ok, sorry for being somewhat off-topic, but some folks might be 
interested.. i'm getting closer to booting 4.3BSD on a KA690!
(yeah, im using ultrix's boot blocks for now, since theyre compatible
with 4.3, and use VMB) 
this is the first output from the kernel: 

KA690-A V4.6, VMB 2.12
Performing normal system tests.
66..65..64..63..62..61..60..59..58..57..56..55..54..53..52..51..
50..49..48..47..46..45..44..43..42..41..40..39..38..37..36..35..
34..33..32..31..30..29..28..27..26..25..24..23..22..21..20..19..
18..17..16..15..14..13..12..11..10..09..08..07..06..05..04..03..
Tests completed.
>>>b dua2
(BOOT/R5:0 DUA2)

  2..
-DUA2
  1..0..


Ultrixboot - V4.4  Thu Jan 13 10:47:05 EST 1994

Loading (a)vmunix ...

Sizes:
text = 191072
data = 67584
bss  = 58432
Starting at 0x1554

4.3 BSD UNIX #13: Sat Jun 16 15:37:00 EDT 2001
    isildur@osgiliath:/usr3/build/sys/MLUIN
real mem  = 67076096
SYSPTSIZE limits number of buffers to 107
avail mem = 64728064
using 107 buffers containing 876544 bytes of memory
VAX 4000/500, ucode rev 2
trap type 9, code = 80000c00, pc = 800265af
panic: Protection fault
syncing disks... done

dumping to dev 901, offset 0
dump device bad

?06 HLT INST
        PC = 800270DE
>>>



happy hacking,
isildur