JDM programmer problems

[unluckypaul]

I am getting no where with the jdm pic programmer -
**broken link removed**
It is one of the ones mentioned in the sticky, on the site it shows it being made with a db-25 connector, but on all the apps i've tried the jdm setting is setup for a serial port (icprog.) Is there a way of mapping a parallel port to serial (as opposed to ltp.) Or do i need to change my design to use a serial port. It looks like it'd convert to serial easily enough except for pin 20 dtr. It seems like a popular design, i get the feeling i'm missing something really simple but after a few days of attempts i'm running out of ideas , i've tried searching for similar problems but cant find anything.

 

[Nigel Goodwin]

The JDM is a serial port only programmer - serial ports use 25 pin sockets as well, just the opposite sex to parallel ports. Later PC's moved the serial port to a smaller socket, but often kept a 25 pin legacy socket as well.

The JDM might be 'popular', but it's also the most unreliable PIC programmer there's ever been - is was a very clever experiment to create a minimum parts count programmer, but relies on the serial port exceeding the RS232 standard.

The reason my software, WinPicProg, doesn't support serial port programmers is that I didn't consider the JDM reliable enough for me to offer support for it.

 

[unluckypaul]

cheers, that does make sense now