david@uowcsa.cs.uow.oz (David E A Wilson) (03/22/88)
We are running System V UNIX on an Opus 110PM card plugged into a 10MHz PC/AT compatible. The COM1 & COM2 ports on the motherboard work for both DOS & UNIX. We purchased a 4 port serial card which is supposedly compatible with one of either the Hostess multiuse adapter or the AST 4 port card. Unfortunately, after configuring the card as COM3..COM6 (at addresses 3e8, 2e8, 3e0, 2e0) and altering the the OPUS.CFG file to include lines like <tty2=comh1(io=0x3e8,int=5)> etc the system finds them at boot time (as I discovered because the documentation had the addresses for COM6 and COM7 swapped) but any attempt to use them when the system is running results in a hung process which cannot be killed except by rebooting the system. Changing over to the AST driver (coma1 instead of comh1) makes no difference. When the port is first used (ie a cu out through it) DTR is asserted and nothing more can be done with the port. The serial card in question is Australian made and has 4 NS16450 chips on it (== i8250?). If the motherboard ports are disabled, and the card strapped for COM1..COM4, the first two ports on the card can be used from UNIX. Can anyone offer any assistance to us as to how we can get the ports working? They will be used to connect to another computer for networking and debugging a single board ns32k computer so we should not need a multiuser license as mentioned in the Opus manual. What is the difference between a Hostess card and the AST card? David E.A. Wilson ACSnet: david@uowcsa.oz Dept. of Computing Science UUCP: ...!munnari!uowcsa.oz!david Uni. of Wollongong ARPA: david%uowcsa.oz@uunet.UU.NET