Support for 4 COM ports in Native Oberon is relatively recent. According to http://www.oberon.ethz.ch/native/WebAlpha.html Andr=E9 Fischer added this on 04.09.01. His changes also allow the port addresses to be configured arbitrarily.

You could try fetching V24.Mod and ConfigV24.Mod from: ftp://ftp.inf.ethz.ch/pub/ETHOberon/Native/Update/Alpha/Source1.zip and compiling them, but there might be complications due to new interfaces that would be non-trivial to address.

My modified V24.Obj works with my modem at COM4 now but it is not the interrupt driven version. :-\ Question: Does Andre', or anyone, know of any reason why his Alpha V24.Mod would not work within the Native/Update/Beta 08.12.00 version of Oberon? Charles Angelich The Ghost in the Machine! DOS and W31 Tech website: http://www.undercoverdesign.com/dosghost Stories, poems, music, and photos website: http://www.undercoverdesign.com/dosghost/faf