alen@ttidca.UUCP (Alen Shapiro) (11/13/86)
I am attempting to draw onto the mac screen in real time using my own very fast 3 line 68000 code memory-to-memorymap copy function. There seems no way to tweek this code so that I can redraw full screen images at full 60 Hz refresh rate. Since I have all the images I want to display "in core" is there a way to retarget the video display mechanism to read from other areas of memory (I have more than 2 images so the alternate screen buffer (which may go away in future) does not seem to be a help). I currently achieve better than 30 frames per second - but really need 60. --alen (the Lisa slayer) shapiro
DMB@PSUVMA.BITNET (11/24/86)
About drawing extremely fast, just a guess, probably a miserable idea but..
Anyone every try just changing the value of screenbase I think it's $824 if i'm
not mistaken, and setit to the current bitmap image that you want? I don't know
what would happen.
dave