HP Forum Archive 20

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30b power on key codes (Q for Katie Wasserman) Message #1 Posted by Harry Jacobson on 1 Oct 2011, 5:46 p.m. If this information is elsewhere in the forum, excuse me! I didn't find it. In a post about a year ago in the thread Re: HP 30B not in blister pack Katie Wasserman wrote, Quote: ....What's the date on the firmware? To check that: 1) Turn off 2) Press and hold PMT 3) Press ON 4) Press DOWN 4 times Thanks, Katie How interesting! My question is, what other power on key codes are there and what do they do? Thank you, Harry Edited: 1 Oct 2011, 5:47 p.m.

Re: 30b power on key codes (Q for Katie Wasserman) Message #2 Posted by Katie Wasserman on 1 Oct 2011, 8:19 p.m., in response to message #1 by Harry Jacobson Is there nothing online that lists the HP-30b/20-b self tests? Gee, I thought that Gene would have done that if not HP. At any rate they are: - Screen Test, press INPUT to start and press to cyle through the 12 different displays - Keyboard Test, press each key at least once in any order. Once they have all been pressed the test ends. - Checksum, the number of the left side of the decimal point should equal the number on the right side of the decimal point. - Battery Test, this is the voltage of the batteries. They are in parallel so it's sort of an average. - Software Version, date of the firmware. - Copyright message (also shows the amount of non-volitile RAM used by the firmware, should always be 2048, I think). - Test System, pressing INPUT will toggle the test system on/off. The test system was used in development but when on will run the calculator somewhat faster and burn through batteries at lightning speed. - Slow Clock, you can adjust the clock speed a little bit. I forget if this had a noticeable effect. - Serial, I'm not sure. I think that this allows debugging of the serial interface that's used in the Test System. Some of the above are guesses, please correct me if you know better. -Katie Edited: 1 Oct 2011, 8:20 p.m.

Re: 30b power on key codes (Q for Katie Wasserman) Message #3 Posted by Marcus von Cube, Germany on 2 Oct 2011, 6:56 a.m., in response to message #2 by Katie Wasserman If you look into the sources of the SDK you can learn about the serial and test system stuff.

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