/********************************************
 * screen - Screen Control Routines for C02 *
 ********************************************/

/* Set Background Color                    *
 * Args: color -  background color code    */
void bkgclr();

/* Clear the Screen                        */
void clrscn();

/* Move Cursor Down                       */
void crsrdn();

/* Move Cursor to Top Left of Screen       */
void crsrhm();

/* Move Cursor Left                       */
void crsrlf();

/* Move Cursor Right                      */
void crsrrt();

/* Move Cursor Up                          */
void crsrup();

/* Get Character at Current Position       *
 * Returns: ASCII code of character        */
char curchr();

/* Move Cursor to Specified Coordinates    *
 * Args: column - screen column (0 = left) *
 *       row -    screen line (0 = top)    */
void mvcrsr();

/* Get Cursor Horizontal Position          *
 * Returns: current cursor column          */
char scncol();

/* Get Screen Height in Columns            *
 * Returns: screen height                  */
char scnhgt();

/* Get Cursor Vertical Position            *
 * Returns: current cursor row             */
char scnrow();

/* Get Screen Width in Columns             *
 * Returns: screen width                   */
char scnwid();

/* Set Text Color                          *
 * Args: color -  text color code          */
void txtclr();