[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
Re: rtVAX300 .. need help..
As I mentioned, I have a static-zapped CVAX from the prototype run
of the rtVAX 300 hanging in my cubicle at work. Here are the numbers
stamped on the thing:
(C) (R) DEC 1988
B434-72 A 8923
Which checks out as being a CVAX capable of a 60 ns cycle time.
On Mon, 7 Jan 2013, Holm Tiffe wrote:
What the heck is thisr:
#define KA49_SCSIMAP 0x27000000 /* KA49 SCSI SGMAP */
Just like it says, that would be the scatter/gather map for the
A scatter/gather map is like an MMU for a DMA device; it allows
the DMA device to map between addresses convenient to it and
physical addresses. I've forgotten everything I used to know
about the 53C94, so I don't remember how DMA works.
Main Index |
Thread Index |