'cp31dssp' BIOS apparently doesn't like something here:

Code:
[:mpcc]  * : Reg 19 -> 1e  
[:mpcc]  * : Reg 1c -> 8c  
[:mpcc]  * : Reg 1d -> 00  
[:mpcc]  * : Reg 1e -> 1c  
[:mpcc]  * : Reg 1f -> 00  
[:mpcc]  * : Reg 0d -> 00  
[:mpcc]  * : Reg 15 -> 00  
[:mpcc]  * : Reg 05 -> 80  
[:mpcc]  * : Reg 11 -> 40  
[:mpcc]  * : Reg 08 -> 80  


It prints 'MPCC ERROR' right after.