Allison, this was private email, but I figure this may be
actually of interest to the group. There's nothing here
personal, or insulting anyway...
OK. So Allison says the HEX bus 11/44 ran a BSD variant with
networking. I would guess a Q-BUS CPU with memory management
like the 11/23 and 11/73 line should run this BSD variant as
well... what I want to know is, did the kernel fit into 64K in
one segment, or did they spread the kernel across segment
bounderies? If so, how?
I mean, I could see overlays (in the kernel... blech!), but I
don't remember the 11 supporting long long jumps... and address
value was 16 bits, period. Still, I was never great at 11
assembly. Could someone here give a good detailed account of
PDP-11 segment mapping support? Could my stack and register
values be retained and follow while moving from segment to
segment? And how the hell did you tell the memory manager you
wanted to pop to another segment, anyway?
The curious want to know....
--jmg
> Date: Fri, 10 Apr 1998 17:40:32 -0400
> From: allisonp(a)world.std.com (Allison J Parent)
> To: maynard(a)jmg.com
> Subject: Re: You've got to be pulling my chain... (Ethernet)
>
>
> < I find it tough to believe that a BSD kernel with networking
> < fit into the 64K memory segments of the PDP11... The copy of
> < Venix I ran on my 11/23 didn't support networking and the
> < kernel most _definately_ fit into only one segment.
>
> Venix didn't, but IP and friends was developed on PDP11s! It definately
> fit and was run on 11/44s and the like so it would fit on an 11/23. That's
> not to say there wasn't whole lto a swapping goin on.
>
> Allison
>
>
OK, This is mildly on topic. My monitor is an HP 1097C, making
it at least 10 years old. However, I am using it with a modern PC, so
that's where the 'on topic' issue gets a little iffy. I'm sure there
are plenty of people here who can answer this question. A pointer to
a FAQ would be most welcome.
These old monitors are Fixed frequency, unlike our modern
monitors which multisync. The 1097C supports only a 78.125 khz
Horizontal Scan Rate and a 72hz Vertical Refresh Rate. Now a couple
of years ago I foolishly bought one of those cards by Mirage
(www.mirage-mmc.com) which is supposed to be a 'fixed freq video
card'. Actually, it's an OEM Diamond card, basically an S3/968 video
processor with an IBM 52x RAMDAC - ala Diamond Stealth VRAM. The
fixed Freq hacks are basically a resistor (and a jumper selection) to
drive sync over green, and a homebrew PROM to skew the VESA
frequencies for several video and text modes.
It works, but Mirage hasn't been too helpful with getting a
variety of XFree86 modelines, even though they claim to support Linux
and XFree86. They give out _one_ modeline for 1280 x 1024, which they
swiped from the XFree86 distribution in 'Monitors.txt'. For Windows
and Dos, they give out a video driver which seems to work just fine.
It will even display 320x200 full screen (Quake works great in DOS!),
and boots to a functional 80x24 col text mode. How the hell do they
do this?
Here is how I'm calculating my video modes based in the
XFree86VideoModes HOWTO (found in every Redhat 5 distribution):
Dot Clock Per Second
Total Horizontal Pixels Per Line = --------------------------
Horizontal Scanning Rate
Since my refresh rate must be at 72hz to sync with the HP1097C:
Dot Clock
Refresh Rate = -------------------------------------------------
Horizontal Frame Length * Vertical Frame Length
So, it's really more constructive to think of this as how many
pixels _total_ do I need to display in order to get a 72 hz vertical
scan rate with any arbitrary dot clock? In this case I need
Dot Clock
Total Pixels Per Frame (HFLxVFL) = -------------
Refresh Rate
Since I know my Horizontal Pixels Per Line, I can use this to
determine the number of vertical lines which will support a 72 hz
refresh rate.... hmmm, this is where things get sticky. We'll start
with a DCL of 10Mhz...
10Mhz Dot Clock
128 Horizontal Pixels = -----------------------------
78125 hz Vertical Scan Rate
10 Mhz Dot Clock
138888 Total Pixels = ---------------------------
72 hz Refresh Rate
138888.88 Pixels
1085 Vertical Lines Per Frame = -----------------------
128 Horizontal Pixels
Sheesh! A (total) screen resolution of 128H x 1085V? What about
a 20 Mhz dot clock? Well, after graphing the results I quickly
observed this:
S |
T C |
o R R | 128H 256H 384H 512H 640H 1728H **
T E E | x x x x x x
A E S | 1085V 1085V 1085V 1085V 1085V 1085V
L N |
|
DCL ----+------+-------+-------+-------+------- [...] ----+-----
10 20 30 40 50 135
(** Perfect for a usful screen resolution of 1280x1024)
So, based on this, I cannot get small or talored screen
resolutions unless I am willing to accept wide borders and strange
resolutions. Yet my card works....It does _not_ display this
behavior... so I suspect my thinking is to blame. Will someone please
correct me?
