ADEX IMG

ADEX .IMG is a raster graphics format associated with ChromaGraph graphics cards by ADEX Corporation.

The third-party Image Alchemy software supports the format at least as far back as v1.5.1, so the format dates to 1991 or earlier.

''Ed. note: Almost all the information in this article comes from non-authoritative sources, mainly Image Alchemy.''

Discussion
It's difficult to find any information about ADEX ChromaGraph. We can confirm the existence of:
 * A product named "ADEX ChromaGraph II"
 * A company named Adex Corp., of San Jose, CA, whose products include ADEX ChromaTron monitors and ADEX 8514 graphics boards

Identification
Files are observed to start with ASCII "", followed by the byte 0x00 (for a non-compressed image) or 0x01 (RLE compressed).

Software

 * XnView
 * Image Alchemy (read/write)