📄 device.h
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#define DF_CURLOG 0x020
#define DF_DISKCHANGE 0x040
#define DF_DPCHANGED 0x080
#define DF_REFORMAT 0x100
#define DF_NOACCESS 0x200
/* freedos specific flag bits */
#define DF_LBA 0x400
#define DF_WRTVERIFY 0x800
/* typedef struct ddtstruct ddt;*/
struct gblkio {
UBYTE gbio_spcfunbit;
UBYTE gbio_devtype;
UWORD gbio_devattrib;
UWORD gbio_ncyl;
UBYTE gbio_media;
bpb gbio_bpb;
UWORD gbio_nsecs;
};
struct gblkfv /* for format / verify track */
{
UBYTE gbfv_spcfunbit;
UWORD gbfv_head;
UWORD gbfv_cyl;
UWORD gbfv_ntracks;
};
struct gblkrw /* for read / write track */
{
UBYTE gbrw_spcfunbit;
UWORD gbrw_head;
UWORD gbrw_cyl;
UWORD gbrw_sector;
UWORD gbrw_nsecs;
UBYTE FAR *gbrw_buffer;
};
struct Gioc_media {
WORD ioc_level;
ULONG ioc_serialno;
BYTE ioc_volume[11];
BYTE ioc_fstype[8];
};
struct Access_info {
BYTE AI_spec;
BYTE AI_Flag;
};
/* */
/* Boot Block (Super Block) */
/* */
/* See BPB comments for the offsets below */
/* */
#define BT_JUMP 0
#define BT_OEM 3
#define BT_BPB 11
#define BT_SIZEOF 36
typedef struct {
BYTE bt_jump[3]; /* Boot Jump opcodes */
BYTE bt_oem[8]; /* OEM Name */
bpb bt_bpb; /* BPB for this media/device */
WORD bt_nsecs; /* # Sectors per Track */
WORD bt_nheads; /* # Heads */
WORD bt_hidden; /* # Hidden sectors */
LONG bt_huge; /* use if nsecs == 0 */
BYTE bt_drvno;
BYTE bt_reserv;
BYTE bt_btid;
ULONG bt_serialno;
BYTE bt_volume[11];
BYTE bt_fstype[8];
} boot;
/* File system information structure */
struct fsinfo {
UDWORD fi_signature; /* must be 0x61417272 */
DWORD fi_nfreeclst; /* number of free clusters, -1 if unknown */
DWORD fi_cluster; /* most recently allocated cluster, -1 if unknown */
UBYTE fi_reserved[12];
};
typedef boot super; /* Alias for boot structure */
typedef struct {
UBYTE r_length; /* Request Header length */
UBYTE r_unit; /* Unit Code */
UBYTE r_command; /* Command Code */
UWORD r_status; /* Status */
BYTE r_reserved[8]; /* DOS Reserved Area */
union {
struct {
UBYTE _r_nunits; /* number of units */
BYTE FAR *_r_endaddr; /* Ending Address */
bpb *FAR * _r_bpbptr; /* ptr to BPB array */
UBYTE _r_firstunit;
} _r_init;
struct {
BYTE _r_meddesc; /* MEDIA Descriptor */
BYTE _r_retcode; /* Return Code */
BYTE FAR * _r_vid; /* volume id */
} _r_media;
struct {
BYTE _r_meddesc; /* MEDIA Descriptor */
boot FAR * _r_fat; /* boot sector pointer */
bpb FAR * _r_bpbpt; /* ptr to BPB table */
} _r_bpb;
struct {
BYTE _r_meddesc; /* MEDIA Descriptor */
BYTE FAR * _r_trans; /* Transfer Address */
UWORD _r_count; /* Byte/Sector Count */
UWORD _r_start; /* Starting Sector No. */
BYTE FAR * _r_vid; /* Pointer to volume id */
LONG _r_huge; /* for > 32Mb drives */
} _r_rw;
struct {
unsigned char _r_ndbyte; /* Byte Read From Device */
} _r_nd;
struct {
UBYTE _r_cat; /* Category code */
UBYTE _r_fun; /* Function code */
UBYTE unused[4]; /* SI or DI contents or DS:reqhdr */
union
{
struct gblkio FAR *_r_io;
struct gblkrw FAR *_r_rw;
struct gblkfv FAR *_r_fv;
struct Gioc_media FAR *_r_gioc;
struct Access_info FAR *_r_ai;
