On Fri, Sep 6, 2019 at 4:32 AM Matt Burke via cctalk
wrote:
> I'm not sure if the adapter needs to request the purge at the end of
> each block transfer. The driver may do this anyway but I'll have to
> check the source listings.
I would definitely check source listings. Also, check BSD/Ultrix
_
On 9/5/19 9:22 PM, Josh Dersch via cctalk wrote:
> I have a pretty good grasp of
> Unibus mechanics these days but I'm not quite understanding the reasoning
> behind this. Here's what the Storage System Unibus Port Description
> (AA-L621A-TK) document says:
you might also want to ask on the si
On 06/09/2019 05:22, Josh Dersch via cctalk wrote:
> What I do not understand is (a) why such purges are necessary, and (b) how
> the MSCP controller knows when one should occur. The Port Description doc
> hints that it has to do with repeated access to a given area of memory.
> The DW780 document
