laird@think.com (Laird Popkin) (04/23/91)
I have an old 520ST (with only an external floppy drive!) with 1 Mb RAM, and I am having trouble with the serial port. I am trying to use it with a Telebit Trailblazer modem, and it works fine with a low speeds (e.g. 2400 bps) but it tends to lock up at PEP speeds (19.2K bps). I tried installing a program in my AUTO folder which was supposed to fix the problem, but all that did was to cause the modem to _always_ lock up. I've used the modem with other ST's (a STacy and a Mega) and it seemed to work fine, so I believe that the problem must be in my ST. Can anyone suggest anything to check? Is there a likely connection to check, or chip to replace? Thanks. - Laird Popkin (laird@think.com)