BIOS protection by Holly

[OzOnE]

Ahh, thought so.

Looks like it's just a quick way to disable the drive by scrambling the checksum again then?

I'm wondering if the 0x001ffff can be reduced though?
It may just be to set the "size" of the final checksum and initialize it.

It might be possible to get a correct checksum using a much smaller part of the BIOS, but we'll still need to find the algo.

btw, I think the File Explorer corrupted my HDD slightly - I was trying to copy the OTOREI.CDI from SD to HDD, and it dumped a few junk folder names on the drive?
It didn't complete the copy either, it just took half a second to "copy" a 700MB file?

I was looking at trying OTOREI, as it's apparently the only title which used the DC MIDI interface?
The MIDI IN / OUT signal test pads are supposed to be at the back of the mobo (underside) near the G2 expansion port.
I thought it might be fun to connect a MIDI keyboard + synth to that soon.

Anyway, I'm still hoping to get time today to connect the FPGA board so I can try to brute-force the BIOS checksum.
It's just that the soldering is a bit daunting, 'cos I'll have to figure out the pins for the G1 IDE connection again. lol


OzOnE.