Re: [avr-chat] Avrdude and JTAG / Dragon...

[David Kelly]

On Mar 2, 2009, at 6:30 PM, Russell Shaw wrote:

> > > They often have a 10-pin header on the motherboard for connecting an
> > > rs-232 connector and parallel port.
> > How does a 10-pin motherboard header translate to a 25 pin parallel  
> > port?
> > http://www.interfacebus.com/Design_Connector_Parallel_PC_Port.html
>
> Because it's morning, i didn't word it right to say that it's only the
> rs-232 that's 10 pins. The parallel one has more. I added a DB-9  
> rs-232
> and an lpt port to my pc using a cable and back-connectors from an old
> junk pc. Motherboard is a P5E-V HDMI.

One caution: there are two different pinouts used for 10 pin  
asynchronous serial ports on PC motherboards and serial cards. Only  
one uses an easy ribbon cable connection from DB9 to 10-pin header.  
IIRC the other literally used pin 1 to 1, 2 to 2, 3 to 3 ... and had  
to have each line hand connected to the DB9 or DB25.

--
David Kelly N4HHE, address@hidden
========================================================================
Whom computers would destroy, they must first drive mad.