2,879 Topics
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| | Hello, I am learning ia-32 assembly. I have observed that when creating an object file using gcc from the simple c program: [CODE]main () { char buf[256]; write(1, buf, 256); } [/CODE] it generates the following instruction for the write: (using the data on top of the stack for the … |
| | Hello all, i am new here and this is my first post. I am a n00b in this case, and really don't know how to do it. so it would be great if u kindly show me the right way to do it. For instance the following instructions provides wrong … |
| | Hello, Is there a reference anywhere that I can find out the number of cycles each instruction takes for ia-32 processors? I do not find this information in the docs, neither has much googling come up with anything. Thanks, Allasso |
| | In the name of God... ------------- Hi every one. I Have to Files : Main.asm Procs.asm ------------------------------- In Main.asm I have written: [CODE]extrn INCHAR:Far,OUTCHAR:Far[/CODE] And in Procs.asm I have written: [CODE]public INCHAR:Far,OUTCHAR:Far MyProcs Segment Assume CS:MyProcs[/CODE] ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; I am sure that there is No syntax Error in both source files. …  |
 | [CODE] BITS 16 start: mov ax, 07C0h ; Set up 4K stack space after this bootloader add ax, 288 ; (4096 + 512) / 16 bytes per paragraph mov ss, ax mov sp, 4096 mov ax, 07C0h ; Set data segment to where we're loaded mov ds, ax mov si, … |
| | I would like to know, because I noticed how slow it can be when called over and over. How would I go about doing [CODE]xor ah,ah int 0x16[/CODE] Without the interrupt? [URL="http://www.youtube.com/watch?v=ZKFY0OivbwE"]Here's a link to my video.. can see small delays keys are pressed quickly or held in near the … |
| | Hello, im a bit confused about ASM, i just have a code, i want to add inside it some new instruction, but there isnt enough space for it.... how can i jump to the end of the app and execute it and jump back? is it possible? i got: [CODE]000001: … |
| | Hi folks, I just want to be certain on a few things before I continue developing my software (using NASM). I know it seems a bit strange to finally understand addressing AFTER I've already developed a bootstrap loader, but that's the way it's happened!!! :$ I'm currently working in 16-bit … |
| | Hello i am trying to mask the interrupt for the system timer in my pc, using the 21H adress (Interrupt Mask Register) as adress, and sending the OCW1. However, on none of the computers i ve tried it did work (AMD K6, Pentium 1, AMD Athlon 1400), although they are … |
| | hi , Code calculator in error, please help resolve this error. I compile code calculator emu8086 I'll error on line 71. The second question: this calculator in 10 base worked. How can the numbers in binary form as the input received and as output . to download emu8086 http://www.emu8086.com tnx … |
| | Hi, I am looking to find 3 and 5 digit characters convert into hex byte or word. For example 69 string represents 69 decimal and 45 hex. Then '6' = 36h and '9'= 39h. 43690 = AAAA example. I need done it in Freescale (motorola) assembly for my communication machine … |
| | Hi A calculator that I wanted to assembly language into binary numbers (hexadecimal) as the input received. This sum calculator "+" multiplication "*" into "/"and subtraction "-" to do. I also need the program source. I'm grateful too to download source put Thank you very much |
| | Hello all, I am writing a WPF application and used pages for navigation, The thing I want to know is that , [B] [COLOR="Red"][COLOR="red"]How can I get the Relative Uri`s of pages from the assembly dynamically[/COLOR][/COLOR][/B]. I don`t know what to do with this. I know how to get a … |
| | If you are an operating system developer and using bochs as your simulator, you will love it. [URL="http://code.google.com/p/peter-bochs/"]http://code.google.com/p/peter-bochs/[/URL] |
| | Hello, I have broadened my question posted yesterday. I would like to know how to approach writing system functions such as open, write, read, etc, without using syscall. I am using GCC. eg, I can call these functions using c, yet I understand that the compiler uses functions from a … |
| | C-programming --> Assembly code I have been busting my *** with this, its very simple for someone who has experience they likely wouldnt even bother coding it out. I'm posting my code.. [CODE]#include <stdio.h> int main(void) { int led[4] = {0}; int ledSwitch[3] = {0}; int value = 0; while(value … |
| | In the name of God . Hi every one . I have started to learn x86 assembly . I am going to define[COLOR="Green"] array of 70000 bytes[/COLOR] . Which it gives me failure by using command below : [CODE]arr db 70000 dup(0)[/CODE] ------------------------------- ASSEMBLER :< MASM > OS :Windows ---------------------------- … |
| | Hello, I have been trying to learn assembly code for PPC on a Mac OS 10.5. I have wanted to see how, when compiling a c program, GCC uses libraries on the Mac to insert instructions to perform functions such as malloc(), write() and printf() in a way that is … |
| | I'm a newbie in assembly Google search was not helping much can some1 tell me how to write %2 in assembly? ps. there might be more question coming up since I'm trying to finish my HW |
| | An instance of pivot computation: Kindly give me your advice, please. And now, let me hear more about the problem of asm expert. Deviation_ratio PROC USES eax ebx ecx ; assumed that GENERATES deviation ratio VALUES and STORES in an ARRAY. ; RECEIVES: ESI POINTS to the ARRAY, ECX = … |
| | can anyone tel me if doing some games in tasm assembler possible? if yes can someone give some tutorials on how.. and any idea will be much appreciated to start doing some |
 | Please help on creating my own operating system ............. I try too much to search on google but I did not get any help for me.......... I hope some good enough too help.... I have knowledge about c/c++. Thanks. |
| | Hey, I have a very basic question regarding the stack in x86 assembly. If I’m correct the main operations on the stack are push and pop (I know there are others). Next to this the stack will grow (keep the location) when the program goes to a subroutine (call) and … |
| | In the name of God. hi everyone . I am going to code a program which get chars and print '*' character instead . ----------------- Here is Code : [B][I][COLOR="Red"]Now the problem is here : How can I Show the typed password ?[/COLOR][/I][/B] [CODE] ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;Purpose : Reads a String … |
| | In the name of God Hi . I have wrote an assembly source code which draw lines . Put when I compile it to an exe file , the exe file gives me an error : The System Doesn't support fullscreen mode . My OS : Windows Seven 32 Bit … |
| | PLEASE somebody help me I have QUESTIONS about pep/8 and 4 hours left to figure it out 1. in C++, global variable CHAR word[32] = "Backward"; is common but how do i initialize it in pep/8 ?? I need to write a simple program to flip it backward using stack … |
| | output of asm <--- the output should be clear("no other words") and only menu,password can be seen before typing the password menu password:__________ <----- when typing the password it should be in asterisk "access denied"/granted <---- it will appear if the password is wrong or right codes that i create … |
| | Hi! I'm wondering how to perform: "To read and write call interrupts using instruction int (e.g. int 10h)." (in nasm x86) for example: [CODE] bits 32 extern _printf, _scanf global _main section .data message db "Hello!", 10, 0 section .text _main: pushad push dword message call _printf <--- how to? … |
| | Hello, im tying to complete a project here. but before i begin, i need to finish some basic problems. i just want to make sure i have this correct before i continue. 1. Declare an array named 'array1' consisting of the four elements {1, 2, 3, 4}, each as 2 … |
| | Hello, i have problem at address: 0x0040E0D6 mov eax,dword ptr [ecx] the solution would be to place an instruction to check if ecx is 0 and finishing this function, but how to do this? Thx! |
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