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Pascal/Delphi Source File
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1994-05-26
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24KB
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1,048 lines
{ Copyright 1993 by Michael W. Armstrong.
2800 Skipwith Rd
Richmond, VA 23294
Compuserve ID 72740, 1145
This program is entered as Shareware. If you find it useful, a small
donation would be appreciated. Feel free to incorporate the code into
your own programs.
}
{ NOTE : The CD_Vars and CDUNIT_P are at the end of this code }
{$X+}
program CDPlay;
{$IfDef Windows}
{$C PRELOAD}
uses CD_Vars, CDUnit_P, WinCRT, WinProcs;
{$Else}
uses CD_Vars, CDUnit_P, CRT, Drivers;
{$EndIf}
Type
TotPlayRec = Record
Frames,
Seconds,
Minutes,
Nada : Byte;
End;
Var
GoodDisk : Boolean;
SaveExit : Pointer;
OldMode : Word;
CurrentTrack,
StartTrack,
EndTrack : Integer;
TotPlay : TotPlayRec;
TrackInfo : Array[1..99] of PAudioTrackInfo;
function LeadingZero(w: Word): String;
var s: String;
begin
Str(w:0, s);
LeadingZero := Copy('00', 1, 2 - Length(s)) + s;
end;
procedure DrawScreen;
Const TStr = '%03d:%02d';
VStr = '%1d.%2d';
Var FStr : PChar;
NStr : String;
Param: Array[1..2] of LongInt;
Code : Integer;
begin
WriteLn('CD ROM Audio Disk Player');
WriteLn('Copyright 1992 by M. W. ARMSTRONG');
Param[1] := MSCDEX_Version.Major;
Param[2] := MSCDEX_Version.Minor;
{$IfDef Windows}
wvsPrintf(FStr, VStr, Param);
{$Else}
FormatStr(NStr, VStr, Param);
{$EndIf}
WriteLn('MSCDEX Version ', NStr);
Str(NumberOfCD, NStr);
WriteLn('Number of CD ROM Drives is: '+Nstr);
WriteLn('First CD Drive Letter is : '+Chr(FirstCD+65));
WriteLn('There are ' + LeadingZero(EndTrack - StartTrack + 1) + ' Tracks on this disk');
Code := 1;
end;
{***********************************************************************}
{***********************************************************************}
procedure Setup;
Var
LeadOut,
StartP,
TotalPlayTime : LongInt;
I : Integer;
A,B,C : LongInt;
Track : Byte;
EA : Array[1..4] of Byte;
SP,EP : LongInt;
Begin
FillChar(AudioDiskInfo, SizeOf(AudioDiskInfo), #0);
DeviceStatus;
If Audio THEN
Begin
Audio_Disk_Info;
TotalPlayTime := 0;
LeadOut := AudioDiskInfo.LeadOutTrack;
StartTrack := AudioDiskInfo.LowestTrack;
EndTrack := AudioDiskInfo.HighestTrack;
CurrentTrack := StartTrack;
I := StartTrack-1;
Repeat { Checks if Audio Track or Data Track }
Inc(I);
Track := I;
Audio_Track_Info(StartP, Track);
Until (Track AND 64 = 0) OR (I = EndTrack);
StartTrack := I;
For I := StartTrack to EndTrack DO
Begin
Track := I;
Audio_Track_Info(StartP, Track);
New(TrackInfo[I]);
FillChar(TrackInfo[I]^, SizeOf(TrackInfo[I]^), #0);
TrackInfo[I]^.Track := I;
