More about EGS :
"Enhanced Graphics System (EGS) was developed by Viona Development using the Cluster language (a Modula-2 derivative) for Piccolo and Spectrum graphics boards, supporting screen depths up to 24 bits. It requires a minimum of 2 MB RAM and 4–5 MB of hard disk space. EGS was first presented with the EGS 110/24 card (GVP) at the World of Commodore/Amiga show in New York in April 1992. It supported a broader range of graphics cards than other drivers and was seen by some Amiga magazines as the next RTG standard for Amiga."
https://en.wikipedia.org/wiki/Retargetable_graphics
http://www.amigareport.com/ar205/p1-8.html
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https://www.youtube.com/watch?v=kFHdxdG2Hyc