VAX-11/780 Memory

[Dave Martindale]

>From my understanding of how the memory is remapped when the Interleave Enable
bit is turned on (it appears that sequential locations from each controller
remain in order but alternate, like a perfect cut and shuffle of a card
deck at the quadword level) I can't see how UNIX could survive turning on
the interleave bit once it had already been loaded into non-interleaved
memory.  The bootloader could do it more easily - it could make a copy
of itself that would reassemble properly when interleaving was turned
on, and then very carefully enable interleaving and jump to the new
code.  The simplest, and ugliest way would be to simply have the *boo.cmd
files on the floppy that boot the machine stuff the appropriate numbers into
the memory controllers to set their base addresses and enable interleaving.
Anyone out there with interleaved memory on a 780 who can tell us what you
do?

For 750's, can you even put multiple memory controllers on them?
If so, are they able to do interleaving?

Dave Martindale