DR805x Instructions set details
- 44 -
3.20. JNZ
Instruction:
Function:
JNZ rel
Jump if accumulator is not zero
Description: If any bit of the accumulator is a one, branch to the indicated address;
otherwise proceed with the next instruction. The branch destination is
computed by adding the signed relative-displacement in the second
instruction byte to the PC, after incrementing the PC twice. The
accumulator is not modified. No flags are affected.
Operation:
(PC) ← (PC) + 2
if (A) ≠ 0
then (PC) ← (PC) + rel.
Bytes:
Cycles:
2
3
Encoding:
0
1
1
1
0
0
0
0
relative address
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