Re: NetBSD and VMEbus RAM

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The MM-6230 manual says "

On Thu, Aug 13, 2020 at 4:10 PM Jason Thorpe <[email protected]> wrote:

>
>
> > On Aug 13, 2020, at 12:36 PM, David Brownlee <[email protected]> wrote:
> >
> > - Is the VME memory board DMA capable - if not then the SCSI
> > controller code could end up in a bad place...
>
> Digging to my brain's archives here, but as far as I can remember, the VME
> bus signals are essentially identical to those of the 68000, and so memory
> placed out in VME space (at least on a 68k-based system) would necessarily
> behave the same as memory on the main memory bus, so...
>
> -- thorpej
>
>

-- 
Michael Thompson

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<div dir=3D"ltr">The=C2=A0MM-6230=C2=A0manual says &quot;</div><br><div cla=
ss=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Thu, Aug 13, 20=
20 at 4:10 PM Jason Thorpe &lt;<a href=3D"mailto:[email protected]">thorpej@me=
.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"mar=
gin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1=
ex"><br>
<br>
&gt; On Aug 13, 2020, at 12:36 PM, David Brownlee &lt;<a href=3D"mailto:abs=
@netbsd.org" target=3D"_blank">[email protected]</a>&gt; wrote:<br>
&gt; <br>
&gt; - Is the VME memory board DMA capable - if not then the SCSI<br>
&gt; controller code could end up in a bad place...<br>
<br>
Digging to my brain&#39;s archives here, but as far as I can remember, the =
VME bus signals are essentially identical to those of the 68000, and so mem=
ory placed out in VME space (at least on a 68k-based system) would necessar=
ily behave the same as memory on the main memory bus, so...<br>
<br>
-- thorpej<br>
<br>
</blockquote></div><br clear=3D"all"><div><br></div>-- <br><div dir=3D"ltr"=
 class=3D"gmail_signature">Michael Thompson</div>

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