[clug] USB to RS232 DB9 Adapter

[George at Clug]

Bryan,

To answer your question "But the polar software expects COM1 or COM2. How can I get /dev/ttyUSB0 to appear as COM1?"

>From what I can determine you have everything set up correctly.

Have you tried DOS's 'mode' command to see if you can set COM1 ?  (that is if DOSBox has a 'mode' command like DOS does.

And previously you said;
" That command reports thus.
{
/dev/ttyUSB0
} "

To me this indicates that the name of your serial port is indeed "ttyUSB0"

On my computer when I used hwinfo;
# hwinfo --short
...
  /dev/ttyS0           16550A
  /dev/ttyS1           16550A
...

so I expect that the DOSBox settings should be;
...
    [serial]
    serial1=directserial realport:ttyS0
    serial2=disabled
    serial3=disabled
    serial4=disabled
...

Which means that your settings should be correct from what I can determine (except I would suggest setting serial2 also to 'disabled').
...
serial1=directserial realport:ttyUSB0
serial2=dummy
serial3=disabled
serial4=disabled
...

At this point I would suggest 1) testing DOSBox using a different Serial device if you have one and DOS software to test it with, and/or 2) try a physical DOS computer that has a serial port.

I am starting to wonder if there is a flat battery or a fault with your Polar Heart rate hardware.

If you read below I have added some of the results of my Internet searching, all of which indicates you have your file correctly configured (except for "serial2=dummy").

George.




On Wednesday, 07-08-2019 at 22:47 Bryan Kilgallin via linux wrote:
> Thanks, Steve:
> 
> >> I've installed DOSBox on my PC. And I've copied the Polar heart rate
> >> analysis software to a directory that DOSBox sees as C: drive.
> >>
> >> But the polar software expects COM1 or COM2. How can I get
> >> /dev/ttyUSB0 to appear as COM1?
> > 
> > 
> > DOSBox is more for old DOS games than running DOS programs, you might
> > have more luck with DOSEmu.
> 
> Neither Ubuntu Software nor Synaptic Package Manager list that.
> 
> > A quick google for "DOSBOX Linux Serial" points me to
> > 
> > https://www.scivision.dev/ubuntulinux-dosbox-setting-up-usb-to-serial-rs232-port-convertor/
> > 
> > Which has some steps for you to try.
> I've made the suggested tweaks.
> 
> The DOSBox config file has these sections:
> 	* sdl;
> 	* dosbox;
> 	* render;
> 	* cpu;
> 	* mixer;
> 	* midi;
> 	* sblaster;
> 	* gus;
> 	* speaker;
> 	* joystick;
> 	* serial;
> 	* dos;
> 	* ipx; and
> 	* autoexec.
> 
> I have posted a query on whether serial1 should be set to modem. Might I 
> try some other serial setting tweak?

Doing a google search for;  "debian" "how to" DOSBox "usb serial port" "serial1=directserial realport"

Returned;

http://sense.net/~egan/virtual82240b/
Linux Users:

    Change/Verify serial port permissions.  E.g., my :Linux server has a physical serial port (/dev/ttyS0), but it is not available for non-root and non-uucp users.  To avoid any problems type:

    chmod 666 /dev/device name

    E.g. for my system:

    chmod 666 /dev/ttyS0

    NOTE:  Your Linux serial port device may be different, e.g. if connecting your 50g with USB and if you have USB Serial setup (http://hptalx.sourceforge.net/hp49gplus.shtml#AEN35) then you would use /dev/ttyUSB*.  Check your documentation.
     
    Create a dosbox directory in your home directory (or anyplace else you like).
     
    Create a new DOSBox config file in your ~/dosbox directory, with the following lines:

    [serial]
    serial1=directserial realport:serialport
    serial2=disabled
    serial3=disabled
    serial4=disabled

    [autoexec]
    mount c path to dosbox directory
    c:

    Where serialport is your Linux serial port without the leading /dev/, e.g. my config file:

    [serial]
    serial1=directserial realport:ttyS0
    serial2=disabled
    serial3=disabled
    serial4=disabled

    [autoexec]
    mount c /home/egan/dosbox
    c:

After saving your configuration startup DOSBox.  NOTE:  Linux users don't get an easy to use icon to launch, so just type this:

cd ~/dosbox
dosbox -conf config

https://askubuntu.com/questions/1108267/usb-virtual-com-port
if the laptop is running ubuntu try typing "hwinfo --short" It will output a list of all devices with names and ports connected. The end of my list gives "/dev/ttyUSB0 Prolific PL2303 Serial port" and that is the device i have connected.

DOSBOX So running your app in a DOSBox i would need to type "serial1 directserial realport:ttyUSB0" in the dosbox terminal to make the app able to connect to COM1.


https://ubuntuforums.org/showthread.php?t=1871853
I know this is an old topic, but I ran into the same problem, and for the sake of clarity, my COM1 port is /dev/ttyUSB0 (usb to 9 pin serial) and my line for Dosbox is:
Code:
serial1=directserial realport:ttyUSB0












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