Hi,

This is what I'm getting:

https://aliexpress.com/item/1005001614869060.html (adapter)

https://aliexpress.com/item/32725360255.html (burner + clamp,dirty cheap, I wanted the clamp, couldn't resist it)

https://es.aliexpress.com/item/1005002412971490.html (puller)

About the chip: It seems to me that it could be this (please see attachment) However i looked for it on the web and it seems to be a 4 MB chip, while flashrom-listed one would be 512 KB? I hope it will be right...

If I'm getting it right, FreeDOS 1.3RC4 includes flashrom? It would be nice to put anything BIOS-related on a salvaged laptop disk. Perhaps with a DOS boot partition. Hell, last time I flashed a BIOS was almost a decade ago, and I really never played with DOS much more than just doing a win98 boot floppy. But, it could be interesting to do and to have a little hard disk ready for flashing any BIOS I could play wildly with at least 2-3 machines.

Does FreeDOS flashrom work fine? Or  are there any known bugs?

Best wishes

El mié, 17 nov 2021 a las 16:19, Ivan Ivanov (<qmastery16@gmail.com>) escribió:

Regarding the flashing equipment (test clip, programmer) - you could
refer to http://dangerousprototypes.com/docs/Flashing_a_BIOS_chip_with_Bus_Pirate
. There's a SOIC8 test clip with 2.54mm bent pins, so that you can use
any 1P wires of any length and material (preferably copper), and
CH341A programmer with a green PCB.

You'd need to re-check this, but it seems to me that flashrom doesn't
support PMC Pm49FL004T : although not sure, I could only find messages
like this one: https://mail.coreboot.org/pipermail/flashrom/2014-May/012437.html
. The question is, could this chip be replaced with another
alternative chip that's supported by flashrom? But, if you'll still
need to read the existing firmware from Pm49FL004T , then you may have
to get a proprietary programmer (that'll be really overpriced in
comparison to $2 CH341A).

ср, 10 нояб. 2021 г. в 21:00, Betibeteka Beranduetxea <artxitatel@gmail.com>:
>
> Hi
>
> Thank you very much for the heads-up about flashrom.
>
> As said, motherboard is OK with flashrom, but I'm unable to find my BIOS chip on the supported hardware list.
>
> These are the numbers on the chip:
> PMC.
> 0639
> Pm49FL004T-33JCE
>
> As you look much more fluent than me on this matter, could you give any pointer to that chip or an equivalent one?
>
> I looked for the PLCC puller on aliexpress and I have seen some cheap ones, but, would you mind to give me any pointer, should you have any preferences. Same for the programmer...
>
> With that equipement, I could do many tests without fear to brik the machine....
>
> History is, since 2012 I'm using an allmost identical machine to run LinuxCNC. I have been unable to find any other with a so low jitter < 20 usec (excellent for stepper pulse generation). Even current systems give me more jitter. Then this second machine came to me. Only differences are in the case: hard disk placement and frontal USB ports vs USB multicard reader. OS is exactly the same, only BIOS version differs. However, jitter in this second machine is 3-4x worse. That's the reason why I think a BIOS update is in order.
>
> Again, thank you very much
>
> Kind regards from Spain
>
> Roman
>
>