386BSD 0.1 development

Work on file usr/src/sys.386bsd/i386/include/pc/msdos.h

Co-Authored-By: Lynne Greer Jolitz <ljolitz@cardio.ucsf.edu>
Synthesized-from: 386BSD-0.1

diff --git a/usr/src/sys.386bsd/i386/include/pc/msdos.h b/usr/src/sys.386bsd/i386/include/pc/msdos.h
new file mode 100644 (file)
index 0000000..8d1eb7b
--- /dev/null
+++ b/usr/src/sys.386bsd/i386/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];