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

[Bob Camp]

Hi

The problem with "bit bang" parallel stuff these days is that Microsoft 
has nuked that capability in 2000, ME, and XP. You need a custom 
parallel port driver to get the bits out. Each time a service pack 
comes out things get weird until the driver gets updated.

It's actually easier to do the bit bang operation on the CTS/RTS lines 
on the serial port. That way you already have the RS-232 level 
conversion done as well.

	Take Care!

		Bob Camp
		KB8TQ



On Feb 28, 2005, at 9:32 PM, Randy McLaughlin wrote:

> From: "Jerry" <gh1lockett at bak.rr.com>
> Cc: <greenkeys at mailman.qth.net>; <teletype at buzbee.net>
> Sent: Monday, February 28, 2005 8:12 PM
>> 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..
> <snip>
>
> Keep it simple someone can write a bit banger for the printer port.  
> It could be a simple back box that gets power from the USB port.  A 
> max232 would be all the hardware needed.
>
>
> Randy
>
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