But the Visor 'serial' port has only one (input) control line. An out
control line (similar to RTS) would be needed. Handspring has told me
directly that their serial port was designed with keyboards in mind (low
power devices that output only). Ideally USB would work if the hand held
could talk to devices other than hubs. Firewire or USB2 could take care of
most problems (maybe even BlueTooth) but neither are ready for low power
hand held devices yet.
----- Original Message -----
From: "McCollister, Mike" <[EMAIL PROTECTED]>
To: "Palm Developer Forum" <[EMAIL PROTECTED]>
Sent: Thursday, August 10, 2000 7:42 AM
Subject: RE: Future palm hardware considerations...
> I suspect that future Palms with USB will work like the Handspring
devices.
> The Handspring devices have USB and two serial lines (a TX and RX). While
> the TX and RX do not conform electrically to the RS-232 stanard they do
> allow for serial data to be transferred to devices such as a folding
> keyboard or a Hotsync cradle which converts the TX and RX signals to
RS-232.
>
> Mike McCollister
>
>
> > -----Original Message-----
> > From: Richard Hartman [mailto:[EMAIL PROTECTED]]
> > Sent: Wednesday, August 09, 2000 5:31 PM
> > To: Palm Developer Forum
> > Subject: Re: Future palm hardware considerations...
> >
> >
> > Does the equivilant of a "null modem" exist for the USB
> > host/client duality issue? If so, then the palm could be
> > configured as a "host". A direct cable could be used
> > for peripheral devices and the "null modem" could
> > be incorporated into the cradle...
> >
> > --
> > -Richard M. Hartman
> > [EMAIL PROTECTED]
> >
> > 186,000 mi/sec: not just a good idea, it's the LAW!
> >
> >
> > Tom Zerucha wrote in message <20317@palm-dev-forum>...
> > >
> > >On Tue, Aug 08, 2000 at 02:02:36PM -0700, David Fedor wrote:
> > >> >Please, please, please consider retaining the serial port
> > for legacy
> > >> >products. (the Visor TTL serial port is a start but
> > lacks the necessary
> > >> >control lines). Don't put me out of business!
> > >>
> > >> Ok, now I understand your point. Thanks for the
> > clarification; it makes
> > >> sense now.
> > >
> > >Let me second that. At least the Visor has IrDA, but the
> > main problem
> > >with USB I find is that you need a "host" and that means a
> > desktop, so
> > >you can't use it as a "pendant" to set up a device or such.
> > >
> > >Wireless (Mac Airport? Bluetooth?), or 10BaseT ethernet would be
> > >better, or FireWire - anything that two palms could talk together on
> > >without a PC or Mac having to be there.
> > >
> > >Serial tends to be a least-common-denominator, but PCs have parallel
> > >ports for faster access.
> > >
> > >I just want something that doesn't require a desktop.
> > >
> > >
> >
> >
> >
> > --
> > For information on using the Palm Developer Forums, or to
> > unsubscribe, please see http://www.palmos.com/dev/tech/support/forums/
> >
>
> --
> For information on using the Palm Developer Forums, or to unsubscribe,
please see http://www.palmos.com/dev/tech/support/forums/
>
>
--
For information on using the Palm Developer Forums, or to unsubscribe, please see
http://www.palmos.com/dev/tech/support/forums/
