Tentative fdc patches...

1 files changed, 38 insertions, 0 deletions

diff --git a/sys/isa/fdc.h b/sys/isa/fdc.h
new file mode 100644
index 0000000..3320de3
--- /dev/null
+++ b/sys/isa/fdc.h
@@ -0,0 +1,38 @@
+
+/***********************************************************************\
+* Per controller structure.						*
+\***********************************************************************/
+struct fdc_data
+{
+	int	fdcu;		/* our unit number */
+	int	baseport;
+	int	dmachan;
+	int	flags;
+#define FDC_ATTACHED	0x01
+#define FDC_HASFTAPE	0x02
+#define FDC_TAPE_BUSY	0x04
+	struct	fd_data *fd;
+	int fdu;		/* the active drive	*/
+	struct buf head;	/* Head of buf chain      */
+	struct buf rhead;	/* Raw head of buf chain  */
+	int state;
+	int retry;
+	int status[7];		/* copy of the registers */
+};
+
+/***********************************************************************\
+* Throughout this file the following conventions will be used:		*
+* fd is a pointer to the fd_data struct for the drive in question	*
+* fdc is a pointer to the fdc_data struct for the controller		*
+* fdu is the floppy drive unit number					*
+* fdcu is the floppy controller unit number				*
+* fdsu is the floppy drive unit number on that controller. (sub-unit)	*
+\***********************************************************************/
+typedef int	fdu_t;
+typedef int	fdcu_t;
+typedef int	fdsu_t;
+typedef	struct fd_data *fd_p;
+typedef struct fdc_data *fdc_p;
+
+#define FDUNIT(s)       (((s)>>6)&03)
+#define FDTYPE(s)       ((s)&077)