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Marcin
Joined: 02 Jan 2005
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Location: Poland
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 Posted: Tue Oct 10, 2006 2:22 pm Post subject: |
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| Elar wrote: | | Why? It's clock doubled and runs at 33MHz external clock. |
What was reason to doubled clock ?
EDIT : You mean it should work with 386 DX 33 MHz ?
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vinicio
Joined: 15 Feb 2003
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Location: Italy - Tuscany
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| Posted: Tue Oct 10, 2006 6:26 pm Post subject: |
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Perhaps, I expressed badly in my previous post.
Like for IIT 487DLX25/50 (Clock doubled version of the IIT-3C87) this Math-Co DX-2, can be used with any CPU 386. The important is have a mainboard that it allows asynchronous job between CPU and FPU. The last generations 386 mainboard have the possibility to have a faster FPU of the CPU. 
Someone has ever tried IIT 487DLX25/50 ?
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CPUbar
Joined: 07 Feb 2006
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| Posted: Tue Oct 10, 2006 11:29 pm Post subject: |
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I think this FPU work with Cyirx 486DRX2 33/66 GP.
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CPUbar
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| Posted: Tue Oct 10, 2006 11:33 pm Post subject: |
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I think this FPU work with Cyirx 486DRX2 33/66 GP.
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Marcin
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CPUbar
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| Posted: Wed Oct 11, 2006 12:57 am Post subject: |
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I forgot too first!!! LooooooooL 
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vinicio
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| Posted: Wed Oct 11, 2006 6:15 am Post subject: |
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I don't believe, USLI produce a FPU that works with a single model of CPU. What politics of production would it be?
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debs3759
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| Posted: Wed Oct 11, 2006 7:28 am Post subject: |
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There are other clock doubled 486 upgrades with 386 pin-out. The TI 486SXL2 and SXLC2 are two that spring to mind without looking on any site for inof...
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CPUbar
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| Posted: Wed Oct 11, 2006 7:51 am Post subject: |
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| vinicio wrote: | | I don't believe, USLI produce a FPU that works with a single model of CPU. What politics of production would it be? |
That is why this FPU so rare.
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vinicio
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| Posted: Wed Oct 11, 2006 7:55 am Post subject: |
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I say only that works with all 386. Is possible in the same system 386 two different speeds for CPU and FPU. 
Naturally if together to a cpu x2 (Synchronous job) the performances of the system are taller. 
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vinicio
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| Posted: Wed Oct 11, 2006 7:58 am Post subject: |
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| CPUbar wrote: | | vinicio wrote: | | I don't believe, USLI produce a FPU that works with a single model of CPU. What politics of production would it be? |
That is why this FPU so rare. |
it is rare because the fastest.
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![[ Hidden ]](https://cdn.cpu-world.com/forum/templates/CPUWorld/images/lang_english/icon_email.gif "[ Hidden ]"){kind=icon}
exactly ! I forgot about that CPU