TrackInfo[I]^.StartPoint := StartP;
TrackInfo[I]^.TrackControl := Track;
End;
For I := StartTrack to EndTrack - 1 DO
TrackInfo[I]^.EndPoint := TrackInfo[I+1]^.StartPoint;
TrackInfo[EndTrack]^.EndPoint := LeadOut;
For I := StartTrack to EndTrack DO
Move(TrackInfo[I]^.EndPoint, TrackInfo[I]^.Frames, 4);
TrackInfo[StartTrack]^.PlayMin := TrackInfo[StartTrack]^.Minutes;
TrackInfo[StartTrack]^.PlaySec := TrackInfo[StartTrack]^.Seconds - 2;
For I := StartTrack + 1 to EndTrack DO
Begin
EP := (TrackInfo[I]^.Minutes * 60) + TrackInfo[I]^.Seconds;
SP := (TrackInfo[I-1]^.Minutes * 60) + TrackInfo[I-1]^.Seconds;
EP := EP - SP;
TrackInfo[I]^.PlayMin := EP DIV 60;
TrackInfo[I]^.PlaySec := EP Mod 60;
End;
TotalPlayTime := AudioDiskInfo.LeadOutTrack - TrackInfo[StartTrack]^.StartPoint;
Move(TotalPlayTime, TotPlay, 4);
End;
end;
{***********************************************************************}
Begin
Setup;
If Audio THEN
If Playing THEN
StopAudio
ELSE
Begin
StopAudio;
Play_Audio(TrackInfo[StartTrack]^.StartPoint,
TrackInfo[EndTrack]^.EndPoint);
Audio_Status_Info;
DrawScreen;
End
ELSE
WriteLn('This is not an Audio CD');
WriteLn('UPC Code is: ', UPC_Code);
end.
{ ----------------------------------- CUT HERE -------------------- }
Unit CD_Vars;
Interface
Type
ListBuf = Record
UnitCode : Byte;
UnitSeg,
UnitOfs : Word;
end;
VTOCArray = Array[1..2048] of Byte;
DriveByteArray = Array[1..128] of Byte;
Req_Hdr = Record
Len : Byte;
SubUnit : Byte;
Command : Byte;
Status : Word;
Reserved: Array[1..8] of Byte;
End;
Const
Init = 0;
IoCtlInput = 3;
InputFlush = 7;
IOCtlOutput= 12;
DevOpen = 13;
DevClose = 14;
ReadLong = 128;
ReadLongP = 130;
SeekCmd = 131;
PlayCD = 132;
StopPlay = 133;
ResumePlay = 136;
Type
Audio_Play = Record
APReq : Req_Hdr;
AddrMode : Byte;
Start : LongInt;
NumSecs : LongInt;
end;
IOControlBlock = Record
IOReq_Hdr : Req_Hdr;
MediaDesc : Byte;
TransAddr : Pointer;
NumBytes : Word;
StartSec : Word;
ReqVol : Pointer;
TransBlock: Array[1..130] OF Byte;
End;
ReadControl = Record
IOReq_Hdr : Req_Hdr;
AddrMode : Byte;
TransAddr : Pointer;
NumSecs : Word;
StartSec : LongInt;
ReadMode : Byte;
IL_Size,
IL_Skip : Byte;
End;
AudioDiskInfoRec = Record
LowestTrack : Byte;
HighestTrack : Byte;
LeadOutTrack : LongInt;
End;
PAudioTrackInfo = ^AudioTrackInfoRec;
AudioTrackInfoRec = Record
Track : Integer;
StartPoint : LongInt;
EndPoint : LongInt;
Frames,
Seconds,
Minutes,
PlayMin,
PlaySec,
TrackControl : Byte;
end;
MSCDEX_Ver_Rec = Record
Major,
Minor : Integer;
End;
DirBufRec = Record
XAR_Len : Byte;
FileStart : LongInt;
BlockSize : Integer;
FileLen : LongInt;
DT : Byte;
Flags : Byte;
InterSize : Byte;
InterSkip : Byte;
VSSN : Integer;
NameLen : Byte;
NameArray : Array[1..38] of Char;
