Path: utzoo!attcan!uunet!cs.utexas.edu!sdd.hp.com!hplabs!hpl-opus!hpnmdla!darrylo
From: darrylo@hpnmdla.HP.COM (Darryl Okahata)
Newsgroups: comp.sys.handhelds
Subject: Re: Questions about HP48SX ROM revisions.
Message-ID: <1570003@hpnmdla.HP.COM>
Date: 28 May 90 23:59:33 GMT
References: <1990May28.143516.459@uoft02.utoledo.edu>
Organization: HP Network Measurements Div, Santa Rosa, CA
Lines: 59

In comp.sys.handhelds, grx1042@uoft02.utoledo.edu (Steve Snodgrass) writes:

> 1: Everyone seems to have ROM Rev. A.  Does any other revision even
> exist yet?

     I've seen and played with a 48SX with a ROM Version "C".  I've
heard (in comp.sys.handhelds) that version "D" exists, but I haven't
seen one.

> 3: This last may be a dumb question, since it may be marked on the
> calculator, or more likely the manual tells you how to find this out,
> but since I don't have the thing yet, I thought I'd ask how you
> identify which revision you have?

     Instructions are at the end of this message.  These instructions
were originally posted here some time back.

     -- Darryl Okahata
	darrylo%hpnmd@hpcea

===============================================================================
From: madler@tybalt.caltech.edu (Mark Adler)
Date: Sun, 11 Mar 1990 03:19:51 GMT
Subject: Re: hp48sx ROM revision
Organization: California Institute of Technology, Pasadena
Newsgroups: comp.sys.handhelds


I neglected to say in the ROM bug listing how to tell the ROM revision.
Here's how:

1. Turn the calculator on (press ON and then release).

2. Press ON again, and while holding it down, hit the "D"
   key (the fourth white key in the top row) and then release
   the ON key.  You should get three vertical lines in the
   display, one down the middle.

3. Hit the backspace key (it says DROP and CLR over it).
   You should get some meaningless hexadecimal in the first
   line of the display.  (Mine says 705D9:1B8D...).

4. Press and hold down the EVAL key.  It should say:

      Version HP48-*
      Copyright HP 1989

   where the * is an uppercase letter (A, B, etc.) indicating
   the ROM version.

5. Release the EVAL key.  Hold down ON and hit "C" (the third
   white key in the top row.  This is a general reset
   operation that returns the calculator to normal from the
   diagnostic stuff (which is where ON-D puts you).

I'd be very interested if anyone gets anything but revision A.

Mark Adler
madler@hamlet.caltech.edu