Re: IIGS 115,200 Baud Serial Port - How?

["Michael J. Mahon" <mjmahon@aol.com>]

Jeff Blakeney wrote:
>   To: Hugh Hood
> On Mon, 29 Dec 2008 22:15:35 -0600, Hugh Hood wrote:
>
> > So, can ProTERM be patched to communicate at 115,200 baud through the SCC,
> > or not?
> >
> > Surely some young (or old), fresh, sharp minds will solve this and will lead
> > me from the wilderness before I lose what's left of my sanity.
>
> Does ProTERM not use port drivers?  I seem to recall having to select a
> port driver when I set up ProTERM last so wouldn't it be easier to write
> a IIgs port driver that supports 115,200 bps?  If the main ProTERM
> program won't let you display a selection for 115,200 bps, which I'm
> pretty sure it won't, the driver could be called "IIgs Modem 2xBPS" and
> you could tell the users that the speed setting they select in ProTERM
> will be half the actuall port speed thereby making the 57,600 bps
> selection in ProTERM set the port speed to 115,200 bps.  This way, no
> patching is required.

As schmidtd has pointed out, running at 115kbps requires very tight
timing constraints, and it is unlikely that the standard mechanisms will
support them.

-michael

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