>>So what does it want for input? Don't know if this is a stupid question,
>>but am asking since I've never actually used XXDP+ and I didn't get any
>>documentation at all with the Packs, despite the fact that the rest had
>>related Docs.
>type 'STA'. It will prompt you for some information which will be
>pretty intuitive... stuff like the hardware address to use, the unit
>to format, whether you want bad blocks revectored, etc...
If he couldn't figure out the answers to the VS2000 formatter, he's
not going to have any easier time with ZRQC! Remember, he's formatting
disks that have never been formatted on a VS2000 or RQDX3 before, so
he needs all the numbers necessary to MSCP-qualify the disk.
Here's the RD52 numbers, straight from the RQDX3 DEC-internal docs:
Quantum Atasi
------- -----
Sector Interleave 1:1 1:1
Bytes/Sector 512 512
Sectors/LBN 1 1
LBNs/Track 17 17
Tracks/Group 8 7
Groups/Cylinder 1 1
Cylinders/Unit 512 645
Total LBN's/Unit 69632 76755
RBNs/Unit 168 168
RCT Size (Blocks) 4 4
RCT Copies 8 8
DBNs/Unit 8 8
XBNs/Unit 54 54
User LBNs/Unit 60480 60480
User Capacity (Bytes) 30965760 30965760
Step Pulsewidth (usec) 11.2 11.2
Step Rate (usec) 17.6 17.6
Write Precomp (nsec) 10 10
Precomp Cylinders 256-611 320-644
And, for completeness, the RD51 and RD53 numbers (though I suspect
the DEC tables have typos for at least some of the RD51 quantities):
RD51 RD53
---- ----
Sector Interleave 1:1 1:1
Bytes/Sector 512 512
Sectors/LBN 1 1
LBNs/Track 18 17
Tracks/Group 1 8
Groups/Cylinder 4 1
Cylinders/Unit 306 1024
Total LBN's/Unit 22032 139264
RBNs/Unit 144 280
RCT Size (Blocks) 36 5
RCT Copies 4 8
DBNs/Unit 87 82
XBNs/Unit 57 54
User LBNs/Unit 21600 138672
User Capacity (Bytes) 11059200 71000064
Step Pulsewidth (usec) 11.2 11.2
Step Rate (usec) 17.6 17.6
Write Precomp (nsec) 10 (none)
Precomp Cylinders 110-305 (none)
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology Voice: 301-767-5917
7328 Bradley Blvd Fax: 301-767-5927
Bethesda, MD, USA 20817
>If he couldn't figure out the answers to the VS2000 formatter, he's
>not going to have any easier time with ZRQC! Remember, he's formatting
>disks that have never been formatted on a VS2000 or RQDX3 before, so
>he needs all the numbers necessary to MSCP-qualify the disk.
The version of ZRQC I've used doesn't ask any of the stuff you
supplied in the rest of your post... as I said, what it asks
is pretty intuitively answered (at least it has been for me, and
I've not had to enter any of the values).
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
| Unix Support Engineering Group | (home): mbg!world.std.com |
| Compaq Computer Corporation | addresses need '@' in place of '!' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg |
+--------------------------------+-------------------------------------+
At 11:13 21-09-98 -0400, William Donzelli wrote:
>> Less S/370s out there? I would think, since they are more recent vintage,
>> there would be more. Any reason why? I'll keep my eyes peeled for you
though.
>
>I think is simply the prestige of the S/360s. After all, they are probably
>the single most influential computer family of the 1960s. The S/370s just
>do not have the same magic in their name.
I can agree with that about their influence. IBM had the marketing
horsepower and exposure to put them in many banks, insurance companies,
factories, etc. more so than say, Buroughs, CDC and any of the other big
names of the day. Computers back then were a BIG and Important Investment
to a company. IBM made sure everyone got that feeling through their marketing.
Ever hear much of an IBM 1130? Any info on the web, etc. on that machine?
>
>> Yeah, even my beige box 9370 is boring as heck to look at :-( (It's a CMOS
>> version of the S/370 from 1987/88.) No interesting front panels, can't
>> tinker with hardware much at all, etc. Pah!
