> I purchase the multichip programmer from Talking Electronic. Because my
> PC do not have the 9 pins serial port. I am using the modem serial com
> port 2. The modem port is 24 pins and it parallel out the 9 pins
> connector. I connect the modem parallel out 9 pin female connector to
> the multichip 9 pins male connector.

It is hard to make sense of this description, but:

1  -  COM ports come in two standard sizes, 9 pin and 25 pin.  If you have a
device that wants a 9 pin port, you can get an off the shelf adapter so that
it can be plugged into a 25 pin port.

2  -  Both interfaces are serial, not parallel.  The 25 pin is a superset of
the 9 pin.  The extra lines available in a the larger connector are rarely
needed.

3  -  A 25 pin serial (COM) port can use the same connector as the parallel
(printer) port, so you have to be careful which one you are plugging into.
Most newer PCs only come with 9 pin serial ports, which makes this much
easier.


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Embed Inc, embedded system specialists in Littleton Massachusetts
(978) 742-9014, http://www.embedinc.com

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