Apologies if you consider this post off topic...
J. Maynard Gelinas
> From: allisonp(a)world.std.com [mailto:allisonp@world.std.com]
>
> 802.. eithernet was always 10mbit/s. The 1.5mhz stuff was
> arcnet. They
> are similar in that they are both bus topology using CSMA/CD
> arbitration.
>
Not quite. Arcnet was not a CSMA/CD but token passing, more in common
with Token Ring rather than Ethernet. Arcnet used a bus, but a token
was passed along to each node and that node sent a packet only when it
got the token. Whenever a new node came online the rest of the nodes
would reconfigure and start the token over again. Collisions only
occured when new nodes came on line the first time. IIRC it was
Datapoint that first came up with Arcnet for their multi-user terminals.
For a small number of static nodes the Arcnet throughput was actually
quite good. Whereas ethernet is probabilistic for access, token passing
is deterministic in that you are guaranteed a slice of bandwidth to
every node. At a minimum you always had roughly 1/n of available
bandwidth, where n was the number of nodes. Arcnet degraded in a linear
fashion as nodes were added, but Ethernet degradation can approach
geometric rates, as anyone knows when they see that collision light on
the UTP hub go on solid.
Also, Arcnet was 2.5Mbps. The original version used coax (not Ethernet
thinwire! I think it was RG-92?) into hubs, later versions went to
twisted pair. There was a 20Mbps follow-up from SMC (the primary chip
maker for Arcnet) but it never caught on.
Arcnet was a common networking standard for S-100 systems in the early
to mid 80s, using MP/M and CP/NET from Digital Research. I think it was
one of the first network transports supported by NetWare too.
Jack Peacock
Sam, you have to understand that if people don't feel comfortable
asking questions on this list, even if they are irrelevant, they
won't ask anything at all. You can't intimidate people if you want
them to deal with you.
In response to the original question: the isolinear chips are
supposed to be holographic memory, which is in the works, and will
allow terabytes of storage in several cubic centimeters, just like
on the Enterprise. The nanites have an advanced version of modern
nanomachinery. I would think that .5 micron hard drives are easier
in this case. As for the ancient storage, I think that was magnetic.
Interestingly enough, the classic trek had almost nothing in the way
of computers, though there were plenty of them out there in the '60s
>"REALLY".
>
>Thanks in advance.
>
>On Fri, 10 Apr 1998, Hotze wrote:
>
>> Sorry, but this has been bugging me for quite some time. In Star
Trek, they
>> use "Isolinear" based memory circuts to store information in both the
short
>> and long term. So, from the looks of it, it's some kind of crystal,
and can
>> transmit it's data very quickly, and with no moving parts, so I'm
guessing
>> that it's similiar to today's RAM. Now, for the hard part: It can
hold
>> entire encyclopedia's in tiny amounts. In one episiode, they had
nanites,
>> little robot-bugs that could hold "gigabytes of information," and
were
>> microscopic. Furthermore, in some episodes, they find Chodak and
T'Kon
>> ruins, between 900,000 to 700,000 years old, with half or more of the
data
>> intact.
>> Was crystaline storage ever attempted like this? Is it possible?
>> Feasable?
>> Thanks,
>>
>> Tim D. Hotze
>>
>>
>
>
>Sam Alternate e-mail:
dastar(a)siconic.com
>-------------------------------------------------------------------------------
>Don't blame me...I voted for Satan.
>
> Coming in September...Vintage Computer Festival 2.0
> See http://www.siconic.com/vcf for details!
> [Last web page update: 04/08/98]
>
>
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
Not to beat a dead horse, but I believe Tim's question was relevant. I
read about optical storage using holography well over ten years ago
but am unaware of its present use or status. This may not strictly
qualify as classic computer subject matter but shouldn't we give a 12
year-old a break? Tim should be commended and encouraged for his
interest in computer science and preservation, not hen-pecked over the
fact that he related his question to a Star Trak episode.
