TBT98-ANM

This is a format used in the intro to the Tie Break Tennis 98 game.

File header:

 4 bytes - width
 4 bytes - height
 4 bytes - number of frames
 4 bytes - frames per second
 4 bytes - ?

Frame data starts with 32-bit size and consists of simple opcodes, usually for processing 4x4 tiles:

• 1 -- fill tile with the next byte value
• 4 -- read new tile data
• 8 -- read 16-bit number telling how many tiles to leave unchanged
• 16 -- new VGA palette follows