The official MIPS ABI doesn't have $ in front of the software names for the integer registers http://math-atlas.sourceforge.net/devel/assembly/007-2816-005.pdf & the debugger thinks you're entering a hex number when you're trying to use them. I've left the disassembler, but the official ABI doesn't use them in source either (the only supporting evidence I found for them is the Linux ABI). I also removed the space padding which hasn't had the intended effect since the new debugger was introduced. [smf]