DS412+ rebuild bios

[BangFR]

Hi,

I've found some helpfull information on this forum (thanks a lot for sharing them) and tried to rebuild the bios of my DS412+.

I desoldered the chip and read it with an EZ2023+ programmer.

The backup shows 1st part of the chip (till 2Mb) with some information (some part were blank 0xFF but mostly some code
and the second part empty (0xFF)

I extracted the bios_R2.rom from the pat file (bios_R2 because my board is released v1.4 so I assume it was this one) and flash the chip
so 1st part = bios_R2.rom
2nd part = empty (0xFF)

But before resoldering it, I'm trying to be sure it's ok and reading the topics I still have question

From this topic Bios rebuild

From this topic Rebuild a DS412+ from .pat file
Explain where put the .rom found in .pat the advise was to paste it at the 2nd part (from address 0x200000 to 0x3FFFFF) and empty the 1st part

On the backup of the bios, this is the reverse: 1st part with data, 2nd with none

So I wonder if I have to apply
1st part empty, 2nd bios.rom
OR 1st part backup, 2nd bios.rom
OR just used the bios sent by Electrixman to Vitaliy

Thanks in advance for Elextrixman, ragnarok and Vitaliy for the answer or anyone that know how to do this.
@ragnarok , @Vitaliy @Elextrixman

I took image provided by Elextrixman. It is 4MB file, where only first half is used, copied bios.rom tp this file from 0x200000. I upload this file to chip and guess what!!! I have beep, solid blue and flashing orange. Time to try assemble it

Same to you ;-)

And yes

• Let the first half from 0x0h - 0x1FFFFFh be 0xFFh filled, and
• Copy the content of bios.ROM from the .PAT archive to 0x200000h - 0x3FFFFFh

..resulting in a 4.194.304 bytes file, and burn that to the Winbond.

 

[ragnarok]

Hi,

I've found some helpfull information on this forum (thanks a lot for sharing them) and tried to rebuild the bios of my DS412+.

I desoldered the chip and read it with an EZ2023+ programmer.

The backup shows 1st part of the chip (till 2Mb) with some information (some part were blank 0xFF but mostly some code
and the second part empty (0xFF)

I extracted the bios_R2.rom from the pat file (bios_R2 because my board is released v1.4 so I assume it was this one) and flash the chip
so 1st part = bios_R2.rom
2nd part = empty (0xFF)

But before resoldering it, I'm trying to be sure it's ok and reading the topics I still have question

From this topic Bios rebuild

From this topic Rebuild a DS412+ from .pat file
Explain where put the .rom found in .pat the advise was to paste it at the 2nd part (from address 0x200000 to 0x3FFFFF) and empty the 1st part

On the backup of the bios, this is the reverse: 1st part with data, 2nd with none

So I wonder if I have to apply
1st part empty, 2nd bios.rom
OR 1st part backup, 2nd bios.rom
OR just used the bios sent by Electrixman to Vitaliy

Thanks in advance for Elextrixman, ragnarok and Vitaliy for the answer or anyone that know how to do this.
@ragnarok , @Vitaliy @Elextrixman

From what I understand, Vitaliy used the file from Elextrixman and loaded the bios.ROM from the .PAT file on top of that to 0x200000h as I suggested. I think that worked for Vitaliy…