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

[Lester.veenstra K1YCM]

Question: For your H-UC232S Serial Port to USB Adapter
Does it support baud rates down to 45.5 and will it support 5 bit 
characters?
     Thanks
              Lester Veenstra   K1YCM/3
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William Bytheway wrote:

>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
>
>
>-----Original Message-----
>From: gil smith [mailto:gil at baudot.net]
>Sent: Monday, February 28, 2005 8:27 AM
>To: Veenstra, Lester
>Cc: bythewayb at readysetsurf.com; teletype at buzbee.net;
>greenkeys at mailman.qth.net
>Subject: RE: [GreenKeys] USB-to-serial adapters, and baudot
>
>. . . .
>
>
>  
>

-- 
Lester Veenstra
Senior Engineering Program Manager
Intelsat General
6550 Rock Springs Drive, Suite 450
Bethesda Maryland, 20817
+1-301-571-1212
e-mail: lester.veenstra at intelsatgeneral.com