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pcqpascalv1.2d.lha
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Devices
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TrackDisk.i
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1997-05-06
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9KB
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{
Trackdisk.i for PCQ Pascal
}
{$I "Include:Exec/IO.i"}
{$I "Include:Exec/Devices.i"}
{
*--------------------------------------------------------------------
*
* Physical drive constants
*
*--------------------------------------------------------------------
}
Const
NUMSECS = 11;
NUMUNITS = 4;
{
*--------------------------------------------------------------------
*
* Useful constants
*
*--------------------------------------------------------------------
}
{-- sizes before mfm encoding }
TD_SECTOR = 512;
TD_SECSHIFT = 9; { log TD_SECTOR }
{
*--------------------------------------------------------------------
*
* Driver Specific Commands
*
*--------------------------------------------------------------------
}
{
*-- TD_NAME is a generic macro to get the name of the driver. This
*-- way if the name is ever changed you will pick up the change
*-- automatically.
*--
*-- Normal usage would be:
*--
*-- char internalName[] = TD_NAME;
*--
}
TD_NAME = "trackdisk.device";
TDF_EXTCOM = $00010000; { for internal use only! }
TD_MOTOR = CMD_NONSTD + 0; { control the disk's motor }
TD_SEEK = CMD_NONSTD + 1; { explicit seek (for testing) }
TD_FORMAT = CMD_NONSTD + 2; { format disk }
TD_REMOVE = CMD_NONSTD + 3; { notify when disk changes }
TD_CHANGENUM = CMD_NONSTD + 4; { number of disk changes }
TD_CHANGESTATE = CMD_NONSTD + 5; { is there a disk in the drive? }
TD_PROTSTATUS = CMD_NONSTD + 6; { is the disk write protected? }
TD_RAWREAD = CMD_NONSTD + 7; { read raw bits from the disk }
TD_RAWWRITE = CMD_NONSTD + 8; { write raw bits to the disk }
TD_GETDRIVETYPE = CMD_NONSTD + 9; { get the type of the disk drive }
TD_GETNUMTRACKS = CMD_NONSTD + 10; { # of tracks for this type drive }
TD_ADDCHANGEINT = CMD_NONSTD + 11; { TD_REMOVE done right }
TD_REMCHANGEINT = CMD_NONSTD + 12; { remove softint set by ADDCHANGEINT }
TD_GETGEOMETRY = CMD_NONSTD + 13;
TD_EJECT = CMD_NONSTD + 14; { for those drives that support it }
TD_LASTCOMM = CMD_NONSTD + 15;
{
*
* The disk driver has an "extended command" facility. These commands
* take a superset of the normal IO Request block.
*
}
ETD_WRITE = CMD_WRITE + TDF_EXTCOM;
ETD_READ = CMD_READ + TDF_EXTCOM;
ETD_MOTOR = TD_MOTOR + TDF_EXTCOM;
ETD_SEEK = TD_SEEK + TDF_EXTCOM;
ETD_FORMAT = TD_FORMAT + TDF_EXTCOM;
ETD_UPDATE = CMD_UPDATE + TDF_EXTCOM;
ETD_CLEAR = CMD_CLEAR + TDF_EXTCOM;
ETD_RAWREAD = TD_RAWREAD + TDF_EXTCOM;
ETD_RAWWRITE = TD_RAWWRITE + TDF_EXTCOM;
{
*
* extended IO has a larger than normal io request block.
*
}
Type
IOExtTD = record
iotd_Req : IOStdReq;
iotd_Count : Integer;
iotd_SecLabel : Integer;
end;
IOExtTDPtr = ^IOExtTD;
{
* This is the structure returned by TD_DRIVEGEOMETRY
* Note that the layout can be defined three ways:
*
* 1. TotalSectors
* 2. Cylinders and CylSectors
* 3. Cylinders, Heads, and TrackSectors.
*
* #1 is most accurate, #2 is less so, and #3 is least accurate. All
* are usable, though #2 and #3 may waste some portion of the available
* space on some drives.
