[assembly] Forum Topics

Hello all. This is a quick question. I have learned quite a bit of assembly so far. One thing confused me though. Why would one push a register with nothing in it . for example push eax I have see this happen in code even when nothing has been moved …

Hello, I'm writing a compiler in C++ which generates x86 assembly code. I'm using masm32 to test generated code. I don't really know assembly, I have to look up a lot of things while writing code. My problem is that when I generate the code for a division, like 4/2 …

Hey everyone. I'm using GAS assembler (AT&T syntax) under linux, and I'm trying to make a function that converts a string of numbers to an integer. I thought I had everything nailed down, but when I created a simple test program to test out the function, it caused a segmentation …

hello i have a problem in assembly how i can disply and refresh time on VGA buffer, on 0b800h

How to create an assembly program that will allow the user to enter somer characters and group the characters according to the following: alphabets, numbers, and special characters. ASAP. thanks.

sorry to post this stupid question here. I'm just learning Assembler and a problem from my book is: input: a string from a user. output:character in that string. for example: input: DANI so output is: D A N I I just can received a string from user. thanks. :)

Why there are two ground pins in 8086 Micrprocessor ?

Hi, I started writing a small kernel code that prints a character when it is loaded by my bootloader wriiten in assembly. Everything worked fine till i was printing a character. But when i tried putting function calls in my c code the computer reboots, no idea why!!. I'm using …

Hi I am trying to compute the modulus of two numbers in assembly code. As I am more fluent in C++ it is hard for me to understand the concept of modulus as all I use is the symbol % to compute. The problem I am doing is computing the …

Hello everyone! For the last week I've been trying to convert an EXE file into a DLL. I read about 1000 Google pages on the way and now know much more than in the beginning :) I have nearly succeeded in getting the "DLL" to run but there is one …

Hi Guys (and gals), Thanks for taking the time to read this, hope someone can help. I've been tasked with developing an anti-virus scanner as part of a university assignment. I've written all the signature matching code, which works fine, and the software can scan through a directory and find …

Please let me know how to install nasm in ubuntu? And later how to write a assembly code in it and compile and run it. Please help. I tried using ./configure to install it, but it didn't work.

First, I'd like to say that this IS a school project. I'm not going to try to hide that. Anyway, I was provided with this c++ code: [CODE] #include <iostream> using namespace std; //----Prototypes------------------------------------------------------ void CmpTest( char *buffer1, char *buffer2, int size ); int MemCmp( char* mem1, char* mem2, int …

I am writing a code for adding a series of 8 bit numbers. But it is displaying absurd characters in output. What may be the error ? [CODE] ASSUME cs:code, ds:data data segment LIST db 23H, 46H ,02H,12H COUNT EQU 04d ;RESULT DB 01h DUP(?) data ENDS code segment start: …

Why in a code fragment like the following we need to append a zero before a-f ? Is there any reason behind this or is this a convention for signed numbers ? [code] list dw 0a876h,4567h,0b234h [/code]

I'm trying to program a simple traffic light control using a 8051 micro-controller and assembly language. I use the Multisim application for simulation purposes. I'm having a problem with the timers. I want the red and green lights to be on for 10 seconds and the yellow ones for 2 …

I have discovered a bug in some assembly code I have been working with but can't figure how to fix it. When shifting left by 0 the result ends up being 0 instead of jut the number. The same applies when shifting to the right. Any and all help is …

Hello, I have got an assignment to modify an existing ISR. Can someone guide me how to do so? It is to write an assembly program that exploid an existing ISR and modify it. Thanx

Hello everyone I am working on a secruity program Demo. The program should allow the user to enter a message, one character at a time. The program should then display the corresponding digit or punctuation according to the ASCII character set. For example, if the user enters the letter a, …

Hello need help. Maybe you can make the in assembler that the temperature in ° C to convert ° F temperature units. This translation is carried out according to the formula (° C × 9 / 5) + 32 = ° F. I need all program code. Thank you. BR …

Can I write IL programs run directly? exam for the IL program what is business process model in UML?

So I'm trying to write a program that will display a grade depending on the user's input i.e. 90-100 (A) 80-89 (B) 70-79 (C) 60-69 (D) 59 below (F) this is what I have so far but I don't know what I'm doing wrong. :\ It assembles and it'll let …

i have this code i have to translate it to machine code assembly language and this is really confusing i have to right [CODE] x = 8 y = 12 if(x > y) x = y - x else x = x - y and int x = -5 int …

Hi, i'm currently learning assembly with the nasm assembler and i'm stuck trying to get a memory address into a register. Here is what I have: [code][bits 32] [org 100h] section .data msg db "Hello", 0 section .text mov si, [msg] ;lea si, [msg] ret[/code] I read the nasm manual …

Here's the program I wrote not using a procedure: [CODE] .data target BYTE "aabccdeef", 0 freqTable BYTE 256 DUP(0) space BYTE " ", 0 .code main PROC mov edi, OFFSET target mov esi, OFFSET freqTable mov ecx, LENGTHOF target mov eax, 0 L1: mov al, [edi] movzx eax, al mov …

Hello i have some brief questions about loading functions from a dll. Im having problems understanding the difference between a function adress and a function hash. For example i know that when i open up kernel32.dll in a dll export viewer. The function address of loadlibrarya is ox7dd774bc6 and then …

