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//
// This code is temporary. When Insignia supplies rom support, it should
// be removed.
//
/* x86 v1.0
* * XBIOSDSK.H * Guest ROM BIOS disk emulation * * History * Created 20-Oct-90 by Jeff Parsons * 17-Apr-91 Trimmed by Dave Hastings for use in temp. softpc * * COPYRIGHT NOTICE * This source file may not be distributed, modified or incorporated into * another product without prior approval from the author, Jeff Parsons. * This file may be copied to designated servers and machines authorized to * access those servers, but that does not imply any form of approval. */
#define MAX_FD 2 // # supported floppy drives
#define MAX_HD 2 // # supported hard disk drives
#define MAX_DRIVES (MAX_FD+MAX_HD)
#define DRIVE_FD0 0x00 // first floppy disk drive #
#define DRIVE_FD1 0x01 //
#define DRIVE_HD0 0x80 // first hard disk drive #
#define DRIVE_HD1 0x81 //
/* Drive types for QUERYDRVPARMS
*/#define DRVTYPE_360KB 1
#define DRVTYPE_1200KB 2
#define DRVTYPE_720KB 3
#define DRVTYPE_1440KB 4
/* BIOS disk functions
*/#define DSKFUNC_DISKRESET 0x00
#define DSKFUNC_DISKSTATUS 0x01
#define DSKFUNC_READSECTORS 0x02
#define DSKFUNC_WRITESECTORS 0x03
#define DSKFUNC_VERIFYSECTORS 0x04
#define DSKFUNC_FORMATTRACK 0x05
#define DSKFUNC_QUERYDRVPARMS 0x08
#define DSKFUNC_QUERYDASDTYPE 0x15
#define DSKFUNC_QUERYCHANGE 0x16
#define DSKFUNC_SETDISKTYPE 0x17
#define DSKFUNC_SETMEDIATYPE 0x18
/* BIOS disk status codes
*/#define DSKSTAT_SUCCESS 0x00 // successful completion
#define DSKSTAT_BADCMD 0x01 // bad command
#define DSKSTAT_BADADDRMARK 0x02 // address mark not found
#define DSKSTAT_WRITEPROTECT 0x03 // write on write-protected disk
#define DSKSTAT_RECNOTFOUND 0x04 // sector not found
#define DSKSTAT_BADRESET 0x05 // reset failed (HD)
#define DSKSTAT_MEDIACHANGE 0x06 // media changed
#define DSKSTAT_INITFAIL 0x07 // parm. act. failed (HD)
#define DSKSTAT_BADDMA 0x08 // DMA overrun
#define DSKSTAT_DMABOUNDARY 0x09 // DMA across 64K boundary
#define DSKSTAT_BADSECTOR 0x0A // bad sector detected (HD)
#define DSKSTAT_BADTRACK 0x0B // bad track detected (HD)
#define DSKSTAT_BADMEDIATYPE 0x0C // unsupported track (HD)
#define DSKSTAT_BADFMTSECNUM 0x0D // bad # of sectors on format (HD)
#define DSKSTAT_ADDRMARKDET 0x0E // ctrl data addr mark detected (HD
#define DSKSTAT_DMAARBERR 0x0F // DMA arbitration error (HD)
#define DSKSTAT_BADCRCECC 0x10 // bad CRC/ECC
#define DSKSTAT_DATACORRECT 0x11 // data ECC corrected
#define DSKSTAT_BADCNTLR 0x20 // controller failure
#define DSKSTAT_BADSEEK 0x40 // seek failed
#define DSKSTAT_TIMEOUT 0x80 // time out
#define DSKSTAT_DRVNOTREADY 0xAA // drive not ready (HD)
#define DSKSTAT_UNDEFERR 0xBB // undefined error (HD)
#define DSKSTAT_WRITEFAULT 0xCC // write fault (HD)
#define DSKSTAT_STATUSERROR 0xE0 // status register error (HD)
#define DSKSTAT_SENSEFAIL 0xFF // sense operation failed (HD)
/* BIOS Data Area disk locations
*/#define DSKDATA_SEEKSTATUS 0x43E // drive recal. status (1 byte)
#define DSKDATA_MOTORSTATUS 0x43F // motor status (1 byte)
#define DSKDATA_MOTORCOUNT 0x440 // time-out count for motor (1 byte)
#define DSKDATA_DISKETTESTATUS 0x441 // return code status (1 byte)
#define DSKDATA_NECSTATUS 0x442 // controller status bytes (7 bytes)
#define DSKDATA_DISKSTATUS1 0x474 // return code status (1 byte)
/* Floppy Diskette Parameter Table
* (pointed by vector BIOSINT_FDSKPARMS (1Eh)) */typedef struct fdp_s { BYTE bSpecify1; // step-rate, head-unload
BYTE bSpecify2; // head-load, DMA mode
BYTE bMotorOff; // motor-off delay
BYTE bSectorSize; // bytes/sec (0=128,1=256,2=512,3=1024)
BYTE nLastSector; // (or think of it as # sectors/track)
BYTE lenGapRW; //
BYTE lenData; //
BYTE lenGapFormat; //
BYTE bFormatData; // format initialization byte
BYTE bSettle; // head settle time
BYTE bMotorOn; // motor start-up time
} FDP;typedef FDP *PFDP; // pointer to diskette parameter table
/* Hard Disk Parameter Table
*/typedef struct hdp_s { USHORT usMaxCylinders; // maximum number of cylinders
BYTE bMaxHeads; // maximum number of heads
USHORT usReserve1; // reserved (not used)
USHORT usWritePrecompCyl; // starting write precompensation cyl.