Keep asking questions Tim and don't let anybody intimidate you into
silence.
Marty Mintzell
______________________________ Reply Separator
_________________________________
Subject: Re: Is this possible? (Storage) (Off-topic?)
Author: classiccmp(a)u.washington.edu at internet
Date: 4/10/98 2:09 PM
Star Trek is a television show.
Do you really think that this question is appropriate?
Two words... alt.startrek
van
>Sorry, but this has been bugging me for quite some time. In Star Trek, they
>use "Isolinear" based memory circuts to store information in both the short
>and long term. So, from the looks of it, it's some kind of crystal, and can
>transmit it's data very quickly, and with no moving parts, so I'm guessing
>that it's similiar to today's RAM. Now, for the hard part: It can hold
>entire encyclopedia's in tiny amounts. In one episiode, they had nanites,
>little robot-bugs that could hold "gigabytes of information," and were
>microscopic. Furthermore, in some episodes, they find Chodak and T'Kon
>ruins, between 900,000 to 700,000 years old, with half or more of the data
>intact.
> Was crystaline storage ever attempted like this? Is it possible?
>Feasable?
> Thanks,
>
>Tim D. Hotze
.........................................................................
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Date: Fri, 10 Apr 1998 11:14:44 -0700
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From: Van Burnham <van(a)wired.com>
To: "Discussion re-collecting of classic computers"
<classiccmp(a)u.washington.edu>
Subject: Re: Is this possible? (Storage) (Off-topic?)
In-Reply-To: <001001bd64a0$934d3ee0$3167bcc1@hotze>
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At 01:07 AM 4/9/98 -0700, you wrote:
>I agree. Ebay is definitely NOT indicative of "actual market value". Its
>all based on scarcity, and scarcity varies from area to area around the
>country and the world. Someone thinking they got a great deal on a
>complete C64 system for $25 got ripped off since I can pick up something
>similar locally for less than $10.
Well, "actual market value" is exactly what eBay is -- the value of an
object (i.e., what it sells for) on the open market. Ya can't get much
more open than eBay, what with it's internationalism.
As to whether prices on eBay represent what experienced, knowledgeable
collectors will pay, that's another story.
And lastly, yes, values are determined in large part by scarcity. Here in
San Francisco, a postcard with a picture of the Golden Gate Bridge will
cost me 25 cents (or so). In New York, I'd probably have to pay a bit more
for one, and still more if I were in, say, Ayr, Scotland.
Here in the SF area, a lot of computers are readily available, and
affordable. This is a very technically aware locale, and a lot of the
people here were early-adopters of computer technology (unlike, say, parts
of Pennsylvania that are primarily Amish.) So they'll be cheaper here than
elsewhere. So people in PA can either pay higher prices there, buy over
the net (including eBay), or hop a plane to SF.
As a side note, it always makes me laugh when at antique shows when I see
some item for sale for $15 that I know can be bought at Disneyland, brand
new, for $3. But people pay those prices, because not everyone goes to
DLand every year.
>Ugh! Don't do that! Sell it to someone who would appreciate and
>actually use it (like me! :)
That's a tough call. Do you sell it to someone who will use it and
appreciate it for what you paid for it, or do you put it on eBay so you can
pay the property taxes? I haven't got an answer to that one yet.
--------------------------------------------------------------------- O-
Uncle Roger "There is pleasure pure in being mad
roger(a)sinasohn.com that none but madmen know."
Roger Louis Sinasohn & Associates
San Francisco, California http://www.sinasohn.com/
Well, it really depends. After asking my self, I said "No." Then, after
contemplating it, and asking again, I have to say "Yes." First of all, it
deals with the preservation of data, something that collecters must be
knowledgable about, especially if they have origional/interesting software.
-----Original Message-----
From: Sam Ismail <dastar(a)wco.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Friday, April 10, 1998 8:06 PM
Subject: Re: Is this possible? (Storage) (Off-topic?)
>
>This is a Star Trek question and has absolutely no place on this
>discussion.
>
>When posting a message to ClassicCmp, ask yourself this question: "Does
>this REALLY have ANYTHING to do with old computers?" After you answer it
>to yourself, ask it again, but this time put extra emphasis on the word
>"REALLY".
>
>Thanks in advance.
