vortex@charlie.OZ (Mark Gregson) (11/18/89)
Hi there, I am currently running a 4 port serial board that is a clone of the AST 4 port serial board. But I am having a few problems. I was running it under Xenix 286 version 2.2.1 and what was happening was I would use the program xcomm to dial out from my site. Sometimes when I would start xcomm I would try to connect to the modem and would get nothing? So in disgust I would exit xcomm and my login would just hang, I would then login as the root user and try and kill the xcomm process which would never succeed. I could kill my user login but never the xcomm process? Then if I tried to log back in and try again xcomm would come up with errors. No matter what I did I could never be able to kill the bad xcomm process. This problem only occurs on one of the ports on the 4 port board, never tty1A which is a normal COM port. The only way to get out of this problem was to reboot, once this was done the xcomm program would work fine and I could talk to the modem. I have since changed from Xenix 286 to Xenix 386 but the problem is still there?? It seems the port is either locking up or something is holding the port open. I realize that this board would not be the best quality but a friend of mine has a similar board that works fine. Any ideas on the above would be greatly appreciated. Regards, Mark Gregson
jbayer@ispi.UUCP (Jonathan Bayer) (11/18/89)
vortex@charlie.OZ (Mark Gregson) writes: > I am currently running a 4 port serial board that is a > clone of the AST 4 port serial board. But I am having a > I was running it under Xenix 286 version 2.2.1 and what > would try to connect to the modem and would get nothing? > So in disgust I would exit xcomm and my login would just > hang, I would then login as the root user and try and kill > the xcomm process which would never succeed. I could kill You are probably using 8250 chips in the board. Replace them with 16450's and your problem may go away. The 16450 is a high speed version of the 8250, the 8250 really can't go above 8 Mhz or so. JB -- Jonathan Bayer Intelligent Software Products, Inc. (201) 245-5922 500 Oakwood Ave. jbayer@ispi.COM Roselle Park, NJ 07204
vortex@charlie.OZ (Mark Gregson) (11/21/89)
Thanks for the reply to my four port board problem. Being a computer technician I am aware of the speed difference you mention between those 2 chips. This board however does not even use either of those chips. It uses another type of chip, most likely a style of custom serial port chip. At the moment since I'm not at home I can't give you the exact number. But I dont really think the problem lies in the chip, I hope not anyway, I couldn't afford to change them. Well thats my bit for now, any other ideas greatly appreciated. Mark Gregson