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olympics
Posted on 08-03-21 01:14 AM Link | #4131
Hey, I'm having a big problem with my bios files. So I used to use public bioses you download online to play melonds, but now I am banned from Wiimmfi until I get my own bios files. And I finally dumped my files, and I renamed them and put them in the right spot. Despite all of that, I keep getting an error message saying "DS ARM9 BIOS is not a valid BIOS dump". I already looked it up, and didn't find anything related, and I asked people in a MKDS wiimmfi discord, and practically nobody there could figure it out. I tried this on 2 different DS lites, and they both ended up with the same problem. I'm really confused. Does anybody here know what is possibly wrong? Thanks.

Wifall
Posted on 08-03-21 07:14 AM Link | #4136
There are 3 bios files that you should add in melonDS for it to work: Bios9.bin(ARM9), Bios7bin(ARM7) and firmware.bin, make sure they're properly named before booting up like this picture:
[image]

olympics
Posted on 08-04-21 04:36 AM Link | #4143
Whats your discord, because im having issues with these options with replying

Wifall
Posted on 08-04-21 04:39 AM Link | #4144
What's the model of the DS that you dumped the bios from?
MelonDS discord is in this link: https://discord.gg/6cReUNG3X8

olympics
Posted on 08-04-21 08:57 PM Link | #4147
its a DS lite

Arisotura
Posted on 08-04-21 09:06 PM Link | #4148
what are the filesizes of your BIOS/firmware files?

____________________
Kuribo64

olympics
Posted on 08-05-21 12:56 AM Link | #4149
bios7 is 16kb, bios9 is 0kb, and the firmware is 256kb

poudink
Posted on 08-05-21 02:53 PM (rev. 2 of 08-05-21 02:54 PM) Link | #4154
Yeah a 0kb file is definitely not right. It should be 4kb.

____________________
Nothing to say, so jadnjkfmnjamnfjkldnajfnjkanfjdksan jsdnvj m.

Wifall
Posted on 08-05-21 02:57 PM Link | #4155
It's a bad dump for sure. I would recommend trying to dump your firmware again.

Rayyan
Posted on 08-05-21 03:17 PM Link | #4157

What are you dumping it with?

____________________

How to write an emulator
1. throw code to be emulated somewhere
2. make memory system that allows accessing that code
3. emulate CPU
4. have fun implementing all the other hardware
-- Arisotura, Tuesday 5th January 2021, 22:00:17

olympics
Posted on 08-05-21 09:42 PM Link | #4158
I'm dumping it with this https://www.youtube.com/watch?v=CtxSxmvwaKc

Rayyan
Posted on 08-05-21 10:52 PM Link | #4159

Follow the FAQ instead of this YouTube video and see what you get.

____________________

How to write an emulator
1. throw code to be emulated somewhere
2. make memory system that allows accessing that code
3. emulate CPU
4. have fun implementing all the other hardware
-- Arisotura, Tuesday 5th January 2021, 22:00:17

olympics
Posted on 08-06-21 10:49 PM Link | #4169
I dont see anything in the FAQ

Rayyan
Posted on 08-06-21 10:51 PM Link | #4170

check again and read the 'Getting started with melonDS' section.

____________________

How to write an emulator
1. throw code to be emulated somewhere
2. make memory system that allows accessing that code
3. emulate CPU
4. have fun implementing all the other hardware
-- Arisotura, Tuesday 5th January 2021, 22:00:17

olympics
Posted on 08-08-21 10:31 PM Link | #4187
So I have to find it in the forums?

Vulpliks
Posted on 08-08-21 11:26 PM Link | #4188
Posted by olympics
So I have to find it in the forums?


Take a look at this link:
https://melonds.kuribo64.net/faq.php

olympics
Posted on 08-09-21 01:16 AM (rev. 2 of 08-09-21 01:34 AM) Link | #4193
the Bios 9 file is still 0KB


Does it have something to do with the DS lite?

Messiah42
Posted on 07-30-22 08:13 PM Link | #5437
I ran into the same issue (on DS Lite). I'm not sure of the cause, but I believe the file format on the SD card is to blame. Here's how I fixed it:

1. Dump the BIOS and insert your SD card in your PC. It should have a 0KB size.

2. In File Explorer, under Computer, find your SD card. Right click and select Properties, then Tools and Check now. This should hopefully detect the error and now your file will have a size. If it's 4KB, try it in melonDS: it should work. If not:

3. You will have to shorten the file to 4KB. To do this, I suggest using dd (for Linux) or dd for windows (obviously for windows). Put the BIOS file and dd.exe in the same folder and open a command prompt. To shorten the file to 4KB run the following command: "dd bs=1 count=4096 if=input_file of=output_file". input_file and output_file are the current name and new name for the file. In my case: "dd bs=1 count=4096 if=BIOSNDS9.ROM of=BIOS9.ROM". If the command is successful, you should have a new file with size 4KB that works.

I know this is a from a year ago, but looking for a solution this is the first link that comes up. Hopefully it will help somebody else!

Jet3
Posted on 01-29-23 07:56 AM Link | #5799
This fix did the trick for me, had to run dd to shorten the file (was 16KB) Is there any reason why the bios9 is getting corrupted? I know it's the last file that gets dumped, but even in the dump it says the correct size, could it be the SD Card? The allocation size or some other property when it was formated? Or is it the dumper that is corrupting the file? Do the dumper works flawlessly for other users?


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