ND-1xx Instructions Sorted Numerically

See also: ND-1xx Instructions

Instruction Set
NORD-10/ND-100/ND-120 instructions are all exactly 16 bits (1 word) long. Addressing mode, displacement, source register, destination register are, when applicable, encoded inside the 16-bit instruction word itself.

Note that GECO is an undocumented instruction. The undocumented NORD-1 instruction IOT (not listed) is also partly supported by NORD-10 and ND-100 CPUs: IOT SKA (opcode 161000) is the equivalent of MONitor calls for the range 0-127 (MON 0 .. MON 177).