[net.unix-wizards] Interleaved memory on 780

ry@cadre.UUCP (10/14/84)

	As far as I know interleaved memory is not standard on
780's. (At least it was an upgrade for us.)

	Both vms and 4.2 unix require the same change to the boot floppy
to handle interleaved memory. The following four lines must be added
after the line with INIT and before the line LOAD BOOT in defboo.cmd

	DEPOSIT 20002000 101	! SET UP INTERLEAVED MEMORY\015
	DEPOSIT 20002004 4000	
	DEPOSIT 20004000 101
	DEPOSIT 20004004 4000

This correctly configures two memory controllers for interleaved operation.
I suspect the procedure is similar if you have more than two.

	Russell Yount
	cadre!ry

dmmartindale@watcgl.UUCP (Dave Martindale) (10/26/84)

If you have the old MS780-C memory, then a single controller does no
interleaving.  If you have two of these controllers, you must add several
"DEPOSIT" commands to the defboo.cmd command file on the floppy to
set the "interleave" bits in the controllers before loading UNIX.

If you have the newer MS780-E memory, then a single memory box actually
has a pair of controllers which are normally interleaved; you don't need
to do anything to turn it on, and thus can use the defboo.cmd unmodified.