Commander X16

According to the current version of the X16 PRG, the Kernal contains these useful graphics calls:
GRAPH_set_window
GRAPH_set_font
GRAPH_get_char_size
GRAPH_draw_oval
GRAPH_draw_image

...and others. However, the BASIC does not seem to support any of these. (unless maybe the documentation is incomplete?) I am surprised that these functions are not available, since it would be just a kernal call to implement them.
-Bill

GRAPH_draw_oval is specifically listed as not implemented (if you watch the footnotes). GRAPH_set_window is also only partially implemented.

The other functions can be called with a SYS though there are no specific BASIC keywords for them.

I've got some code here that demonstrates using SYS to call ROM functions and at the same time implements it's own Draw_Image using a file as an image buffer

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