If this is your programmer ,

http://www.xeltek-ic.com/english/products/84/521.html

then the observed behaviour is normal.

The datasheet for the flash chip says VPP (programming voltage) is 12v . Your programmer only supports 5V VPP, AFAICT .

https://pdf1.alldatasheet.com/datasheet-pdf/v … 001BX-B120.html

darry wrote on 2022-02-26, 20:37:

If this is your programmer , […]
Show full quote

If this is your programmer ,

http://www.xeltek-ic.com/english/products/84/521.html

then the observed behaviour is normal.

The datasheet for the flash chip says VPP (programming voltage) is 12v . Your programmer only supports 5V VPP, AFAICT .

https://pdf1.alldatasheet.com/datasheet-pdf/v … 001BX-B120.html

Would it be possible to inject voltage?

TimWolf wrote on 2022-02-26, 22:01:

darry wrote on 2022-02-26, 20:37:

If this is your programmer , […]
Show full quote

If this is your programmer ,

http://www.xeltek-ic.com/english/products/84/521.html

then the observed behaviour is normal.

The datasheet for the flash chip says VPP (programming voltage) is 12v . Your programmer only supports 5V VPP, AFAICT .

https://pdf1.alldatasheet.com/datasheet-pdf/v … 001BX-B120.html

Would it be possible to inject voltage?

I am pretty sure that can be done . I believe that you would need to lift or isolate the VPP pin from the programmer and feed 12v from a something like a bench PSU (AFAIU, ground would need to be at same level (connected to) as whatever powers the programmer. I suggest validating with someone more experienced/ knowledgeable than I am before attempting this .

Two other options :

a) get a flash programmer that handles 12v VPP
b) Get a replacement flash chip that has a similar pinout and specs but can be programmed with 5v VPP (never program it in the motherboard unless said motherboard can be reconfigured to provide 5v VPP).

Why do not flash the new bios from the mainboard using uniflash?
You wouldn't have any issue with 12 volt in that case.

Nemo1985 wrote on 2022-02-26, 23:44:

Why do not flash the new bios from the mainboard using uniflash?
You wouldn't have any issue with 12 volt in that case.

That would be a great option if the board could be made to boot which, AFAIU, is not currently possible due to the partially corrupted flash chip .

Hot flashing in another board that is 12V VPP capable is yet another option (if another such board is available).

The BIOS may not be the issue with the RAM: https://web.archive.org/web/20060311211424fw_ … L1/faq.html#q30

darry wrote on 2022-02-26, 23:57:

Nemo1985 wrote on 2022-02-26, 23:44:

Why do not flash the new bios from the mainboard using uniflash?
You wouldn't have any issue with 12 volt in that case.

That would be a great option if the board could be made to boot which, AFAIU, is not currently possible due to the partially corrupted flash chip .

Hot flashing in another board that is 12V VPP capable is yet another option (if another such board is available).

Yes that's right, if you have a 486 or a 430fx or cheapo vx chipset it may have a 12volt eeprom.

I do not know if more recent motherboard equipped with 5v eeprom can do 12v honestly.

Another chance could be to use a 5v eeprom if you have any to spare (the motherboard should have a jumper to select the voltage of the eeprom).

darry wrote on 2022-02-26, 23:57:

Nemo1985 wrote on 2022-02-26, 23:44:

Why do not flash the new bios from the mainboard using uniflash?
You wouldn't have any issue with 12 volt in that case.

That would be a great option if the board could be made to boot which, AFAIU, is not currently possible due to the partially corrupted flash chip .

Hot flashing in another board that is 12V VPP capable is yet another option (if another such board is available).

Verify by doing a lookup on the ROM chip used to boot the board for hot flashing.

I did get it working on this device with version 5 of the software. I think it was just the crummy programming of the software. Version 3, 6, and 8 did not work.