DR805X Datasheet, PDF (45/79 Pages) Digital Core Design – 8-bit RISC Microcontroller Instructions set details ver 3.10

DR805x Instructions set details
3.21. JZ
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Instruction: JZ rel
Function: Jump if accumulator is zero
Description:
If all bits of the accumulator are zero, branch to the address indicated;
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:
01100000
relative address
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