14 Jan
2013
14 Jan
'13
12:47 p.m.
On Mon, Jan 14, 2013 at 01:30:42PM -0500, Dave McGuire wrote:
I maintain that a Qbus PDP11 with a Unibus adapter
isn't *just* a Qbus
PDP11. ;)
Nah it's more than that -- it's a hilarious joke for screwing with the minds
of I/O drivers, which detect the UMRs and think they're on a mapped system
but then it turns out that RH70s aren't the only thing using unmapped DMA,
but there's no sure way to know what's Q and what's U.
Fun for all concerned! :-)
John Wilson
D Bit