x86-16

问题 I need to solve the problem below, but I don't understand the concepts needed for solution. Let's consider the following string of doublewords: B234* A68C *h, * 52B4 *78C8h, * 1AB3 *C470h, F9DC* 98B6 *h. It is required to: 1) print on the screen the words ' ranks that have the minimum value from each doubleword (considering them unsigned ) The answer is '2112' (the bold words have the minimum value) 2) print on the screen the sum of the bytes that have the maximum value from these words

问题 I have just started to read about intel 8086 and have a question concerning its memory. I read that the address bus is 20-bit wide, which means the address space is 1MB, and this space is divided into segments. the question is: the four segment registers, CS , DS , SS and ES , are they read only or I can set their values, and which are their default values? I saw the following assembly tutorial: ORG 100h MOV AX, 0B800h ; set AX = B800h (VGA memory). MOV DS, AX ; copy value of AX to DS. MOV CL

问题 I have this assembly program where I need to find the substring in the main string I input. My problem is that it always outputs the "word found" even if I typed two completely different words. I don't know which part of my loop or condition is wrong. Please help me figure it out. Also, please suggest some string instructions that could be used in checking for a substring so that I can shorten my code. I am really confused with how the cmpsb works, I only tried to use it. Btw, I don't know

问题 I'm working with interrupts and I'm facing this problem while running my code: DATA SEGMENT INPUTV DW 0035H, 0855H, 2011H, 1359H OUTPUTV DB 4 DUP(0) DIVIDER DB 09 ERROR_FLAG DB 0 DATA ENDS _STACK SEGMENT STACK DW 100 DUP(0) TOP_STACK LABEL WORD _STACK ENDS CODE SEGMENT ASSUME CS:CODE, DS:DATA, SS:_STACK MAIN: MOV AX, _STACK MOV SS, AX MOV SP, OFFSET TOP_STACK MOV AX, DATA MOV DS, AX MOV AX, 0000H MOV ES, AX MOV WORD PTR ES:0002, SEG INT_PROC ;PUSHING CS TO STACK MOV WORD PTR ES:0000, OFFSET

问题 I'm working with interrupts and I'm facing this problem while running my code: DATA SEGMENT INPUTV DW 0035H, 0855H, 2011H, 1359H OUTPUTV DB 4 DUP(0) DIVIDER DB 09 ERROR_FLAG DB 0 DATA ENDS _STACK SEGMENT STACK DW 100 DUP(0) TOP_STACK LABEL WORD _STACK ENDS CODE SEGMENT ASSUME CS:CODE, DS:DATA, SS:_STACK MAIN: MOV AX, _STACK MOV SS, AX MOV SP, OFFSET TOP_STACK MOV AX, DATA MOV DS, AX MOV AX, 0000H MOV ES, AX MOV WORD PTR ES:0002, SEG INT_PROC ;PUSHING CS TO STACK MOV WORD PTR ES:0000, OFFSET

问题 I'm trying to compile and link a simple program to a DOS .com file using Turbo C compiler and linker. By that I try the simplest C-program I can think of. void main() {} Are there command line arguments to link to com files in the Turbo C Linker? The Error Message I get from the Linker is the following: "Fatal: Cannot generate COM file: invalid entry point address" I know that com files need entry point to be at 100h. Does Turbo C have an option to set this address? 回答1: It has been a long

问题 I'm trying to compile and link a simple program to a DOS .com file using Turbo C compiler and linker. By that I try the simplest C-program I can think of. void main() {} Are there command line arguments to link to com files in the Turbo C Linker? The Error Message I get from the Linker is the following: "Fatal: Cannot generate COM file: invalid entry point address" I know that com files need entry point to be at 100h. Does Turbo C have an option to set this address? 回答1: It has been a long

问题 I am developing my Operating System. I got error on booting my OS. The error was: KERNEL.BIN not found! Here are the Codes: Boot.asm ; The Aqua_Seven_OS Operating System bootloader ; ================================================================== BITS 16 jmp short bootloader_start ; Jump past disk description section nop ; Pad out before disk description ; ------------------------------------------------------------------ ; Disk description table, to make it a valid floppy ; Note: some of

问题 I participate in the competition named 'Code guru - Extreme' In this competition there is safes and keys in assembly 8086. To a safe and a key there are joint data segment, and you need to make a key that break the safe. Example to safe: L: mov ax, [1234] cmp ax, 5678 jne L Example to key that break the safe L: mov ax, 5678 mov [1234], ax jne L And now I have a safe that I can not break it and al, 0FEh push ax clc mul ax xor ax, dx or al, 1 loc_10A: sub [0A2h], ax pop ax push ax jnz loc_10A

问题 I participate in the competition named 'Code guru - Extreme' In this competition there is safes and keys in assembly 8086. To a safe and a key there are joint data segment, and you need to make a key that break the safe. Example to safe: L: mov ax, [1234] cmp ax, 5678 jne L Example to key that break the safe L: mov ax, 5678 mov [1234], ax jne L And now I have a safe that I can not break it and al, 0FEh push ax clc mul ax xor ax, dx or al, 1 loc_10A: sub [0A2h], ax pop ax push ax jnz loc_10A