39 lines
1.3 KiB
C
39 lines
1.3 KiB
C
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/***********************************************************************\
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* Per controller structure. *
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\***********************************************************************/
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struct fdc_data
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{
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int fdcu; /* our unit number */
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int baseport;
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int dmachan;
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int flags;
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#define FDC_ATTACHED 0x01
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#define FDC_HASFTAPE 0x02
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#define FDC_TAPE_BUSY 0x04
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struct fd_data *fd;
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int fdu; /* the active drive */
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struct buf head; /* Head of buf chain */
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struct buf rhead; /* Raw head of buf chain */
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int state;
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int retry;
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int status[7]; /* copy of the registers */
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};
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/***********************************************************************\
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* Throughout this file the following conventions will be used: *
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* fd is a pointer to the fd_data struct for the drive in question *
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* fdc is a pointer to the fdc_data struct for the controller *
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* fdu is the floppy drive unit number *
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* fdcu is the floppy controller unit number *
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* fdsu is the floppy drive unit number on that controller. (sub-unit) *
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\***********************************************************************/
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typedef int fdu_t;
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typedef int fdcu_t;
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typedef int fdsu_t;
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typedef struct fd_data *fd_p;
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typedef struct fdc_data *fdc_p;
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#define FDUNIT(s) (((s)>>6)&03)
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#define FDTYPE(s) ((s)&077)
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