Subject: Re: High serial port (output) speeds
To: der Mouse <mouse@Rodents.Montreal.QC.CA>
From: Bill Studenmund <>
List: port-sparc
Date: 10/23/1999 19:03:40
On Sat, 23 Oct 1999, der Mouse wrote:

> > I remember Jonathan experimented once with running sone pmax
> > workstations in 1x mode.  It just didn't work reliably in his
> > experience.  I'm afraid the same'd happen here.
> Do the pmax boxen also use 8530s?  If so, which ones?  Someone quoted a
> Zilog data sheet...but I just now opened up an IPX, and it (at least
> this particular one) uses AMD chips, not Zilog chips.  They may be

From everything I've seen, they are bug-compatable. AMD was a second
source for these parts. :-)

> bug-for-bug compatible, but they also may not; if I built a chip with
> the interface of the 8530 but with more accurate mid-bit sampling and
> synchronization (see an upcoming message for how this could be done), I
> wouldn't hesitate to call it an 8530.  For all I know, not having seen
> the spec sheets, AMD did.

I really doubt it. Changing things around like that makes you not be a
second source. :-)

Take care,