Case study

Surround: an annotated Atari VCS disassembly that compiles to the exact 2K ROM

Atari's 1977 VCS game Surround is disassembled into labeled and commented 6502 assembly that compiles to the exact 2K ROM image. The listing names the zero-page variables, the game-variation flags for speed-up, wraparound, erase, diagonal movement and single-player play, the joystick and switch masks, and the score and playfield drawing routines, with a compile switch for NTSC or PAL builds.

Targets: Game
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-09
Evidence class: C3 notes only

Copy as Markdown View JSON Cite

Evidence

Observed: No code found behind the entry URL.
Scope: Notes
Checked: 2026-11-10

How evidence classes are assigned

Requirements & limits

Prerequisites: Assembling needs a 6502 assembler and vcs.h version 105 or later.
License: No licence stated on the project page.

Cite

BibTeX

@misc{surround-atari-vcs-disassembly-case,
  title = {{Surround: an annotated Atari VCS disassembly that compiles to the exact 2K ROM}},
  howpublished = {\url{https://www.qotile.net/minidig/disassembly/surround.asm}},
  url = {https://www.qotile.net/minidig/disassembly/surround.asm},
  urldate = {2026-11-09},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/surround-atari-vcs-disassembly-case/}}
}

Plain text

Surround: an annotated Atari VCS disassembly that compiles to the exact 2K ROM. https://www.qotile.net/minidig/disassembly/surround.asm (accessed 2026-11-09). Awesome REA entry: https://awesomerea.org/resources/surround-atari-vcs-disassembly-case/

Useful? Star Awesome REA on GitHub2.4k

About this entry

The description was reviewed against primary sources.

Report an outdated entry Suggest a translation fix

Primary sources

https://web.archive.org/web/20260213080708/https://www.qotile.net/minidig/disassembly/surround.asm