Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!apple!aux.support.apple.com!winders
From: winders@aux.support.apple.com (Scott Winders)
Newsgroups: comp.sys.mac.system
Subject: Re: IIfx Serial Switch cdev, System 7, flow control...
Message-ID: <52883@apple.Apple.COM>
Date: 15 May 91 02:33:23 GMT
References: <422@goblin.ntg.com>
Sender: nntp@Apple.COM
Organization: Apple Computer, Inc.
Lines: 31

In article <422@goblin.ntg.com> dplatt@ntg.com (Dave Platt) writes:

> So... for those folks who know (regarding the IIfx Serial Switch):
> 
> 1.  Just how has the functionality of this cdev been rolled into System
>     7?  Is there a serial-driver call that an application can use, which
>     means "Permit me to have direct access to the SCC"?
> 
> 2.  Has the problem with XOFF latency in "faster" mode been fixed in
>     System 7 Golden?  [It still exists in 7.0FC1]
> 
> 3.  If I continue to use my copy of this cdev to configure my IIfx in
>     "compatible" mode, will my SCC turn into a newt once I install System
>     7 Golden?

1. None of the functionality of the IIfx Serial Switch is part of
System 7. If you have a program that needs to write directly to the
SCC chip, you will need to use the IIfx Serial Switch to turn off the
IOP.

2. As far as I know, the answer to this question is "no". I don't think
that it is fixable. Goinf through the IOP is going to be slower (in the
cdev, "Faster" should be called "Standard" and "Compatible" should be
called "Compatible and Faster").

3. The IIfx Serial Switch cdev seem to work fine with System 7.  Using
it should not cause any problems...

Scott Winders
internet: winders@aux.support.apple.com
AppleLink: winders.s@applelink.apple.com