I believe 6502 instruction set is a good first assembly language

Original Article ↗ Hacker News Discussion ↗

6502 as a First Assembly Language

  • Many commenters report 6502 as their first assembly (often on Apple II, C64, NES) and find it approachable: few core registers, simple addressing modes, easy to hand-assemble, and runs on very simple systems without OS complexity.
  • Zero page is often described as a “pseudo-register file,” which, once understood, makes the ISA feel richer than the 3 visible general registers suggest.
  • Some praise how constraints (8‑bit arithmetic, no MUL/DIV, tiny stack) force you to understand multi-byte math, pointers, and low‑level behavior deeply.

Critiques of 6502 for Beginners

  • Others argue it’s a poor first ISA: highly idiosyncratic, pointer width > register width, heavy reliance on zero page, awkward stack, and patterns that don’t map well to modern CPUs.
  • Scaling beyond toy programs exposes pain points: manual management of global scratch bytes, difficulty with recursion, and hacks around the small stack.
  • Several note you spend disproportionate time fighting limitations rather than learning generally transferable assembly skills.

Alternative “First” Architectures

  • 6809 and 68000 are frequently suggested as more orthogonal, “C‑like,” and pleasant, with more registers and better addressing modes; PDP‑11 and Z80 also have strong advocates.
  • For modern relevance, many recommend RISC‑V or ARM (especially Cortex‑M / ARMv6‑M), citing clean load/store designs, toolchain support, and cheap hardware.
  • There is sharp disagreement on RISC‑V: some call it the best, simplest ISA; others criticize missing features (e.g., overflow flags, indexed addressing) as making real-world assembly harder.

Pedagogy, Context, and Motivation

  • Several emphasize that the platform matters as much as the ISA: simple 8‑bit micros or NES‑class machines make buses, memory-mapped I/O, and cycles easy to visualize.
  • Others prefer teaching assembly via modern compilers and disassembly (godbolt, objdump) on x86/ARM so students see directly how their usual languages map to machine code.
  • A common theme: assembly is most useful not as a primary language, but to build mental models of hardware, understand C/pointers, and reason about performance.