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- Overlay module v1.0 format by Psycho (C) '93
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- The overlay module begining at end of base file.
- On this position are the overlay header.
- At to this position a dword type pointer refer that on is the file-end.
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- Now coming the header:
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- offset 0: (word) predefined ID
- offset 2: (word) user defined ID
- offset 4: (dword) pointer to the overlay item in the file.
- offset 8: (dword) overlay item length in bytes
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- And this repeating.
- If no more overlay item when the all member in present header equal 0.
- On the file-end is a five bytes control string that equal : 'PSO10'
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