From: Petr Stehlik <>
Date: Fri, 24 Dec 1999 16:40:40 +0100


I'm still playing with the new SCSI CD-ROM. I have found out that by
increasing the cache size in CONFIG.SYS I get SCSI errors under
SingleTOS as well. So it's not a MiNT only problem.

In the meantime I switched to combination of HDDRIVER's SCSIDRV and
Julian's SPIN_SD.BOS. The errors (corrupted files) are still present but
it seems to be slightly faster and also more up-to-date.

I have been playing with DMASNOOP and got interesting results. In
SingleTOS it does NOT help but in MiNT it seems to solve all my problems
with 'corrupted' files. Similarly turning CPU Data Cache off helps in
MiNT only.

I don't care about SingleTOS much, the main OS on my machine is MiNT.
Thus I am happy DMASNOOP helps but the speed decrease is too drastic.
See the times TreeCheck needs to check a 11 MB of files on a CD:

SingleTOS ........ 36 seconds
MiNT DC Off ...... 68 seconds
MiNT DMASNOOP .... 142 seconds

I think I'll be talking to Julian about making his SPIN! more AB040
friendly. With AB040 aware SPIN! I could get the speed of SingleTOS but
no errors, hopefully.

I am very interested in your experience with SCSI CD-ROM on AB040.

E-mail:                                    PARCP developer
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Received on ma. jan. 03 2000 - 21:32:03 CET

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