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HP11C ++
02-16-2022, 03:54 PM (This post was last modified: 02-16-2022 03:59 PM by J-F Garnier.)
Post: #4
RE: HP11C ++
No need to move chips.
Since this 20-years old post, we got "true emulators" (meaning: that use the genuine ROM), starting from Nonpareil (well, it didn't use the "genuine" ROM but that's not important here).
And the result is: nothing happens if you plug more RAM registers.

To make the 15C ROM use the extra registers, several ROM locations must be changed (patched). SwissMicros and a few others did it.
I'm not aware that it has been done or is even possible with the 11C.

My hypothesis about the special 11C mentioned in the original post: it may be a HP-15C board mounted inside a HP-11C housing.
Since the 11C and 15C keyboards are very similar, it may give the impression, with just a quick inspection, of a 11C with 448 program steps.
Of course I may be wrong.

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Messages In This Thread
HP11C ++ - Mike T. - 01-30-2022, 02:04 PM
RE: HP11C ++ - damaltor - 02-16-2022, 10:11 AM
RE: HP11C ++ - Dave Britten - 02-16-2022, 03:14 PM
RE: HP11C ++ - J-F Garnier - 02-16-2022 03:54 PM
RE: HP11C ++ - Dave Britten - 02-16-2022, 04:23 PM

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