Dear friend, please make sure that you're getting a CH341A programmer ( "burner" ) with a green PCB. That's because some ch341a programmers with a black PCB - just like your link! - have a problem: they are giving 5V instead of 3.3V which could damage some chips.
> 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... Yes, from the attachment it seems your chip is really supported (and the messages about "unsupported" were old - sorry for that). As for the size of a chip: it is 4 Mbit = 4 Megabit = 512 KB, so the size is correct there. > If I'm getting it right, FreeDOS 1.3RC4 includes flashrom? I don't know if FreeDOS includes flashrom out-of-the-box, but yes there's a flashrom build for freedos as well as for windows. > Does FreeDOS flashrom work fine? Or are there any known bugs? Compared to a flashrom for Linux, the other platforms are less popular and therefore are more likely to have the platform-only bugs that aren't experienced by the majority of people. So, for a flawless flashrom experience I still recommend a Linux LiveCD or just a full Linux where you can easily install a flashrom. modern Linux is really user-friendly and there's no good reason to avoid it ;-) чт, 18 нояб. 2021 г. в 01:56, Betibeteka Beranduetxea <artxita...@gmail.com>: > > Ooops... here's the attachment > > El mié, 17 nov 2021 a las 23:51, Betibeteka Beranduetxea > (<artxita...@gmail.com>) escribió: >> >> 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 (<qmaster...@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 >>> <artxita...@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 >>> > >>> > _______________________________________________ flashrom mailing list -- flashrom@flashrom.org To unsubscribe send an email to flashrom-le...@flashrom.org
