I am trying to identify 3 Motorola chips. I searched on the 'net, but
I didn't come up with anything.
The markings are
SCM10071L
SCM10072L
SCM10073L
The chips were produced in mid 1973 and early 1974. All three chips
are ceramic and have 28 pins.
Thanks for any information you can supply.
--barry
I have a old VAXstation 3100/76 I'm playing around with (it's
surprising how much faster the VAX 4000/200 "seems" - guess it's better
memory and I/O bandwidth). The beastie is not-quite-complete (running
it as a VAXserver, and the external SCSI connector has been replaced
with a HD-50 that isn't functional- not sure if that's bad wiring or
bad SCSI chip), but it does have a full 32MB RAM and all the tests it
fails are explainable (?? on the network (since it's not connected,
that's expected), ? on the serial lines (no kb/mouse connected there)
and the external SCSI (nothing connected and known issues).
Anyway-to the question: Neither NetBSD 2.0 or 3.0 will install
successfully. They both segfault, usually during install but once I got
3.0 installed and it was very limited functionality. Officially the
3176 is supported, but is NetBSD known to be tempermental? (I'm not
sure if it's the VAX or the software - VMS boots fine, but if the
system's wonky I won't bother with it anymore).
Can't test NetBSD on my other VAX (4000-200), since SHAC isn't
supported.
I found the manual for CMD 220 on bitsavers... along with a txt file
for the 220A/TM (which is what I have).
Couple of things:
1. Does anyone have the full manual digitized (or a hard copy you don't want
anymore) that covers the 220A (to be exact, CQD-BV220A/TM) ?
2. In the txt file, it has (formatting neatend... (for fixed point font
anyway)):
W1 OUT Reserved (F)
W2 IN SCSI terminator power enabled (F)
W3 OUT Reserved (F)
W4 1-2 IN Eprom Size 512-Kbit or 1-Mbit (F)
W5 OUT 0 Wait State for Eprom Cycles (F)
W6-1 OUT Adaptive DMA enabled (F)
W6-2 OUT Adaptive DMA Dwell Time enabled (F)
W6-4 W6-5
IN IN 0.8-ms DMA dwell time
OUT IN 1.6-ms DMA dwell time
IN OUT 3.2-ms DMA dwell time
OUT OUT 6.4-ms DMA dwell time
W6-5 OUT Block mode DMA enabled (F)
W6-6 W6-7 Auto-Boot for LSI-11 systems without Boot Roms
OUT IN Auto-Bootstrap address = 773000
IN IN Auto-Bootstrap address = 771000
OUT OUT Auto-Bootstrap disabled (F)
IN OUT Auto-Bootstrap address = 775000
W6-8 IN Reserved (F)
The W6-4, W6-5 pair I believe should be labelled W6-3, W6-4, as
W6-5 is documented twice ... and W6-3 is not documented.
Anyone know if my belief/assumption is correct ?
Anyone know what DMA dwell time should be used in a PDP11/83 ?
Should this board be closest to the CPU, or furthest in a an 11/83 ?
Thanks in advance,
-- Curt
> Adrian wrote
> On Sun, Jan 14, 2007 at 01:12:11AM -0000, arcarlini at iee.org wrote:
>>
>> The wiring inside the VAXstation 3100-76 may well be "non-standard",
>> but the external connector works perfectly well with any SCSI
>> cable which physically connects.
>
> I'm a bit confused. I've got an M76 which I'd love to install a later
> version of VMS on (it's currently on 5.5), but everything I've read
> has said
> that the external SCSI connector is DEC-specific and needs a DEC BC09J
> cable
> to attach normal SCSI devices to (a cable which I've not yet found at a
> reasonable price). Is this not the case?
The connector is proprietary to DEC (same one as used in the
DECstations), but the SCSI that comes out of it is standard. Since that
particular connector hasn't been picked up by anyone else (in that
particular sex)- yes, any SCSI cable that physically connects will
work.
On mine I just pull the lid and connect up whatever I need to the
internal bus, although I do have an InfoServer... hmm, possibilities
that don't require a screwdriver.
This is a little ISA card (made in USA!) with a separate 34-pin
header for a 2.88MB floppy drive. There's a sticker marked "1133-11-
04-9 Model 11". There's a row of jumpers labeled 'B1 B2 B3 B4 PR
SE".
Anyone got the jumper settings for this thing? I think that
PR=primary and SE=secondary and that B1-B4 may be drive types, but
confirmation might save some work.
Thanks,
Chuck
While the drive is not strictly on-topic, the contents are - I have a
30GB Quantum drive that did not survive the rigors of the APO mail
system. I have to admit I was in a bit of a hurry on my way out of
Pole and while virtually all of my stuff survived travelling 12,000
miles in the mail system, something must have shifted in my box of
hard drives and some of the components on the bottom of the drive are
damaged and missing. Sufficient packing materials are hard to come by
at the Pole, and I was counting on double-boxing and pink bubble wrap
to be enough - it obviously wasn't. I think a neighboring drive must
have shifted and rubbed on the circuit board of this one, causing a
patch of visible component damage.
The drive itself does spin up, and gives the expected pattern of
blinks on its lone LED, but the machine does not see it. Given that
there are 3 missing resistors of a size smaller than an 805 package
(don't know the names of the really wee parts) and a few bent pins on
a nearby 104(?) pin 0.5mm pitch QFP, the lack of responsiveness
doesn't really surprise me.
If anyone on the list happens to have an unhappy 30GB Quantum drive,
I'd be interested in its board. The P/N on the lid sticker is an
LM30A011.
Worst case, if I can find another similar drive and a scan of the area
of the board near the LED on an intact drive of the same model, I can
probably harvest a replacement chip and some SMT resistors and
transplant them. The damaged chip in question is badged
Lucent/Quantum, P/N "MS24C13 34".
There's no horrible noises from the HDA - typical spin-up/spin-down
noises, so I think there may be a chance to get at this drive, if I
can repair/replace the board. Yes, I know that drives are cheap these
days - I would just like to get at what's on this one.
Naturally, the other drives in the box, including the blank 18GB
workstation drives, are fine... only my boot drive gets dinged. :-/
Thanks,
-ethan
http://www.issue.org.uk/
Loads and loads and loads of V9K stuph. You'll be like
a kid w/a Vic9K in a candy store.
be sure and read the "personal note".
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