On Saturday, July 11, 2020 at 11:22:36 AM UTC+1, Edward K. Ream wrote: > > On Sat, Jul 11, 2020 at 5:06 AM jkn <jkn...@nicorp.f9.co.uk <javascript:>> > wrote: > > QQQ > Hi Edward > Wow ... this goes back to ... Windows 3.0, maybe earlier? It was the > 'only known use' of the Grey Alt key for me back then. > There used to be a table in the original IBM PC manual (small hardback > ring binder affair with clip in pages) with > all the three-digit decimal codes you could type, and the characters you > would get as a result > > Who knew indeed? (not a dig, I'm sure there are other things going back > that far that I don't know about). Those were the > days when you got the BIOS assembly listing in the reference manual... > QQQ > > Hehe. I remember those days. I rewrote a screen driver in assembly > language to increase its speed by a factor of 10. Have no idea why I > bothered :-) > > Edward >
I worked with someone who wrote an alternative 'dprintf' (Direct printf()) in assembly - it had a cut-down list of format specifier support, but also extended it in a few ways, to suit our work. This was for visualisation of a multimedia system. So you could specify a bar graph with a given screen position and width etc., then feed it a value and it would use the block codes of the IBM character set in (mode 7, was it) to dynamically show this. There were a lot of other bells and whistles as well. It was c-r-a-z-y fast, even on an 80286... John Goodman, I wonder where you are now... -- You received this message because you are subscribed to the Google Groups "leo-editor" group. To unsubscribe from this group and stop receiving emails from it, send an email to leo-editor+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/leo-editor/b743956d-e335-4ea3-80d4-aed5c549c148o%40googlegroups.com.
