[pups] roll-your-own-unibus boards?

David Evans dfevans at bbcr.uwaterloo.ca
Tue Jan 20 23:58:31 AEST 2004


On Mon, Jan 19, 2004 at 10:39:33PM -0800, Michael Davidson wrote:
> Several people have built IDE controllers for the QBUS.
> 
> ftp://digital.dp.ua/DEC/ata/README.txt
> 

  This one even claims to have a Unibus variant!

> Yes, but assuming that you are only implementing programmed i/o
> there will be so little logic involved that you might as well just use
> discrete TTL.
> 

  I think that's what the above gizmo does.  However, a DMA engine may not
be difficult with the appropriate FPGA.

-- 
David Evans                                         dfevans at bbcr.uwaterloo.ca
Ph.D. Candidate, Computer/Synth Junkie     http://bbcr.uwaterloo.ca/~dfevans/
University of Waterloo         "Default is the value selected by the composer
Ontario, Canada           overridden by your command." - Roland TR-707 Manual


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