classiccmp(a)u.washington.edu
Subj: Re: Re[4]: Development, round II
Barry Peterson wrote:
>On Fri, 30 Jan 1998 19:41:15 -0600, you said:
>
>>
>>IIRC they started officially calling it Warp with V2.0, the first =
>release following the Microsoft/IBM breakup.
>
>I have a copy of 2.0; it is not called Warp. That started with version
>3.
The story that I read somewhere was that "Warp" was used internally at IBM.
With version 3.0 they were explicit about it and put that name on the box.
Peter Prymmer
,
At 08:06 PM 1/30/98 -0800, you wrote:
>Maybe not in this day and age. Who knows what wacky contraption some whiz
>will invent in the future which will allow just such a thing? (Perhaps it
>will be somebody among us here for just the purposes of restoring classic
>computers in the year 2050).
I can see someone developing good enough VR that you'd be able to scan in
about 20 different pics of a dead pc inside and out, throw some emulator
code in the fray, and you'd be able to go under the goggles and actually
use the system in VR.
(It never would be the same as actually being there (at least not for a few
years) but wouldn't it save a whole lot of physical storage space!)
-John Higginbotham-
-limbo.netpath.net-
At 11:43 PM 1/30/98 GMT, Barry Peterson wrote:
>On Fri, 30 Jan 1998 17:17:51 -0500, you said:
>
>>Barry Peterson wrote:
>>>
>>> I sold a drive (IIRC, a micropolis 85MB) that would spool up and then
>>> do a couple of "ching-chings" and worked fine. I tested the livin'
>>> daylights out of it; no problems, but many folks told me and the
>>> fellow I sold it to that it would die immediately.
>>
>>So how long has the guy you sold it to been using it? (I've had bad
>>luck with the Micropolis 40MB drives in some AT&T 3B1s).
>
>I had it for >3 years, he had it for two more, now his grandson has
>it... So far, so good.
>_______________
The Micropolis I stuck in my AT&T has been dropped twice and
actually caught on fire once! Still works too... Believe it or not,
chkdsk and scandisk both give it the 100% ok.
Les
<The PIC is a lot older than most people think - I seem to recall that the
<16C54 was first produced by GI (before they became Microchip) in about
<1979. Of course there have been many new devices since then.
Earlier and it was the cp1600 series (I think '77). GI was heavy in the
embedded market then and used in the intellivison game to name one. I
knew of them as they were down the block from me when I lived on LI(NY).
Allison
<Similar, but not the same. Most copies are 'illuminate for white', most
<laserprinters are 'illuminate for black'. This means the corona wires are
<at different voltages, amongst other things.
Not as much as your expect. I worked with both the 3300 copier and the
printer version (XP12/24) and same for the Ricoh 1040(40ppm). It was
coincidence we had both in the group so copier repair was a common
task and not in my basic training. ;)
<Also, the scanning in a photocopier is entirely mechanical, and is (in
<general) synchronised mechanically. Laser printers have a lot of
<electronic sync stuff, things like the laser beam detect sensor, the
<registration shutter, etc.
Like I said different optics.
<Still, understanding a copier is a good starting point for understanding
<a laser printer. Just expect there to be a lot of changes.
The packaging of of the optical system is where the differece are
significant but a basic understanding of electrophotography is in order
and the xerox texts does cover reverse printing (uses reversed relative
electrostatic bias). FYI: when training the trainer I stopped a smart
ass FSE cold by tweeking the bias so everything was reversed. Took him
4 hours to swap everthing and not fix it.
Allison
Actually, the 486 had different things that made it different from the 386.
There's the math-co-processor (DX only), the .8 micron design, (on DX/2 50
and above only), as well as a built in floating point. There's also the ZIF
socket on MOST (but not all) 486 motheboards, as companies were using their
own designs, some with integrated chip, others with this and that, etc.
Tim D. Hotze
-----Original Message-----
From: jpero(a)cgo.wave.ca <jpero(a)cgo.wave.ca>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Saturday, January 31, 1998 5:34 AM
Subject: Re: 486 vs 386 (was Development, round II)
>
> >And you'll have to pardon my ignorance of the Intel parts after the 8085,
> >but why wouldn't a 386 work if the 486 works? (Other than the speed
> >difference.) It has always been my impression that few OS's/applications
> >need whatever extra software features that differentiate the 486 from the
> 386.
