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lovely Weitek:) white ceramic~~~

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hugo929



Joined: 27 Oct 2006
Posts: 6163
Location: China
PostPosted: Sat Mar 03, 2007 9:21 am    Post subject: lovely Weitek:) white ceramic~~~ Reply with quote
may it be a 286 FPU? thanks
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wepwawet



Joined: 18 Mar 2004
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Location: Seligenstadt - Germany
PostPosted: Sat Mar 03, 2007 2:35 pm    Post subject: Reply with quote
Whatever it is, it is nice!
Congratulations!
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hugo929



Joined: 27 Oct 2006
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PostPosted: Sun Mar 04, 2007 11:17 am    Post subject: Reply with quote
wepwawet wrote:
Whatever it is, it is nice!
Congratulations!

Thanks for feedback!
One could find more weitek1232 at http://www.cpu-cn.com/CN/Class.asp
So should i draw a conclusion it is a 286 FPU? Question Rolling Eyes
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wepwawet



Joined: 18 Mar 2004
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Location: Seligenstadt - Germany
PostPosted: Sun Mar 04, 2007 12:12 pm    Post subject: Reply with quote
What makes you think it is a 286 FPU?
All 80287 I know are DIP40 or PLCC44, no 68 pin layout.

The mentioned site above claims one LCC68 chip to be a 286 FPU but I don't see any reason for this. It is an FPU but a SPARC related.
http://cch.loria.fr/documentation/IEEE754/numerical_comp_guide/sparc.doc.html

And below there is one matching yours: a 1232LCA.
This shall be an arithmetic chip.
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popo



Joined: 18 Feb 2004
Posts: 520
Location: Formosa
PostPosted: Mon Mar 05, 2007 12:17 pm    Post subject: Reply with quote
hugo929 wrote:
So should i draw a conclusion it is a 286 FPU? Question Rolling Eyes


I don't think so, a Weitek designed 287 should be 1067, not 1232.
http://www.weitek.com/textual/products/cpu.html
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hugo929



Joined: 27 Oct 2006
Posts: 6163
Location: China
PostPosted: Tue Mar 06, 2007 10:42 am    Post subject: Reply with quote
popo wrote:
hugo929 wrote:
So should i draw a conclusion it is a 286 FPU? Question Rolling Eyes


I don't think so, a Weitek designed 287 should be 1067, not 1232.
http://www.weitek.com/textual/products/cpu.html

thanks for feedback~~~.
why i cant open that URL --http://www.weitek.com/textual/products/cpu.html
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CPUShack



Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
PostPosted: Tue Mar 06, 2007 12:11 pm    Post subject: Reply with quote
Processor brief
WTL 1064 math coprocessor, Motorola based
WTL 1067 math coprocessor, intel i286 based
WTL 1164
WTL 1165
WTL 1167 math coprocessor, intel i386 based
WTL 2048
WTL 2167 math coprocessor, intel i386 based
WTL 3164
WTL 3167 math coprocessor, intel i386 based
WTL 3170 math coprocessor, SPARCstation 1
WTL 3172 math coprocessor, SPARCstation IPC / SLC
WTL 4167 math coprocessor, intel i486 based
XL-3132 FPU processor, MIPS based
XL-8032 FPU processor, MIPS based
Weitek 4170 math coprocessor socket

WTL 8601 SPARC POWER µP
WTL 8701 SPARC POWER µP, internal bus speed doubled

Weitek 8200 RISC processor, based on HP PA-RISC
Weitek 8200, 7.25 MHz embedded processor (e.g. used for Apple LaserWriter Pro 810)
Weitek 8220, 16/20/25MHz RISC processor

Most Weitek chip versions do not support DOUBLE PRECISION computations.
Use of single precision computations with the xxx387 coprocessor is not successful.
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