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- Structured flow
-
- z80a also has words that behave similarly to IF..THEN and
- BEGIN..UNTIL.
-
- On the IF side, we have IFZ, IFNZ, IFC, IFNC, and THEN,. When
- the opposite condition is met, a relative jump is made to
- THEN,'s PC. For example, if you have IFZ, a jump is made when
- Z is unset.
-
- On the BEGIN,..AGAIN, side, it's a bit different. You start
- with your BEGIN, instruction, and then later you issue a
- JRxx, instr followed by AGAIN,. Exactly like you would do
- with a label.
-
- (cont.)
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