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361 questions
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I have recently started assembly programming and I have encountered an issue when assembling into an .exe file and then trying to run the program. For context, I use the FASM assembler, and I use ...
Jumpscare Myers's user avatar
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1 vote
3 answers
169 views

I am doing some basic tests in fasm I try to emulate a jump instruction in the reset location of 16 bit 8086 real mode: $ cat bios.asm ; BIOS ROM START (64 KB ROM) org 0xF0000 start: mov ah, 0x0E ...
M.E.'s user avatar
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1 vote
1 answer
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I am trying to write a sample “Hello World” in real mode that will run in QEMU. The host is a 64 bits intel running FreeBSD 14. I have tried the following: This is boot.asm file: format binary org ...
M.E.'s user avatar
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-1 votes
1 answer
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I try to find files with fasm version 1.73.32 , the source code can be found at this paste source code. The error comes with : Unexpected instruction 'else' at line 99. Any idea why this not work ? ...
Cătălin George Feștilă's user avatar
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0 votes
2 answers
130 views

I am using a typical x86-16 assembly random number generator, using the BIOS timer and the current milliseconds. random_number: mov ah, 00h ; interrupts to get system time int 1Ah ; CX:DX now ...
SGD's user avatar
  • 55
1 vote
1 answer
177 views

I am trying to write bootloader for hobby OS. I use FASM, genisoimage (via WSL) and VirtualBox. VBox shows "Guru Meditation" error and it`s only 'M' letter on display. Here is a screenshot: ...
Maksym Semenii's user avatar
  • 31
0 votes
1 answer
89 views

I have a part of code that compares 2 bytes in ax like one unicode UTF-8 symbol and converts it's to upper one, but amid Russian alphabet function doesn't work. ; first byte starts with 110 ; and ...
Alexandr's user avatar
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0 votes
1 answer
78 views

Calling any function from winmm.dll causes an exceptional error (0xc0000005). format PE64 GUI 5.0 entry start include 'win64a.inc' section '.code' code readable executable start: invoke ...
Memnon's user avatar
  • 1
1 vote
1 answer
239 views

Problem: I have computer science classes, we learn assembly using fasm, classes rely on win api, but i use linux so i've got approval to use external libraries. I've chose Raylib. Problem is that I ...
Bleb1k's user avatar
  • 17
1 vote
0 answers
83 views

nmap doesn't see socket ip(192.168.0.17) (assembly is fasm) i tried with little endian,but it doesnt work anyway. probably trouble in addr and port i wrote my code by help chromium os and i dont see ...
whateveron's user avatar
  • 11
0 votes
0 answers
106 views

Using FASM, x86_64, Linux (Mint) Passing args to C function int arg_test(int argc, char *argv[]) { // output number of args printf("arg count: %d\n", argc); printf("%s"...
IAbstract's user avatar
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4 votes
0 answers
126 views

I have assembled the (somewhat weird) instruction ADD EAX, DWORD PTR [RBP + RAX*1] with GCC, FASM and NASM. All of them produce the following suboptimal output 0: 03 44 05 00 add eax,...
NyxCode's user avatar
  • 808
1 vote
1 answer
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The problem is inside the Graphic subroutine at row 236. (4th, 13th and 16th row in sublabel .writePixel). In this subroutine I browse the graphic pixel from 280 to 487 column and 368 to 385 row. (...
user22969975's user avatar
  • 11
0 votes
1 answer
50 views

I have such a program in FASM assembler, I would like to make them capitalize when I enter the letters dfghjkl when I click the left shift and right shift at the same time, currently it works in such ...
FireX's user avatar
  • 1
1 vote
0 answers
90 views

output is not what was expected FASM BootLoader org 0x7c00 use16 org 0x7c00 message db "Hello!" len equ $ - message BootLoader: cli xor ax, ax mov ds, ax mov ...
hitokiri's user avatar
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