GMS30C2116 Datasheet, PDF (184/322 Pages) Hynix Semiconductor – USERS MANUAL

A-10
Branch on Carry
Appendix A. Instruction Set Details
BC
Format:
PCrel format
15
87 6
0
OP-code
0
low-rel
S
1111 0100
S: sign bit of rel
rel = 25 S // low-rel // 0
range -128 ~ 126
Notation:
BC rel
Description:
If the carry flag C is set (C = 1), place the branch address PC + rel (relative of the first byte
after the Branch instruction) in the program counter PC and clear the cache-mode flag M;
all condition flags remain unchanged. Then instruction execution proceeds at the branch
address placed in the PC
When the branch condition is not met, the M flag and the condition flags remain
unchanged and instruction execution proceeds sequentially.
Note: rel is signed to allow forward or backward branches.
Operation:
If C = 1 then
PC := PC + rel
M := 0
Exceptions:
None.