I'm not sure exactly what I'm looking for or whether it exists, but I was hoping to get any ideas from the assembly experts here. I do know basic x86 and ARM assembly from classes but have not used them much in "real life." Ideally, what I would like is …

Hi, I'm trying to use the 8-bit result from an ADC to make a time delay. It is working except that time delay is only increasing after the input goes above 2.5V. The input is 0V to 5V from a 1k POT. Any ideas why it would not start working …

I'm having some trouble translating the following C++ program to Pep/8 assembly language. Can anyone help me solve this. This is what I have come up with. [code=cplusplus] #include <iostream> using namespace std; int list[16]; int i, numItems; int temp; int main() { cin >> numItems; for (i = 0; …

[ ] I've got a working bootloader. Now I need to learn how to pass control from that bootloader to... Well, I'm really not sure how to do that. [ ] Once I have passed control out of the bootloader. How do I access the graphics driver? [ ] How …

I am taking a class on assembly language for intel based computers and for our final project we need to develop a simple game in assembly. For my project I need to make the console window bigger. I looked in the textbook and i cant find anything about resizing the …

Hi, I have a circuit that charges a capacitor and discharges it. The length of the discharge pulse is supposed to be determined by the ADC value from a POT. The pot is wired as a voltage divider and I have tested that the voltage to the pic pin varies …

Hi guys, I'm new here I just started learning assembly and tomorrow I have an exam and I have a problem with a task. I can't find code for division and I module, so I have this task, if you can pls write me the code: Write a code for …

hi, can i know what is assembly versioning? thank you

I'm working with a HCS12 Motorola chip trying to make a MIDI player. Got stuck on the function of play/pause/forward/back. These are controlled by external switches set to high and low. Below is my attempted switch settings: [CODE]switches LDD $0000 CPD #$0001;"pause" button BNE AFTER_1 PAUSED LDD $0000 CPD #$0002; …

Hi, i'm trying to learn some assembly, ive got a assignment from school to control a lcd screen. I've got some sample code that i mostly understand but i can't figure out what the SBI command does. Using atmega32, with avr studio 4 [CODE]sbi PortD, LCD_E[/CODE] At this point PortD …

I'm learning assembly and just finished coding the n-queens problem in nasm. The n-queens problems consists of placing n queens on a nxn chessboard so that no two queens are in the same row, column or diagonal (so that no queen could take another). For years, this is the first …

HI,, i wanna ask you about MIPS is there MOV instruction in MIPS?if not, why doesnt support it. thanks,,,

Hi all, I thought I would do the right thing and introduce myself. My name is Martin, I am getting old in the tooth at 42 and thoroughly enjoying the process. I like a wide range of music, from pop to classical but do enjoy a bit of JAM and …

Actually these are Some of Interviews Questions that i have to answer in an interview. I have got Some Confusion :-/ in My answers that why posting here .. So that Any Genius Can Answer these Question Correctly 1) Which of the following are true about Extension methods? 1) They …

Hi everyone, I'm really, really confused with the whole CHS thing. Here's what I understand so far... INT13, function 8 can get me the following drive parameters:- Heads Cylinders Sectors-per-Track I can use the following calculations to get the disk space:- Sectors-per-Side = Sectors-per-Track * Cylinders Total Sectors = Sectors-per-Side …

hi to all.. could someone help me how to write a code in a86 assembly language? only 30 seconds coundown. i haved my code but it doesn't work. thanks..!![code][/code]

hi folks, I have a big C# component, which has reference to many other .dll's. I am facing a strange kind of problem when I compile my code or in between all folders in my /bin/debug directory get deleted automatically. So I get an error saying reference not found for …

Hi folks, I'm creating a bootloader for my setup CD in NASM, and so far I've got the PVD (Primary Volume Descriptor) stored in a buffer. Now I'm stuck, as I'm not sure exactly how the Directory Records .etc. are structured; how is the one-to-many relationship implemented .etc. as it …

hi, all, Glad to see you guys here. It's Greeting from China mainland. Do you mind my introducing myself? I'm a switch driver engineer. I'm interesting in bios, firmware development using assembly and c language respectively. Say hi to you guys again.

Hi, I v got a tough challenge to solve please help me find its solution. Have code but no corresponding higher language code. Code displays 8 top records made by any users in a particular game, i have to modify it in such a way that it prints 10 records. …

Is there a difference between %ecx and (%ecx) I don't really care at this point about specific register uses, just consider %ecx a general purpose register for my question. I know that if you have a base pointer (%ebp) and you want to reference a location based on that, you …

Hi guys, I am a [COLOR="red"]newbie[/COLOR] in writing programs in assembly language. Can anyone teach me how to write a simple code to develop a basic graphic user interface. I am currently working on a project to create a musical game that requires user interaction. Your assistance is greatly appreciated. …

Hereby the code i have wrote about a small porgram to to find the maximum number from three numbers. Waiting your comments,,, GET AX; MOV BX,AS; GET AX; MOV CX, AX; GET AX; CMP AX,BX; CMP AX,CX Put AX End

Hi there, I am having some trouble compiling what I believe to be unmanaged code (output from monodis) back into C# for analysis. What is the correct procedure or program to use for this? Thanks. PS. I don’t know whether it would help at all, but the output begins like …