Instant Graphics and Sound

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File Format
Name Instant Graphics and Sound
Ontology
Extension(s) .ig, .igs
Released 1988

Instant Graphics and Sound, also known as IGS or IG, is a plain-text graphics language created by Larry Mears in 1988 for the Atari ST computer to transmit vector graphics, sound effects, music, and animation from bulletin board systems. It also enabled mouse interactions.

IGS bears many similarities to the later RIPscrip protocol on the PC. Mears began releasing new versions of the IGS software in 2022, after a 30-year hiatus.

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Identification

These are text files. IGS commands within the files always begin with "G#".

Examples

The following code would draw a line with the start point (206,35) and end point (225,44):

G#L>206,35,225,44:

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