WTB: Thinkpad 700c math coprocessor

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Khipata
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WTB: Thinkpad 700c math coprocessor

#1 Post by Khipata » Mon Jun 23, 2014 9:36 pm

Hi everyone!

I would like to buy math coprocessor for Thinkpad 700c. Please, reply if anyone has them for sale. Thanks in advance!
5140,L40SX(3),PS/NOTE 425(2),PS/2 NOTE,700T,730T,700,700C(3),720C,701C(3),701CS(3),360P,360PE,750P,380,385,PC110,TRANSNOTE, Z50,240,240X,600,600E,600X(2),A31P,750C,755C,770,X40,X60,X61S,X61T,R50,R51E,R61I,T20,T21,T30,T42(2),T43,T60,T61(4),T500(2),W520,HP95LX,100LX,200LX,300,PSION II,3,NEWTON130
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TuuS
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Re: WTB: Thinkpad 700c math coprocessor

#2 Post by TuuS » Tue Jun 24, 2014 11:57 am

I believe the 486 slc 25mhz cpu uses a 387sx FPU. I probably have one, either the Intel or the Cyrix version but I doubt I'd be able to find it any time soon.

A photograph of the socket would be helpful to help identify what chip you need.

Good luck
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Khipata
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Re: WTB: Thinkpad 700c math coprocessor

#3 Post by Khipata » Tue Jun 24, 2014 1:12 pm

Thanks for the reply!

It is 387SL but as far as I know, 387SX will work too.

http://www.pc-atrium.de/html/koprozessorenintel.html

It is last but third image.
5140,L40SX(3),PS/NOTE 425(2),PS/2 NOTE,700T,730T,700,700C(3),720C,701C(3),701CS(3),360P,360PE,750P,380,385,PC110,TRANSNOTE, Z50,240,240X,600,600E,600X(2),A31P,750C,755C,770,X40,X60,X61S,X61T,R50,R51E,R61I,T20,T21,T30,T42(2),T43,T60,T61(4),T500(2),W520,HP95LX,100LX,200LX,300,PSION II,3,NEWTON130
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jflores
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Re: WTB: Thinkpad 700c math coprocessor

#4 Post by jflores » Thu Jul 31, 2014 5:42 am

Hello,

I have a math coprocessor in my old faithful Thinkpad 720C back from 1993 :)
I bought it because I needed to run a math coprocessor-intensive software (I think it was AutoCAD)

It was not an Intel version however, I think those were either horrendously expensive or unavailable anywhere at that time.
It is an IIT 3C87SX-33 - and it is available, it has been quiiite some time I don't run anything math-intensive on my 720C :)

Here is a link to the picture I took a couple of minutes ago :
https://www.dropbox.com/s/csbalkae2ugxptp/IMG_1402.JPG

I might add it does run on a 700C, it was originally in my own 700C before being transplanted on the 720C that replaced it
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Khipata
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Re: WTB: Thinkpad 700c math coprocessor

#5 Post by Khipata » Sun Aug 03, 2014 12:59 am

Thanks for your response! :)

Would you sell your 700c and/or 720c ?

Please, let me know.

Thanks in advance!
5140,L40SX(3),PS/NOTE 425(2),PS/2 NOTE,700T,730T,700,700C(3),720C,701C(3),701CS(3),360P,360PE,750P,380,385,PC110,TRANSNOTE, Z50,240,240X,600,600E,600X(2),A31P,750C,755C,770,X40,X60,X61S,X61T,R50,R51E,R61I,T20,T21,T30,T42(2),T43,T60,T61(4),T500(2),W520,HP95LX,100LX,200LX,300,PSION II,3,NEWTON130
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