Pro Audio AM626 Instrukcja Właściciela Pobierz pdf (Strona 14)

AM-PC 4.0 Release Notes Page 11

DSS-10518-00, Rev. A01

Although Corel SCSI (and other ASPI programs) support devices like WORM drives

under DOS, AMOS directly supports only the following SCSI devices:

AM-625 (Tandberg 3660)AM-626 (Tandberg 3800)

AM-627 (Tandberg 4100)AM-628 (Tandberg 4200)

AM-645 (Exabyte 8200)AM-647 (Archive Python)

Plus most SCSI CD-ROM and disk drives.

You can set up subsystem disk drives on the SCSI bus for use under AMOS provided

they are not used by DOS. To define a SCSI subsystem drive under AM-PC 4.0, gen-

erate a driver using FIXLOG and specify SCZPC as the base driver. Although you can

specify a number of read-ahead blocks, we don’t recommend you do this under AM-

PC because the AMOS processor is responsible for moving data from the disk drive

into memory and therefore takes CPU cycles away from the applications running un-

der AMOS (unlike the AM-4000, which has a DMA controller for moving SCSI data).

Subsystem drives to be used with AMOS must first be formatted with FMTSCZ.

If you do use SCSI subsystem drives, keep in mind that AM-PC still requires a

bootable AMOS disk file (AMPC40.DSK) on another drive. Subsystem drives con-

trolled with the SCZPC driver cannot be made bootable, so you cannot MONTST

from them.

You can’t use write buffering under AM-PC 4.0. Again, this is due to the lack of a

DMA controller for SCSI data movement under AMOS.

There is no SCSI interlock between AMOS and DOS. You must ensure that DOS and

AMOS don’t try to access the same resource at the same time. For example, don’t

start a SCSI tape backup under DOS and then try to use MTUSAV under AMOS.

We don’t recommend you attempt to swap back to DOS with ALT/F10 while doing

something with the SCSI bus. Wait until SCSI activity has finished before going back

to DOS.

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Pro Audio AM626 Instrukcja Właściciela Strona 14