neese@adaptex.UUCP (06/13/90)
>/* ---------- "Can a NCR PC916 handle first party" ---------- */ >I'm having a lot of trouble with running Adaptech SCSI controlers >on my NCR PC916 with ISC 2.0.2. The errors indicates that the machine >does not support "firs party DMA" whatever that might be. Can anyone >confirm if the NCR PC916 supports "first party DMA" ? Actually, there is a first party DMA test in the BIOS of the 154xA board and later. It is located at dc00:9. If the system passes this test, then you have a very good chnace that first party DMA will work in that system. If not, then the adapter will not function in that system. I do not have any information on the NCR machine, but would like to hear if this test passes or fails. I will then include it in my machine data base on adaptex. First party DMA refers to the fact that the 154x board is a bus master and uses it's own DMA for all data transfers. It is a high speed DMA capable of supporting 10MBytes/sec. Default is 5MBytes/sec. It is programmable in 50ns increments for both read and write independent on each other. Roy Neese Adaptec Senior SCSI Applications Engineer UUCP @ uunet!swbatl!texbell! {cpe,merch,nominil}!adaptex!neese uunet!mlite!adaptex!neese