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Commodore 64: Enigma Variations Tape loader

DrWatson's profile picture
Published in 
C64 tape formats
 · 26 May 2021

Found on...

  • Defenders of the Earth
  • Count Duckula
  • Hong Kong Phooey
  • Postman Pat
  • Postman Pat 2
  • Sooty and Sweep
  • Thomas the Tank Engine
  • Slug
  • Father Christmas
  • Kick Off 2
  • Nineteen - Boot Camp
  • Ace 2
  • Frightmare
  • Traz

-----------------

Threshold : $2D
Endianess : MSbF
Bit 0 : $22
Bit 1 : $42
Pilot : $40 (*768)
Sync : $5A

Blocks...

First block is loaded at $0800, $0900 or $0c00 depending on game and is $0200 bytes long.
Number and addresses of blocks varies according to game.

Block checksums: None


Additional information:


First block start and end addresses are hard coded in main loader.
Execution is then passed to this first block that sets following block addresses and reuses main load routine.
Start block address is always set at ($0060)
End block address is always set at ($0062)
There are some titles by Alternative Software and Cascade Games that also use this loader

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