Re: Fast modems and the SSC

[David.Empson@bbs.actrix.gen.nz]

In article <84168@ut-emx.uucp> foegelle@ccwf.cc.utexas.edu (Michael Foegelle) writes:
>
> Be careful with your descriptions.  The 65C51A works as you describe, but the
> 65C51 works identically to the 6551 in terms of CTS.  At least that's the way
> the GE/Harris/RCA version works.  I believe there's also a 6551A available 
> which may solve the problem as well.

Ah, sorry.  I should have mentioned I was talking about the Rockwell
versions (R6551 and R65C51) which is what I had experience with at work.

Rockwell don't have a '6551A' or '65C51A', but from your description
it seems that their R65C51 is equivalent to the 65C51A.

We eventually ditched the 6551 and 65C51 due to their stupid flow
control handling, and now use the Motorola MC2681 DUART (very similar
to the MC68681) and the Zilog Z85130 ESCC (Enhanced version of the
IIgs and Mac's SCC).
-- 
David Empson

Internet: David.Empson@bbs.actrix.gen.nz    EMPSON_D@kosmos.wcc.govt.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand