There is actually a pretty substantial amount of people posting to the list
regularly who are not members from the email address they regularly post
from.
I'm betting this is mostly due to people who are posting from email
addresses other than the ones they typically receive list traffic on. Please
take the time to subscribe to the list from all the email addresses you want
to post from (this won't cause duplicates if you set the 'no-email' flag to
yes for that email address'es subscription). If you won't bother to take the
time to register your email addresses, then you can't expect me to take the
time to approve all your regular postings manually. They'll get rejected.
Thanks!
Jay West
>Date: Mon, 29 May 2006 23:58:48 -0300
>From: "Alexandre Souza" <alexandre-listas at e-secure.com.br>
> Well, there is - believe it or not - 16MB 30-pin SIMM. I always thought
>it was a mistake, but I saw that with my own eyes. Unbeliaveable as it can
>be, there is only ONE equipment I saw using that, which is a Equinox (or
>Ensoniq?) music keyboard. It was the first and last time. I hadn't ever
>stopped to think how can it be possible (maybe a non-standard pinout) but it
>is true indeed, 16 MB SIMMs, four of them making 64MB. Believe it or not.
The 16 MB 30 pin SIMM is not uncommon in the early Macintosh World.
The Mac II used 30 pin SIMMs and had a theoretical maximum of 128 MB
of RAM when all eight sockets were populated with 16 MB SIMMs.
I write "theoretical" because I think that there were *details* until
the SE/30 and IIcx came out around 1989. The IIx (later than the
II, but earlier than the SE/30 and IIcx) required PAL SIMMs (not sure
what these were, except they apparently had a PAL on board) to use
larger capacity SIMMs.
Anyway, the SE/30, IIcx and IIci all had eight SIMM sockets capable
of using 16 MB 30 pin SIMMs giving a 128 MB memory capacity back in
the very late 80s and early 90s. Quite a forward looking memory
capacity for the day. Of course, it was years before you could
actually get SIMMs with such high capacities.
Later Apple Mac models with the same CPU chips were built with lower
maximum RAM capacities for no apparent reason other than marketing
weenies. Compare, e.g., the SE/30 and the Classic II or Color
Classic.
The pinout is standard. There are 12 address lines available on the
30 pin SIMM, giving a multiplexed address of 24 bits which translates
to 16M addresses.
Pin Name Description
1 VCC +5 VDC
2 /CAS Column Address Strobe
3 DQ0 Data 0
4 A0 Address 0
5 A1 Address 1
6 DQ1 Data 1
7 A2 Address 2
8 A3 Address 3
9 GND Ground
10 DQ2 Data 2
11 A4 Address 4
12 A5 Address 5
13 DQ3 Data 3
14 A6 Address 6
15 A7 Address 7
16 DQ4 Data 4
17 A8 Address 8
18 A9 Address 9
19 A10 Address 10
20 DQ5 Data 5
21 /WE Write Enable
22 GND Ground
23 DQ6 Data 6
24 A11 Address 11
25 DQ7 Data 7
26 QP Data Parity Out
27 /RAS Row Address Strobe
28 /CASP Something Parity ????
29 DP Data Parity In
30 VCC +5 VDC
Sets of four 30 pin 16MB SIMMs typically go for about $25 plus
shipping on Ebay.
Jeff Walther
I havent been following this thread thus far, but if
anyone is shipping a scanner to the UK (unless this is
a joke and I havent gotten it yet) and its not at
least usb 1.1 compliant, they need to reconsider.
Blowing bucks to ship an older technology is just
dopey as all get out. Dont mean to be insulting, but
in the interest of he getting something done (as image
files take a considera ble time to upload from the
scanner to the puter) let it be usb. I dont have a
spare unfortunately though.
--- cctech-bounces at classiccmp.org <cisin at xenosoft.com>
wrote:
> > > If some others would chip in on the shipping,
I'd gladly send you a
> > > scanner. Would you prefer SCSI or "Centronics"?
> On Wed, 7 Jun 2006, Tony Duell wrote:
> > I don't care, provided it comes with schematics
and uses chips that I
> > recognise :-)
>
> I kinda doubt that even the old HP scanners had
schematics available.
> However, the operation of a scanner is not too
complex to reverse
> engineer.
> I guess that we still can't get you to accept one,
even for free, without
> open hardware source.
>
> > > Would you also like some early Pentium machines,
a Beseler enlarger and a
> > Pentium machines cannot be early :-)
>
> True
> I meant relative to Pentiums.
>
> > > "dichroic" head, a Kodak Caramate, some printers
and monitors, ...?
> > As for the enlarger, I have enough problems
hosuing my DeVere 504....
>
> > > Howabout: a Fujinon holography camera?
> > > 'course it's all 60Hz stuff.
> > Does it _depend_ on the mains frequency? Votlage
conversion is trivial (I
> > have a 110V step-down transformer in the workshop
anyway), frequency
> > conversion can be more of an 'interesting' job.
>
> I'd be tempted to do it "mechanically", with a motor
and generator.
> 8" drives may need 50 v 60 Hz (or a change of pulley
and belt).
> But almost everything else recently is rectified to
DC.
> Most "modern" computers just want 5VDC, 12VDC, etc.
> The only electronics in the holography camera is the
power supply for the
> laser tube. And since I don't have the original
tube, a different power
> supply is not a very big deal.
>
__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com
All:
I want to add a real time clock to the Altair32 but I want
to throw this out there for comment. Would one rather use a "faceless"
RTC (like the Compu/Time) or one with an on-screen display like the
Hayes Chronograph? The Compu/Time is very easy (nearly done coding) but
the Chronograph would be prettier.
