DR805X Datasheet, PDF (44/79 Pages) Digital Core Design – 8-bit RISC Microcontroller Instructions set details ver 3.10

DR805x Instructions set details
3.20. JNZ
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Instruction: JNZ rel
Function: 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:
2
Cycles:
3
Encoding:
01110000
relative address
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