There are few calls relating to cel projection, because most of the programming work is done by creating and manipulating CCBs. See Graphics Folio Calls for a description of the calls.

• DrawCels() Draws a list of cels (one or more) to the buffer of a bitmap.
• DrawScreenCels() Draws a list of cels (one or more) to the bitmaps of a screen.
• SetReadAddress() Sets a bitmap's read address.
• ResetReadAddress() Resets a bitmap's read address.

• MakeCCBRelative() Creates a CCB relative address.
• MapCel() Maps this cel onto any four corners.
• SetCEControl() Sets the cel engine control word.