📄 device.h
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/****************************************************************/
/* */
/* device.h */
/* Device Driver Header File */
/* */
/* November 20, 1991 */
/* */
/* Copyright (c) 1995 */
/* Pasquale J. Villani */
/* All Rights Reserved */
/* */
/* This file is part of DOS-C. */
/* */
/* DOS-C is free software; you can redistribute it and/or */
/* modify it under the terms of the GNU General Public License */
/* as published by the Free Software Foundation; either version */
/* 2, or (at your option) any later version. */
/* */
/* DOS-C is distributed in the hope that it will be useful, but */
/* WITHOUT ANY WARRANTY; without even the implied warranty of */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See */
/* the GNU General Public License for more details. */
/* */
/* You should have received a copy of the GNU General Public */
/* License along with DOS-C; see the file COPYING. If not, */
/* write to the Free Software Foundation, 675 Mass Ave, */
/* Cambridge, MA 02139, USA. */
/****************************************************************/
#ifdef MAIN
#ifdef VERSION_STRINGS
static BYTE *device_hRcsId =
"$Id: device.h,v 1.23 2004/05/29 09:51:46 bartoldeman Exp $";
#endif
#endif
/*
* Status Word Bits
*/
#define S_ERROR 0x8000 /* Error bit */
#define S_BUSY 0x0200 /* Device busy bit */
#define S_DONE 0x0100 /* Device operation completed */
#define S_MASK 0x00ff /* Mask to extract error code */
/*
* MEDIA Descriptor Byte Bits
*/
#define MD_2SIDE 1 /* MEDIA is two sided */
#define MD_8SECTOR 2 /* MEDIA is eight sectored */
#define MD_REMOVABLE 4 /* MEDIA is removable (floppy) */
/*
* Media Return Codes
*/
#define M_CHANGED -1 /* MEDIA was changed */
#define M_DONT_KNOW 0 /* MEDIA state unkown */
#define M_NOT_CHANGED 1 /* MEDIA was not changed */
/*
* Error Return Codes
*/
#define E_WRPRT 0 /* Write Protect */
#define E_UNIT 1 /* Unknown Unit */
#define E_NOTRDY 2 /* Device Not Ready */
#define E_CMD 3 /* Unknown Command */
#define E_CRC 4 /* Crc Error */
#define E_LENGTH 5 /* Bad Length */
#define E_SEEK 6 /* Seek Error */
#define E_MEDIA 7 /* Unknown MEDIA */
#define E_NOTFND 8 /* Sector Not Found */
#define E_PAPER 9 /* No Paper */
#define E_WRITE 10 /* Write Fault */
#define E_READ 11 /* Read Fault */
#define E_FAILURE 12 /* General Failure */
/*
* Command codes
*/
#define C_INIT 0x00 /* Initialize */
#define C_MEDIACHK 0x01 /* MEDIA Check */
#define C_BLDBPB 0x02 /* Build BPB */
#define C_IOCTLIN 0x03 /* Ioctl In */
#define C_INPUT 0x04 /* Input (Read) */
#define C_NDREAD 0x05 /* Non-destructive Read */
#define C_ISTAT 0x06 /* Input Status */
#define C_IFLUSH 0x07 /* Input Flush */
#define C_OUTPUT 0x08 /* Output (Write) */
#define C_OUTVFY 0x09 /* Output with verify */
#define C_OSTAT 0x0a /* Output */
#define C_OFLUSH 0x0b /* Output Flush */
#define C_IOCTLOUT 0x0c /* Ioctl Out */
#define C_OPEN 0x0d /* Device Open */
#define C_CLOSE 0x0e /* Device Close */
#define C_REMMEDIA 0x0f /* Removable MEDIA */
#define C_OUB 0x10 /* Output till busy */
#define C_GENIOCTL 0x13 /* Generic Ioctl */
#define C_GETLDEV 0x17 /* Get Logical Device */
#define C_SETLDEV 0x18 /* Set Logical Device */
#define C_IOCTLQRY 0x19 /* Ioctl Query */
/*
* Convienence macros
*/
#define failure(x) (S_ERROR+S_DONE+x)
#ifndef TRUE
#define TRUE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif
/*
* structures
*/
/* Device header */
struct dhdr {
struct dhdr
FAR *dh_next;
UWORD dh_attr;
VOID(*dh_strategy) (void);
VOID(*dh_interrupt) (void);
UBYTE dh_name[8];
};
#define ATTR_SUBST 0x8000
#define ATTR_CHAR 0x8000
#define ATTR_IOCTL 0x4000
#define ATTR_BLDFAT 0x2000
#define ATTR_REMOTE 0x1000
#define ATTR_EXCALLS 0x0800
#define ATTR_QRYIOCTL 0x0080
#define ATTR_GENIOCTL 0x0040
