2019-03-09 20:30:57 +00:00
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# Anti-M
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Boot ROM-limited games on any Apple II.
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## What is this?
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Many early Apple II games only worked on the original Apple II or Apple ][+.
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They refuse to boot on later models, often displaying an "M" error code. This
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was due to overly aggressive copy protection; late in the boot process, there is
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code that checksums the ROM and reboots if it's not recognized. The games
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themselves would work fine if they were allowed to boot past this ROM check.
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Anti-M is a pre-booter that controls the games' bootloader long enough to bypass
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the ROM check, allowing you to play these games on any Apple II.
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## How do I use it?
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Boot the Anti-M disk. When it prompts you to insert your original disk, do so,
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then press `<RETURN>`. The game should boot normally.
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## Which games are supported?
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2019-03-10 14:28:28 +00:00
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- Choplifter (Broderbund) (*)
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2019-03-10 17:03:51 +00:00
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- David's Midnight Magic (Broderbund) (*)
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2019-03-10 14:28:28 +00:00
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- Dueling Digits (Broderbund)
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2019-03-10 17:03:51 +00:00
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- Eggs-It (Gebelli)
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2019-03-10 14:28:28 +00:00
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- Frogger (On-Line Systems) (*)
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2019-03-10 17:03:51 +00:00
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- Genetic Drift (Broderbund)
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- High Orbit (Gebelli)
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- Horizon V (Gebelli)
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2019-03-10 14:28:28 +00:00
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- Jawbreaker ][ (On-Line Systems)
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2019-03-11 12:54:25 +00:00
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- Juggler (IDSI)
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2019-03-10 14:28:28 +00:00
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- Labyrinth (Broderbund)
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2019-03-10 17:03:51 +00:00
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- Lazer Silk (Gebelli)
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2019-03-10 14:28:28 +00:00
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- Lunar Leepers (On-Line Systems)
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2019-03-10 17:03:51 +00:00
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- Neptune (Gebelli)
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2019-03-10 14:28:28 +00:00
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- Pest Patrol (On-Line Systems)
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2019-03-10 17:03:51 +00:00
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- Phaser Fire (Gebelli)
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- Red Alert (Broderbund)
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- Russki Duck (Gebelli)
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2019-03-10 14:28:28 +00:00
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- Seafox (Broderbund)
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- Serpentine (Broderbund) (*)
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- Sky Blazer (Broderbund)
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2019-03-10 17:03:51 +00:00
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- Space Quarks (Broderbund)
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2019-03-10 14:28:28 +00:00
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- Star Blazer (Broderbund)
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2019-03-11 12:54:25 +00:00
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- Trick Shot (IDSI)
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2019-03-10 17:03:51 +00:00
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- Zenith (Gebelli)
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2019-03-09 20:30:57 +00:00
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(*) later re-released with different copy protection. Only the first release
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requires Anti-M.
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## Does Anti-M patch my original disk?
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No! All patches are done in memory only. If you reboot your original disk
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(without running Anti-M), it will fail as usual, because the ROM check is still
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there.
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## Can I use Anti-M from a hard drive?
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Yes! Copy the `ANTI.M.SYSTEM` file to anywhere on your ProDOS hard drive and run
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it with your favorite launcher.
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## History
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2019-03-11 12:55:11 +00:00
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2019-03-11
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2019-03-09 20:30:57 +00:00
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- initial release
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