Detailed Explanation of call and ret Instructions in Assembly Language

Detailed Explanation of call and ret Instructions in Assembly Language

ret and retf Instructions <span>call</span> and <span>ret</span> are transfer instructions that control the program flow by modifying the IP (Instruction Pointer) or simultaneously modifying both the CS (Code Segment Register) and IP. These instructions are typically used together to implement the design of subroutines (functions). ret Instruction <span>ret</span> (return) instruction pops data from the stack … Read more

Implementing Hexadecimal Display of Byte Data Using Lookup Tables in Assembly Language

Implementing Hexadecimal Display of Byte Data Using Lookup Tables in Assembly Language

1. Problem Analysis We need to write a subroutine that displays a given byte of data in hexadecimal format at the center of the screen. One byte should be represented by two hexadecimal characters, corresponding to the high 4 bits and low 4 bits of the value. Key Points: Separate the high 4 bits and … Read more