Voyager crash

[Joe Horn]

Just got my first HP-12C and already found a way to crash it which apparently works on all the original Voyagers (not the newer ones apparently). Just key the following:

Type 10 (you don't have to press ENTER).
Press and hold down ON.
Press the top left key exactly twice while still holding ON down.
Release ON (see 0E10 in the display).
Press 1/X --> crash

Although it SEEMS to be an unrecoverable crash (neither ON nor ON/- do anything), you can recover by pressing ON and the top left key again.

The 16C must be in Float mode to do this.

If this was already known, pardon my excitement at rediscovering it.

N.B. Don't leave your Voyager in this crashed condition. It looks like it's turned off, but it's actually running at full power.

[Gilles59]

I confirm the behavior with my 12c Brazil 1986

[BarryT]

Confirmed as well... on my 1988 12c
But also on my:
...1982 10c
...1984 11c
...1985 15c
...1986 16c

Not that it appears to matter, but mine are all USA models.

Yikes!!!

[Jlouis]

I'm trying to unrecoverbly crash all the known TI for a long time. I'm trying all the keys combination.

If know a way to do this, let me know.

[Gerson W. Barbosa]

15C B 1983
15C B 1989
16C A 1983
16C A 1986
12C CN 2000

[DavidM]

Apparently my 1998 Malaysia 12C still has this bug as well.

Keep this up, Joe, and who knows -- maybe you'll find a byte-grabber in the 12C!

Synthetics on a 12C just wouldn't seem as appealing, though.

[Csaba Tizedes]

(09-23-2017 08:09 PM)Joe Horn Wrote:  Just got my first HP-12C and ... just key the following:

Type 10 (you don't have to press ENTER).
Press and hold down ON.
Press the top left key exactly twice while still holding ON down.
Release ON (see 0E10 in the display).
Press 1/X --> crash

OK, I'm curious, how you can figured out this feature?!?
This is 6 keystroke, on 12C has 39 keys, this is (39^4) × (39×38^2) = 1.30E+11 possible keystroke (and I cannot try to think the order is important or not or I must to multiple it something binomial stuff).

So, you just sit at the table and try to push keys and you believe it will happen something?


Csaba

[Steve Simpkin]

(09-23-2017 10:18 PM)DavidM Wrote:  Apparently my 1998 Malaysia 12C still has this bug as well.
Keep this up, Joe, and who knows -- maybe you'll find a byte-grabber in the 12C!
Synthetics on a 12C just wouldn't seem as appealing, though.

I wouldn't be too shocked. You can do synthetic programming on the HP-15C.
http://www.brouhaha.com/~eric/hpcalc/hp1...ant83.html

[Jim Horn]

(09-23-2017 08:09 PM)Joe Horn Wrote:  Just got my first HP-12C and already found a way to crash it which apparently works on all the original Voyagers (not the newer ones apparently). Just key the following:

Type 10 (you don't have to press ENTER). <== Pressed "1" and "0"
Press and hold down ON. <== OK, did that. Display is blank.
Press the top left key exactly twice while still holding ON down. <== Pressed the "n" key twice
Release ON (see 0E10 in the display). <== Display is still blank.
Press 1/X --> crash <== Display is still blank.

My HP 12c Platinum 25th Anniversary Edition, courtesy of HHC 2006, responds as shown above - the first "Press and hold down ON" appears to turn it off and the subsequent steps do nothing to a sleeping calculator. Interesting...

Joe, weren't you at HHC2006? You should have one of these as well and can confirm if mine is goofy or not.

[Joe Horn]

(09-23-2017 10:30 PM)Csaba Tizedes Wrote:  OK, I'm curious, how you can figured out this feature?!? ...
So, you just sit at the table and try to push keys and you believe it will happen something?

Apparently I'm like one of these:



They work without understanding how they attract bugs, but it's good that they attract bugs, because that leads to the bugs getting zapped. That's me to a tee. I don't understand how I attract software bugs, but I totally enjoy watching them get zapped. Great entertainment.

(09-24-2017 04:53 AM)Jim Horn Wrote:  My HP 12c Platinum 25th Anniversary Edition, courtesy of HHC 2006, responds as shown above - the first "Press and hold down ON" appears to turn it off and the subsequent steps do nothing to a sleeping calculator. Interesting...

Joe, weren't you at HHC2006? You should have one of these as well and can confirm if mine is goofy or not.

According to this page (bottom middle), everybody there received one, but I must've either given mine away immediately or not even taken one, because I don't recall ever owning a 12C of any kind. Maybe it went on the door prize table at HHC 2007. In any case, I strongly suspect that NONE of the newer Voyager models with one or two large thin batteries (unlike the older models with three little button batteries) exhibit the behavior described above.

[J-F Garnier]

(09-23-2017 08:09 PM)Joe Horn Wrote:  Type 10 (you don't have to press ENTER).
Press and hold down ON.
Press the top left key exactly twice while still holding ON down.
Release ON (see 0E10 in the display).
Press 1/X --> crash

(09-23-2017 10:54 PM)Steve Simpkin Wrote:  http://www.brouhaha.com/~eric/hpcalc/hp1...ant83.html

Yes, it seems to be the well-known 22-bit shift "feature" of the Voyager series.
Or am I missing something?

J-F

[Joe Horn]

(09-24-2017 07:58 AM)J-F Garnier Wrote:  Yes, it seems to be the well-known 22-bit shift "feature" of the Voyager series.
Or am I missing something?

No, you're not missing anything. That's what it is... although when I stumbled into it I didn't know that it was "well-known", and apparently some of the folks in this thread didn't either, so it was fun to rediscover it.