This site was given as an example, not a guide to action. There was described the process for another model.
In terms of BIOS compression, everything is good. The manuf didn't use it.
You need to truncate file to 4MB size, not 2. Then goes the code for the flasher program, which handles various data from it.
(02-05-2023, 11:23 AM)Maxinator500 Wrote: [ -> ]This site was given as an example, not a guide to action. There was described the process for another model.
In terms of BIOS compression, everything is good. The manuf didn't use it.
You need to truncate file to 4MB size, not 2. Then goes the code for the flasher program, which handles various data from it.
Got the CH341A Programmer today. Just want to be sure:
I have "apl5607 pn61m" chip and "winbond 25032bvsig 1129" chip, I assume the "winbond 25032bvsig 1129" is the BIOS chip. Voltage is 3.3
Got it all right?
Edit: Apparently I got the black model which has over-voltage problem. I just ordered the newest version with a voltage switch.
(02-26-2023, 04:55 PM)Maxinator500 Wrote: [ -> ] (02-26-2023, 01:06 PM)WillingMost7 Wrote: [ -> ]I have "apl5607 pn61m" chip and "winbond 25032bvsig 1129" chip, I assume the "winbond 25032bvsig 1129" is the BIOS chip. Voltage is 3.3
That's correct.
For some reason these are the only options I get when I press on detect chip:
[
attachment=24689]
I even used the new CH341a v1.7, which has voltage control (cause I thought that with the black version the problem I only detected these is because the voltage is set to 5v, apparently not).
I use a clipper, not removing the actual chip. But it shouldn't be a problem.
Red line from the clip is on number 1 on the green board that connects with the programmer,
number 1 is facing opposite side of the USB,
it is seated on the 25XX side (closer to the USB).
I discovered just now that if I connect the laptop battery and disconnect it,
the programmer is able to recognize it is from the W25Q32 family and gives all the options with 3.3V.
I selected W25Q32BV which is my model but yet when I press read it is not working anymore.
I tried every option there and it ended up the same.
[
attachment=24690]
Any reason it would do that? As I explained everything is connected properly. I'm lost..
(02-26-2023, 04:55 PM)Maxinator500 Wrote: [ -> ] (02-26-2023, 01:06 PM)WillingMost7 Wrote: [ -> ]I have "apl5607 pn61m" chip and "winbond 25032bvsig 1129" chip, I assume the "winbond 25032bvsig 1129" is the BIOS chip. Voltage is 3.3
That's correct.
Found
this forum which elaborates a little better on chips locations of the L420.
So there are 3 chips that can contain the bios: "25q32bvsig" and "25x40bvsig". Which one would contain the BIOS and what the other one is for?
Thanks in advance!
Edit: As it seems, the "25x40bvsig" is only 512KB and the "25q32bvsig" is 4MB so it must be the "25q32bvsig".
But it just isn't able to finish the job of flashing. Farthest I've been able to do is to read, but each time I reread it shows different values and it definitely fails at erasing and writing.