1 files changed, 63 insertions, 0 deletions
diff --git a/sys/alpha/include/pc/msdos.h b/sys/alpha/include/pc/msdos.h
new file mode 100644
index 0000000..8d1eb7b
--- /dev/null
+++ b/sys/alpha/include/pc/msdos.h
@@ -0,0 +1,63 @@
+/*
+ * msdos common header file
+ * [obtained from mtools -wfj]
+ * how to decipher DOS disk structures in coexisting with DOS
+ */
+
+#define MSECTOR_SIZE	512		/* MSDOS sector size in bytes */
+#define MDIR_SIZE	32		/* MSDOS directory size in bytes */
+#define MAX_CLUSTER	8192		/* largest cluster size */
+#define MAX_PATH	128		/* largest MSDOS path length */
+#define MAX_DIR_SECS	64		/* largest directory (in sectors) */
+
+#define NEW		1
+#define OLD		0
+
+struct directory {
+	unsigned char name[8];		/* file name */
+	unsigned char ext[3];		/* file extension */
+	unsigned char attr;		/* attribute byte */
+	unsigned char reserved[10];	/* ?? */
+	unsigned char time[2];		/* time stamp */
+	unsigned char date[2];		/* date stamp */
+	unsigned char start[2];		/* starting cluster number */
+	unsigned char size[4];		/* size of the file */
+};
+
+struct bootsector {
+	unsigned char jump[3];		/* Jump to boot code */
+	unsigned char banner[8];	/* OEM name & version */
+	unsigned char secsiz[2];	/* Bytes per sector hopefully 512 */
+	unsigned char clsiz;		/* Cluster size in sectors */
+	unsigned char nrsvsect[2];	/* Number of reserved (boot) sectors */
+	unsigned char nfat;		/* Number of FAT tables hopefully 2 */
+	unsigned char dirents[2];	/* Number of directory slots */
+	unsigned char psect[2];		/* Total sectors on disk */
+	unsigned char descr;		/* Media descriptor=first byte of FAT */
+	unsigned char fatlen[2];	/* Sectors in FAT */
+	unsigned char nsect[2];		/* Sectors/track */
+	unsigned char nheads[2];	/* Heads */
+	unsigned char nhs[4];		/* number of hidden sectors */
+	unsigned char bigsect[4];	/* big total sectors */
+	unsigned char junk[476];	/* who cares? */
+};
+
+/* DOS partition table -- located in boot block */
+
+#define	DOSBBSECTOR	0	/* DOS boot block relative sector number */
+#define	DOSPARTOFF	446
+#define NDOSPART	4
+
+struct dos_partition {
+	unsigned char	dp_flag;	/* bootstrap flags */
+	unsigned char	dp_shd;		/* starting head */
+	unsigned char	dp_ssect;	/* starting sector */
+	unsigned char	dp_scyl;	/* starting cylinder */
+	unsigned char	dp_typ;		/* partition type */
+#define		DOSPTYP_386BSD	0xa5		/* 386BSD partition type */
+	unsigned char	dp_ehd;		/* end head */
+	unsigned char	dp_esect;	/* end sector */
+	unsigned char	dp_ecyl;	/* end cylinder */
+	unsigned long	dp_start;	/* absolute starting sector number */
+	unsigned long	dp_size;	/* partition size in sectors */
+} dos_partitions[NDOSPART];