Can a NCR PC916 handle first party
neese at adaptex.UUCP
neese at adaptex.UUCP
Thu Jun 14 01:16:00 AEST 1990
>/* ---------- "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!
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