# 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.

- Type: Case study
- Targets: Game
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-09
- Added to the catalog: 2026-11-10
- Original resource: <https://www.qotile.net/minidig/disassembly/surround.asm>
- Primary source: <https://web.archive.org/web/20260213080708/https://www.qotile.net/minidig/disassembly/surround.asm>
- Catalog page: <https://awesomerea.org/resources/surround-atari-vcs-disassembly-case/>
- Record JSON: <https://awesomerea.org/resources/surround-atari-vcs-disassembly-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/surround-atari-vcs-disassembly-case/index.md)

## Requirements & limits

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

## Primary sources

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

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## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.