}
DriveGeometry = Record
dg_SectorSize, { in bytes }
dg_TotalSectors, { total # of sectors on drive }
dg_Cylinders, { number of cylinders }
dg_CylSectors, { number of sectors/cylinder }
dg_Heads, { number of surfaces }
dg_TrackSectors, { number of sectors/track }
dg_BufMemType : Integer; { preferred buffer memory type }
{ (usually MEMF_PUBLIC) }
dg_DeviceType, { codes as defined in the SCSI-2 spec}
dg_Flags : Byte; { flags, including removable }
dg_Reserved : Short;
END;
DriveGeometryPtr = ^DriveGeometry;
Const
{ device types }
DG_DIRECT_ACCESS = 0 ;
DG_SEQUENTIAL_ACCESS = 1 ;
DG_PRINTER = 2 ;
DG_PROCESSOR = 3 ;
DG_WORM = 4 ;
DG_CDROM = 5 ;
DG_SCANNER = 6 ;
DG_OPTICAL_DISK = 7 ;
DG_MEDIUM_CHANGER = 8 ;
DG_COMMUNICATION = 9 ;
DG_UNKNOWN = 31;
{ flags }
DGB_REMOVABLE = 0;
DGF_REMOVABLE = 1;
{
** raw read and write can be synced with the index pulse. This flag
** in io request's IO_FLAGS field tells the driver that you want this.
}
IOTDB_INDEXSYNC = 4;
IOTDF_INDEXSYNC = 16;
{
** raw read and write can be synced with a $4489 sync pattern. This flag
** in io request's IO_FLAGS field tells the driver that you want this.
}
IOTDB_WORDSYNC = 5;
IOTDF_WORDSYNC = 32;
{ labels are TD_LABELSIZE bytes per sector }
TD_LABELSIZE = 16;
{
** This is a bit in the FLAGS field of OpenDevice. If it is set, then
** the driver will allow you to open all the disks that the trackdisk
** driver understands. Otherwise only 3.5" disks will succeed.
}
TDB_ALLOW_NON_3_5 = 0;
TDF_ALLOW_NON_3_5 = 1;
{
** If you set the TDB_ALLOW_NON_3_5 bit in OpenDevice, then you don't
** know what type of disk you really got. These defines are for the
** TD_GETDRIVETYPE command. In addition, you can find out how many
** tracks are supported via the TD_GETNUMTRACKS command.
}
DRIVE3_5 = 1;
DRIVE5_25 = 2;
DRIVE3_5_150RPM = 3;
{
*--------------------------------------------------------------------
*
* Driver error defines
*
*--------------------------------------------------------------------
}
TDERR_NotSpecified = 20; { general catchall }
TDERR_NoSecHdr = 21; { couldn't even find a sector }
TDERR_BadSecPreamble = 22; { sector looked wrong }
TDERR_BadSecID = 23; { ditto }
TDERR_BadHdrSum = 24; { header had incorrect checksum }
TDERR_BadSecSum = 25; { data had incorrect checksum }
TDERR_TooFewSecs = 26; { couldn't find enough sectors }
TDERR_BadSecHdr = 27; { another "sector looked wrong" }
TDERR_WriteProt = 28; { can't write to a protected disk }
TDERR_DiskChanged = 29; { no disk in the drive }
TDERR_SeekError = 30; { couldn't find track 0 }
TDERR_NoMem = 31; { ran out of memory }
TDERR_BadUnitNum = 32; { asked for a unit > NUMUNITS }
TDERR_BadDriveType = 33; { not a drive that trackdisk groks }
TDERR_DriveInUse = 34; { someone else allocated the drive }
TDERR_PostReset = 35; { user hit reset; awaiting doom }
{
*--------------------------------------------------------------------
*
* public portion of the unit structure
*
*--------------------------------------------------------------------
}
Type
TDU_PublicUnit = record
tdu_Unit : Unit; { base message port }
tdu_Comp01Track : Short; { track for first precomp }
tdu_Comp10Track : Short; { track for second precomp }
tdu_Comp11Track : Short; { track for third precomp }
tdu_StepDelay : Integer; { time to wait after stepping }
tdu_SettleDelay : Integer; { time to wait after seeking }
tdu_RetryCnt : Byte; { # of times to retry }
tdu_PubFlags : Byte; { public flags, see below }
tdu_CurrTrk : Short; { track the heads are over... }
{ ONLY ACCESS WHILE UNIT IS STOPPED! }
tdu_CalibrateDelay : Integer; { time to wait after stepping }
{ during a recalibrate }
tdu_Counter : Integer; { counter for disk changes... }
{ ONLY ACCESS WHILE UNIT IS STOPPED! }
end;
TDU_PublicUnitPtr = ^TDU_PublicUnit;
CONST
{ flags for tdu_PubFlags }
TDPB_NOCLICK = 0;
TDPF_NOCLICK = 1;