Hi there. I am trying to find out whether you can update a ROM version in a 48g. I have one with version K and I want to know if I can put version R on it. If so, does anyone know how it can be done? Thanks,
48g ROM version - Updateable???
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09-14-2006, 05:47 AM
09-14-2006, 06:35 AM
Technically possible but not practical. You would need to open the unit, physically desolder the surface mount rom and install a rev R rom. I leave it you to figure out how to source the version R part...
09-14-2006, 07:04 AM
Can it not be flashed?
09-14-2006, 07:41 AM
Uh, no.
09-14-2006, 09:46 AM
The 48G was made before modern "flash" was even an idea.
09-14-2006, 10:51 AM
Hi, you mean the 48S series was made when flash memory wasn't too common.
When the 48G series was introduced, flash chips were already common, Raymond
09-14-2006, 11:45 AM
I forgot about that! A related question: When did EPROM come out?
09-14-2006, 04:06 PM
Quote: Like many others already told you, I have to say that the ROM content can't be changed easly. But a HP48 with ROM revision K is more or less a collectors item (also depends on the condition). You should try to find somebody close by you who's willing to exchange your one by a R version. IMHO from collectors aspect a HP48 with ROM revision K is much more worth than the more common R revision, when both are in good condition. Cheers Christoph
09-14-2006, 04:11 PM
Is this ROM K 48G one that you put a memory upgrade in?
09-14-2006, 04:23 PM
Sorry guys I gave you the wrong info....It is not a K version but M. Sorry again. Oh and yes that is the one I upgraded (also did an R version)..
09-14-2006, 04:30 PM
Quite right to ask. The K ROM version cannot access more than 128K RAM according to some documentation.
09-14-2006, 06:37 PM
I believe that the HP48 FAQ does mention the memory problems... I vaguely remember it having something to do with the PINIT command and memory corruption in some ROM releases. |
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