23b1ce7e_SP0256_Instruction_Set__Purpose
[Register] MODE [Size] 2 bits [Purpose] 
Controls the format of data which follows various instructions. In some cases, it also controls whether certain filter coefficients are zeroed or left unmodified. The exact meaning of MODE varies by instruction. MODE is sticky, meaning that once it is set, it retains its value until it is explicitly changed by Opcode 1000 (SETMODE) or the sequencer halts.
SP0256 Instruction Set
Purpose