>
>Even the last of the machines tagged "System/370" started to lose their
>panels. By the time the 3033 and 4331 came out (mid to late 1970s), the
>panels were gone. IBM used the same cabinets until recently switching over
>to the black and red (very sharp looking) S/390s.
>
>S/370 panels are amazing. Unlike the S/360 panels, they are black with all
>sorts of color coding, and liberal use of the hexadecimal knobs for
>setting the registers.
>
>I would like to find a picture of any old S/370 on the Web, but I have not
>come accross one yet.
Interesting that there is no pics to be found so far. I recall seeing the
S/370 console at the Deutsches Museum in Munich several years ago. It was
amazing indeed at least for that model, to see such a neat operating panel.
Wish I had taken some detailed photos of it then I could have someone scan
and post them for everyone to see.
Anyone have any sales/marketing brochures out there who could scan some
good example photos of S/370's?
>
>> Christian Fandt, Electronic/Electrical Historian
>
>Lets give Chris a big hand for being an Auction helper at the Antique
>Wireless Association meet in Rochester, NY just a few weeks ago. He did
>not drop too many things.
Thanks! I do worry about handling those $750-$1k DeForest Audions that come
through. We've done the auction for many, many years as you may know (how
long have you been an AWA member?). I've helped for at least 18 years I
think. Usually it's myself, Lauren Peckham and his son, David, who are up
there every year and several other old stand-bys in the "sold" area to the
right. Thank God we usually have light weight equipment compared to classic
computers!! However, a few Radiola 60's and the like come through
occasionally and they can get real heavy _real_fast_! The three '30's and
early 40's console radios and the early TV were auctioned while just
setting in place as you saw.
I was kinda sick for most of the day from total exhaustion or more likely
burn-out while working at the conference. I wasn't my usual wise-cracking
self with Lauren and Dave. I had to sit behind the platform for about 15
minutes around 2 PM as I was about to literally drop. That recharged my
batteries, so to speak, and was able to perk me up enough to continue
helping. We had, IIRC, 620 individual lots with a huge number of vacuum
tube lots this year. Quite a few paper lots too. IIRC, $62,400 or so was
sold during the 8 hour duration. New record amounts both in lot quantity
and money. I got a few rather nice items for my collection including a
Crosley 50A Two-step Amplifier with brass-base tipped '01A's for only $150
and a real early version of the Crosley ACE Type V (wooden book condensor,
ceramic tube socket, cylindrical tickler coil) for $130. Somebody was
sleeping on those rather rare items :-) I like Crosleys since they're quite
interesting and SMALL doggone it! It was great to just relax on Saturday AM
and listen to the technical talks.
If any of us get involved with a computer collecting club or association
like the AWA is to Electronic Communications and that club or assoc. begins
to have an equipment auction, and I get involved with helping run the
auction, please haul me away to get my head examined! I'm staying HOME!!!
:-) Imagine lugging around Cromemco, CompuPro or other loaded S100
systems, or DEC RL02 drives, or IBM DASD units during an auction. Those are
truly comparative boatanchors like an RAL-7 or R-390 (old military radios
for the unwashed out there) but we sure love 'em, don't we! ;)
I did not see you. Should have come up to me and introduced yourself.
>
>William Donzelli
>william(a)ans.net
>
Christian Fandt, Electronic/Electrical Historian
Jamestown, NY USA
Member of Antique Wireless Association
URL: http://www.ggw.org/freenet/a/awa/
In short, if the 128D uses 60W, I need a transformer with a VA of
60 or higher, your recommendation around 100?
>>
>>
>> I visited Radio Shack yesterday, and look for a step-up transformer
>> for my European C-128D. They had everything neatly labelled, but
>> how do I find out how many watts it's rated for? It has a measurement
>> called 'V/A Cap' which goes from about 70 to over a thousand. The
>> prices goes up with it.
>
>OK... VA (not V/A...) is Volt-amps. It's called the 'apparent power'
>rating of the load.
