Hey Steve,

Any FTDI FT232R or FT2232 based dongle can do it.

AN232B-05 Configuring FT232R, FT2232 and FT232B Baud Rates https://www.ftdichip.com/Support/Documents/AppNotes/AN232B-05_BaudRates.pdf

t's a matter of how do you get the custom rate programmed in Windows. I haven't used Windows for probably 12 years now, so I don't really know how to set custom baud rates, but I know it is possible.

Ken


On 4/26/20 2:49 AM, Stephen Adolph wrote:
Ah, I see. Which I dont have. Clearly I should get one. What is an example of one that is worth owning? I recall having one that was useless so I gave up on usb serial.



On Sunday, April 26, 2020, Stephen Adolph <twospru...@gmail.com <mailto:twospru...@gmail.com>> wrote:

    Standard pc ports dont support 76800 do they?

    On Sunday, April 26, 2020, Stephen Adolph <twospru...@gmail.com
    <mailto:twospru...@gmail.com>> wrote:

        I know that Ken, Nothing else can though?


        On Sunday, April 26, 2020, Ken Pettit <petti...@gmail.com
        <mailto:petti...@gmail.com>> wrote:

            Hey Steve,

            M100 can run at 76800 on it's UART.

            Ken

            On 4/26/20 2:39 AM, Stephen Adolph wrote:
            John what are you connecting to at 76800?   I dont think
            I have anything other than an m100.


            On Sunday, April 26, 2020, John R. Hogerhuis
            <jho...@pobox.com <mailto:jho...@pobox.com>> wrote:



                On Sat, Apr 25, 2020 at 7:25 PM Stephen Adolph
                <twospru...@gmail.com <mailto:twospru...@gmail.com>>
                wrote:

                    Still playing around with the BCR TTL serial port.
                    ...yes it has it's limitations... half duplex, no
                    flow control, bit-banged

                    ..but it is fast!  Today I was able to get 32kB
                    transferred in 7 seconds.  That's pretty close to
                    100% utilization on the 57600 baud line.


                Very cool :-)

                    I think that is a new M100 record.  It might need
                    independent verification!


                Close!

                I just measured TBACK.EXE at 76800bps dumps all 32K
                to a PC in  6.56seconds.

                > .\TBACK.EXE -b -f COM9 ABACK.CB

                At 19200 it's like 9 seconds.

                :-)

                TBACK.EXE has you RUN"COM:98N1E" and it injects a
                small program that bootstraps up to 76800bps and then
                blasts the data out the port.

                -- John.



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