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echo: tech
to: Jim Holsonback
from: Wayne Chirnside
date: 2003-02-06 21:20:00
subject: Re: CMOS battery

-=> JIM HOLSONBACK wrote to WAYNE CHIRNSIDE <=-

 WC> and purchase a 56K hardware external modem as well.
 
 WC> A project scheduled for way down the road is to attempt to
 WC> remove the fast UART from the crapped out 486 and replace the 8250
 WC> UART in it but that is stretching my current abilities, something
 WC> a few years ago I'd have tackled in a heartbeat.

 JH> You say your 486 had a fast UART and the Pentium only has an 8250?  I'm
 JH> surprised.  I think before I tried doing a UART chip-swap (if I could
 JH> even _find_ a separate UART chip), I'd consider looking for a serial
 JH> card with 16550 UART(s), and disabling the mainboard Serial ports.  In
 JH> any event, if what the Pentium board has is only 8250 or
 JH> compatible/emulated, I think no need to hurry to buy an external 56K
 JH> serial modem, as TBOMK the 8250 won't support that speed.  Corrections
 JH> welcomed, if I'm wrong.

I was thinking about reviving the old 486 with the fast UART from 
another board. The Pentium as you'd expect has HS  UART's.
First on my list of things to do is familiarize myself
with 72 pin EDO memory and snag some from Ebay. 
 
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