Re: "Dispute" oder HP-48GX SN Message #7 Posted by Mike Morrow on 11 Mar 2011, 9:46 a.m., in response to message #6 by Dave Shaffer (Arizona)
Quote:
They certainly did not come with manuals - I got one...
...tell me how to check the firmware version, I will do so.
That's what I'd heard...no manuals. It makes sense, and for the price, it was a great value even without a manual. Does it have an S/N starting with ID7xxxxxxx?
Here's how to determine firmware revision on some Pioneers:
(For models that don't have keys labeled the same as the HP 42S, use that machine's keys which are in the same physical location.)
0. Turn calculator ON. :-)
1. Push EXIT and LOG at same time.
--Starts step-wise self-tests.
2. Push <- (left arrow).
--Displays HEX firmware debugger.
--Example Pioneer displays show 16 nybbles of memory beginning at location:
-----Nybble 023F1 on HP 42S Rev. A
-----Nybble 023F5 on HP 42S Rev. C
-----Nybble 021E8 on HP 17BII Rev. B
3. Push . (period).
--Executes firmware at location shown.
--Letter that then momentarily appears on LCD at left is the firmware revision.
--Display reverts back to HEX display after a few seconds.
4. Repeat step 3 to see revision again, if desired.
5. Push EXIT and SQRT at same time to exit test/debug mode.
--Harmless "Machine Reset" message appears (no memory loss).
The HP 32SII does not have a similar debugger.
The HP 48SX has a similar debugger, while the HP 48GX does not.
RAM locations can be modified with the debugger. Example: On the HP 42S, changing contents of nybble 40300 from 7 (default) to F will (temporarily) double CPU speed. Value resets to 7 after next machine reset.
Edited: 11 Mar 2011, 2:58 p.m. after one or more responses were posted
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