A4091 performance

[ChaosLord]

You should do some tests of the A3000 SCSI.

I conducted extensive timing tests many years ago and the A3000 onboard SCSI rawked hard.

Unfortunately I don't remember the exact speeds I got but it was something like:
A3000 SCSI 25Mhz 030 cpu usage during HD use: 2%
A4000 IDE   25Mhz 040 cpu usage during HD use: 98%

A3000 was at least 2x the speed of my A4000 at loading things, even though the A3000 was using an older controller and an older hard drive.

It might have been 3x the speed... I just can't remember... tooo many years ago.

I remember that it was no problem at all to burn CDs on the A3000.  No buffer underflows.  Everything geat.  In spite of the A3000 having a CPU that was 3x slower than the A4000.

[ChaosLord]

Its not hard to fix any broken drivers as long as you find a programmer who is interested in the subject and can get the source code.

You could prob even get RedSkullDC to do it without source code.

RedSkullDC> I donno anything about hard drive drivers.

Don't worry

You just need to flush the cache after loading some DMA data.  Problem solved.  Presto!  (That is the simple explanation).  I think there may be a fancier more elegant thing you can do with the MMU but this is outside my realm.

Thor can explain anything about these cache coherency problems to any competent haxx0r and we can get this problem fixed.  Thor hangs out on the Natami forums and is easily reached there.  Put "Cache Coherency" or "MMU" in the title of your forum post and he is 512% likely to read it and teach you all the magic spells u need to know.