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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_LASTCOMM = CMD_NONSTD + 13;
-
- {
- *
- * 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;
-
-
- Const
-
- {
- ** 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;
-
-
- { 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;
-
- {
- *--------------------------------------------------------------------
- *
- * 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 }
- end;
- TDU_PublicUnitPtr = ^TDU_PublicUnit;
-
-