irwin@uiucdcs.UUCP (09/22/84)
If it is a DZ, remember that they interrupt on every char in. Maybe the interrupt logic is going to sleep, could also be dirty contacts between board and backplane. Cleaning the contacts and reseating the board may just do the trick. I have seen some very funny things solved by doing that.
irwin@uiucdcs.UUCP (09/22/84)
If it is a DZ, remember that they interrupt on every char in. Maybe the interrupt logic is going to sleep, could also be dirty contacts between board and backplane. Cleaning the contacts and reseating the board may just do the trick. I have seen some very funny things solved by doing that. Also if it is a DZ, check the ribbon cable between the ports and the controller, it may not be properly seated. I say this because you stated that it would not echo.