Aucbvax.4187
net.2bsd-bugs
utzoo!decvax!ucbvax!pur-ee!purdue!jrs
Sat Oct  3 03:14:07 1981

	While installing the 2.8BSD software, I encountered the
	following problems.  The fixes listed below appear to
	work on our system.

	1) ~/standalone/bootstrap/M.s

		I could not get a kernel with an instruction space
		bigger than 56K in size to load, even though we
		are running on a 11/70 which has split I/D.
		It appears that the last kernel I space mapping register
		was getting set to point to the I/O page regardless
		of the fact the we were running split I/D.

185a186,191
> 	cmp	_cputype,$40.	/ Do not check for split i/d on 40s
> 	beq	1f
> 	bit	$4,SSR3		/ fix so that we can load kernel ispace >56k
> 				/ on split i/d machines
> 	bne	2f
> 1:
186a193
> 2:

	2) ~/src/dev/xp.c

		I had problems getting reports of disk errors printed
		on the system console when we had a bad spot on a disk
		pack that we were using.  It appears that the recalibrate
		function that is issued clears positioning in progress
		significantly long before it actually returns the drive
		to a device ready state.  We are using the Emulex SC70
		controller on a CDC9766 drive.  Unfortunately, we do not
		have any DEC disk drives left so I do not know if the
		problem extends to these devices also.

512c512
xpds & PIP)
---
> 				while((XPADDR->xpds & (PIP | DRY)) != DRY)


					- Jeffrey R. Schwab
					  Purdue University Computing Center
					  West Lafayette, Indiana 47906

					  pur-ee!purdue!jrs

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