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Questions tagged [assembly]

An assembly language is a low-level programming language for a computer, microcontroller, or other programmable device, in which each statement corresponds to a single machine code instruction.

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Why does GNU AS use different characters for single-line comments depending on the architecture?

The GNU Assembler as uses different characters depending on the architecture to specify single-line comments, such as # on x86, ; on 29k, or @ on ARM. Moreover, regardless of platform, C-style ...
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IBM PC XT 5162 even and odd BIOS

I am writing a whole new BIOS, from scratch, for the 5162. The already existing BIOS is on chips U34 and U35. Normally, exactly one byte (the odd byte) should be on U34, followed by exactly one even ...
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How to manage dynamically generated variables in Assembly

Along the lines of How v8 JIT compiler manages dynamically changing variables, wondering how you would go about creating dynamically generated variables in assembly. Not necessarily looking for ...
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How does a .COM file get loaded for execution

For a bit of fun I thought I would start writing my own emulator for the 80286. I have been reading a bunch about the topic. I thought for simplicity I would start with a really simple COM executable ...
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Writing Z80 table based assembler/disassembler

I have a long-term project: DIY computer with various processors. One of my wishes not only make hardware, but software too. So I started from assembler/disassembler for Linux, though there is a lot ...