From Intellivision Wiki
|Instruction Name||Branch on No Carry|
|CP1610 Clock Cycles||7 or 9|
|Opcode Range||$0209, $0229|
The Branch on No Carry opcode (BNC) is a two-decle opcode that is a part of the Branch family of opcodes. This instruction causes the CP1610 to branch if the Carry Flag is clear to the address specified by the following parameters.
Format - Decle #1 Format - Word #2 (All 16 bits are significant) 0000:0010:00d0:1001 aaaa:aaaa:aaaa:aaaa
d indicates the direction of the branch such that: d == 0 indicates to branch in the forward direction d == 1 indicates to branch in the reverse direction
aaaaaaaaaaaaaaaa indicates the amount of offset
See the Branch opcode family documentation for more information.