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haunted_house_disassembly's Introduction

Haunted House Commented Disassembly

Reverse-engineering and disassembly of the Atari 2600 game Haunted House designed by James Andreasen, the original survival horror game. This is a work in progress. The disassembled and commented code is in haunted.asm. I would appreciate any tips or advice anyone may have as a PR or Issue.

Haunted House

Building/Playing the ROM

I'm using DASM. You can build the ROM by running make and you'll get a ROM, haunted.bin. This can be played using the Stella 2600 emulator.

If you don't have make, the correct DASM command to build the ROM is:

dasm haunted.asm -ohaunted.bin -f3

Sprites

The ghost of old man Zachary Graves:

█ ███
██ █ █
 ██████
 █████ █
 █████
  ████
    ██

The urn you need to win the game and the pieces which make it:

  ████        ████
   ██          ██
  ████      █  ██   █
████████  ████  █   ███
█ ████ █  █ █  ██   ██
████████  ███  █   ████
  ████        ████
   ██          ██

The bats flying around:

█      █   ████
█      █  ██████
██    ██  ██  ██
 ██  ██  ██    ██
 ██████  █      █
  ████   █      █

Some spiders (swaps between these two when moving):

  █  █
  █  █    ███  ███
  █  █       ██
█  ██  █   ██████
 ██████   █  ██  █
   ██       █  █
 ██  ██    █    █
█      █   █    █

Key to unlock doors:

     ███
██████ █
█ █  ███

The bitmap font numbers (they're actually inverted in the code):

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██  ██
██   ██
███  ██
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     ██
██  ██
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  ████
 ██  ██
 ███  ██
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██  ████
██    ██
 ██  ███
  █████


 ███████
██    ██
     ██
     ██
    ██
    ██
   ██
  ████


  ████
 ██  ██
██  ███
██
██████
██  ███
███  ██
 █████


  █████
 ███
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     ██
 ██  ██
██  ███
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     ███
███  ██
 ██  ██
 ██  ██
██   ██
████████
     ██
    ████


  ████
 ██  ██
    ███
   ██
    ██
 ██  ██
██  ███
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 █████
██  ███
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     ██
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██
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   ██
  ███
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   ██
   ██
  ███
 █████


  ███
 █████
██  ███
██   ██
██   ██
███  ██
 █████
  ███

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