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HP-41 and video interface 82163a / 92198a
05-21-2015, 04:49 PM
Post: #26
RE: HP-41 and video interface 82163a / 92198a
(05-21-2015 09:10 AM)Vincent Weber Wrote:  From the source code I conclude that the escape sequences have been implemented in full, not partially.
Not exactly. The page scrolling escape sequence (Esc S/T) are not implemented (because my DOS emulators are using a single video page) as well as the Esc L/M/Y/Z and other non-HP Esc extensions found in the Mountain Computer MC00701A (aka 92198a).

Quote:But that the reverse video characters are not implemented, as they are 8-bit (>=128) and the code just displays "." for > 127. Am I correct ? Btw this also seems the case for emu71 (dos) since the examples on the web page at the bottom shows reverse video for your windows implementation but not for dos...
Yes, no inverse video support on my DOS emulators. Frankly, this has never been an issue for me (well, except maybe with the HP-75C that uses such inverse characters).
Contrary to Christoph's excellent work, I never targeted full compliance with the original equipments, just a high level of compatibility.

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RE: HP-41 and video interface 82163a / 92198a - J-F Garnier - 05-21-2015 04:49 PM

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