Hi,

I am trying to access a device that is connected to a usb-serial converter which makes the device available as COM5 in Windows.

I have changed the configuration like this:
serial1=directserial realport:COM5

When I start DOSBox, I get the message:

Serial1: Opening COM5

But as soon as the DOS program tries to access COM1, I get:
Serial1: Warning: Tried to activate FIFO.
Serial1: Errors occured: Framing 0, Parity 0, Overrun 1 (IF0:0), Break 0

And then the program hangs.

The same happens, if I use the real hardware COM1:

serial1=directserial realport:COM1

Result:

Serial1: Warning: Tried to activate FIFO.
Serial1: Errors occured: Framing 0, Parity 0, Overrun 8 (IF0:0), Break 0

(The number of Overruns changes from one try to the next.)

It works on native COM1 on Windows XP without DOSBox.

I would prefer using an usb-serial port converter rather than a native serial port, but would settle for native it usb-serial does not work.

Any hints?

twm