[GreenKeys] Teletype 32-ASR

[tony.podrasky]

What does the interface do about the non ITA#2
characters when it receives them?

UE,
W6ESE - tony
NNNN
ZCZC

On 06/11/2013 12:50 PM, Trammell Hudson wrote:
> On Jun 11 2013 1:32 PM, tony.podrasky wrote:
>> [...]
>> I don't think the machine is worth much: guys want an
>> 8-level (ASCII) machine that they can connect to an
>> old computer - like an IMSAI (sp?) - and have a retrograde
>> setup.
>>
>> To make matters worse, if it runs at 66 Words Per Minute,
>> it's even more oddball because normal Teletype service is
>> usually 60 WPM.
>
> The interface board and firmware that I've designed for the ASR33 and
> Model 15 could be used for this sort of odd interface to connect it to
> modern hardware.  All of the current loop driving, weird baud rate
> generation and ASCII to code mapping is handled in the AVR firmware so
> that it shows up as a normal USB serial port to the computer.  So if
> you're planning on connecting it to a Pi or SimH virtual machine instead
> of an RTTY receiver or something like a real Altair, this might be a way
> to make use of an oddball device like this one.
>
> I recently posted a short write up on the Model 15 part of the
> interface: http://www.nycresistor.com/2013/06/06/usb-teletype/
>

-- 
Tony J. Podrasky | "My  dog  is worried about the economy
                  |  because Alpo is up to 99-cents a can.
                  |  -That's almost  $7.00  in dog money!"
                  |                         -Joe Weinstein