GEM VDI Metafile

File Format
Name	GEM VDI Metafile
Ontology	Electronic File Formats Graphics GEM VDI Metafile
Extension(s)	.gdi, .gem
PRONOM	fmt/543, fmt/542, x-fmt/215
Released	1985

GEM VDI Metafile (also called GEM Metafile, GEM Vector, or GEM VDI) is a vector graphics metafile format associated with the GEM operating environment by Digital Research.

Identification

Files begin with bytes 0xFF 0xFF.

Following that is a two-byte integer reflecting the header size. It may use either big-endian or little-endian byte order. Likely values are 0x0018, 0x000E, and maybe 0x000F.

Specifications

• http://www.fileformat.info/format/gemvector/spec/index.htm
• GEM Programmer's Guide Vol. 1, Appendix C

Links

• GEM VDI File Format Summary, from the Encyclopedia of Graphics File Formats
• Wikipedia: GEM