>
>On Fri, 10 Apr 1998, Hotze wrote:
>
>> Sorry, but this has been bugging me for quite some time. In Star Trek,
they
>> use "Isolinear" based memory circuts to store information in both the
short
>> and long term. So, from the looks of it, it's some kind of crystal, and
can
>> transmit it's data very quickly, and with no moving parts, so I'm
guessing
>> that it's similiar to today's RAM. Now, for the hard part: It can hold
>> entire encyclopedia's in tiny amounts. In one episiode, they had
nanites,
>> little robot-bugs that could hold "gigabytes of information," and were
>> microscopic. Furthermore, in some episodes, they find Chodak and T'Kon
>> ruins, between 900,000 to 700,000 years old, with half or more of the
data
>> intact.
>> Was crystaline storage ever attempted like this? Is it possible?
>> Feasable?
>> Thanks,
>>
>> Tim D. Hotze
>>
>>
>
>
>Sam Alternate e-mail:
dastar(a)siconic.com
>---------------------------------------------------------------------------
----
>Don't blame me...I voted for Satan.
>
> Coming in September...Vintage Computer Festival 2.0
> See http://www.siconic.com/vcf for details!
> [Last web page update: 04/08/98]
>
Amen, Sam. Enrico, please use discretion in these issues. Personal
issues should stay between individuals, not aired on the list. Tell us
about your classic computer collection. I'm eager to hear about it.
Marty Mintzell
______________________________ Reply Separator
_________________________________
Subject: Re: TRS-80 Model 4 (128k) for sale
Author: classiccmp(a)u.washington.edu at internet
Date: 4/8/98 3:22 PM
A real gentle-man!
enrico
Sam Ismail wrote:
>
> On Tue, 7 Apr 1998, Enrico Tedeschi wrote:
>
> > You are demontrating AGAIN that you don't care about other people feelings
and
> > problems. You are NOT in charge of policing this mailgroup. If you don't
want
> > to see this sort messages anymore help me to fix my problem.
>
> I'm not going to help you do shit. This is YOUR problem. This is NOT the
> problem of classiccmp! Therefore, DON'T POST YOUR PROBLEMS ON CLASSICCMP!
> I don't post how much of an ass I think you are, so don't post your
> personal crap either! And you'd better bet that when I do take over the
> list, I'll make sure YOU are on the list of moderated members since you
> have proven time and time again that you can't police yourself. So show
> some restraint and respect and KEEP YOUR GARBAGE IN PRIVATE E-MAIL PLEASE!
>
> Sam Alternate e-mail:
dastar(a)siconic.com
>
-------------------------------------------------------------------------------
> Don't blame me...I voted for Satan.
>
> Coming Soon...Vintage Computer Festival 2.0
> See http://www.siconic.com/vcf for details!
--
========================================================
Enrico Tedeschi, 54 Easthill Drive, Brighton BN41 2FD, UK
Tel/fax(+01273) 701650 (24 hours) and 0498 692465 (mobile)
please visit my website at: <http://www.brighton-uk.com>
========================================================
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From: Enrico Tedeschi <e.tedeschi(a)ndirect.co.uk>
To: "Discussion re-collecting of classic computers"
<classiccmp(a)u.washington.edu>
Subject: Re: TRS-80 Model 4 (128k) for sale
References: <Pine.GSO.3.96.980407113208.29252B-100000@shell>
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I am pretty sure that the TI itself works. I plugged in a commodore
5-pin monitor cable. The video pinouts differ, I guess, but the audio
worked. It beeped when I turned it on, and booped whenever I pressed
a key. I checked the modulator box cable, and it's fine. Also, the
box is getting power. Still, the little led on it does not light up,
and ISDN (It Still Does Nothing).
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
>
>This is a Star Trek question and has absolutely no place on this
>discussion.
>
<snip>
>
>On Fri, 10 Apr 1998, Hotze wrote:
<snip>
>> microscopic. Furthermore, in some episodes, they find Chodak and T'Kon
>> ruins, between 900,000 to 700,000 years old, with half or more of the
data
>> intact.
I think 700,000 years old qualifies as being over the ten year mark :-)
-- Kirk
I love the ads, anytime. I don't care how classic equipment is offered
up just as long as it is being made available. I don't have any
problem with commercialism either.