#define ATTR_RAW 0x0400
#define ATTR_FASTCON 0x0010
#define ATTR_CLOCK 0x0008
#define ATTR_NULL 0x0004
#define ATTR_CONOUT 0x0002
#define ATTR_HUGE 0x0002
#define ATTR_CONIN 0x0001
/* */
/* Bios Parameter Block structure */
/* */
#define FAT_NO_MIRRORING 0x80
#define BPB_SIZEOF 31 /* size of the standard BPB */
typedef struct {
UWORD bpb_nbyte; /* Bytes per Sector */
UBYTE bpb_nsector; /* Sectors per Allocation Unit */
UWORD bpb_nreserved; /* # Reserved Sectors */
UBYTE bpb_nfat; /* # FAT's */
UWORD bpb_ndirent; /* # Root Directory entries */
UWORD bpb_nsize; /* Size in sectors */
UBYTE bpb_mdesc; /* MEDIA Descriptor Byte */
UWORD bpb_nfsect; /* FAT size in sectors */
UWORD bpb_nsecs; /* Sectors per track */
UWORD bpb_nheads; /* Number of heads */
ULONG bpb_hidden; /* Hidden sectors */
ULONG bpb_huge; /* Size in sectors if */
/* bpb_nsize == 0 */
#ifdef WITHFAT32
ULONG bpb_xnfsect; /* FAT size in sectors if */
/* bpb_nfsect == 0 */
UWORD bpb_xflags; /* extended flags */
/* bit 7: disable mirroring */
/* bits 6-4: reserved (0) */
/* bits 3-0: active FAT number */
UWORD bpb_xfsversion; /* filesystem version */
ULONG bpb_xrootclst; /* starting cluster of root dir */
UWORD bpb_xfsinfosec; /* FS info sector number, */
/* 0xFFFF if unknown */
UWORD bpb_xbackupsec; /* backup boot sector number */
/* 0xFFFF if unknown */
#endif
} bpb;
#define N_RETRY 5 /* number of retries permitted */
#define SEC_SIZE 512 /* size of sector in bytes */
#define LBA_READ 0x4200
#define LBA_WRITE 0x4300
struct _bios_LBA_address_packet
/* Used to access a hard disk via LBA */
/* Added by Brian E. Reifsnyder */
{
unsigned char packet_size; /* size of this packet...set to 16 */
unsigned char reserved_1; /* set to 0...unused */
unsigned char number_of_blocks; /* 0 < number_of_blocks < 128 */
unsigned char reserved_2; /* set to 0...unused */
UBYTE far *buffer_address; /* addr of transfer buffer */
unsigned long block_address; /* LBA address */
unsigned long block_address_high; /* high bytes of LBA addr...unused */
};
struct CHS {
UWORD Cylinder;
UWORD Head;
UWORD Sector;
};
/* DOS 4.0-7.0 drive data table (see RBIL at INT2F,AX=0803) */
typedef struct ddtstruct {
struct ddtstruct FAR *ddt_next;
/* pointer to next table (offset FFFFh if last table) */
UBYTE ddt_driveno; /* physical unit number (for INT 13) */
UBYTE ddt_logdriveno; /* logical drive number (0=A:) */
bpb ddt_bpb; /* BIOS Parameter Block */
UBYTE ddt_flags;
/* bit 6: 16-bit FAT instead of 12-bit
bit 7: unsupportable disk (all accesses will return Not Ready) */
UWORD ddt_FileOC; /* Count of Open files on Drv */
UBYTE ddt_type; /* device type */
UWORD ddt_descflags; /* bit flags describing drive */
UWORD ddt_ncyl; /* number of cylinders
(for partition only, if hard disk) */
bpb ddt_defbpb; /* BPB for default (highest) capacity supported */
UBYTE ddt_reserved[6]; /* (part of BPB above) */
UBYTE ddt_ltrack; /* last track accessed */
union {
ULONG ddt_lasttime; /* removable media: time of last access
in clock ticks (FFFFFFFFh if never) */
struct {
UWORD ddt_part; /* partition (FFFFh = primary, 0001h = extended)
always 0001h for DOS 5+ */
UWORD ddt_abscyl; /* absolute cylinder number of partition's
start on physical drive
(FFFFh if primary partition in DOS 4.x) */
} ddt_hd;
} ddt_fh;
UBYTE ddt_volume[12]; /* ASCIIZ volume label or "NO NAME " if none
(apparently taken from extended boot record
rather than root directory) */
ULONG ddt_serialno; /* serial number */
UBYTE ddt_fstype[9]; /* ASCIIZ filesystem type ("FAT12 " or "FAT16 ") */
ULONG ddt_offset; /* relative partition offset */
} ddt;
/* description flag bits */
#define DF_FIXED 0x001
#define DF_CHANGELINE 0x002
#define DF_CURBPBLOCK 0x004
#define DF_SAMESIZE 0x008
#define DF_MULTLOG 0x010
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