VT220 as Terminal
jetfuel at babbage.csus.edu
Wed Jun 5 14:58:51 AEST 1991
In article <390.284B3B5B at mcws.fidonet.org> BHeess at mcws.fidonet.org (Brian Heess) writes:
>Has anybody setup a real DEC VT220 as a terminal to the 3B/1?
>I have been hacking around on it (the 3B/1 manuals haven't been much help,
>yet). Pretty much everything in the 3B/1 manuals is stuff that anybody could
>figure out anyway.
In the Terminal Emulation User's Guide (v3.51), pp C-3 & C-4, there are two
diagrams for rs232 wiring. The unix-pc requires a more substantial adherance
to rs232 than many computers - 2, 3, and 7 alone don't make it, folks.
I opted for the second diagram, as the shell is killed when turning the tty
>Anyway, if you have, can you let me know what settings you used on the 3B/1,
>and the appropriate settings for the VT220 (mainly for the COMM choice off of
>the main SETUP screen, and the VT100/VT100 ID settings).
On the 3b1 side, my "stty -a" looks like this:
speed 9600 baud; line = 0; intr = ^c; quit = ^|; erase = DEL; kill = ^x; eof = ^d; eol = ^`
-parenb -parodd cs8 -cstopb -hupcl cread -clocal
-ignbrk brkint ignpar -parmrk -inpck istrip -inlcr -igncr icrnl -iuclc
ixon ixany -ixoff
isig icanon -xcase echo echoe echok -echonl -noflsh
opost -olcuc onlcr -ocrnl -onocr -onlret -ofill -ofdel tab3
Compare this to your normal console "stty -a".
>I have both set for 9600, and no HFC on the 3B/1.
>I have tried a bunch of settings on the VT220, and so far, no "Welcome to the
>AT&T UNIX pc"...
For the vt220/vt320 (I have used both, and set them identically, and used the
VT200 Mode, 7 Bit Controls
VT220 ID (if your firmware has this option)
No New Line
XOFF at 64
8 Bits, No Parity
1 Stop Bit
No Local Echo
DEC-423, Modem Control (vt320 - does the 220 have this?)
No Auto Answerback
Break (does this matter?)
<X] Delete (I don't recall if the 220 has this - it just selects the
ASCII code sent by the delete key - DEL or ^H - I use DEL
because the systems I dial out to expect that)
>From the Set-Up Directory, I recommend doing a "Clear Comm" after each change,
since the tty can get into a weird state otherwise.
I suspect the reason you don't even get garbage (that is true, isn't it?) is
that your cable is incomplete.
>I finally got the VT talking to a modem after changing LOCAL to ON-LINE
That helps, I've found.
>Any hints GREATFULLY appreciated!
This is about all I can offer - "It worked for me."
"Pro is to con, as progress is to Congress..."
>>-@@-> Dave Jenks uunet.UU.NET!babbage.ecs.csus.edu!jetfuel
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