Architectural Set Selection: The Prerequisite Choice for Assembly

Metadata

Field	Value
source	../Assembly-Fortran-Comparison.md
document	Comparative Strategic Analysis of Assembly and Modern Fortran: Pedagogical Yield, Toolchain Friction, and Industry Trajectories
kind	section-lead
parent
lines	96-109
findings	D01-m6

A developer who commits to learning assembly language must immediately resolve an architectural choice that does not exist in standardized high-level languages: selecting the target Instruction Set Architecture (ISA). Assembly is not a single unified language, but a family of low-level notations that map to specific hardware architectures2.

             Instruction Set Architecture (ISA) Tradeoffs

x86-64 Architecture AArch64 (ARM 64-bit) RISC-V Architecture
-—————— -—————–– -——————
- CISC Philosophy - Modern RISC Architecture - Open Standard Modular RISC
- Variable Encodings (1–15 Bytes) - Fixed 32-bit Encodings - Minimal ~40 Instruction Base
- Dominant Enterprise / Desktop - Dominant Mobile / Apple / Cloud - Clean Academic Design
- Decades of Architectural Baggage - Strict Load/Store Memory Model - Missing Arithmetic Flags
- Essential for Vulnerability Audits - High Contemporary Deployment - Specialized Emulation Setup

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ID	Severity	Evidence	Status	Location	Problem
D01-m6	minor	DOC	open	L30–44, L100–108	The ASCII diagrams render with escaped `\[` and `\-` characters. This is cosmetic.

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