Anybody heard of Dreamcast BIOS v1.01c?

[megavolt85]

Curious if the BIOS is region free, he put the GDROM back in and it didn't run a JP title.

1.01c has no software differences from 1.01d, they work exactly the same.

Now after trying to install the hardware GDEMU in both his consoles, the GDEMU no longer works (just a black screen).

let him look at the connector that is inserted into the motherboard

[my2k2zx2]

Here is the gdemu pics. It's no longer working, just getting a black screen on both consoles. https://imgur.com/a/xJAXtQc
I've got a new gdemu on order, but will take a couple weeks to arrive.

[megavolt85]

I'm willing to bet that if you replace that crappy connector, your GDEMU will work
these cut connectors caused a lot of problems to users

[MoeFoh]

I'm willing to bet that if you replace that crappy connector, your GDEMU will work
these cut connectors caused a lot of problems to users

Indeed. Some are only 5mm-6mm tall instead of 8mm tall, so getting good contact with the motherboard connector can be iffy.

Hopefully, he'll get a better quality board with newer firmware.

Avoid this type of GDEMU connector

[my2k2zx2]

I took a multimeter to the board and it has a ton of shorted parts. I think it finally gave up. Not sure what to do with it at this point.
I'll report back when I get the new one.

[my2k2zx2]

5.20.5 arrived and is in the va0.
Using the SD tool with the gdemu button checked it still goes back to system menu after selecting a game.
Using the Openmenu button, games boot every time with the default theme and gdemu theme.

[megavolt85]

There is no point in checking GDMENU, there are no changes for it and there will not be any.
I need you to do several tests, firstly when using GDEMU 5.20.x you need to add the line image_tests=0 to the GDMENU.ini file on your SD card
What images did you try, where did you download them?
try running the game using codebreaker, select the game and press the B button.

[my2k2zx2]

What difference am I looking for with the image-tests added in?
I downloaded a big set from archive.org, file name has tosec in it.

[megavolt85]

image_tests=0 will disable strict image checking, some GDI cannot be recognized, for example all atomiswave games.
launching games with the B button uses a codebreaker, but it uses a different way to launch games
My task at this stage is to understand what exactly is blocking the launch.
P.S. I have a suspicion that there are two types of Bios 1.01c

[my2k2zx2]

In Openmenu, codebreaker loads and does apply a cheat. I tried infinite time on Crazy Taxi and it worked.
Is there a way to dump the bios? I do have an serial/SD adapter but never messed with it.