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Questions tagged [tasm]

Turbo Assembler is an x86 assembler by Borland

Turbo Assembler is an x86 assembler by Borland.

833 questions
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10 answers

How many ways to set a register to zero?

I'm curious how many ways are there to set a register to zero in x86 assembly. Using one instruction. Someone told me that he managed to find at least 10 ways to do it. The ones I can think of are: xor ax,ax mov ax, 0 and ax, 0
user173973
26
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3 answers

How to generate a nasm compilable assembly code from c source code on Linux?

Test platform is 32 bit Linux. Basically, I know gcc can be used to generate both Intel and At&T style assembly code, but it seems that you can not directly use nasm/tasm to compile the Intel style assembly code gcc generated. I am conducting a…
lllllllllllll
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Difference between lea and offset

ar db "Defference $" What's the difference between mov dx,offset ar and lea dx,ar I think both are doing same work, but what is the difference between these two
userBI
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3 answers

What does `dup (?)` mean in TASM?

I have this code here, but I'm unfamiliar with the syntax. STACK16_SIZE = 100h stack16 db STACK16_SIZE dup (?) I think dup means we declare a variable of type array, as this is a stack, but I'm not sure. So what does dup mean…
sashoalm
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3 answers

I don't understand how to use Interrupt 21, AH=0ah

My information is coming from here. The assignment asks for a program that reads in no more than 20 characters, converts those characters to upper case, and then prints the input as capitals. I have no idea how to access the input from…
user1707505
9
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1 answer

Assembly, the meaning behind the colon ":"

I'm new to assembly and I'm currently reading a guide that would frequently express things like ax:bx, ds:dx, ss:sp. I'll use one of the above in an example from the book "Mastering Turbo Assembly" Page 85. Notice that the logical address in ss:sp…
Wobit Nyen
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1 answer

Using 3Dh causes interrupt to only return "Acces Denied"

Configuration : MS-DOS 16 BIT (writing in a .asm file, then compiling them with TASM and TLINK) Windows 7 x64 I've made a simple program in Assembly that should only OPEN a file and write a text to it. Here is the code to it: assume cs:code,…
SnuKies
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7
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2 answers

How to pass/retrieve DOS command-line parameters in a 16-bit assembly program?

I am writing some little tools for MS-DOS. Now I'm writing a Shutdown.com, like for Windows XP and greater. I have already written the entire code, now I just need to pass the argument from DOS. I need to pass the parameters "-r" to reboot and "-s"…
MendaxRox
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1 answer

Weird Macros (TASM)

Consider the following macros: pixelFast MACRO ; This macro draws a pixel, assuming the coordinates are already loaded in cx&dx and the color is in al. xor bh, bh mov ah, 0ch int 10h ENDM drawRect MACRO x1, y1, x2, y2, color …
Itamar
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2 answers

Assembly difference between TASM and MASM

I am learning TASM at University, but information regarding TASM on the web seems to be very limited. I have found more information on MASM. My question is, what is the different between MASM and TASM?
Wizard
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6
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1 answer

8086 assembly on DOSBox: Bug with idiv instruction?

I was helping a friend of mine debug his program, and we narrowed it down to an issue which occurs even here: .MODEL small .STACK 16 .CODE start: mov ax, 044c0h mov bl, 85 idiv bl exit: mov ax, 4c00h int 21h end start After…
eequinox
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1 answer

Why isn't my code working when adding .386?

As explained in the title, I need to make this code able to do the same things it do using just 16bit but adding .386 to the code so I can use 32bit registers. But when I add the .386 now my code isn't printing anything, any idea how I can fix this.…
Diego Esquivel
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5
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1 answer

Calling procedures from another file

I have an .ASM file in which I want to call procedures from another .ASM or .INC file. I have tried writing the following into my main.asm file: INCLUDE file_op.inc However when I try to run it, it just says: 'the emulator is halted.' It does…
Michael Kročka
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2 answers

How to know if an assembly code has particular syntax (emu8086, NASM, TASM, ...)?

I want to know how,by looking through a sample source code, recognise if the syntax used is em8086, TASM or NASM? I am a new to assembly..I would like to know more about emu8086 please.
user6473027
5
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1 answer

What does ASSUME mean in assembler?

Everywhere it is explained as a thing which binds/associates registers with segments, but I want to understand what is bound exactly.
Dmitriy Nalivajko
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