Unconditional Jumps and Keyboard Input

Abstract

Execution of Z80 programs we have looked at so far proceeds sequentially through the instructions, one after another. However, it is possible and, in fact, usual to change the sequence of execution for one reason or another. Jump instructions allow the execution of a program to take different paths through the instructions. There are two types of jump instructions — unconditional and conditional. We will look at conditional jumps in the next chapter.