Qbus split I&D?

Johnny Billquist bqt at update.uu.se
Mon Mar 16 07:45:11 CDT 2015

On 2015-03-16 13:43, Johnny Billquist wrote:
> On 2015-03-16 13:40, Roe Peterson wrote:
>> Was the J11 chipset (11/73, 83, and 93) the only qbus processor with
>> separate instruction and data space?  And did 2.9BSD ever run without it?
> Yes, the J11 is the only chipset that have split I&D space. All other
> I&D space processors were made with several boards.
> And yes, as far as I know, 2.9BSD should be able to run on a J11. I
> don't remember if it was capable of taking advantage of split I&D space,
> but I think it was.

Doh! Misunderstood the last question...
As far as running 2.9BSD without split I&D space, I've definitely read 
about it being able. I think it was mentioned somewhere, that this was 
the last version known to be able to do this.


Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol

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