At 22:26 14/08/01, Si Owen wrote:
You'll certainly see the extra delays when writing to ports 248 and above, or when the ASIC is drawing the main screen area. I'm confident that the current SimCoupé is already accurate enough for you to be able to develop your Mode 4 IM2 routines on it and have it run the same on a real SAM.
Thanks for this info. Surprisingly, I'm still using my *real SAM* to program on right now!!!! I generally took 78000 TStates per frame to be the norm for Mode 4 - this roughly equates to Aley's quote of 30-32% memory contention speed loss.
-howard
