Comments on: Encoding Intel x86/IA-32 Assembler Instructions

By: Jose

Jose — Sat, 30 Aug 2008 15:57:35 +0000

You’re right, BaBax. I’m sorry for the mistake. I have corrected the encoding, and included a note recognizing your contribution.

Thank you very much.

By: BaBax

BaBax — Sat, 30 Aug 2008 13:16:24 +0000

It’s ok! Without the knowledge of assembler mnemonic it is
hard to understand what a “high-tech computer” is doing when
it is booted.
Good explanation!

By the way, there is an error in the part

———————————————————-
“which directly translates into the sequence of characters
(in hexadecimal):

0D 0A 68 65 6C 6C 6F 2C 20 77 6F 72 6C 64 110 21 0D 0A 24″
———————————————————-

The number 110 is the address of the byte 0×21 (the
character “!”) and doesn’t belong to the string.

The 0×110 is out of range of standard ASCII and the whole
string would look like “hello, worldÉ!” if you are using
Extended ASCII Codes. Furthermore, with the 0×110 the
whole string would be 19 characters long (as shown) and not
18.

By: Assembly language « CK Wong’s Microscopic Universe

Assembly language « CK Wong’s Microscopic Universe — Tue, 10 Jun 2008 04:16:22 +0000

[...] Encoding Intel x86/IA-32 Assembler Instructions [...]

By: hello world, C and GNU as | HALCODE

hello world, C and GNU as | HALCODE — Sun, 11 May 2008 15:45:47 +0000

[...] hello, world!. Next, we coded a hello, world! program by using the MS-DOS DEBUG program. Later, we encoded such program directly in hexadecimal (no need for DEBUG). And finally, we abused the MS-DOS ECHO command to create a binary, executable [...]

By: Writing Programs with Echo (DOS) | HALCODE

Writing Programs with Echo (DOS) | HALCODE — Sun, 04 May 2008 00:11:49 +0000

[...] binary, executable file. Is that useful? Surely not. But it’s a healthy way to waste your time. As suggested by a reader, this can be achieved by writing the characters of the executable file, using a simple text editor [...]

By: admin

admin — Sat, 03 May 2008 11:23:21 +0000

El ‘Carriage return’ del final realmente es prescindible. El programa termina después de ejecutar INT 21.

By: Mario Cantera

Mario Cantera — Mon, 28 Apr 2008 23:33:08 +0000

@El_Hombre_Que_Programaba: Cómo harás para introducir el 0D final en el archivo de texto?

By: meneame.net

meneame.net — Mon, 28 Apr 2008 21:31:55 +0000

Traducción de "hello, world!" a Código Binario…

Explicación concreta y clara sobre la traducción de un simple programa "hello, world!" (en ensamblador x86/IA-32) a código de máquina. Para nostálgicos….

By: admin

admin — Mon, 28 Apr 2008 21:20:05 +0000

Thanks everybody for dropping by, and thanks for your comments.

@El_Hombre_Que_Programaba: Aunque aún no estoy seguro, dudo que los próximos 2 o 3 artículos traten de ensamblador. Y lo expuesto en el artículo, en su mayoría, es de carácter general (no restringido a MS-DEBUG). La referencia a MS-DEBUG proviene del post anterior. Ahora, ciertamente usaré ‘GNU as’ en el futuro… y más ahora que Gas ha incluido soporte para la sintaxis Intel.

By: thehAllMark

thehAllMark — Mon, 28 Apr 2008 21:16:49 +0000

aaaggghhh… who needs assembly nowadays ?!