Jay Kulpinski wrote:
>
> Steve Chandler wrote:
> >
> > I think he means FPU in which case it wouldn't be a problem. SX means no
> > FPU but I'm not sure what the "F" indicates.
> >
> > Steve Chandler
> > Seiko Communications Systems, Inc.
> >
>
> He means both MMU and FPU.
> See http://www.national.com/pf/NS/NS486SXF.html
>
> "The NS486SXF processor provides the same programming model and
> register set as the standard '486 except that real mode, virtual
> memory, and floating point support have been eliminated."
The NS486SXF only provides a flat 32 bit memory space. No virtual
8086, no paging, no real mode, no 16-bit segments. Not recommended
for Linux.
I chose the ST Microelectronics 'STPC' for our embedded controller.
This has a 486DX style core with floating point and MMU, plus all of
the integrated peripherals, like PCI bus, VGA (super VGA) video,
dram bus, ISA bus, etc. You can find data at:
http://www.st.com
Hope this helps,
-Corwin
