Questions tagged [x86-family]

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2
votes
9answers
368 views

Is the program 32 or 64 bits?

Assignment is simple to explain: write the shortest code you need to determine whether an executable binary program supplied as parameter is 32 or 64 bits. If there is a different kind of bitness, ...
20
votes
1answer
842 views

Bootloader golf: Brainf***

Create a bootloader that executes given Brainfuck program. This is code-golf, so the program with least bytes wins. Being a bootloader, the size of the program is counted in non-zero bytes in the ...
8
votes
2answers
970 views

Build the busiest beaver in x86 machine code in 32 bytes or less

Your task is to write a program in x86 machine language (any version you like) that will run through as many instructions as possible and then halt, using a maximum of 32 bytes of code and starting ...
14
votes
4answers
822 views

Branch differently in x86 / x86-64 using only printable visible ASCII characters in the machine code

The task is simple: write a program that branches differently in x86 (32-bit) and x86-64 (64-bit) using only printable visible ASCII characters 0x21...0x7e (space and del are not allowed) in the ...