🚀 go-pugleaf

In article <traymund.676153534@uiwpl.ece.uiuc.edu>, traymund@uiuc.edu (Tim Raymund) writes:
> I've been looking at those giant adds in the trade journals for the
> DECpc 433 Workstation, and I've got a few questions.
> What's special about the 486DX?  Is it different from a plain 486?
> Is a coprocessor an option?  What's the performance like?  MFLOP?  MIPS?
> SPEC?

The 486 is a full 32 bit microprocessor based on the 386 architecture (with
some minor additions) but running about 2-3 times faster at the same clock
speed.  A floating point unit is included, but some PC manufacturers
allow for a Weitek co-processor for slightly more performance.  There
are two flavours of 486 - 486 and 486SX, the SX model has the floating
point co-processor disabled and currently runs at 20MHz (the minimum speed
of the 486 is 25MHz).  The DX name comes from the 386, which had a DX
(full 32 bit bus) and SX model (16 bit bus).  Note both 486 models are
full 32 bit.  The only performance figures I have are that the 486
is rated about 8-10 mips, and the 486SX is about 10% faster than a
33MHz 386.  The figures don't say much!

> Will it conform to ACE standards?  Is it upgradable to a MIPS chip?

The ACE standard includes specifications for Intel and MIPS microprocessors.
I don't think they are supposed to be interchangeable.

> What's the internal bus?  EISA?  Is it accessible?

The expansion bus is EISA, with about 7 slots?

That's all I know...

Dr Mark Kosten,        phone: +61 3 479-2767
Computer Centre,       AARNet (internet): ccmk@lure.latrobe.edu.au
La Trobe University,   X.25 (PSI): 05052347300000::ccmk
Bundoora, 3083
Australia