Marty
______________________________ Reply Separator
_________________________________
Subject: Re: Re.: How about a weekly FS/T list? (was Sale postings to
Author: classiccmp(a)u.washington.edu at internet
Date: 4/10/98 12:50 PM
On Fri, 10 Apr 1998, Richard A. Cini wrote:
> How about making Friday the "classifieds section" day? You know, like
> the local newspaper. Although classifieds appear in newspspers daily, it
> seems that one day has many more than the others.
>
> This would reduce the daily FS/T traffic, but still enable people to
> trade stuff. I see ClassicCmp as a great resource, not only for information
> not available elsewhere, but also for physical equipment and software which
> is obviously no longer made or supported by the manufacturer.
Even if everyone could agree on this it would last for about 1 week and
then go back to status quo. I really don't mind the ads. They are not
excessive, they are reaching a good market where there is a win-win (the
seller gets some money and space back and the buyer gets first crack at
cool stuff), and they are more on topic than the drivel that has been
plaguing us for the last four weeks or so.
Sam Alternate e-mail:
dastar(a)siconic.com
-------------------------------------------------------------------------------
Don't blame me...I voted for Satan.
Coming in September...Vintage Computer Festival 2.0
See http://www.siconic.com/vcf for details!
[Last web page update: 04/08/98]
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From: Sam Ismail <dastar(a)wco.com>
To: "Discussion re-collecting of classic computers"
<classiccmp(a)u.washington.edu>
Subject: Re: Re.: How about a weekly FS/T list? (was Sale postings to
Classiccmp)
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Scanning today''s messages gave me an idea. I don't know if this has
been discussed before, but I don't remember it being discussed.
It's sometimes hard to follow the list with all of the quoted-replies;
maybe tracking deep-threaded messages is just not my strong suit :-)
Anyway, as part of my Microsoft beta testing, I belong to a small group
of "elite" testers. Called ClubWin!, we have a private administrative
newsgroup that requires a login name and password. Having a ClassicCmp
newsgroup would provide a threaded conversation capability. We could also
hang an e-mail gateway off of the news server to provide e-mail messages for
those who can't or want to use a newsgroup.
Rich Cini/WUGNET
<nospam_rcini(a)msn.com> (remove nospam_ to use)
ClubWin! Charter Member (6)
MCP Windows 95/Windows Networking
============================================
Sam Ismail <dastar(a)wco.com> wrote:
>Very true. You euro-doods could make a killing on us stupid Americans if
>you started auctioning off easy to find Sinclairs, Orics and Thompsons on
>Ebay. The only obstacle to overcome would be shipping, but I'm sure a
>little creative direct advertising towards us could overcome that concern.
So what does it cost to send a standard shipping container from London
to San Francisco on a slow boat? With a container a month, you could
stock an esoteric used computer store, bi-directionally.
- John
Jefferson Computer Museum <http://www.threedee.com/jcm>
Ten-plus years ago, I was given an opportunity to scrap a Burroughs
machine of some kind. I don't think it was still running, and it
was the size of a small refrigerator. I pulled the interesting
chips and disassembled the open-air hard disk unit. It was covered in
a clear sheet plastic frame, sealed with snaps or Velcro, and
the 14" platters spun in the air like a turntable. I still have
the two platters on the wall.
- John
Jefferson Computer Museum <http://www.threedee.com/jcm>
In a message dated 98-04-10 02:14:22 EDT, you write:
<< At 06:29 PM 4/8/98 -0400, you wrote:
>> That might depend on whether you're selling or buying, Kai :-).
A *very* valid comment.
>> More seriously, has anyone here actually conducted a transaction
>> through Ebay? Did the highest bidder actually make payment in
>> a timely manner, if you were selling? >>
just had a friend of mine email me to tell me he saw a mac128 go for $330 on
ebay. idiots overbid themselves. ebay is a good indicator of old computer
prices? i think not!
On 1998-04-08 classiccmp(a)u.washington.edu said to lisard(a)zetnet.co.uk
:You might if you had been had by someone in this list. If the man
:is a con, I think I am doing a public service here trying to stop
:him to strike again with somebody else.
the email below was private. why did you post a public response? that is
a breach of netiquette - which makes you look every bit as clueless as
cord intimated.
we'll ring you to complain in future.
everyone else: apologies, but we felt we should point this out.
:enrico
:lisard@zetnet.co.uk wrote:
:> On 1998-04-07 classiccmp(a)u.washington.edu said to lisard@zetnet.
:>co.uk :Warning! You might get something different from what
:>you have :bidded for. I did.
:> keep your bitching private. nobody else gives a toss.