FileVer : Integer;
SysUseLen : Byte;
SysUseData: Array[1..220] of Byte;
FileName : String[38];
end;
Q_Channel_Rec = Record
Control : Byte;
Track : Byte;
Index : Byte;
Minutes : Byte;
Seconds : Byte;
Frame : Byte;
Zero : Byte;
AMinutes : Byte;
ASeconds : Byte;
AFrame : Byte;
End;
Var
AudioChannel : Array[1..9] of Byte;
RedBook,
Audio,
DoorOpen,
DoorLocked,
AudioManip,
DiscInDrive : Boolean;
AudioDiskInfo : AudioDiskInfoRec;
DriverList : Array[1..26] of ListBuf;
NumberOfCD : Integer;
FirstCD : Integer;
UnitList : Array[1..26] of Byte;
MSCDEX_Version : MSCDEX_Ver_Rec;
QChannelInfo : Q_Channel_Rec;
Busy,
Playing,
Paused : Boolean;
Last_Start,
Last_End : LongInt;
DirBuf : DirBufRec;
Implementation
Begin
FillChar(DriverList, SizeOf(DriverList), #0);
FillChar(UnitList, SizeOf(UnitList), #0);
NumberOfCD := 0;
FirstCD := 0;
MSCDEX_Version.Major := 0;
MSCDEX_Version.Minor := 0;
end.
{ ----------------------------------- CUT HERE -------------------- }
{$X+}
Unit CDUnit_P;
Interface
{Include the appropriate units.}
{$IfDef Windows}
{$C PRELOAD}
Uses Strings, WinCRT, WinDOS, WinProcs, SimRMI, CD_Vars;
{$EndIf}
{$IfDef DPMI}
Uses Strings, CRT, DOS, WinAPI, SimRMI, CD_Vars;
{$EndIf}
{$IfDef MSDOS}
Uses Strings, CRT, DOS, CD_Vars;
{$EndIf}
Var
Drive : Integer; { Must set drive before all operations }
SubUnit : Integer;
function File_Name(var Code : Integer) : String;
function Read_VTOC(var VTOC : VTOCArray;
var Index : Integer) : Boolean;
procedure CD_Check(var Code : Integer);
procedure Vol_Desc(Var Code : Integer;
var ErrCode : Integer);
procedure Get_Dir_Entry(PathName : String;
var Format, ErrCode : Integer);
procedure DeviceStatus;
procedure Audio_Channel_Info;
procedure Audio_Disk_Info;
procedure Audio_Track_Info(Var StartPoint : LongInt;
Var TrackControl : Byte);
procedure Audio_Status_Info;
procedure Q_Channel_Info;
procedure Lock(LockDrive : Boolean);
procedure Reset;
procedure Eject;
procedure CloseTray;
procedure Resume_Play;
procedure Pause_Audio;
procedure Play_Audio(StartSec, EndSec : LongInt);
function StopAudio : Boolean;
function Sector_Size(ReadMode : Byte) : Word;
function Volume_Size : LongInt;
function Media_Changed : Boolean;
function Head_Location(AddrMode : Byte) : LongInt;
procedure Read_Drive_Bytes(Var ReadBytes : DriveByteArray);
function UPC_Code : String;
Implementation
Const
CarryFlag = $0001;
Var
{$IfDef MSDOS}
Regs : Registers;
{$Else}
Regs :TRealModeRecord; { from SimRMI Unit }
{$EndIf}
DOSOffset,
DOSSegment,
DOSSelector:Word;
AllocateLong:Longint;
IOBlock : Pointer;
{$IfDef MSDOS}
{ standard DOS routines for segments and pointers }
function GetIOBlock(var Block : Pointer; Size : Word) : Boolean;
begin
GetMem(Block, Size);
