halazar@mit-amt.MEDIA.MIT.EDU (Michael Halle) (03/11/90)
I called calculator support a couple of days ago, and the guy said the following: 1. Only ROM revision A is "out there", 2. In general they don't upgrade calculators to new ROM revisions. Someone previously mentioned that they will upgrade if the defect if fatal to your work, so this statement is apparently not without exception. Beats me why the "anomaly list" (oh please, give me a break) has defects for A-D revisions. I guess that's the lead time the chip plant has on the final product. --Michael Halle Spatial Imaging Group MIT Media Lab mhalle@media-lab.media.mit.edu
madler@tybalt.caltech.edu (Mark Adler) (03/11/90)
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