[GreenKeys] USB-to-serial adapters, and baudot

[Jerry]

Bill, I think some of those guys were interested in running it on their 
laptop computers, and most laptops these days don't have a serial port 
or any way to add one.  Desktops are easy to add a PCI card as you 
mentioned, but notebook computers, well, you are sorta stuck methinks.. 
There might be someone selling USB add-ons that would work but I haven't 
seen one.

Jer..

----- Original Message ----- 
From: "William Bytheway" <bythewayb at readysetsurf.com>
To: "gil smith" <gil at baudot.net>; "Veenstra, Lester" 
<Lester.Veenstra at intelsatgeneral.com>
Cc: <greenkeys at mailman.qth.net>; <teletype at buzbee.net>
Sent: Monday, February 28, 2005 5:51 PM
Subject: RE: [GreenKeys] USB-to-serial adapters, and baudot


:I suspect that the USB hardware/software interface did not implement 
the
: 16550 UART completely.  RTTYAppXP, RTTYArt and PSK31-BAUDOT all use 
the
: newer data control block (DCB) structure to define the control setting 
for a
: serial communications device. If the USB interface software omitted 
support
: for the lower BAUD rate, then I can see why it would not work. Has 
anyone
: tried contacting the USB RS232 manufacturers?  They also may have left 
out
: 5-bit control as well.
:
: Keep in mind that the older RTTYApp used direct hardware access, which 
is
: not friendly with WindowsXP.  The newer version, RTTYAppXP replaced 
the
: direct calls with the Win32 functions. All are available from my web 
site
: at http://207-207-72-42.ip.theriver.com .
:
: I have seen PCI serial port cards with real 16550 UARTS and up to 4 
ports
: on the market.  These should work.
:
: Bill Bytheway
: K7TTY
: