[mod.computers.vax] What is at 777500 on a MicroVAX II?

bon@JPL-VLSI.ARPA (10/20/86)

From:	JPLLSI::BON          30-SEP-1986 15:37
To:	ST%"info-vax@sri-kl.arpa",BON         
Subj:	What is at 777500 on a MicroVAX II?

When I do   SHOW/UNIBUS   within SYSGEN on our MicroVAX II, it shows
something at CSR address 777500.  The rest of the devices I can identify
but not this one.  I have been told that 777500 appears on the CSR list
for all MicroVAX IIs.  Does anyone know what it is?  Thanks.

				Bruce Bon
				Bon@JPL-VLSI.ARPA

ray@vuw90x.UUCP (Ray Brownrigg) (10/26/86)

Any PDP-11 person would probably recognise that address as the first
non-console serial interface CSR address (usually associated with vector
address 300). I suspect that it is the second serial port on the MicroVAX-II
CPU. (If there is such a thing.)

Ray

-- 
Ray Brownrigg		UUCP: {alberta,ubc-vision}!calgary!vuwcomp!dsiramd!ray
Applied Maths Div, DSIR		ACSnet:	ray@dsiramd.nz
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