Serial console problems on 11/34

[Julian Wolfe]

It's null modem RS232.  The wiring of the 25 pin connector is the same as
BC05C (I copied it verbatim from the DL11-W manual).

I have it hooked to an actual DEC VT220.

Also, I can't figure out what you mean by no dtr/dsr and rts/cts.  The
DL11-W has those signals.

The settings on the VT220 are 9600, Receive=Transmit, 8 data bits, no
parity, 1 stop bit.

I've also tried this with *just* ground, send and receive lines (crossed
over) - same result.

Those settings are reflected on the DL11-W.

No clue what to do at this point.

> -----Original Message-----
> From: cctalk-bounces at classiccmp.org 
> [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Bill Pechter
> Sent: Wednesday, June 21, 2006 1:24 PM
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: Re: Serial console problems on 11/34
> 
> What's your terminal and cable look like.
> It should be null-modem rs232.
> 
> The DEC 11/34 uses Xon/Xoff flow control -- not dtr/dsr or 
> cts/rts so those need to be looped back on the pc if you're 
> using one as a vt100.
> 
> Transmit should go to receive and receive to transmit.  A 
> straight through cable won't do it.
> 
> Bill
> 
> On 6/21/06, Julian Wolfe <fireflyst at earthlink.net> wrote:
> >
> > I have, what I now know for a fact is the correct lines set 
> up on the 
> > serial console on my 11/34.  the correct signals are coming out 
> > according to my tester box.  However, I cannot respond to 
> the prompt.
> >
> >
> >
> > I started with the diagnostic on the front panel, which 
> says if I hit 
> > CLR
> > 173024 LAD EXA I should get 173000.  I don't.  I get 127777.  
> > According to the manual there is something wrong with the 
> M9301 or the 
> > switches are set wrong, and all the switches are ON.  Do 
> you guys know 
> > of anything else that could be the case?  I do get 
> different results 
> > whether or not I hook up the faston tabs going to the front 
> panel or 
> > not - I get 177777 if I don't hook them up at address 173024.
> >
> >
> >
> > Any help would be much appreciated, as always.
> >
> >
> >
> > Julian
> >
> >
> >
> >
> >
> >
>