Thanks ... that may be the best help I can get: to know I'm using the wrong tool! I'll switch to Dosemu for this one.

Hello -- I'm running a custom DOS app on dosbox 0.71 on PuppyLinux 4. In the code, I need to both write to and read from some custom boards at port addresses 0x300 through 0x31A. I see some sections for port access for sound blaster cards etc, but I don't see how I can configure for access to …