T_Bone tossed in:
Even if the tape media was compatible, the tapes most likely wouldn't be. The vic20/c=64 used really screwy methods to read/write the tapes, and there was alot of undocumented wierdness happening in those drives, concerning timing, etc. I remember Jim Butterfield being interviewed about the possibility of reading these beasts in an aftermarket reader, and he was quite convinced it was next to impossible.
:-) And Jim Butterfield would know, I suppose. I remember his name from the Compute! books for the C64 and Vic 20.
;-) Well, there's always the method of reading the program from tape into the C64, with its own tape drive, then saving it to floppy, and using that to read it on the Amiga. (With the appropriate DOS driver, of course.)
:-( However, some of the old Commodore software would run automatically when loaded, and then disable the break key. This was probably to prevent piracy, but today it just means that the program is that much more difficult to preserve.