FF8/FileFormat JSM

Contents

Fields Scripts

Offset	Size	Data
0	1 byte	Number of door entity
1	1 byte	Number of location (walkmesh line) entity
2	1 byte	Number of background entity
3	1 byte	Number of other entity
4	2 bytes	Offset section 1
6	2 bytes	Offset script data
8	offsetSection1 - 8 = nbEntity * 2	Entry point of each entity
offsetSection1	offsetScriptData - offsetSection1	Entry point of each script
offsetScriptData	varies	Script Data

Entry point of each entity

Each entry is 2 bytes with:

  scriptCount = entryPointEntity & 0x7F;
  label = entryPointEntity >> 7;

The entities are sorted in order of execution (I guess), not in the order they appear in the file.

Entry point of each script

Each entry is 2 bytes with:

  position = (entryPointScript & 0x7FFF)*4;
  flag = entryPointScript >> 15;

The position is relative to offsetScriptData. The meaning of the flag is unknown, it appear only with location and background entities.

Script Data

Each opcode is 4 bytes.

Opcode List