bson@rice-chex.ai.mit.edu (Jan Brittenson) (06/28/91)
The following crashes my Rev D HP-48, wiping out the memory, almost
every time I try it.
1. Enable error beeps ("BEEP" in the MODES menu).
2. Store a large program in a variable (one that takes 20+ seconds to
VISIT).
3. VISIT the variable.
4. While the HP-48 is formatting for the edit, press first blue-downarrow
and then up-arrows until it starts beeping. Keep pressing while it beeps.
The uparrows seem to have to follow the blue-downarrow pretty quickly.
5. Watch garbage appear on the display after a while.
6. At the Recover memory? prompt, press YES. All is now gone.
Note that the beeper must be enabled. The clock does not appear to
be making any difference.
It seems the garbage appears on the display about when it should be
done with the ASCII conversion. Sometimes no garbage appears and the
calculator just hangs - that seems to be dependent on the program
size. The more keys are pressed after the buffer is full, the greater
the likelihood of a crash - when it occured to me the first time I
only pressed three, maybe four, extra keys.
---
I didn't crash the HP-48 in 7 weeks, even even while working in ML.
Then it crashes all by itself during an edit, taking a bunch of RPL
programs I hadn't yet backed up along with it. Groan.
I'm interested in knowing whether others can reproduce this.
-- Jan Brittenson
bson@ai.mit.edujmaynard@oac.hsc.uth.tmc.edu (Jay Maynard) (06/28/91)
In article <16710@life.ai.mit.edu> bson@rice-chex.ai.mit.edu (Jan Brittenson) writes: > The following crashes my Rev D HP-48, wiping out the memory, almost >every time I try it. [description of procedure omitted] >I'm interested in knowing whether others can reproduce this. I just tried this on my Rev E machine, and, while it didn't crash my machine, it did seem to go through a system halt: it showed the GATEWAY-48 signon screen for a moment, then returned to the stack display, with USER mode reset and displaying the MTH menu. -- Jay Maynard, EMT-P, K5ZC, PP-ASEL | Never ascribe to malice that which can jmaynard@oac.hsc.uth.tmc.edu | adequately be explained by stupidity. "As far as I'm concerned, 'average skills' means you know that the pointy end of the drill makes the holes." -- Ron Wanttaja, _Kitplane Construction_