Nonpareil status

[brouhaha]

(11-19-2022 04:19 PM)Mark H. Shin Wrote:  Were able to determine the actual mapping (reg/bit) for the unused annunciators?

No, I haven't done that yet. I don't have a 10C. A friend in California has a 10C which, years ago, he was willing to make available for ROM dump, but it was the original flex-circuit-and ESD-film version which is hard (at least for me) to probe. Since someone has since dumped the 10C ROM, that's no longer necessary, but that was also how I was going to figure out the display mapping.

If someone shot a video of the HP-10C keyboard/LCD test, so we could see the segments active at each step, we might be able to figure it out non-invasively.

If the LCD self-test for the 10C uses the same register bit patterns as that for the 12C, then it doesn't cover register 9 bit 6 and register 10 bit 6. On the other Voyagers, those are BEGIN and RAD. On the 10C, those appear to be the "G" annunciator (not "g"), or whatever the 10C has in its place, and the middle segment of the third digit from the left (not counting the leftmost negative sign). We should be able to identify the bit positions of all other segments, through.

Perhaps also someone with a 10C could take a photo of the all-segments-on display at the end of the ON-multiply self-test.