HP b2600 Reference Manual page 245

GL_COLOR_LOGIC_OP, GL_COLOR_ARRAY, GL_EDGE_FLAG_ARRAY,
GL_INDEX_ARRAY, GL_INDEX_LOGIC_OP, GL_NORMAL_ARRAY,
GL_POLYGON_OFFSET_FILL,GL_POLYGON_OFFSET_LINE,
GL_POLYGON_OFFSET_POINT, GL_TEXTURE_COORD_ARRAY, and
GL_VERTEX_ARRAY are only available if the GL version is 1.1 or greater
Errors
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See Also
glEnable,
glEnableClientState
Chapter 9
GL_INVALID_ENUM is generated if cap is not an accepted value.
GL_INVALID_OPERATION is generated if glIsEnabled is executed between the
execution of glBegin and the corresponding execution of glEnd.
I
glIsEnabled
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