Z Door Data Format

The installed DOOR.PAC archive in Z contains five named DAT members and five matching LBM backgrounds.

File format

DOOR.PAC is a JMP2 archive. Its EDOOR, FDOOR, GDOOR, SDOOR and IDOOR members each decompress to 8848 bytes. The accompanying backgrounds are EDBACK.LBM, FDBACK.LBM, GDBACK.LBM, SDBACK.LBM and IDBACK.LBM, decoded by the IFF image reader.

The available parsers establish the archive structure and member boundaries, but do not document the internal fields of the DOOR DAT payloads. No shared layout with sprite, panel or level DAT files is asserted.

Notes

This is a partial identification article. The filename prefixes distinguish the five member sets; their full selection and data semantics remain undocumented.

Source code

From re-z, the open-source browser port:

• src/formats/jmp2.js – archive extraction
• src/viewer/formats.js – background-image decoding
• src/viewer/catalog.js – archive member enumeration

Credits

The identification and implementation notes above were contributed by VorticonCmdr. If you find this information helpful in a project you're working on, please give credit where credit is due. (A link back to this wiki would be nice too!)