!From: John Ruschmeyer [mailto:jruschme@Mac.com]
!
!> From: David Woyciesjes <DAW(a)yalepress3.unipress.yale.edu>
!> Date: Mon, 8 Oct 2001 16:49:55 -0400
!>
!> I have a Unisys 486 computer. It's a SX-25, with a DX-50 in it also.
!> It's mfg date is 10/92, and style number is SG-3102-425.
!>t's "plateau" is
!> labelled Evaluation Unit A. That would explain the XXXX in the FCC ID
!> field...
!> On the motherboard itself, it has a sticker with...
!> 43611896-000
!> PW300 486SX/25
!> 9240 AVEX
!
!Sounds like a 486SX/25 system upgraded to a DX2/50 with an
!OverDrive chip.
Close. But they are both regular 486 processors. 486SX/25 & 486DX2/50
!> ...while near the 30-pin memory, printed on the board is...
!> UNISYS
!> PW2 300/486
!> PWBA 43188028-000
!>
!> Does anyone know where I can find out what the jumpers do on
!> this board? Or other specs for it? I though I heard someone
!> mention dual processor WRT this board, but I doubt it. There
!> is also a smaller LIF socket next to the 2 LIF
!> processor sockets. IIRC, that is for a 487 math co-processor...
!
!I doubt that its for a 487... I almost wonder if this was some kind of
!386/486 board.
Well, it's a 15x15 pin socket, similar to the 17x17 socket for the 486
processors... If only I had the docs... I'd like to find out how fast I can
push this board...
--- David A Woyciesjes
--- C & IS Support Specialist
--- Yale University Press
--- mailto:david.woyciesjes@yale.edu
--- (203) 432-0953
--- ICQ # - 905818
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Close. But they are both regular 486 processors.
486SX/25 & 486DX2/50
Makes sense since the DX2 was internally clock doubled but
used the same external 25mhz clock as the DX and SX chips, the SX
being the same with the exception of having the math-coprocessor
section disabled.
Jeff
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