Re: Serial port slow on Linux dosemu

[Paul Crawford <psc@sat.dundee.ac.uk>]

> When using the 2 config entries below "and" the -s option "as root" the
> serial port speeds up to almost what it should be. It now takes 2
> seconds to test the cable. That is good however, using the -s option
> seems to force some sort of full screen and the "ega" graphics is then
> broken. Without the -s option my window is as I define it in the config
> file and "ega" graphics works OK.
>
>
> $_ports = " device /dev/null range 0x3f8 0x3ff fast"
> # $_com1 = "/dev/ttyS0"
>
> Please help

If you attempt to get direct hardware access to any of the PC's I/O 
ports (such as the UART for this case) you need to use -s for dosemu and 
have it running with root privileges (e.g. adding it to sudo list, etc).

Just using '-s' should not break the graphics as such, unless your 
software is also trying direct graphics card I/O access and that is 
being passed through.

Regards, Paul