>
>
> I believe the 486 was supposed to be just a 386 with a built-in math
> co-processor. Then Intel came out with the 486SX. Which was really just a
> broken DX, a 486 in which the built-in math co-processor didn't work.
>
> -- Kirk
Not very much difference but 486 is really ahead in getting more of
performance usually runs at least 1 cycle per instruction.
The 386dx excutes instuctions all over the map between 5 and 15
(guessing). Example: 386dx/387 33mhz bit slower than 486dx 25.
Remembering from years gone by in clone/brands world...
First, before I'm done, for clock to clock cycles, 286 and 386 is no
better at excuting instructions most of time usually but buyer opted
for XT's and 286's because Intel was asking Too Much for 386, the
387 chip actually cost 2k at that time. This is why 386 is
sooo late becoming popular when win 3.1 came out. At that time, in
late 91s loads of users were still on XTs and we upgraded them to
either 286 boards (286/20mhz PcMate yuk!) and once in awhile series
of 386sx or rare 386dx for other upgrades. Within short time later
about half a year boatloads of 386dx 33/40 and few 386sx thrown in
now and then were sold for either pc and upgrades when the price is
Right Thing.
After 93-94ish, things lost their luste n' fun then became very
common thing. (yawn) while we sold long series of 486 machines
then P5 ever since. I have NOT remembered how CHEAP, useful real
and good pc anywhere or when til now. 1~2k CDN gets you *VERY*
decent complete P5 or PII machine with 14" color monitor now. I'm
kicking PS/1 original 2011 because it has no hd and too little ram
and it did sport 1k price tag but!
That old days is very interesting time indeed!
Jason D.
email: jpero(a)cgo.wave.ca
Pero, Jason D.
At 08:27 PM 1/30/98, you wrote:
>portable and an EPROM eraser for $100. I bought another new that
>interfaces to a printer port for $25 at a hamfest.
Hey, I'm going to the Charlotte, NC Hamfest in March. Maybe I'll pick one
up then.
-John Higginbotham-
-limbo.netpath.net-
At 02:08 PM 1/30/98 -0800, you wrote:
>If you want to build your own, find the 4-volume set of _Ciarcia's Circuit
>Cellar_ (or find the corresponding late-70's issue of _BYTE_) and look
>at some of his designs.
Heck, if I could do all that, I wouldn't be asking about them. :) I never
got into electronics too much, just one class in high school, and I have
big clumsy hands when it comes to soldering irons.
But thanks to everyone for providing information on this subject. Who
knows? Maybe once I get a programmer, I'll start burning my hands again. :)
-John Higginbotham-
-limbo.netpath.net-
IIRC they started officially calling it Warp with V2.0, the first release following the Microsoft/IBM breakup.
Bob
----------
From: Kip Crosby[SMTP:engine@chac.org]
Sent: Friday, January 30, 1998 10:40 AM
To: Discussion re-collecting of classic computers
Subject: Re: Re[4]: Development, round II
At 12:34 1/30/98 GMT, you wrote:
>BTW What is Warp? Is it the OS/2 windowing system? If so, why would I
>want to use it at all, let alone on a 286? ;-)
Warp is OS/2v3. You couldn't use it on a 286, but if you had, say, a
486/33 -- do pardon me for mentioning a nine-year-old part -- it would
begin to be worth playing with. My copy of Warp is still very much to
hand, and I think anyone who can scrounge up an appropriate computer should
run it (for a while) if they have the opportunity, because it's a real
education.
____________________________________________________________
Kip Crosby, honcho, mechanic and sole proprietor, Kip's Garage
http://www.kipsgarage.com: rumors, tech tips and philosophy for the trenches
Coming Spring '98: The Windows 98 Bible by Kip Crosby and Fred Davis!
<There are _very_ few good books on laser printers - and the manufacturers
<do NOT supply decent technical manual in my experience. I found a book at
<a charity shop (thrift store?) called 'Electrophotography' that gives a
Copiers are the same technology save for the imaging systems. I should
know I had an engineering finger in every laser printer with a DEC label
starting with the LN01 (Xerox XP12) through the 2250 series and my
specialty was the over 8PPM Ricoh engines.
Allison
