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| VP-298 programmer one simple acute question + picture http://forum.hddguru.com/viewtopic.php?f=7&t=26414 |
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| Author: | Scorpion [ July 15th, 2013, 18:39 ] | ||
| Post subject: | VP-298 programmer one simple acute question + picture | ||
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,
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| Author: | LarrySabo [ July 15th, 2013, 21:36 ] |
| Post subject: | Re: VP-298 programmer one simple acute question + picture |
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. |
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| Author: | Scorpion [ July 15th, 2013, 22:19 ] | ||
| Post subject: | Re: VP-298 programmer one simple acute question + picture | ||
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.
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| Author: | LarrySabo [ July 16th, 2013, 8:13 ] |
| Post subject: | Re: VP-298 programmer one simple acute question + picture |
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. |
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| Author: | HaQue [ July 17th, 2013, 3:45 ] |
| Post subject: | Re: VP-298 programmer one simple acute question + picture |
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 |
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| Author: | Jar [ July 24th, 2013, 8:38 ] |
| Post subject: | Re: VP-298 programmer one simple acute question + picture |
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? |
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| Author: | HaQue [ July 24th, 2013, 10:04 ] |
| Post subject: | Re: VP-298 programmer one simple acute question + picture |
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. |
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| Author: | LarrySabo [ July 24th, 2013, 10:30 ] |
| Post subject: | Re: VP-298 programmer one simple acute question + picture |
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. |
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| Author: | Jar [ July 24th, 2013, 17:20 ] |
| Post subject: | Re: VP-298 programmer one simple acute question + picture |
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. |
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| Author: | fzabkar [ July 24th, 2013, 17:49 ] |
| Post subject: | Re: VP-298 programmer one simple acute question + picture |
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. |
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| Author: | fzabkar [ July 24th, 2013, 17:55 ] |
| Post subject: | Re: VP-298 programmer one simple acute question + picture |
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. |
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