8086 uP Require

[WayneL]

Hi

Could anyone help us find an old very early 8086 uP for our University's
SEM?
It is a very old unit be our Scanning Electron uScope will not operate
untill we find one.
I think the speed is either 1 or 4MHz. It is imprtant we get one of the
earliest version.

Thanks

WayneL

 

[Kryten]

Could anyone help us find an old very early 8086 uP
for our University's SEM?
It is a very old unit be our Scanning Electron uScope
will not operate until we find one.
I think the speed is either 1 or 4MHz. It is important we get one of the
earliest versions.

I would have thought all 8086 uP would work the same?

What package do you need it in? DIP40? PLCC44?

Would you make do with an 8086 that has been unplugged or unsoldered from an
old board?

 

[Pooh Bear]

Hi

Could anyone help us find an old very early 8086 uP for our University's
SEM?
It is a very old unit be our Scanning Electron uScope will not operate
untill we find one.
I think the speed is either 1 or 4MHz. It is imprtant we get one of the
earliest version.

Crikey ! I suppose I must have one somewhere from when I upgraded my Amstrad
PC1512's 8086 for an NEC V30 !

Why do you ( think you ) need an *early version* btw ?

How do you know it's the CPU that's broken ?

Graham

 

[Winfield Hill]

Kryten wrote...

What package do you need it in? DIP40? PLCC44?

PLCC? ROFLOLMAO.

 

[Kryten]

Kryten wrote...

PLCC? ROFLOLMAO.

I have some NMOS 80188 chips, in ceramic PGA and an odd flat ceramic
package.
I have an 80C188 in PLCC too. I can't recall if the 8088 came in anything
other than DIP40.

 

[Pooh Bear]

I have some NMOS 80188 chips, in ceramic PGA and an odd flat ceramic
package.
I have an 80C188 in PLCC too. I can't recall if the 8088 came in anything
other than DIP40.

I just checked an old Intel databook.

8086 was available in DIP40 only.

Graham

 

[Yukio YANO]

Hi

Could anyone help us find an old very early 8086 uP for our University's
SEM?
It is a very old unit be our Scanning Electron uScope will not operate
untill we find one.
I think the speed is either 1 or 4MHz. It is imprtant we get one of the
earliest version.

Thanks

WayneL

Phillips used 8086 in their ~ 1978-85 TEM, I forget what the model
number is ! I don't recall what they used in their 1980s SEM. I have
forgotten what was so special about the 8086/ Z80/ 8080/ 8085/ 8088. Gee
that was 25 years ago.

Yukio YANO

 

[Le Chaud Lapin]

Phillips used 8086 in their ~ 1978-85 TEM, I forget what the model
number is ! I don't recall what they used in their 1980s SEM. I have
forgotten what was so special about the 8086/ Z80/ 8080/ 8085/ 8088. Gee
that was 25 years ago.

IIRC, the 8086/8088 were among the first microprocessors to utilize
segmentation to reach a 1MB address space using what was actually a
16-bit CPU. Shift a 16-bit segment register left 4 bits, add 16-bit
offset, 1MB addressibility results. Every programmer in any language
on this CPU approached memory management with care. They knew that
there was actually a maximum of 640KBs available, because the remaining
360K on PC-compatibles was reserved for things like video frame buffers
and boot ROM. I think the difference between 8086 and 8088 was that
8086 had a true external 16-bit data bus, whereas 8088 had only 8 bit
bus with double-cycling. The initial, "standard" speed of 8088/6 was
4.77 MHz.

A lot has changed since then. Today, if you fire up Limewire on
Windows, you can see it (and the Java diaper that comes with it)
unapologetically consuming 60 megabytes of of RAM. The ubiquitous
Adobe Acrobat eats up 52 MB.


-Le Chaud Lapin-

 

[Winfield Hill]

Le Chaud Lapin wrote...

The ubiquitous Adobe Acrobat eats up 52 (megabytes of of RAM).

No, only 15MB in my machine right now. Mozilla is the big hog.

 

[WayneL]

Hi

Yes. An 8086 unplugged would be fine. The company that servies the SEM said
the uP is "stuffed" and they are stuggling to get hold of one.

How can we get hold of it/them?

We are based in the UK.

Cheers

WayneL

 

[Klaus Bahner]

Hi

Could anyone help us find an old very early 8086 uP for our University's
SEM?

