48G series ROM question



#2

Funny, someone just posted a thread about the HP-35s ROM.

I just had the occasion to use both my 48G and 48G+ the last couple of days. I have some constants I need stored on them and wanted to dig them out to put on my 50g. I noticed that the preloaded constants in the constants library of the 50g (naturally, I suppose) appear to be more up to date than those in the 48G machines' constants library.

I know that for most work, the differences appear generally in decimal places that aren't all that important. But still, it's nice to have the updated (and assumed more correct) numbers.

Is/was there a ROM update for the 48G series? I further suppose that any corrections to constants would appear in such an update. I did a quick poke around and did not even find an oblique reference to a 48G ROM or other kind of update.


#3

There were a few different ROM revisions, although the ROM in those machines is not user-upgradeable. I'm assuming it's a mask ROM chip.

The comp.sys.hp48 FAQ has info about the different versions. Section 3 has ROM info.

http://www.faqs.org/faqs/hp/hp48-faq/part1/


#4

Thank you, Dave. This does answer all my questions. Too bad it's not a flashable ROM. Even though I have the 49g+ and the 50g, I still use my 48g machines from time to time.


Possibly Related Threads...
Thread Author Replies Views Last Post
  HP85 Programmable ROM cardtridge 82929A-service ROM not working- inaki 2 220 04-25-2013, 08:08 AM
Last Post: inaki
  HP10BII+ question (ROM upgrade is possible?!?) Csaba Tizedes (Hungary) 6 325 02-21-2013, 05:19 PM
Last Post: Eric Smith
  shelf life time of a ROM, EEPROM, EPROM vs Mask Rom Guido (Canada) 6 356 01-11-2013, 04:09 PM
Last Post: Thomas Falk
  HP 48G series -> 20 years NACHO 0 130 12-13-2012, 09:40 AM
Last Post: Nacho
  Big ROM - 41 System DEMO ROM Ángel Martin 5 350 10-16-2012, 05:28 AM
Last Post: Ángel Martin
  HP42S ROM question Han 2 164 10-01-2012, 03:15 PM
Last Post: Han
  hp 41 series wire-wrapped connector question. Matt Kernal 3 180 06-19-2012, 01:48 AM
Last Post: Luiz C. Vieira (Brazil)
  Introducing myself... and a question on a weird 48G Cristian Arezzini 12 357 03-07-2011, 11:51 PM
Last Post: Cristian Arezzini
  HP-41 FOCAL to .ROM for Clonix/NoV's (or any other ROM-box) Diego Diaz 6 292 06-08-2010, 01:44 PM
Last Post: Meindert Kuipers
  HP 48G Statistics question Ren 3 153 08-25-2009, 11:54 AM
Last Post: Ren

Forum Jump: