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View Full Version : For Sale Intel 287XL - more pieces



MIRKOSOFT
11th December 2016, 01:11
Hi!

I have for sale Intel 287XL co-processors for 15 EUR/1 piece.
When you will buying more pieces, shipping costs are minimal or free.

Contact me via PM.

Miro

115575115576

zinamo
11th December 2016, 18:15
Interested, PM follows

zinamo
12th December 2016, 20:05
Payment sent

MIRKOSOFT
8th January 2018, 16:03
Still lot of co-processors for sale.
Miro

BlindGerMan
8th January 2018, 16:38
Tested as working?

Well interested in two for my bridgeboards...

MIRKOSOFT
8th January 2018, 16:46
Yes, brand new

BlindGerMan
8th January 2018, 18:08
So interested in two of them...

SaviorX
8th January 2018, 18:44
found this tidbit interesting...

"The 80287 (i287) is the math coprocessor (https://en.wikipedia.org/wiki/Coprocessor) for the Intel 80286 (https://en.wikipedia.org/wiki/Intel_80286) series of microprocessors (https://en.wikipedia.org/wiki/Microprocessor). Intel's models included variants with specified upper frequency limits ranging from 6 up to 12 MHz. Later followed the i80287XL with 387 microarchitecture and the i80287XLT, a special version intended for laptops, as well as other variants.
The 80287XL is actually an 80387SX with a 287 pinout. It contains an internal 3/2 multiplier so that motherboards which ran the coprocessor at 2/3 CPU speed could instead run the FPU at the same speed of the CPU. Other 287 models with 387-like performance are the Intel 80C287, built using CHMOS (https://en.wikipedia.org/wiki/CHMOS) III, and the AMD 80EC287 manufactured in AMD's CMOS (https://en.wikipedia.org/wiki/CMOS) process, using only fully static gates.
The 80287 and 80287XL work with the 80386 (https://en.wikipedia.org/wiki/80386) microprocessor, and were initially the only coprocessors available for the 80386 until the introduction of the 80387 in 1987. Finally, they were able to work with the Cyrix Cx486SLC (https://en.wikipedia.org/wiki/Cyrix_Cx486SLC). However, for both of these chips the 80387 is strongly preferred for its higher performance and the greater capability of its instruction set."

in case anyone is interested. (obviously a 386 board would need to have the appropriate socket)

Nem84
9th January 2018, 07:57
Interested in one. PM sent.

BlindGerMan
12th January 2018, 18:37
Payment done

rgrocha
13th January 2018, 09:14
Interested in 1.
Sending PM

Enviado desde mi SM-G850F mediante Tapatalk

rgrocha
13th January 2018, 11:03
Payment sent

mlc
13th January 2018, 16:12
Interested, PM sent.

kylix
13th January 2018, 22:04
Declaring interest in two.

quicknick
14th January 2018, 00:43
Interested in 1.

mlc
16th January 2018, 02:51
Money sent

debs3759
16th January 2018, 15:03
Interested in two if still available.

MIRKOSOFT
16th January 2018, 15:58
Yes, still available

debs3759
18th January 2018, 14:28
Payment sent for two

debs3759
7th February 2018, 08:28
I received my chips and have left feedback. Thank you.