17 May
2013
17 May
'13
8:57 p.m.
On 2013-05-17 19:18, Cory Smelosky wrote:
On Fri, 17 May 2013, Bob Armstrong wrote:
John Wilson wrote:
this is a ridiculous security risk
so that's why MOP had a magic number
Yep, even the DMR has a boot "password", which is just an 8 bit value
set
by dip switches on the board, that has to match up with the MOP message.
They DMA a small program into memory
Ah, I was wondering about that, because there aren't any separate boot
ROMs on the DEUNA. I bet the "small program" is just part of the T11
code.
And I'm assuming that this scheme didn't work on any UNIBUS VAXes - only
PDPs.
I'd assume so as well. On a semi-related note, wasn't it not possible
to netboot a UNIBUS VAX with a DEUNA? I seem to recall that from the
manual. It required an intermediate bootloader or something, right?
Unibus VAXen basically means VAX-11 machines. They booted either from VMB on console
media, or (for the 11/750) from a boot block. No network capabilities there. They could
not even boot from tape.
Johnny