Posted by Vieira, Luiz C. (Brazil) on 15 Jan 2005, 1:39 p.m.,
in response to message #8 by Gene

                              
Re: hp49g- (what a "nickname"...)
Message #10 Posted by Raymond Del Tondo on 14 Jan 2005, 2:35 p.m.,
in response to message #5 by Vieira, Luiz C. (Brazil)

Hi Luiz,

i'm not quite sure, because I don't have a 49g+ anymore,
but I think the 49g+ 'simply' uses an additional
DA (Display Area) for the additional lines.
Maybe the OS can check the existence of those lines somehow,
and map the desired contents there.
If I remember correctly, someone (maybe CG) told me
that you could even load the 49g+ OS into the 'blueprint' 49g,
because the OS knew the amount of display lines...

But as always, the people who are more involved in the
HP-48 spinoffs could perhaps clarify this topic.

Best Regards,

Raymond

NB: DA (=Display Area): All stretched Pioneer machines have
three DAs, namely DA1 (Status), DA2A + DA2B (Main), DA3 (Menu)
*If* the 49g+ has an additional DA, it could be s.t. like DA1B, DA2C, or DA3B.
If it doesn't have an additional DA, the main area and
default number of stack rows coud have been updated.

Maybe at config time, the rowcount is set accordingly.

However, these are all guesses;-)

                              
Re: hp49g- (what a "nickname"...)
Message #11 Posted by Raymond Del Tondo on 14 Jan 2005, 6:06 p.m.,
in response to message #5 by Vieira, Luiz C. (Brazil)

Hi Luiz,

btw the 'nickname' fits nearly
exactly to what the machine is,
namely a reduced hp49g.
No ports, no flash, no upgrade.
As we all know, it's derived from the hp49g,
not the HP-48G(X), so the name 'hp48gII'
goes near to an offense for HP-48 fans.

The only advantages of hp49g-
over the 49g are its color,
its upgraded OS, and its plasic keytops,
despite their questionable quality,
regarding the bouncing/loosing key strokes.

Best Regards,

Raymond

                                    
Re: hp49g- (what a "nickname"...)
Message #12 Posted by Vieira, Luiz C. (Brazil) on 14 Jan 2005, 11:14 p.m.,
in response to message #11 by Raymond Del Tondo

Hi, Raymond;

just to tell you that I actually liked the nickname.

Cheers and thanks for your comments.

Luiz (Brazil)

      
Re: Hp48GII
Message #13 Posted by James M. Prange on 14 Jan 2005, 9:37 p.m.,
in response to message #1 by Andrea

Actually, as long as they're pure UserRPL, exclusive of SYSEVAL and LIBEVAL commands, they probably won't need any "manipulation" at all for a transfer from a 48G+ to a 48gII.

Note that the transfer will have to be in Kermit "ASCII" mode or Conn4x "Text" mode. In general, due to entry point changes, compiled "binary" programs aren't compatible between the 48 series and the 49 series. Note that in spite of the name, the 48gII uses a 49 series ROM, so should be considered to be a 49 series calculator.

Conn4x (XModem based) is faster, but there are a few special cases where the translations go wrong. If the transfer doesn't work with Conn4x, then try HPComm (Kermit based) instead.

The only problem that I know of with Kermit ASCII translations is that, in translation mode 1, 2, or 3, a string with a <CR><LF> sequence will be left as is instead of being translated to <CR><CR><LF> on transfers from a calculator, so on transfers back to a calculator, it's "untranslated" to just <LF> instead of to <CR><LF>. As long as you don't need to view or edit them on the PC, you could use translation mode 0, which is faster too.

The 48gII should be in approximate mode to avoid changing "real" numbers (type 0) that have integer values to exact integers (type 28).

If the programs have (or call) a global name that happens to be a built-in command or reserved varible name on the 48gII, the name will have to be changed.

There are some commands that behave a bit differently. Ask on the comp.sys.hp48 Usenet group if the program doesn't work as expected after you transfer it.

If the program uses SYSEVAL or LIBEVAL, you'll have to check for changed entry points.

Note that libraries, SysRPL programs, and assembly language programs can't be transferred in ASCII mode; you'd need to decompile them and recompile them for the 48gII.

The 48G+ won't supply the power for the level shifter built in to the 48gII's cable, and the 48gII's IrDA won't work with the 48G+'s "Serial IR", so probably the most practical method is to first transfer from the 48G+ to a PC file, and then from the PC to the 48gII.

Regards,
James

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