[TUHS] Setting System V up for local echo TTYs?

A friend of mine has gotten an AT&T 3B2 running at the Vintage Telephone Equipment Museum here in Seattle. A Teletype model 33 and a 37 can now also connect (through a small step-by-step switch and then a #5 crossbar) to the computer. Even if System V is not exactly classic UNIX, I hope the configuration as a whole counts. The 33 has local echo. The 37 has it too (but supposedly that's easier to change). I've been experimenting with the correct stty settings, but it's hard to get everything right. Mostly I've been experimenting with the 33 since the 37 just started working yesterday. Could some setting cause line feeds to intermittently not happen, so that two lines are overprinted? I'm wondering if this is due to a mechanical problem in the 33, or to line noise (which I know we are having) because I can't see much pattern to when lines are being overprinted. Are there any input settings that allow me to use LINE FEED and CAR RET interchangeably as line terminators in canonical mode? I'm assuming they won't affect the output settings, so that programs can print NL (which becomes CRLF) or CR (which stays CR). Is the terminal driver smart enough to print the LF character while the CR is happening, so I can shorten the delay settings? That's only dealing with output. Is the driver smart enough to change the timing when dealing with input? (since the driver can't change the LF key into CRLF because the LF is already happening when the driver sees it). I have tabs expanded on output. Can I get the terminal driver to expand them as input is being echoed? And what controls echoing of login names? (besides /etc/gettydefs) We want to turn that off for certain lines. If you need more details, they will have to wait until Tuesday. Sorry. And does anyone have any ideas about interesting ways to demonstrate the features of the 37, 43, and 5610? I thought eqn might be smart enough to use the half and reverse line feeds, and vertical tabs, of our 37. Does any software know about the ribbon colors? What about software to control tape readers and punches? We probably don't have the extra 32 printing characters that dmr's pages on early UNIX mention. Thanks, -- Derek