I recently changed my mobo to a DFI Nforce4 board which doent have the com port on the back, instead there is a dual-row 9 pin header hidden near the bottom of the board Ive checked the manual and it doesnt even mention it.. and so I dont know the pin out.. So it looks like so: |||| ||||| Any ideas what the pinout is? Id really like to aviod damaging my mobo and the programmer... The reson I need it is for a JDM pic programmer.. so I cant get a USB-> serial port becuase it needs the -12v rail to work
you can get DB9's with ribbon cable and DIL connectors premade for dirt cheap from http://www.frontx.com/, but if you must know the pinout: 1. CD - carrier detect 2. RXD - receive data 3. TXD - transmit data 4. DTR - data terminal ready 5. GND - system ground 6. DSR - data set ready 7. RTS - request to send 8. CTS - clear to send 9. RI - ring indicator
Thanks Im gonna make one as I have all the bits ready anyway. The frontx site has 2 pinouts: http://www.frontx.com/cpx102_2.html http://www.frontx.com/cpx102_2b.html Is there any easy way to find out which is which?. Im thinking I could attach a LED to one of them and use software to toggle it on and off, no idea what software for win2k though
if it is any modern motherboard, it will be the first one that i copied. the "versionB" is usaly only found on 386/486 era boards. worst case you switch ground and Tx, which will simply not work (will not cause any damage).
If your sure it wont cause damage You have saved me from using a really, really old, crappy pc (amd k6-2 300 - of which the cpu is about equal to a pic..) for programming. Thank you
yeah, ive done it before you may find as you get farther into programing that a seprate computer isnt nessesarly a bad thing. but no prob
Well it seems it didnt work At worst its only broke a 70p pic, so doesnt matter... Before when I have used the programmer Ive never been able to ssee the LED becuase it was plugged in round the back - should it be lit when reading the pic? I thought it was only for programming? I started up IC prog, and tryed to read my 12F675 and it read it as blank - it shouldnt be. Last time I used it I had a flashing LED program on to test it, used to work but now it doesnt... As for another computer, maybe when I have my new USB kb/mouse switch working (my brother took my last one to work ). I have my old pc here which I used last time. I suppose I could connect it back up and see if the pic still works, after making an pin header > other half of cable,converter.
I had pin 7 and 8 mixed up, fixed now.. I hope Its reading the pic that I messed up, the code is all messed up but should be fine after reflashing.
My pic thinks its something else! I just erased it in IC prog and get this: Code: ; Generated by WinDis84, (c) Nigel Goodwin 1998. LIST P=16F84, F=INHX8M include "P16FXX.inc" ORG 0x0000 ORG 0x2100 DATA 0xFF END Edit:reburnt it and it works, but still thinks is a 16F84..