>
>Remember that in a DC circuit you calculate the power by multiplying
the
>voltage (in volts) by the current in amps. So the VA unit does have the
>right dimensions to be power.
>
>In an AC circuit, things are not so simple. I'm going to stick to
>sinusoidal waveforms here, BTW and let someone else handle the nasty
>cases. It turns out that if the voltage and current are not in phase
with
>each other (and they won't be unless the load is perfectly resistive),
>then the useful power you can get out of the load - the so-called true
>power - is given by V*I*cos(phi) where phi is the phase angle between
the
>voltage (V) and current (I) waveforms. V and I are the rms values of
the
>voltage and current, as usual.
>
>cos(phi) is called the 'power factor' of the system.
>
>But, the size of the transformer you need is really determined by the
rms
>values of V and I, no matter what the phase shift is. So that, for
>example, if you have a load giving out a true power of 50W, with a
power
>factor of 0.5, then you need to use a 100W transformer to supply it.
>
>What does this mean to you?
>
>I think it's fair to say that 0.5 is an excessively low power factor
for
>any micro. 0.66 would be pretty low as well. So if you (say) see that
>your machine takes 100W, then a 150W or 200W transformer would be
ample.
>A 100W transformer _might_ be OK, but it might be marginal.
Practically,
>I'd probably pick smalllest transformer with a VA rating in excess of
the
>wattage of the computer, and if it doesn't get excessively hot in use,
>it'll be fine.
>
>-tony
>
>
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
< Well, true, but I was more concerned with the more likely outcome of
< flooding. It seems that homes normally stay intact in hurricanes unles
< you get the full force, or unless a tornado gets whipped up. Maybe I'm
Being from LI NY I'm used to hurricanes. I suggested CLEAN NEW garbage
pails to store in as they can be taped closed and tied down. Also they
are less likely to be sold out. We'd get one extra 10gal for water!
Allison
I visited Radio Shack yesterday, and look for a step-up transformer
for my European C-128D. They had everything neatly labelled, but
how do I find out how many watts it's rated for? It has a measurement
called 'V/A Cap' which goes from about 70 to over a thousand. The
prices goes up with it.
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
Hi folks,
I've been trying to reach Paxton Hoag (WHoaglll(a)aol.com).
I've send several e-mail message but apparently I
can't reach him. Maybe his ISP is blocking mine or
something.
I have seen recent posting from him our our list so
I know that he's been out there. If anyone is in
touch with him could you forward this to him?
Perhaps he can contact me on an alternate address,
techniche(a)mediaone.net
Thanks,
Jon
>Remember you are working with mains on exposed metalwork (including the
>transformer core), so don't do this unless you have experience of such
>things.
Hasn't every IMSAI owner experienced 120VAC when they touched the traces
running to the front panel power switch[*] and got a nasty jolt? :-). I've
done it many times, and I'm sure I'll do it again!
[*] Yes, I know it's not necessarily a power switch, but it is on all
of mine (never had write-protectable RAM).
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology Voice: 301-767-5917
7328 Bradley Blvd Fax: 301-767-5927
Bethesda, MD, USA 20817
Hi,
I am currently trying to set up TOPS between my MAC network and PC network.
I have flashcard but apparently am having trouble making the two talk. Is
there any way I can test the flashcard and connector adapter to make sure
they work?
Any pinout and hardware info will be greatly apreciated as well as any tips
on that matter.
Thak you.
Francois
-------------------------------------------------------------
Visit the desperately in need of update
Sanctuary at: http://www.pclink.com/fauradon
>[Too bad emulators don't emulate hardware interfaces...]
>
>Hmm... ANyone got a decent description of the lights/switches on the
>KA-10 frontpanel? I could t
Actually, there is a pdp-8/e emulator (from Doug Jones) which creates
and X-window through which you can actually toggle things in, watch
the lights, etc.... it looks great...
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
| Unix Support Engineering Group | (home): mbg!world.std.com |
| Compaq Computer Corporation | addresses need '@' in place of '!' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg |
+--------------------------------+-------------------------------------+
