/* cia.h */
#define CIAA       (BYTE *) 0xBFE001
#define CIAB       (BYTE *) 0xFBD100

#define PortA      (BYTE *) 0xBFE001
# define DSK_RDY     (1<<5)  /* PortA of CIAA */
# define DSK_TRACK0  (1<<4)
# define DSK_WPROT   (1<<3)
# define DSK_CHANGE  (1<<2)
# define DSK_POW_LED (1<<1)
# define DSK_OVERLAY (1<<0)  /* ------------- */

#define PortB      (BYTE *) 0xBFD100
# define DSK_MOTOR   (1<<7)  /* PortB of CIAB */
# define DSK_SEL3    (1<<6)
# define DSK_SEL2    (1<<5)
# define DSK_SEL1    (1<<4)
# define DSK_SEL0    (1<<3)
# define DSK_SIDE    (1<<2)
# define DSK_DIREC   (1<<1)
# define DSK_STEP    (1<<0)  /* ------------- */

#define CIABICR    (BYTE *) 0xBFDD00
# define INDEX       (1<<4)