DOSSegment := Seg(Block^);
DOSOffset := Ofs(Block^);
GetIOBlock := TRUE;
end;
function FreeIOBlock(var Block: Pointer) : Boolean;
begin
FreeMem(Block, SizeOf(Block^));
DOSSegment := 0;
DOSSelector := 0;
DOSOffset := 0;
FreeIOBlock := TRUE;
end;
{$ELSE}
{ Get a block in DOS and set pointer values. DOSSelector is used
to access the block under protected mode. DOSSegment accesses the
block in real mode }
function GetIOBlock(var Block : Pointer; Size : Word) : Boolean;
begin
AllocateLong:=GlobalDOSAlloc(Size); { enough extra room for string }
If AllocateLong<>0 Then {If allocation was successful...}
Begin
DOSSegment:=AllocateLong SHR 16; {Get the real mode segment of the memory}
DOSSelector:=AllocateLong AND $FFFF; {Get the protected mode selector of the memory}
DOSOffset := 0;
Block := Ptr(DOSSelector, 0);
GetIOBlock := TRUE;
End
ELSE
GetIOBlock := FALSE;
end;
{ Free the DOS block and dereference the pointer }
function FreeIOBlock(var Block: Pointer) : Boolean;
begin
DOSSelector := GlobalDOSFree(DOSSelector);
DOSSegment := 0;
Block := NIL;
FreeIOBlock := (DOSSelector = 0);
end;
{$EndIf}
procedure Clear_Regs;
begin
FillChar(Regs, SizeOf(Regs), #0);
end;
procedure CD_Intr;
begin
Regs.AH := $15;
{$IfDef MSDOS}
Intr($2F, Regs); { Call DOS normally }
{$Else}
If NOT SimRealModeInt($2F,@Regs) Then {Call DOS through the DPMI}
Halt(100);
{$EndIf}
end;
procedure MSCDEX_Ver;
begin
Clear_Regs;
Regs.AL := $0C;
Regs.BX := $0000;
CD_Intr;
MSCDEX_Version.Minor := 0;
If Regs.BX = 0 Then
MSCDEX_Version.Major := 1
ELSE
Begin
MSCDEX_Version.Major := Regs.BH;
MSCDEX_Version.Minor := Regs.BL;
End;
end;
procedure Initialize;
begin
NumberOfCD := 0;
Clear_Regs;
Regs.AL := $00;
Regs.BX := $0000;
CD_Intr;
If Regs.BX <> 0 THEN
Begin
NumberOfCD := Regs.BX;
FirstCD := Regs.CX;
Clear_Regs;
FillChar(DriverList, SizeOf(DriverList), #0);
FillChar(UnitList, SizeOf(UnitList), #0);
Regs.AL := $01; { Get List of Driver Header Addresses }
Regs.ES := Seg(DriverList);
Regs.BX := Ofs(DriverList);
CD_Intr;
Clear_Regs;
Regs.AL := $0D; { Get List of CD-ROM Units }
Regs.ES := Seg(UnitList);
Regs.BX := Ofs(UnitList);
CD_Intr;
MSCDEX_Ver;
End;
end;
function File_Name(var Code : Integer) : String;
Var
FN : Pointer;
begin
Clear_Regs;
If NOT GetIOBlock(FN, 64) THEN
Exit;
FillChar(FN, SizeOf(FN), #0);
Regs.AL := Code + 1;
{
Copyright Filename = 1
Abstract Filename = 2
Bibliographic Filename = 3
}
Regs.CX := Drive;
Regs.ES := DOSSegment;
Regs.BX := DOSOffset;
CD_Intr;
Code := Regs.AX;
If (Regs.Flags AND CarryFlag) = 0 THEN
File_Name := StrPas(FN)
ELSE
File_Name := '';
FreeIOBlock(FN);
end;
function Read_VTOC(var VTOC : VTOCArray;
var Index : Integer) : Boolean;
{ On entry -
Index = Vol Desc Number to read from 0 to ?
