This is program from Ulrich Waibel. You can use this for OS/2 (sio.sys) and for dos(vsio.sys). Please select this in the config.sys. select also the IRQ and I/O Adress after the device command. Please remark the orignal device drivers from OS/2 if you use it. also you can make dignostics with the AT-PUS PC about the IRQ's and so one. it's not allowd to use it, it's only for test.