On Tue, Dec 16, 2008 at 2:58 PM, Ken Barber <[email protected]> wrote: > > On Dec 16, 2008, at 12:27 PM, Andrew Farnsworth wrote: > > On Tue, Dec 16, 2008 at 1:10 PM, Ken Barber <[email protected]> wrote: >> >> Uh... you ARE aware that the ZX81 didn't have an OS, aren't you? Just >> BASIC in a ROM, nothing more. > > Yep, not an OS in modern terminology > > Not an OS in the terminology of the day, either. > What it was, was sheer brilliance. Written by mathematicians at Cambridge, > it was pure genius in its optimization of both hardware and code. For > instance, there was no video card -- the processor generated the screen > display and only ran its apps during the "blank" times between TV frames.
I'm familiar with that, but my feeling is that it worked like the Atari 2600 where the screen buffer was one scan-line, and the processor would be interrupted at each scan. Michael -- Michael Darrin Chaney, Sr. [email protected] http://www.michaelchaney.com/ --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "NLUG" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nlug-talk?hl=en -~----------~----~----~----~------~----~------~--~---
