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HP-41 and video interface 82163a / 92198a
05-21-2015, 04:58 PM (This post was last modified: 05-21-2015 04:59 PM by Vincent Weber.)
Post: #27
RE: HP-41 and video interface 82163a / 92198a
(05-21-2015 04:49 PM)J-F Garnier Wrote:  
(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.

Thanks a lot JF for this precise answer.

One thiing I don't understand is why you provided HP82143a emulation: since you don't provide graphics mode, and no scrolling (singe page video mode you said), so you can't scroll the "paper" as well I imagine? What does the 82143a possibly add to the video interface emulation then ?

Lastely, could you confirm that the FMT (format) instruction of the 82162a HP-IL printer does not apply to the video interface, as it seems from both the HP-IL manual and the 82163a manual ? Maybe because to center text you need to know in advance the number of columns you have, which may not be the case with the video interface(s) ?

Many thanks and best regards
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RE: HP-41 and video interface 82163a / 92198a - Vincent Weber - 05-21-2015 04:58 PM

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