Hi.

I got it: MicroVAX 3100-95
KA51-A V2.6, VMB 2.15
This is a 83.3MHz NVAX. Nice. :-)

>> NetBSD/vax boot [Aug 19 2001 05:57:49] <<
[...]
NetBSD 1.5ZC (GENERIC) #0: Sun Mar 31 10:51:52 PST 2002
    matt@pilot.local:/tmp/vax/obj/sys/arch/vax/compile/GENERIC

MicroVAX 3100/m{90,95}
cpu0: KA51, ucode rev 2
total memory = 127 MB
avail memory = 114 MB
using 1663 buffers containing 6652 KB of memory
mainbus0 (root)
ibus0 at mainbus0
ze0 at ibus0
ze0: hardware address 08:00:2b:ab:cd:ef
uba0 at ibus0: Q22
vsbus0 at mainbus0
vsbus0: 8K entry DMA SGMAP at PA 0x27000000 (VA 0x9156e000)
vsbus0: interrupt mask 0
dz0 at vsbus0 csr 0x25000000 vec 524 ipl 15 maskbit 3
dz0: 4 lines
lkkbd0 at dz0
wskbd0 at lkkbd0 (mux ignored)
lkms0 at dz0
wsmouse0 at lkms0 (mux ignored)
asc0 at vsbus0 csr 0x26000080 vec 510 ipl 15 maskbit 1
asc0: NCR53C94, 25MHz, SCSI ID 6
scsibus0 at asc0: 8 targets, 8 luns per target

I am a bit confused. ibus _and_ vsbus?
What is the technical difference between both?

I had a look in sys/arch/vax/vax/ibus.c and the QBus is always attached,
there is no probe for the actual presence of a uba. So I am not sure if
the machine really has a uba. "sh q" on the boot prompt gives no answer.


It has two strange "Centronix" HD connectors at the back labled A and B.
Below the A and B are two arrows like on the serial lines. There are two
PCBs on the back of the connectors with some "UC80234Q", "UC80385Q"
chips, LC line filters and some chips I can not identify. They are
covered with a shielding plate, that can not be removed without causing
permanent damage. The two PCBs are connected via one 100 pin IDC
connector to the main board. So: No QBus but lots of async lines? 

Hmmm???? HMMMM!!!!
Ahhhh!!!!
OK. There is a QBus. I have KA680 and the KA680 TM. The "CQBIC" chip
that identifies the TM as QBus interface is "21-25927" and this Chip is
also on the KA51 board. 
There is SCSI (NCR 53C94), SGEC (21-28059), SCC (21-24924), ...
There is a 21-27668. 21-27667 is a SHAC. So is there also DSSI? The PROM
knows about DSSI, but "sh dssi" gives no answer.

There are two unused 100 Pin IDC connectors at the back of the main
board. Is this the QBus?

There are some SubD-HD connectors on the front of the main board to take
PCB modules. There is one module that has a EPROM, two 21-25974 and a
21-34600. What is this? 
[...]
OK. An other Question I can answer my self: Under the sticker with the
part number there is "waverley async" etched into the PCB. So no QBus
break out conectors but ??? async lines. Are there any docs for this? It
would be nice to write a driver for that adapter...

Last, but not least: It seams that the current boot blocks do not
support booting from a local SCSI disk. Correct? 
-- 



tschüß,
         Jochen

Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/