low-end vaxen and unix

[Michael Sokolov]

Ken Wellsch <kcwellsc at math.uwaterloo.ca> wrote:

> On a KA410 (VAXstation 2000 etc.) the MFM controller and the NCR 5380
> both do DMA to a shared 16Kb private memory buffer.  You then have to
> pull your data out into the regular VAXen memory.  I believe the Lance
> chip (ethernet) is the only DMA to main memory capable device.

Correct.

Michael Sokolov
TUHS 4BSD Coordinator
4.3BSD-* Maintainer
Quasijarus Project Principal Architect & Developer
Phone: 440-449-0299 or 216-217-2579
ARPA Internet SMTP mail: mxs46 at k2.scl.cwru.edu
TUHS WWW page: http://minnie.cs.adfa.edu.au/TUHS/
Quasijarus WWW page: http://minnie.cs.adfa.edu.au/Quasijarus/

Received: (from major at localhost)
	by minnie.cs.adfa.edu.au (8.9.1/8.9.1) id JAA18090
	for pups-liszt; Sat, 30 Jan 1999 09:54:52 +1100 (EST)