Toshiba L655-12L bios

[dj_ricoh]

can some help me with a bios?
i got the original.
its got pass on it.

now the story :

it was working and had a few scratches because someone try to desolder bios battery and broke a pad.

scratches under memory but i did work. he even desolder bios bt i don`t know why.

now as soon i desolder bios first pad came of. one line its not hard to rewire but Nothing, 0 activity.

i wanna know because the first try i work on the bios without scope, with bare eyes and maybe i made a short.

i can read the chip and write it back with ezp and ch341 but the chip has no activity on oscilloscope the 3.3v or 3.5 v its flat.

PW BT drops down on depress but still nothing.

is the bios file bad or my shi tty chip has gone fubar?

maybe another bios file will show!??!?!

[ala_borbe]

Re: Toshiba L655-12L

not sure i understand but here is bin from web update

hope it helps

[dj_ricoh]

Re: Toshiba L655-12L

If i can read and write, can the chip be bad?

Its flat on scope. No activity.

[ala_borbe]

Re: Toshiba L655-12L

does your programmer have ability to verify eprom?
if not, write and read, and then compare crc of both files, thay must be the same

in the past i had eeproms which reads, erases, wite with no error but written and read data are not the same as written file (some adresses in eprom dead)

[dj_ricoh]

Re: Toshiba L655-12L

I'll write this one on it and read it back.

And ill test(read) with ezp and ch and show you.

Ty

[dj_ricoh]

Re: Toshiba L655-12L

alright!

so i got the bios here and guess what?!?!?

every device i use on this chip if i click verify it blocks and gives a error.

i have to take out the usb and plug it in back.

again ! it reads and writes the chip (delete all perfect)

already ordered 2x sst25vf016b .

maybe i get lucky


the sad part is that i always preach to others : Don`t work after others(you don`t know what they did) and i do it!

[dj_ricoh]

Re: Toshiba L655-12L

it still gives me a error on verify with ezp with the new chips.

CH still takes half a hour to write.


p.s. when i write with ezp some line goes after read with FF FF.
they become FF after read

what CH341 writes on the chip EZP2010 reads null FF FF on all the chip

[dj_ricoh]

Re: Toshiba L655-12L

i think the ezp its dudu and ch341 can`t do similar.

anyone got the old firmware for ezp? not the v3.0

i try on xp with them i try on win7. they all do the same.

they write then after read some address goes FF FF

[dj_ricoh]

Re: Toshiba L655-12L

Alright.
Bought another ezp. Ofc it did the same.
The seller gave me something that I scrap after 1 week when I bought my ezp, adapter to solder the chip. I hate it because I had to solder and desolder the chip twice.

Now when I bought the second one and i saw that is doing the same I tested the clip that I was using to hold the chip and the continuity was OK.

So I tested with the adapter that I have to solder and guess what it freaking work.

Ala_borbe the bios you gave it works.
Thank you

[ala_borbe]

Re: Toshiba L655-12L

i always unsloder bios from board and solder on adapter, it gives me trouble sometime, but i know that my programmer works, so i make 2-3 adapter and try another or recheck solders

always keep handy one working eprom that i can use to test if programmer broke or something else is wrong cos most spi chips are compatible, only mind the size, although i have placed bigger ones cos i did not have proper size and it worked every time (take 4mb bios and place 8mb eprom and add 0x00 to rest 4mb to fit size)

anywas glad to hear its working