That should not be too hard, try for example Strixner & Holzinger
(http://www.sh-halbleiter.de) They claim to have five different Intel
versions of the 8086 on stock in small quantities plus several second
source 8086's. So far I always got what their site showed within 14 days
or faster at reasonable prices - not cheap, but reasonable.

HTH
Klaus

 

[Pooh Bear]

Hi

Yes. An 8086 unplugged would be fine. The company that servies the SEM said
the uP is "stuffed" and they are stuggling to get hold of one.

I'd *love* to know how a uP gets *stuffed* by sitting in its socket !

Graham

 

[Michael A. Terrell]

Phillips used 8086 in their ~ 1978-85 TEM, I forget what the model
number is ! I don't recall what they used in their 1980s SEM. I have
forgotten what was so special about the 8086/ Z80/ 8080/ 8085/ 8088. Gee
that was 25 years ago.

Yukio YANO

The 8086 was the 16 bit data buss version of the 8088 used in the IBM
PC & XT computers. IBM used the 8088 because it only had an 8 bit data
buss.

The 8086 turns up on E-bay, and some electronic surplus places list
them from time to time. I might have one, but I would have to dig
through about 100 boxes of early computer boards to find one.

--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

[Tam/WB2TT]

. IBM used the 8088 because it only had an 8 bit data
buss.

The way I heard the story, IBM used the 8088 because they had an 8088 ICE
blue box.

Tam

 

[Kryten]

Yes. An 8086 unplugged would be fine.

How can we get hold of it/them?

We are based in the UK.

I have two Fujitsu 8086-2 (date code 8728) and one 8088-2 (date code 8719).

So where would you like me to post one 8086?

And what's it worth? :->


If anyone is interested in homebrew Z80 systems I have about ten each of Z80
CPU, CTC, SIO-0 and eighty 4164 chips.

 

[Kryten]

That should not be too hard, try for example Strixner & Holzinger
(http://www.sh-halbleiter.de) They claim to have five different Intel
versions of the 8086 on stock in small quantities plus several second
source 8086's. So far I always got what their site showed within 14 days
or faster at reasonable prices - not cheap, but reasonable.

I got no results searching for 8086 on their English language pages.
It only works on their German language pages.

They seem to be going for about 10 to 15 euros, say 6 to 10 UKP.

Wayne, try Google
http://www.google.co.uk/search?hl=en&q="8086-2"+MHz&meta=
First result was
http://www.angelfire.com/electronic2/index1/8086.html
also
http://www.unicornelectronics.com/IC/8000.html

 

[WayneL]

Hi


If you could send one to the university, give me you email (or send me an
email but remove the word -nospam from this
[email protected]) and I will contact you with the postal address?
We can give you a token amount which includes the postage, please let me
know in the email. I can pay by paypal.
Are you in the UK?

WayneL

 

[Rob B]

Hi

Could anyone help us find an old very early 8086 uP for our University's
SEM?
It is a very old unit be our Scanning Electron uScope will not operate
untill we find one.
I think the speed is either 1 or 4MHz. It is imprtant we get one of the
earliest version.

I knew if i kept that original '84 IBM PC it might be useful to someone or
worth something again one day now if i could get the original price for i
would be very happy

good luck fnding one if you exhaust your other sources then post back here
if my cpu will help you

 

[Michael A. Terrell]

The way I heard the story, IBM used the 8088 because they had an 8088 ICE
blue box.

Tam

I saw a lot of the same 8 bit cards used in some of their dedicated
word processing systems. The same video board, floppy controller,
printer port, monitor and even the original five slot "PC" case. The
"XT" was the same design, except they moved the slots closer together to
add the three additional slots. Do you remember the little metal plate
with a single screw covering a rectangular hole on the back of the PC
case? It was used in the word processing system. BTW, the word
processor used the 8085 & support chipset.

--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

[Rob B]

Crikey ! I suppose I must have one somewhere from when I upgraded my Amstrad
PC1512's 8086 for an NEC V30 !

Why do you ( think you ) need an *early version* btw ?

How do you know it's the CPU that's broken ?

Graham

Amstrad that was the cheaper knock off (competition) for IBM PC ?
NEC v30 now that takes me back ( i shutter)

i still have original IBM PC sitting in storage i used it for end table
support in office but now i have a DIGITAL DEC 3000 and an HP apollo
9000/735 end table