/****************************************
 * xmemory.h02 - Extended Memory Access *
 *               for run6502 Emulator   *
 ****************************************/

#define XLBANK $0F  //Maximum Logical Bank

/* Exhange with with Extended Memory     *
 * Setup: xsetad(xbank, xaddr)           *
 *        setdst(maddr)                  *
 * Args: int n - number of bytes         *
 * Returns: char bank - Extended Bank    *
 *           int addr - Extended Address */
void xshng();

/* Get Logical Extended Memory Address   *
 * Returns: char xbank - Logical Bank    *
 *           int xaddr - Logical Address *
char xgetad();

/* Read Byte from Extended Memory    *
 * Returns: char b: Byte Read        */
char xgetc();

/* Read Word from Extended Memory *
 * Returns: int i: Word Read      */
int xgeti();

/* Read Long from Extended Memory *
 * Returns: long l: Long Read     */
char xgetl();

/* Load from Extended Memory             *
 * Setup: xsetad(xbank, xaddr)           *
 *        setdst(maddr)                  *
 * Args: int n - number of bytes         *
 * Returns: char bank - Extended Bank    *
 *           int addr - Extended Address */
void xload();

/* Write Byte to Extended Memory *
 * Args: char b: Byte to Write   */
void xputc();

/* Write Word to Extended Memory *
 * Args: int i: Word to Write    */
void xputi();

/* Write Long to Extended Memory *
 * Args: long l: Long to Write   */
void xputl();

/* Read Bytes from Extended Memory       *
 * Args: char n - Number of Bytes        *       
 *       int maddr - Destination Address *
 * Returns: char bank - Extended Bank    *
 *           int addr - Extended Address */
void xread();

/* Read Extended Memory Pages      *
 * Args: char n - Number of Pages  *
         char p - Local Start Page */
void xrpage();

/* Save to Extended Memory               *
 * Setup: setsrc(maddr)                  *
 * Args: int n - number of bytes         *
 * Returns: char bank - Extended Bank    *
 *           int addr - Extended Address */
void xsave();

/* Set Extended Memory Address         *
 * Args: char xbank - Extended Bank    *
 *        int xaddr - Extended Address */
void xsetad();

/* Set Extended Memory Page         *
 * Args: char xbank - Extended Bank *
 *        int xpage - Extended Page */
void xsetpg();

/* Swap Extended Memory Pages      *
 * Args: char n - Number of Pages  *
         char p - Local Start Page */
void xspage();

/* Swap Bytes with Extended Memory       *
 * Args: char n - Number of Bytes        *       
 *       int maddr - Destination Address *
 * Returns: char bank - Extended Bank    *
 *           int addr - Extended Address */
void xswap();

/* Write Extended Memory Pages     *
 * Args: char n - Number of Pages  *
         char p - Local Start Page */
void xwpage();

/* Write Bytes to Extended Memory        *
 * Args: char n - Number of Bytes        *       
 *       int maddr - Source Address      *
 * Returns: char bank - Extended Bank    *
 *           int addr - Extended Address */
void xwrite();