allenb@comix.cs.uoregon.edu (Allen F. Brookes) (03/23/91)
Does anyone know how to do block moves to an 8-24 or 8-24gc card? I can successfully move images to the old style 8-bit video card with block move but when I try it with the 8-24 card it freezes the machine. Tech note 288 says that block moves are not supported for nubus slots but since it works for the standard 8-bit card it seems there should be a way using the 8-24 card. It also does not seem to work when I move bytes. Any help will be appreciated. Allen
Greg@AppleLink.Apple.Com (Greg Marriott) (03/23/91)
In article <1991Mar22.174436.2074@cs.uoregon.edu>, allenb@comix.cs.uoregon.edu (Allen F. Brookes) writes: > > Does anyone know how to do block moves to an 8-24 or 8-24gc card? I can > successfully move images to the old style 8-bit video card with block move > but when I try it with the 8-24 card it freezes the machine. Tech note > 288 says that block moves are not supported for nubus slots but since it > works for the standard 8-bit card it seems there should be a way using > the 8-24 card. It also does not seem to work when I move bytes. Any > help will be appreciated. Many video cards (especially 24-bit ones) must be accessed in 32-bit mode. Use SwapMMUMode to change to 32-bit addressing before accessing the frame buffer on the card and then change back when you're done. (If you were in 32-bit mode before, then leave it that way... :) Greg Marriott Blue Meanie Apple Computer, Inc.