Qbus split I&D?

Pete Turnbull pete at dunnington.plus.com
Mon Mar 16 08:03:55 CDT 2015

On 16/03/2015 12:45, Johnny Billquist wrote:
> 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?

> 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.

AFAIK, that's correct - 2.9BSD doesn't need split I&D, but 2.11BSD does.


Pete Turnbull

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