dittman@skbat.csc.ti.com (Eric Dittman) (12/15/90)
I took a look through the manuals and didn't find this documented, so here's a quick question: What does A/UX 2.0 want in terms of hardware handshaking on the built-in serial port? I have wired my cable with HSKi and HSKo going to RTS/CTS. There's also a GPi available. Will A/UX allow use of GPi for carrier detect from the modem (including dropping the session if carrier is lost)? As it now stands if I log in and then lose carrier calling back puts me right back were I was (without the login: prompt) which I don't want. I want the system to require another login. I'm still new at using/maintaining A/UX (and UNIX in general), so I don't even know if this is possible (it is with VMS). Thanks, Eric Dittman Texas Instruments - Component Test Facility dittman@skitzo.csc.ti.com dittman@skbat.csc.ti.com Disclaimer: I don't speak for Texas Instruments or the Component Test Facility. I don't even speak for myself.
andyp@treehouse.UUCP (Andy Peterman) (12/16/90)
In article <1990Dec14.175043.291@skbat.csc.ti.com> dittman@skbat.csc.ti.com (Eric Dittman) writes: >I took a look through the manuals and didn't find this documented, so here's >a quick question: > >What does A/UX 2.0 want in terms of hardware handshaking on the built-in >serial port? > >I have wired my cable with HSKi and HSKo going to RTS/CTS. There's also >a GPi available. Will A/UX allow use of GPi for carrier detect from the >modem (including dropping the session if carrier is lost)? As it now >stands if I log in and then lose carrier calling back puts me right back >were I was (without the login: prompt) which I don't want. I want the >system to require another login. I got it to work by connecting HSKi to the DCD of the modem (pin 8). At the time, I was not aware of the GPI pin which isn't documented anywhere except in the Mac Hardware Reference Manual. I know in the past, on Macs which didn't support the GPI pin, the HSKi was sort of used for this purpose. To get A/UX to respond to the loss of carrier, make sure your initab line looks something like: du:2a:respawn:/etc/getty tty0 mo_2400 or whatever speed your using - the point is to use the 'mo_' form. Then, when your modem drops DCD when the carrier drops, you will be logged out. However, if you're using this same port to dial out, this could cause a problem because without an active DCD, 'cu' or 'uucico' won't work. If you're using a Telebit modem, you can wire this to DSR (pin 8) and set register S53=4, which will drop the DSR line for just 200ms on loss of carrier, but leave it on the rest of the time. -- Andy Peterman | Opinions expressed treehouse!andyp@gvgpsa.gvg.tek.com | are definitely those of (916) 273-4569 | my employer!