On Saturday, July 11, 2020 at 6:22:36 AM UTC-4, 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 :-) >
I remember them too, hehe ... I rewrote a buggy parallel port driver in my Sanyo MS-DOS level clone (i.e., it used a non-IBM bios and hardware). I had to wind the new code in and out through unused stretches of bytes to find enough room. I was forced into doing this because my printer sometimes printed screwy output, caused by a bug in the BIOS error handling. -- 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/e8f071fc-aee6-414c-a6a7-c95f80ab1f54o%40googlegroups.com.
