On Mon, 08 Jun 2009 02:39:40 +0100, Jon Harrop wrote: > Ken T. wrote: >> On Sun, 07 Jun 2009 11:16:46 -0400, Lew wrote: >>> So the good old days are a matter of degree and self-deception - it >>> was easier to fool ourselves then that we could at least guess timings >>> proportionately if not absolutely, but things definitely get more >>> unpredictable over evolution. >> >> As I recall I could get exact timings on my 6502 based Commodore 64. >> The issues you speak of simply weren't issues. > > Let's not forget Elite for the 6502 exploiting predictable performance > in order to switch graphics modes partway down the vsync!
That actually didn't require predictable timing. You could tell the video chip to send you an interrupt when it got to a given scan line. I used this myself. Elite was cool though. I wasted many hours playing that game. -- Ken T. http://www.electricsenator.net Duct tape is like the force. It has a light side, and a dark side, and it holds the universe together ... -- Carl Zwanzig -- http://mail.python.org/mailman/listinfo/python-list