On return
Case Index of
1 : Standard Volume Descriptor
$FF : Volume Descriptor Terminator
0 : All others
}
var
PVTOC : Pointer;
begin
Clear_Regs;
If NOT GetIOBlock(PVTOC, SizeOf(VTOCArray)) THEN
Exit;
FillChar(PVTOC^, SizeOf(PVTOC^), #0);
Regs.AL := $05;
Regs.CX := Drive;
Regs.DX := Index;
Regs.ES := DOSSegment;
Regs.BX := DOSOffset;
CD_Intr;
Index := Regs.AX;
Move(PVTOC^,VTOC, SizeOf(VTOC));
If (Regs.Flags AND CarryFlag) = 0 THEN
Read_VTOC := TRUE
ELSE
Read_VTOC := FALSE;
FreeIOBlock(PVTOC);
end;
procedure CD_Check(var Code : Integer);
begin
Clear_Regs;
Regs.AL := $0B;
Regs.BX := $0000;
Regs.CX := Drive;
CD_Intr;
If Regs.BX <> $ADAD THEN
Code := 2
ELSE
Begin
If Regs.AX <> 0 THEN
Code := 0
ELSE
Code := 1;
End;
end;
procedure Vol_Desc(Var Code : Integer;
var ErrCode : Integer);
function Get_Vol_Desc : Byte;
begin
Clear_Regs;
Regs.CX := Drive;
Regs.AL := $0E;
Regs.BX := $0000;
CD_Intr;
Code := Regs.AX;
If (Regs.Flags AND CarryFlag) <> 0 THEN
ErrCode := $FF;
Get_Vol_Desc := Regs.DH;
end;
begin
Clear_Regs;
ErrCode := 0;
If Code <> 0 THEN
Begin
Regs.DH := Code;
Regs.DL := 0;
Regs.BX := $0001;
Regs.AL := $0E;
Regs.CX := Drive;
CD_Intr;
Code := Regs.AX;
If (Regs.Flags AND CarryFlag) <> 0 THEN
ErrCode := $FF;
End;
If ErrCode = 0 THEN
Code := Get_Vol_Desc;
end;
procedure Get_Dir_Entry(PathName : String;
var Format, ErrCode : Integer);
var
PN : PChar;
DB : Pointer;
begin
FillChar(DirBuf, SizeOf(DirBuf), #0);
PathName := PathName + #0;
If NOT GetIOBlock(DB, SizeOf(DirBufRec) + 256) THEN
Exit;
PN := Ptr(DOSSelector, SizeOf(DirBufRec) + 1);
Clear_Regs;
Regs.AL := $0F;
Regs.CL := Drive;
Regs.CH := 1;
Regs.ES := DOSSegment;
Regs.BX := SizeOf(DirBufRec) + 1;
Regs.SI := DOSSegment;
Regs.DI := DOSOffset;
CD_Intr;
ErrCode := Regs.AX;
If (Regs.Flags AND CarryFlag) = 0 THEN
Begin
Move(DB^, DirBuf, SizeOf(DirBuf));
Move(DirBuf.NameArray[1], DirBuf.FileName[1], 38);
DirBuf.FileName[0] := #12; { File names are only 8.3 }
Format := Regs.AX
End
ELSE
Format := $FF;
FreeIOBlock(DB);
end;
function IO_Control(Command, NumberOfBytes, TransferBytes,
ReturnBytes, StartPoint : Byte;
var Bytes, TransferBlock): Byte;
var
I : Word;
begin
If NOT GetIOBlock(IOBlock, SizeOf(IOControlBlock)) THEN
Exit;
With IOControlBlock(IOBlock^) DO
Begin
I := Ofs(TransBlock[1]) - Ofs(IOReq_Hdr);
NumBytes := NumberOfBytes;
IOReq_Hdr.Len := 26;
IOReq_Hdr.SubUnit := SubUnit;
IOReq_Hdr.Status := 0;
TransAddr := Ptr(DOSSegment, I); { 23 bytes into the IOBlock^ }
