Hello!
What is the general solution in case of 23-bit Blitter and FastRAM? It seems to me that VDI should copy all FastRAM data to ST-RAM first before it allows Blitter to work on them (similarly to what you must do with sound data).
Yes.
How is this solved in all those FastRAM expansion cards (Afterburner, Centurbo, CT60)?
You need to use NVDI (that don't use a blitter). In case of ct60 most of the common TOS-VDI routines are patched to copy the data first into ST-RAM or such thing. There are some comments about this in the ct60 docu or look here an answer of Didier: http://bbs.dhs.nu/ct60/index.php?request=1345
Regards, Frank -- ATARI FALCON 060 // MILAN 060 ----------------------------------------- http://www.cs.uni-magdeburg.de/~fnaumann/ e-Mail: fnaumann@freemint.de