} _r_par; /* Pointer to param. block from 440C/440D */
} _r_gen;
} _r_x;
} request;
#define HUGECOUNT 0xffff
#define MAXSHORT 0xffffl
/*
* Macros to assist request structure legibility
*/
/* Init packet macros */
#define r_nunits _r_x._r_init._r_nunits
#define r_endaddr _r_x._r_init._r_endaddr
#define r_bpbptr _r_x._r_init._r_bpbptr
#define r_firstunit _r_x._r_init._r_firstunit
/* MEDIA Check packet macros */
#define r_mcmdesc _r_x._r_media._r_meddesc
#define r_mcretcode _r_x._r_media._r_retcode
#define r_mcvid _r_x._r_media._r_vid
/* Build BPB packet macros */
#define r_bpmdesc _r_x._r_bpb._r_meddesc
#define r_bpfat _r_x._r_bpb._r_fat
#define r_bpptr _r_x._r_bpb._r_bpbpt
/* rw packet macros */
#define r_meddesc _r_x._r_rw._r_meddesc
#define r_trans _r_x._r_rw._r_trans
#define r_count _r_x._r_rw._r_count
#define r_start _r_x._r_rw._r_start
#define r_rwvid _r_x._r_rw._r_vid
#define r_huge _r_x._r_rw._r_huge
/* ndread packet macros */
#define r_ndbyte _r_x._r_nd._r_ndbyte
/* generic IOCTL and IOCTL query macros */
#define r_cat _r_x._r_gen._r_cat
#define r_fun _r_x._r_gen._r_fun
#define r_rw _r_x._r_gen._r_par._r_rw
#define r_io _r_x._r_gen._r_par._r_io
#define r_fv _r_x._r_gen._r_par._r_fv
#define r_gioc _r_x._r_gen._r_par._r_gioc
#define r_ai _r_x._r_gen._r_par._r_ai
/*
*interrupt support (spl & splx) support - IBM style
*/
#define I_NONE 0 /* Initial value */
/* predefined interrupt levels - 8259 support */
#define IRQ0 0x01 /* Level 0 - highest */
#define IRQ1 0x02
#define IRQ2 0x04
#define IRQ3 0x08
#define IRQ4 0x10
#define IRQ5 0x20
#define IRQ6 0x40
#define IRQ7 0x80 /* Level 7 - lowest */
/* standard hardware configuration */
#define I_RTC IRQ0 /* Timer */
#define I_KBD IRQ1 /* Keyboard */
#define I_COM2 IRQ3 /* COM1: */
#define I_COM1 IRQ4 /* COM2: */
#define I_HDC IRQ5 /* Fixed disk */
#define I_FDC IRQ6 /* Diskette */
#define I_PRT IRQ7 /* Printer */
/* standard hardware vectors - 8259 defined */
#define V_RTC 0x08 /* Timer */
#define V_KBD 0x09 /* Keyboard */
#define V_LEV2 0x0a /* Level 2 - uncomitted */
#define V_COM2 0x0b /* COM1: */
#define V_COM1 0x0c /* COM2: */
#define V_HDC 0x0d /* Fixed disk */
#define V_FDC 0x0e /* Diskette */
#define V_PRT 0x0f /* Printer */
#define V_LEV0 0x08 /* Level 0 - highest */
#define V_LEV1 0x09
#define V_LEV2 0x0a /* Level 2 - uncomitted */
#define V_LEV3 0x0b
#define V_LEV4 0x0c
#define V_LEV5 0x0d
#define V_LEV6 0x0e
#define V_LEV7 0x0f /* Level 7 - lowest */
/*
*/
typedef request FAR *rqptr;
typedef bpb FAR *bpbptr;
typedef BYTE FAR *byteptr;
typedef struct dhdr FAR *dhdrptr;
extern request /* I/O Request packets */
ASM CharReqHdr, ASM IoReqHdr, ASM MediaReqHdr;
/* dsk.c */
COUNT ASMCFUNC FAR blk_driver(rqptr rp);
ddt * getddt(int dev);
/* error.c */
COUNT char_error(request * rq, struct dhdr FAR * lpDevice);
COUNT block_error(request * rq, COUNT nDrive, struct dhdr FAR * lpDevice, int mode);
/* sysclk.c */
WORD ASMCFUNC FAR clk_driver(rqptr rp);
/* execrh.asm */
WORD ASMPASCAL execrh(request FAR *, struct dhdr FAR *);
/*
* end of device.h
*/
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