Testing Blargg's tests: cpu_instrs 01-special.gb 02-interrupts.gb 03-op sp, hl.gb 04-op r, imm.gb 05-op rp.gb 06-ld r,r.gb 07-jr,jp,call,ret,rst.gb 08-misc instrs.gb 09-op r,r.gb 10-bit ops.gb 11-op a,(hl).gb