Bios modding help

[frankr2994]

Ok long shot here but I can't find anyone to help me out on the forums that really deal with this stuff. I bought a ch134a programmer and pulled a dump from my dell t5810 bios chip. Modded it with amibcp flashed it and pulled another dump to verify I have the new modded bios installed. Pc works fine I didn't brick it but nothing I enabled in amibcp shows up in bios. I selected USER for for the root items and sub items I wanted which is supposed to make them visible. Ultimately I'm trying to overclock this further than what the bios currently allows me to do with throttle stop. I can get a good clock but I need it to let me pump more amperage in.

[Guest]

1 hour ago, frankr2994 said:

Ok long shot here but I can't find anyone to help me out on the forums that really deal with this stuff. I bought a ch134a programmer and pulled a dump from my dell t5810 bios chip. Modded it with amibcp flashed it and pulled another dump to verify I have the new modded bios installed. Pc works fine I didn't brick it but nothing I enabled in amibcp shows up in bios. I selected USER for for the root items and sub items I wanted which is supposed to make them visible. Ultimately I'm trying to overclock this further than what the bios currently allows me to do with throttle stop. I can get a good clock but I need it to let me pump more amperage in.

The power limits on OEM is locked. You would have to build a bios from scratch. Not many people know how to write bios. Want to overclock and raise power limits, your money would be better spent on a motherboard with those capabilities. Sorry for the bad news.

[frankr2994]

Yes I know it's locked. This is why I have an external flash programmer. It's an AMI bios. They put everything in there for Dell to chose what they wanted to use. I have access to all the options but I guess there is a little bit of code I need to change to view hidden menus. I will get this figured out I know others have it's just unfortunate those people aren't around for me to question. I do believe I could make any and all changes while I edit the bios and make those changes default. So regardless of being able to see them after a flash it's done..... however that's a PITA to change anything.

[Guest]

2 hours ago, frankr2994 said:

Yes I know it's locked. This is why I have an external flash programmer. It's an AMI bios. They put everything in there for Dell to chose what they wanted to use. I have access to all the options but I guess there is a little bit of code I need to change to view hidden menus. I will get this figured out I know others have it's just unfortunate those people aren't around for me to question. I do believe I could make any and all changes while I edit the bios and make those changes default. So regardless of being able to see them after a flash it's done..... however that's a PITA to change anything.

Unfortunately, I don't have a lot of experience with OEM bios moddification.

 

However, I can try and point you in the right direction.

https://www.bios-mods.com/forum/Forum-Dell--342

 

Hope this helps!

[frankr2994]

Appreciate it. I'm already posted over there and at win raid. I only posted here as well because even though there is no dedication here to that kind of work I know there are some very talented people at this forum. Someone seems to be trying to help me now over at biosmods. Fingers crossed. No matter where I find the answer I'll be sure to put it up on here and everywhere else I posted. This has been a challenge in research with the limited number of sources out there. I might as well make it easier for the next guy.

[Guest]

2 hours ago, frankr2994 said:

Appreciate it. I'm already posted over there and at win raid. I only posted here as well because even though there is no dedication here to that kind of work I know there are some very talented people at this forum. Someone seems to be trying to help me now over at biosmods. Fingers crossed. No matter where I find the answer I'll be sure to put it up on here and everywhere else I posted. This has been a challenge in research with the limited number of sources out there. I might as well make it easier for the next guy.

Ok cool. I hope you do find out, because I'm curious to know and will be able to apply this information to aftermarket motherboards that are locked.

 

The last guy came along wanted to try and unlock memory frequencies in the same fashion. I modded the bios myself, but the settings didn't appear in the bios just like yours. He wanted to go for higher memory frequency. Well that didn't work out for one main reason the particular chipset just doesn't support higher speeds and the firmware had the selection for user, but the coding doesn't exist in the bios for that particular board, so there's nothing to show. That was the conclusion we came out with on that one.

 

So I wish you lots of good luck!!

[frankr2994]

What I need to find is the amiMMTool I believe. I'm using ifr extractor to read the modules but it can't open everything. I can only read so much in the hex editor but I really need to know the main file system so I can change it. 

[Guest]

4 minutes ago, frankr2994 said:

What I need to find is the amiMMTool I believe. I'm using ifr extractor to read the modules but it can't open everything. I can only read so much in the hex editor but I really need to know the main file system so I can change it. 

You can only edit what is there. It is more than likely you would build a bios from the ground up.

[frankr2994]

Obviously too much for me to do in a year lol. My coding/programming experience is very limited. I am finding in the efi files I can open and read that there are variables actually called on as default actually designated (default) whatever variable this is it's typically not the one called for. I'm using a simple example as something I can readily see in the bios which is sata operation. If I reset cmos sata operation defaults to raid. The efi file calls for ahci however the variable for raid is (default).  It appears that any default designation takes precedence and needs to be changed. I may be able to chase that further up the tree but I'd like to see if I can really make just ONE setting stick. It would be the first win in this thing. I really cannot figure out how to edit the efi file directly. I can extract with ifr so I can read it and know the address for everything but where do I go from there?

[Guest]

56 minutes ago, frankr2994 said:

Obviously too much for me to do in a year lol. My coding/programming experience is very limited. I am finding in the efi files I can open and read that there are variables actually called on as default actually designated (default) whatever variable this is it's typically not the one called for. I'm using a simple example as something I can readily see in the bios which is sata operation. If I reset cmos sata operation defaults to raid. The efi file calls for ahci however the variable for raid is (default).  It appears that any default designation takes precedence and needs to be changed. I may be able to chase that further up the tree but I'd like to see if I can really make just ONE setting stick. It would be the first win in this thing. I really cannot figure out how to edit the efi file directly. I can extract with ifr so I can read it and know the address for everything but where do I go from there?

The variable for raid is IDE. That's why its default most likely.

 

If motherboards bios are like video cards, the information is encrypted. There is heavy limitations to what you can change. 

 

I can't be much further of help. Most of any bios mods I've done is with legacy hardware mostly.