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Why does the A2091 SCSI controller run so slowly in the A3000 or A4000?

April 26, 2017A3000 A4000 controller run SCSI

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Why does the A2091 SCSI controller run so slowly in the A3000 or A4000?

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A. Because the A2091 can’t DMA to 32-bit RAM. The Guru ROM for the A2091 can help; also see the A4000 Hardware Guide section on the A2091 for more details on the problem (a pointer to the Guide is at the end of this document), or various programs in the disk/misc and hard/drivr directories of Aminet.