Commodore 64: Atlantis Tape loader

@DrWatson

Published in 

C64 tape formats

 · 3 years ago

Used on...

• Superkid In Space (Atlantis 1991)
• Cavemania (Atlantis 1991)
• Hobgoblins (Atlantis 1991)
• Moon Torc (Atlantis 1991)
• Spooky (Atlantis 1990)
• Superkid (Atlantis 1990)

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Bit 0 = $1D
Bit 1 = $42
Threshold = $2F ($180 clock cycles)
Endianess = LSbF

Pilot : $02 (*256)
Sync : $52,$42

Then...

1 byte : always $03 (ignored)
1 byte : always $6F (ignored)
2 bytes : End Address (MSBF)
2 bytes : Load Address (MSBF)
n bytes : Data.
1 byte : Checkbyte (0 XOR all data bytes).
1 byte : $00 (required).

Note : End Address is +1 (not written to).