:> --
:> Communa (together) we remember... we'll see you
:>falling you know soft spoken changes nothing to sing
:within her...
:--
:========================================================
:Enrico Tedeschi, 54 Easthill Drive, Brighton BN41 2FD, UK
:Tel/fax(+01273) 701650 (24 hours) and 0498 692465 (mobile)
:please visit my website at: <http://www.brighton-uk.com>
:========================================================
--
Communa (together) we remember... we'll see you falling
you know soft spoken changes nothing to sing within her...
At 06:29 PM 4/8/98 -0400, you wrote:
>> That might depend on whether you're selling or buying, Kai :-).
A *very* valid comment.
>> More seriously, has anyone here actually conducted a transaction
>> through Ebay? Did the highest bidder actually make payment in
>> a timely manner, if you were selling?
I have both bought and sold (mostly bought, though) through eBay. Mostly
Classic Computers, Donald Duck stuff, and Miniature Land Rovers. Had one
problem once, when the guy ignored me for a while, then eventually claimed
to have previously sold the stuff I bid on. Never had a problem with a
payment.
Generally, stuff is well packaged, though one time, I bought a TI99/4A in
the original box, and it arrived -- in the original box, covered with duct
tape. I was heartbroken. I explained to the guy that I had been
interested in the box as much as the computer, and he offered to refund my
money. (I didn't take him up on the offer, just wanted to prevent it from
happening to someone else.)
For comparison, I once ordered a Donald Duck nutcracker (new) from the
Disney catalog. The 6"x6"x12" nutcracker box came in a 2'x1'x3' box, with
a few sheets of tissue paper, neatly folded on the bottom of the box. I
was *not* happy.
The feedback system on ebay seems to work pretty well, I think. I feel
pretty comfortable buying and selling there.
--------------------------------------------------------------------- O-
Uncle Roger "There is pleasure pure in being mad
roger(a)sinasohn.com that none but madmen know."
Roger Louis Sinasohn & Associates
San Francisco, California http://www.sinasohn.com/
Ive had this posted in the past but these are really getting in my way:
*Tektronix 7612D programmable digitizer (scope w/o a screen) with two
7A16A plugins. No manuals or cables but it appears to be in terrific
shape otherwise. $150 plus shipping or will consider trades.
*Kontron KLA64 64 channel logic analyser - 2 complete units, cables,
manuals, covers, software, etc. They also have an optional unit
installed internally. Includes Axiom video printer. All items go as a
package - $325 plus shipping. Sorry no trades and will not separate.
Total weight about 160 lbs for everything.
Can email detailed info to those interested. I bought these in an
auction lot and the above pricing is what I have into them. I bought the
auction lot to primarily obtain a digital oscilloscope for my shop but
the above items are R&D oriented and realy have no use in my repair
shop. Both are still supported by repair, calibration and parts outfits
as well as the manufacturers. I have sources for the manual for the Tek
7612D and plugins as well so you don't need to be concerrned that you'll
not be able to work it without a manual. The manuals for the Kontrons is
very detailed and is from setup and use to parts and adjustment.
I'm trying to be as discrete as possible about posting these and I'm
sure some people are tired of seeing it come back up but there are new
people to the list that may not know of them and possibly be interested.
Please reply direct to me, not to the list.
--------------------------------------------------------------------
Russ Blakeman
RB Custom Services / Rt. 1 Box 62E / Harned, KY USA 40144
Phone: (502) 756-1749 Data/Fax:(502) 756-6991
Email: rhblake(a)bbtel.com or rhblake(a)bigfoot.com
Website: http://members.tripod.com/~RHBLAKE/
ICQ # 1714857
* Parts/Service/Upgrades and more for MOST Computers*
--------------------------------------------------------------------
< Cool. I have one of these (a uVAX2000) but the harddrive is going on i
<(I think something is loose inside and rattling around).
Maybe the power cord to the disk?
<> They can take RX33(1.2mb)
<> floppy and or any MFM drive like RD31(20mb st225), RD32(40mb st251),
<> RD52(quantum D540 31mb), RD53 (micropolus1325 71mb) or RD54(maxtor 2990
<> 159mb).
<
< I have seveal MFM drives here, but what are the Seagate equivilents to
<RD line? I have an ST-4051, ST-251, ST-277r-1, ST-4038 and one unknown o
<(made by Mitsubishi, has at least 4 heads and 904 cylinders and the only
<marking I see is TKS 56704).