Thoughts?
Rich
I was trying to set up my DQ132 to work with my Overland OD3201 yesterday,
and I have a strange problem with it. No matter whether or not I change
switch 10, labeled "22 bit addressing/Extended Features" I get the error
"Extended Features Disabled, Extended Features must be enabled for device
TS:, Device Disabled" when I boot RSTS/E 9.6. It's supposed to have two
modes, TSV05, and TS11/TU80. The mode I want is the TS11/TU80 mode. How do
I accomplish this? The manual doesn't say. Anyone using one of these
cards?
Other things of note:
- I added jumpers to change the way the drives are set as an attempt to set
the modes correctly at pins J9-C to J7-A, J7-B to J8-B, and from J8-A to
J6-A. The reson for this is that my tape drive can ONLY do 1600 or 3200
bpi. It's sort of an oddball that way.
The manual is at
http://www.bitsavers.org/pdf/dilog/2120-0044-3_DQ132_Dec85.pdf
On page 2-5 table 2-3, I the jumper configuration I described above is the
3rd one down. Most of the info is on table 2-5 and 2-6.
There is another section on Chuck McManis' page
http://www.mcmanis.com/chuck/computers/vaxen/dq132.htm that talks about the
DQ132 and mentions jumpers needing to be removed for a Q/CD backplane. Does
the 11/23+ BA11-SE backplane qualify as Q/CD?
Any help would be appreciated!
Julian
Well, thanks to persistance, patience, and people on this list, I
finally fix'ed the vile beast's problems.
Okay, the last step was entirely ignorance on my part, as a timely
call from Paul Anderson this afternoon pointed out my folly:
I didn't know that the CPU was supposed to come up in a RUN mode - I
thought you had to start it.
He had me halt and start the CPU and run a branch-self, it just
looped like it was supposed to.
I now get the console, emulator, so a running OS isn't far off.
I've got two SLUs - anyone know if there's TU58 diag images around? :)
*sigh*
If there's any hobby where ignorance isn't bliss, it's this one.
Thanks again to everyone who assisted!
> I forgot to mention that, because of the "under Windows"
> capability, I prefer Don's TU58 simulator. And I also forgot
> to mention the great help I got from Don, while trying to get
> it working! His help was so good that the TU58 simulator
> *should* have worked. I moved on, to return to it later,
> after my view was cleared. I guess, now is the time :-) I
> know, if you spend too much time too long on a problem, you
> develop a kind of blindness to solve the problem. Leaving and
> returning later often helps ...
I totally agree with this, I think Is hould have interspersed my time a
little better - I tend to work on something way too hard and then burn out,
then wait too long to come back to it to where I forget what I learned.
Hello out there,
A few months ago, I posted here that the Computer Collector Newsletter was
being renamed Technology Rewind. That's still the case, but I realized that
much more than a name change was in order. CCN reached about 1,000
subscribers and that made me feel quite proud, but I couldn't keep up with
the scale. It was simply too much effort to keep publishing without any
source of income, and we (I and the contributing editors) were certainly NOT
going to charge money for this. So instead I decided to make a big change:
CCN-turned-TR would "go blog" instead.
We're quite aware that the web log format will turn off some readers. Some
people insisted that CCN be delivered in raw text as no more than 80
columns, as we were happy to oblige. That made sense two years ago. But
now we think it's equally important to help this hobby grow, and the web is
the place to do it. We'll be sorry to see any of our former readers leave,
so we ask that you give the format a try.
The new address is just http://www.technologyrewind.com but for now it's
something of a beta version. There are plenty of links to be fixed, old
articles to be uploaded, email addresses to nowhere, and who knows what
other bugs we might find.
For the new few weeks, our pace of posting new blog entries will be slow.
We'll ramp us gradually, and there may be more contributors than in the
past.
As always, we welcome your comments and suggestions OFF-LIST please. :)
- Evan
I am new to old vax computer. Help is appreciated.
DEC rtvax 1000 620QY-A2 (1989 or 90?) From hard drive LED and LED display on the back the booting is all fine.
It has two DB9 connectors on the back. I could not get matching monitor. Tried CGA nothing come out. Use DB9 to DB15 connector cable nothing came out on modern VGA monitor. But the monitor senses something and LED in front of VGA became green for a second and became yellow again.
Tried Sony triniton with analog, digital 1 and digital 2 selection on the back, something came out (at least bright) but no characters.
Is this syn issue or analog/digital issue? Any way can I open the chasis and figure out what kind of monitor I need?
How do I prepare one hardware backup plan like floppy and tape similar to floppy and CD on model PC?
How do I restore?
thanks
Henry
Bob Armstrong at www.sparetimegizmos.com is trying to get enough order requests together to meet the numbers necessary to justify a last time parts order of his sbc6120 kit of a pdp-8e work alike clone. This kit is based on the harris hd6120 used in decmates and runs the pdp8 instruction set natively. He left a message on the alt.sys.pdp8 newsgroup. You can contact him at bob at jfcl.com.
He estimates costs at $150 U.S. for a circuit card, cpu chip, static ram and stacking connector. the rest of the parts required are still manufactrured and available thru places like digikey/mouser/newark.
About 50 people built this sbc from the original parts buy, it works.
For $ 150 bucks how can you go wrong?
I'm not in any way related to bob or sparetimegizmos.
But I can't buy one unless others make the bulk parts order cost effective for Bob. He had 18 orders and needed more than twice that much by 10 june to go forward.
