Geoff Winkless wrote: > border scrolltext jerking around occasionally It can be difficult to synchronise an interrupt routine exactly when the CPU is busy in the foreground - when the interrupt occurs the CPU has to finish the current instruction first. Could this explain it in your case? It's better to have the CPU sitting on a HALT when the time-critical interrupt occurs so the timing is the same every time.
> As an aside, does anyone still have a real live SAM linked up - Well, I still have mine available, although it's not been set up for almost a year... > I can't tell whether this problem is due to something in my > code or SimCoupe's emulation > - I'm pretty sure it never -used- to do this... As someone who put in a lot of work getting the SimCoupe CPU timing more accurate, I'm hoping this isn't the case - but I can't guarantee it :-) Dave.
