leeke@cascade.STANFORD.EDU (Steven D. Leeke) (01/06/87)
After 2 marginally successful hours with a breakout box I would like to
solicit help from the net. Here is what I am trying to do (and what has
been happening so far):
I want to hook the COM1 port of a PRO350 running Venix 1.0 up to a
Macintosh Plus running MacTerminal in VT100 mode, as a second terminal.
At the Mac Plus end is a Mac 512k peripheral adapter taking the MINI8 plug
to a DB9 and the DB9 goes into an 8 conductor RJ11, of which only the inner
6 are used. At the PRO end is a DB25 from the 6 conductor RJ11. The
pin connections are as follows:
DB9 DB25 Signal
=== ==== ======
1 7 Signal Ground
5 2 Transmit Data
6 20 Data Terminal Ready
9 3 Receive Data
(Pins 4,5, and 6 on the DB25 also appear to be active. I tried various
combinations of tying them together or to gnd or high with no changes.)
I was expecting to have to flip 2 and 3 (null modem), but this was not the
case. With the above configuration I could do:
cat foo > /dev/com1
and the output would appear on the Mac, but editing /etc/ttys to make
com1 an active terminal and then forcing init to restart with 'kill -2 1'
as mentioned in the Installation and Maint. Manual failed to produce the
'login:' prompt on the Mac end.
So, it appears that I can send data from the PRO to the Mac, but not the
other way around. Does anyone have any helpful suggestions on how to solve
the problem?
Thanks for your help,
Steve Leeke
--
Steven D. Leeke, Center for Integrated Systems, Stanford University
{ucbvax,decvax}!decwrl!glacier!leeke, leeke@cascade.stanford.edu
"I suppose they don't use money in the 23rd century?"spf@clyde.UUCP (01/07/87)
I suppose you've already tried this, but just in case, try hitting carriage return on the MAC; maybe DTR is not making a transition, so the getty on COM1 doesn't know it has to prompt. Getty also responds to <CR> so it's worth a try. By the way, how do you like VENIX on the PRO? Have you tried using any of its "real-time" features? I have a PRO-350 running the P/OS Toolkit (an RSX port), because I need real-time capabilities in my home psychoacoustics lab, but I've been considering going to VENIX. I've used it in "standard UNIX" mode, and although slow it seems reasonable. But I've got no feedback on the real-time features like preemptive process priorities, 1/60 second sleep increments, and asynchronous I/O. Any impressions would be interesting. I'd also like to know where to get it for less than $1K! Steve Frysinger *** We don't need to know the answers to hope and pray for peace. -- Renaissance