At 05:36 PM 2/11/98 , Matthew Jacob wrote:

>Yes, this is true. But also note that PrestoServe memory cards
>are slave only devices. Assuming a TurboChannel or SBus or PCI
>memory card you're stashing data in you pay for not only the
>CPU cycles of moving the data, but moving it in a really undesirable
>manner (across several bus bridges, little help from a cache
>prefetch, and also providing massive interference for other I/O
>that may be occurring). The tradeoffs are not always obvious.

Actually the PCI card has a DMA engine...
-- 
Matt Thomas               Internet:   matt@3am-software.com
3am Software Foundry      WWW URL:    http://www.3am-software.com/bio/matt/
Nashua, NH                Disclaimer: I disavow all knowledge of this message