> 
> I looked at modifying the ncr53c9x to pass the proc but that would involve
> extensive changes (such more than i would want to make).  I might be able
> to cheat and only do vmapbuf/vunmapbuf on KA46/KA48/KA49.
> 
Yep, that would be simple (until a better solution comes):

	if (vax_boardtype != VAX_BTYP_49)
		return;

or similar in vmapbuf/vunmapbuf. The quick solution :-)

> Also today I found out that the KA49 (and related designs) use a slightly
> different mechanism for their SGMAP.  Since they have a SGEC, they only have
> a 8192 entry SGMAP in dedicated SRAM.  So the vsbus_dma needs adapt to this
> difference. 
>
Does it have special RAM for it (as the Qbus adapter) or does it use
the main memory on a special place (as the KA46)?

-- Ragge