I have run into the same issue with my eMachines T6410. Same MS-7145 rs480m. BIOS has only "sata disable" or "ide controller". On the MSI website their downloadable BIOS file is for AMI. American Megatrends Inc?I!!!! I have a Pheonix Award BIOS.
I called MSI, they say to use that AMI BIOS. I have tried flashing my BIOS with MSI's utility and it says chipset unknown and exits out. (Due to my physical chip having a 'Phoenix-Award' sticker on it
I found Award's BIOS flasher and tried to use MSI's binary, it said, can't flash because its not an Award BIOS.
I called eMachines and they told me to use MSI's file. I'm running in a circle to nowhere.
I was originally trying to enable RAID on my RS480M mobo and the only way to do this was to update the BIOS. No update works. Dead end?
Why the fudge does eMachines use a proprietary BIOS? Why do they disable RAID on that mobo?