A few months ago, I bought this Kouwell KW-524E(S) IO card on eBay. I have a PC AT machine with one internal DB25 serial port that shows up as COM1 in MS-DOS. The Kouwell card, which has a DB9 serial port that I want to use, shows up as COM2. While serial communication works on the internal DB25 …

Do you intend to have the serial port programmed as 7-N-1 on the DOS side? That's a bit unusual No, that's just the default. That screenshot was from when I decided to not "set term bytesize 8" to see if it would make a difference after having made numerous, various attempts with "set term bytesize …

Ok, I've narrowed down the problem to the Kouwell IO card that I have plugged into one of the 8-bit ISA ports. I got a DB-9 to DB-25 null modem cable from Amazon today so that I could use the internal DB-25 serial port on the PC instead of the card. I tested it just now, and it worked without issue. …

I'm trying to connect my 286 PC that is running MS DOS 5.0 with my modern PC that is running Slackware via Kermit over a null modem cable. I have the speed set to 9600 in both Kermit sessions, yet if I type anything in on either machine, it shows up as jank on the other machine. I've tried several …