[nzlug] Serial port

[Martin D Kealey]

On Mon, 2 Oct 2006, Vik Olliver wrote:
> On Sat, 2006-09-30 at 15:00 +1200, Martin D Kealey wrote:
> > However the cross-over is only for pins 2 & 3 -- I'm not patching DTR
> > etc (does anyone remember how these days?)
>
> Oh yeah. They remember.
>
> What baud rate are you running at? Some modems are picky, and some old
> PC chipsets were pretty picky too. Try changing the baud rate under
> minicom.

Have tried 115200, 57600, 38400 and 9600 (just to be on the safe side).

> Does minicom run on the other machines? If so, a comparison of what LEDs
> light up might be handy.

Das unblinken litten confirm that the port is dead...

> If you can, check the voltages coming in/out on pins 2/3 during idle and
> "break" periods. Some serial ports had a funny idea of what was good
> enough for RS232.

Hmm, will check those later. (I suppose the main drive voltage inverter
could be knackered. Or the +/-12V from the main PSU might be out; nothing
else would notice.)

> There are always RS232/USB adaptors to fall back on.

Solve the whole problem in 25 minutes, including driving time to & from DSE.
Happy now. :-)

(While I was there I also bought an extra 256MB 133MHz RAM to put in the
machine; 128MB minus the 64MB swiped by the video card was a bit too
cramped, and the swapping was not going to impress the parents.

Thanks for your help Vik.

-Martin