Whats the specifics on the AWS95 PDS Card?
The AWS95 PDS Card (known as “Pisces”) has two main functional additions to the Q950. The first is that it includes an external level-2 cache for the Quadra’s 68040. The cache size is 128K, but this can be increased with Apple provided SRAM upgrade kits. The use of a L2 cache increases the base performance of the Q950. The second capability that Pisces includes is the addition of two additional upgraded SCSI buses. Pisces fully supports Direct Memory Access (DMA) on these SCSI buses. This can greatly increase SCSI throughput by offloading SCSI operations to the PDS card. The card supports active termination and negation on the 2 SCSI DMA buses, improving signal quality and integrity.
The AWS95 PDS Card (known as “Pisces”) has two main functional additions to the Q950. The first is that it includes an external level-2 cache for the Quadra’s 68040. The cache size is 128K, but this can be increased with Apple provided SRAM upgrade kits. The use of a L2 cache increases the base perfor- mance of the Q950. The second capability that Pisces includes is the addition of two additional upgraded SCSI buses. Pisces fully supports Direct Memory Access (DMA) on these SCSI buses. This can greatly increase SCSI throughput by offloading SCSI operations to the PDS card. The card supports active termination and negation on the 2 SCSI DMA buses, improving signal quality and integrity.
