Altair serial port update

This is so true. I have one of those boxes on this particular system and it at least tells me what's going on with the lines. At this point I'm at a loss as to what's wrong. I believe that the card works based on the loopback program. It's got to be a problem with the loader and how the paper tape image is coming over the line from the terminal (a laptop). I really need someone with a known-working configuration that uses an SSM card to let me know how it's configured. Otherwise, I'm going to have to setup a trade for a real Altair SIO card. Rich -----Original Message----- From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Tony Duell Sent: Saturday, August 06, 2005 4:17 PM To: cctalk at classiccmp.org Subject: Re: Altair serial port update my I don't want to say how many times I've made that sort of mistake :-) Another word to the wise... Get one of those little in-line RS232 testers. The one I have has 7 bi-colour LEDs on it that monitor TxD, RxD, RTS, CTS, DSR, DTR and CD. I've seen one with more LEDs too. I'm always using mine to cheack whether an RS232 port is wired as a DTE or DCE. Or if it drives any of the handshake lines. I find it a lot more use than my fancier breakout boxes, comms analysers, etc. -tony