There are two issues here:
1: The amount of memory
2: The Ramdac
First the memory X rows * Y lines * z bytes/pixel = amount of needed memory
example 640x480x24 bit color would be 640*480*3 = 921,600 bytes or just shy of one megabyte.
The second issue is more problematic and very chip set dependent and even video memory dependent. Also some the "faster" amiga supported chipsets like voodoo 3 do not support all interlace modes. Eitherway, this is very dependent on resolution, bit depth and refresh rate.