The st251 is an rd32. The rest I don't know.
It can format drives too! the command is test70.
< Finding information about the Seagates isn't hard (as Seagate has all t
<information on their web site) but I'm curious as to the equivilents to t
<RD line.
I listed the rd#, the maufacturer and the model.
< Do you know offhand if that comes with a development system (say, a C
<compiler? Or even just headers?)
VMS is fairly loaded, editors, MACRO32, BASIC, DCL(the command line
language is as complex as some of the 8bit basics!), various language
libraries (C, Fortran, Macro). DECwindows is part of the OS as is
DECnet. Also DECwindows server, latserver and software to manage
the system, accounts, networks.
VMS as supplied is a complete working OS and environment and anything but
minimal in the pieces supplied. I've done entire network projects using
nothing but DCL scripts!
The first software to download for VMS is CMUip (I think the cdrom has it)
so that IP connections can managed). I'm sure there are suitable C
compilers in the free/shareware domain.
Most people have little knowledge of what VMS is. It's a multiuser,
multitasking OS designed for robust applications with high security.
What isn't mentioned is it's also a user enviornment, development
system and a aplications platform all rolled into one. It also has
the advantage of 20 years of development history with V7.1 being current
but any version between 5.4 and 6.1 covered under the hobby license. I
run 5.4 and 5.5 as it's as good as any and they are all good.
An advantage for the non unix user is DCL is like DOS command lines to
the user and most of the basic facilities are similar though richer
featured.
Allison
In a message dated 4/8/98 9:48:53 PM Eastern Daylight Time, marvin(a)rain.org
writes:
<< Joe wrote:
> The one thing that does piss me off is when people sell stuff on one of
> the high cost services like E-bay but place ads for it here. But I must
> admit that I've done it too.
I would disagree with this as part of the continuing education in any
collectable field is having some idea of what the market value is, and ebay
certainly provides some guidance in that regard! >>
Well, i'd be willing to argue that. i dont think i would consider ebay to set
current market prices for anything. i have a friend who uses it, and he said
it's great for the seller if one is selling anything quasi-rare or semi-
unusual as the manic bidders want to outdo themselves and drive the prices way
up. he said i should sell my apple //c lcd screen on ebay as he said one went
for almost $400. besides, i have seen prices there fluctuate wildly anyway.
david
> I'd like to find (or build) CP/M for my only S-100 box (you know, the one
> with the Ithaca Audio CPU card). I have a BASIC boot disk for the
> machine, and I believe I can read/write the 5.25" floppy from my PC
> (via 22disk), but I have no idea what's involved in finding or building a
> CBIOS for this box and where the boot sector on the floppy is.
The documentation for CP/M 2.2 is online at the unofficial CP/M web site.
See http://cdl.uta.edu/cpm/download/manuals/cpm22/index.html. You are
interested in Chapter 6 and most of the appendices.
Roger Ivie
ivie(a)cc.usu.edu
At 07:40 PM 4/9/98 -0500, you wrote:
>
>WIREHEAD'S CRAZY THOUGHT FOR THE DAY
>
>Using old 386 and 486 computers and their parallel ports to replace
>missing peripherals from true retrocomputing systems. Hmmm...
>
>I wonder if a 386, for example, with a properly programmed parallel port
>could emulate...say...a disk drive with a particular interface that you
>can't find anymore.
>
>Interesting thought?
>
>Anthony Clifton - Wirehead
I'd bet you could do it pretty easily with a bare-bones Linux install (why
compile any more than you need to?). In that case you'd have access to
oodles and oodles of working source code for examples.
I'm still dreaming about xfacing an old IBM punched card reader with a PC
running Linux. If I can ever find one that's working and for which I can
scrounge CE docs.
--
David Wollmann |
dwollmann(a)ibmhelp.com | Support for legacy IBM products.
DST ibmhelp.com Technical Support | Data, document and file conversion for IBM
http://www.ibmhelp.com/ | legacy file and media formats.
\
<(MicroVAX 2000). They are not CPU upgradable, but you can add expansion
<memory out to 16MB, an 8 port async serial board (thats the big DB
They max out at 14mb due to hardware mapping. As little as 4 meg is very
useable and 8mb or more makes a fine system.
<connector that doesn't go anywhere) and a sync serial port. Standard
The DB25 is a coms port with handshaking and modem controls.
Allison
