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#define B_bsrDAV (BSR & 0x40)
#define B_ATN (BSR & 0x80)
#define BCR *(unsigned char *) (BASE + 0x7D)
#define E_REN 0x01
#define E_IFC 0x02
#define E_bcrSRQ 0x04
#define E_EOI 0x08
#define E_NRFD 0x10
#define E_NDAC 0x20
#define E_bcrDAV 0x40
#define E_ATN 0x80
#endif
