Hello.
I have notice a couple of things since i upgraded from a Blizzard 1230IV at 50mhz to a BlizzardPPC with a 68040 at 25mhz CPU:
First, is that the 68040 appears to be MUUUUCH more cache-depended for its performance. For example, if you disable both caches on a 68030 it will become slower of course, but still retain a relatively decent performance. If you do the same on a 68040, it becomes extremely slow. it feels like a 68020/14mhz or even slower.
Ok, i know that the caches of a 68040 are larger, but that doesn't explain it. Is there a technical reason for this?
My second observation is that the speed benefit of moving from a 68030/50 to a 68040/25 is minimal. Sometimes hardly noticed. Perhaps because of the particularly limited memory bandwith of the BPPC? (IF this is not just a rumour)
