“Assembly Language” 3rd Edition by Wang Shuang Chapter 5 [BX] and loop instructions (Page 121) Experiment 4 Usage of [bx] and loop (1) Program to sequentially transfer data 0 to 63 (3FH) to memory 0:200~0:23F. (2) Program to sequentially transfer data 0 to 63 (3FH) to memory 0:200~0:23F. The program can only use 9 instructions, … Read more
“Assembly Language” 3rd Edition by Wang Shuang Chapter 4: The First Program (Page 94) Experiment 3: Programming, Compiling, Linking, and Debugging (1) Save the following program as t1.asm and generate the executable file t1.exe. assume cs:codeseg codeseg segment mov ax, 2000H mov ss, ax mov sp, 0 add sp, 10 pop ax pop bx push … Read more
Llicense [ˈlaɪsəns] n. license, permit lid [lɪd] n. lidlie (lay, lain) [laɪ] v. lie; to be situated; n. & vi. lie; to tell a lielife (复lives) [laɪf] n. life; career; living; human life; organism lifetime [ˈlaɪftaɪm] n. lifetime, duration of life lift [lɪft] v. to lift, raise; (clouds, smoke, etc.) to disperse; n. (British) elevator … Read more
\ Microcontroller Assembly Language Programming 1. Write a program to implement the logical function “P1.4 = P1.0 ∨ (P1.1 ∧ P1.2) ∨ P1.3” using bit manipulation instructions. MOV C,P1.1 ANL C,P1.2 ORL C,P1.0 ORL C,P1.3 MOV P1.4,C 2. Write a program that jumps to the LABLE storage unit if the content of accumulator A meets … Read more
“Assembly Language”, 3rd Edition by Wang Shuang Chapter 13: int Instruction Checkpoint 13.2 (Page 259) Determine the correctness of the following statements: (1) We can programmatically change the instruction at FFFF:0 so that the CPU does not execute the hardware system checks and initialization program in the BIOS. (2) The int 19H interrupt routine can … Read more
“Assembly Language”, 3rd Edition by Wang Shuang Chapter 9: Principles of Transfer Instructions Checkpoint 9.3 (Page 185) Complete the program to use the loop instruction to find the first byte with a value of 0 in the memory segment 2000H, and store its offset address in dx after finding it. assume cs:codecode segment start: mov … Read more
“Assembly Language”, 3rd Edition by Wang Shuang Chapter 10: CALL and RET Instructions Checkpoint 10.1 (Page 191) Complete the program to execute instructions starting from memory address 1000:0000. assume cs:codestack segment db 16 dup(0)stack endscode segment start: mov ax, stack mov ss, ax mov sp, 16 mov ax, ______ push ax mov ax, ______ push … Read more
“Assembly Language”, 3rd Edition by Wang Shuang Chapter 10: CALL and RET Instructions Checkpoint 10.2 (Page 192) What is the value in ax after executing the following program? Memory Address Machine Code Assembly Instruction 1000:0 b8 00 00 mov ax, 0 1000:3 e8 01 00 call s 1000:6 40 inc ax 1000:7 58 s: pop … Read more
![Assembly Language: Understanding the [BX] Register and Loop Instructions](https://boardor.com/wp-content/uploads/2025/10/8e4a8191-ad29-4c55-a265-2fb9987258d4.jpg)
This series will explain the book “Assembly Language”. This section covers Chapter 5 – **[BX] Register and Loop Instructions**. In this section, we introduce another way to describe memory, the [BX] register, and the commonly used loop instruction: loop, discussing its applications, significance, and related content. The entire text uses (ax) to represent the contents … Read more
Traditional C Language Foundation of Windows Kernel The Windows kernel has traditionally been developed primarily in C, which is reflected in disassembly as follows: ; Typical C-style kernel function disassembly example KiSystemCall64: swapgs ; Switch kernel GS register mov gs:[10h], rsp ; Save user-mode RSP mov rsp, gs:[1A8h] ; Load kernel stack pointer push 2Bh … Read more