It is a RISC processor as are most consoles and a RISC processor wouldn't really be much of a help for emulation due to the lack of commands.Originally Posted by bangulo
A games console can be RISC because its doesn't need to be compatible with older games and stuff.
PC's are CISC because you want a game you bought a year ago to continue working on your modern PC. As such most processors in PC's will have the instruction set from processors dating back to the 80's.
RISC processors will not have a large selection of commands and so for it to emulate a DC game through hardware they would need to Microprogram Dreamcast instructions directly onto the chip.
If you want an efficient chip that can run things designed for multiple systems then you would not make it a RISC processor, you would make it CISC.