x11-calc updated

[brouhaha]

(12-21-2022 11:16 PM)Mike T. Wrote:  I'd like to take the opportunity to say a huge "Thank You" to teenix for letting me have a copy of his ROM for the HP10 and patiently explaining how printing is supposed to work (it was a lot stranger than I thought!).

If I understand correctly, the "10" ROM is actually something Teenix wrote, rather than the actual HP-10 ROM, which has not been dumped. That actually makes it MORE impressive.

The 10 is unique among pre-Saturn HP calculators in not having any electrical interface to the processor bus. The main chip probably contains the equivalent of the Woodstock ACT, ROM, and the printing portion of the PIK/PICK. There's likely to be some kind of test mode HP used at the factory, but it's unlikely that we can find it. It's probable that the only way we'll get the ROM dumped is by decap and photo (the way Peter Monta dumped the HP-35 ROMs).

I need to talk to someone I know who can do decap & photo. Last time I asked, he was both moving his lab, and too busy.