BYTE bMaxECCDataBurstLen; // maximum ECC data burst length
BYTE bControl; // control byte
BYTE abReserve2[3]; // reserved (not used)
USHORT usLandingZone; // landing zone for head parking
BYTE bSectorsPerTrack; // number of sectors per track
BYTE bReserve3; // reserved for future use
} HDP;typedef HDP *PHDP; // pointer to hard disk parameter table
/* Hard Disk Parameter Table control byte bit definitions
*/#define HDPCTRL_DISABLERETRY 0xC0 // disable retries
#define HDPCTRL_EXCEED8HEADS 0x08 // more than 8 heads
/* Boot sector structures (more DOS-defined than BIOS-defined however -JTP)
*/#define PARTITION_ACTIVE 0x80 // status values
#define PARTITION_12BITFAT 1 // type valus
#define PARTITION_16BITFAT 4
#define PARTITION_LARGEFAT 6
typedef struct mbr_s { // Master Boot Record
BYTE boot_code[0x1BE]; BYTE partition_status; BYTE starting_head; USHORT starting_sec_cyl; BYTE partition_type; BYTE ending_head; USHORT ending_sec_cyl; ULONG starting_abs_sector; ULONG total_sectors;} MBR;typedef MBR *PMBR;
typedef struct bpb_s { // BIOS Parameter Block (from sysbloks.h)
BYTE boot_code[0x0B]; USHORT bytes_per_sector; // sector size
BYTE sectors_per_cluster; // sectors per allocation unit
USHORT reserved_sectors; // number of reserved sectors
BYTE nbr_fats; // number of fats
USHORT root_entries; // number of directory entries
USHORT total_sectors; // number of sectors
BYTE media_type; // fatid byte
USHORT sectors_per_fat; // sectors in a copy of the FAT
USHORT sectors_per_track; // number of sectors per track
USHORT number_of_heads; // number of heads
ULONG hidden_sectors; // number of hidden sectors
ULONG large_total_sectors; // large total sectors
BYTE reserved[6]; // 6 reserved bytes
} BPB;typedef BPB *PBPB;
/* Virtual disk mapping info
* * VIRTDISK is the header of a virtual disk file. Following the header * is an optional track table, and TRACKINFO is the format of each entry * in that table. The track table is only present if the last two * fields in the header (nsecTrack and nbSector) are zero, indicating a * non-homogeneous disk structure. * * Currently, a max of 4 DRIVEMAP structures are supported. The first two * entries are for physical drives 0 and 1 (specified in the command-line * options as drives A: and B:), and subsequent entries are for physical * hard drives 0x80 and up (specified as drives C: and up). Each DRIVEMAP * describes the remapping that should occur, if any, and for virtual disk * files, it also contains the virtual disk file header (which is read in * during initialization). * * When a request comes in for one of those drives, we check the flags in * corresponding DRIVEMAP structure. If no flags are set, no remapping * or virtualization occurs (drive behaves normally). This is the default. * If the drive is disabled (eg, "A:=*"), then all requests are returned * with an error. If the drive is remapped to another physical drive (eg, * "A:=B:") then the request is routed to the mapped drive. Finally, if * the drive is remapped to a virtual disk file, the appropriate file I/O * is performed. * * NOTE: Contrary to comments above, access to physical drives is not * currently supported, so mapping to a virtual drive is all you can do * right now.... (24-Nov-90 JTP) */
#define VDFLAGS_WRITEPROTECT 0x01 // virtual disk is "write-protected"
typedef struct virtdisk_s { BYTE fbVirt; // flags
BYTE nHeads; // # heads
USHORT nCyls; // # cylinders
USHORT nsecTrack; // # sectors per track
USHORT nbSector; // # bytes per sector
} VIRTDISK;typedef VIRTDISK *PVIRTDISK;
typedef struct trackinfo_s { USHORT nsecTrack; // # sectors per track
USHORT nbSector; // # bytes per sector
ULONG offVirtDisk; // offset within virtual disk file
} TRACKINFO;typedef TRACKINFO *PTRACKINFO;
#define DMFLAGS_VIRTUAL 0x01 // physical remapped to virtual
#define DMFLAGS_DISABLED 0x02 // physical remapped to disabled
#define DMFLAGS_PHYSICAL 0x04 // physical remapped to physical
#define DMFLAGS_LOGICAL 0x08 // physical remapped to logical
typedef struct drivemap_s { BYTE fbMap; // flags
BYTE iPhysical; // # of remapped drive, if any
FILE *hfVirtDisk; // handle to virtual disk, if any
VIRTDISK vdInfo; // virtual disk info, if any
#ifdef LOGICAL_DRIVE_SUPPORT
ULONG nsecHidden; // from BPB, if any (logical disks only)
BYTE type; // disk type, if any (logical disks only)
#endif
} DRIVEMAP;typedef DRIVEMAP *PDRIVEMAP;
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