HDD GURU FORUMS

Hii all,

In order to save the need to solder in and out rom chips I bought the following new programmer and it's cable.
I can't figure out how do I connect between the programmer and the attached cable.
Please cheack the attached picture.
The picture tell everything.

* In the picture I numbered the cable by number 1 and the programmer by number 2.
How do I connect number 1 to number 2?


Best Regards,

I guess it's related to DR, so on topic here. Did you not get a jumper board like the one in this picture:
http://goo.gl/hghaa

It plugs into the programmer and you push the connector onto the upward-facing pins.

I knew I missed somthing.
LarrySabo thank you very much for the link. I am looking for what you called jumper board - > I don't have it right now.
Where can I get it?

* You guessed right it is related to DR - instead of soldering out and in rom chips between boards, this trick should save me the trouble.

MCUMall sells just about everything programmer related. They have what you need: a 8 pin inline DIP M-to-M header: http://goo.gl/GPLfB
They are in Vancouver, BC.

You could easily make one of these from Radio shack / tandy / jaycar /dick smith or whatever your favourite electronics store is.
just follow the pinout of the chip to where it is supposed to be in the programmer

Do you guys normally use this while the package is still located on the board? I have had issues with contention from other chips. What is your procedure for getting around this; if you don't mind me asking. Maybe I am overlooking something? Or is this the norm?

I have programmed many 24lC02 chips without desoldering on monitor motherboards, but haven't had much other experience.

I think that as the ROM chips are designed to be programmed/updated etc while on the board, it is ok.

I've had problems with a laptop motherboard, where the check-sum would change each time I made a backup of the ROM. I can't be sure the CMOS battery had been removed, so I suspect that was the cause. You would obviously not want the device to be powered when you do the save/write.

I have only tried doing this a few times with hard drive PCBs and was unable to get it to work with the chip connected to the PCB.

HaQue wrote:I have programmed many 24lC02 chips without desoldering on monitor motherboards, but haven't had much other experience.

I think that as the ROM chips are designed to be programmed/updated etc while on the board, it is ok.

I can read the EDID data via the monitor's video connector while the monitor is powered down. In fact the EDID/DDC spec requires that the EDID EEPROM be powered from an external supply.

I have actually made a VGA-to-DIP8 adapter for this purpose. Pin #9 of the DB15 connector is the +5V external supply pin.

LarrySabo wrote:I've had problems with a laptop motherboard, where the check-sum would change each time I made a backup of the ROM. I can't be sure the CMOS battery had been removed, so I suspect that was the cause. You would obviously not want the device to be powered when you do the save/write.

I can't see why the CMOS battery would have had any bearing on the outcome. Instead I suspect that there may have been a contention problem. I would think that if you were to hold the board in a reset state, then this may help. One way to do this might be to remove the CPU or RAM, or perhaps to short the PSU's POK signal to ground.