IOReq_Hdr.Command := Command;
Move(Bytes, TransBlock[1], TransferBytes);
Clear_Regs;
Regs.AL := $10;
Regs.CX := Drive;
Regs.ES := DOSSegment;
Regs.BX := DOSOffset;
CD_Intr;
Busy := (IOReq_Hdr.Status AND 512) <> 0;
If ((IOReq_Hdr.Status AND 32768) <> 0) THEN
I := IOReq_Hdr.Status AND $FF
ELSE
I := 0;
If ReturnBytes <> 0 THEN
Move(TransBlock[StartPoint], TransferBlock, ReturnBytes);
End;
IO_Control := I;
FreeIOBlock(IOBlock);
end;
procedure Audio_Channel_Info;
var
Bytes : Byte;
begin
Bytes := 4;
IO_Control(IOCtlInput, 9, 1, 9, 1, Bytes, AudioChannel);
End;
procedure DeviceStatus;
var
Bytes : Array[1..2] OF Byte;
Status: Word;
begin
Bytes[1] := 6;
IO_Control(IOCtlInput, 5, 1, 2, 2, Bytes, Bytes);
Move(Bytes, Status, 2);
DoorOpen := Status AND 1 <> 0;
DoorLocked := Status AND 2 = 0;
Audio := Status AND 16 <> 0;
AudioManip := Status AND 256 <> 0;
DiscInDrive := Status AND 2048 = 0;
RedBook := Status AND 1024 <> 0;
End;
procedure Audio_Disk_Info;
var Bytes : Byte;
begin
Bytes := 10;
IO_Control(IOCtlInput, 7, 1, 6, 2, Bytes, AudioDiskInfo);
Playing := Busy;
end;
procedure Audio_Track_Info(Var StartPoint : LongInt;
Var TrackControl : Byte);
var
Bytes : Array[1..5] Of BYTE;
begin
Bytes[1] := 11;
Bytes[2] := TrackControl; { Track number }
IO_Control(IOCtlInput, 7, 2, 5, 3, Bytes, Bytes);
Move(Bytes[1], StartPoint, 4);
TrackControl := Bytes[5];
Playing := Busy;
end;
procedure Q_Channel_Info;
var
Bytes : Byte;
begin
Bytes := 12;
IO_Control(IOCtlInput, 11, 1, 11, 2, Bytes, QChannelInfo);
end;
procedure Audio_Status_Info;
var
Bytes : Array[1..11] Of Byte;
begin
Bytes[1] := 15;
IO_Control(IOCtlInput, 11, 1, 8, 2, Bytes, Bytes);
Paused := (Word(Bytes[2]) AND 1) <> 0;
Move(Bytes[4], Last_Start, 4);
Move(Bytes[8], Last_End, 4);
Playing := Busy;
end;
procedure Eject;
var
Bytes : Byte;
begin
Bytes := 0;
IO_Control(IOCtlOutput, 1, 1, 0, 0, Bytes, Bytes);
end;
procedure Reset;
var Bytes : Byte;
begin
Bytes := 2;
IO_Control(IOCtlOutput, 1, 1, 0, 0, Bytes, Bytes);
Busy := TRUE;
end;
procedure Lock(LockDrive : Boolean);
var
Bytes : Array[1..2] Of Byte;
begin
Bytes[1] := 1;
If LockDrive THEN
Bytes[2] := 1
ELSE
Bytes[2] := 0;
IO_Control(IOCtlOutput, 2, 2, 0, 0, Bytes, Bytes);
end;
procedure CloseTray;
var Bytes : Byte;
begin
Bytes := 5;
IO_Control(IOCtlOutput, 1, 1, 0, 0, Bytes, Bytes);
end;
Var
AudioPlay : Pointer;
function Play(StartLoc, NumSec : LongInt) : Boolean;
begin
If NOT GetIOBlock(AudioPlay, SizeOf(Audio_Play)) THEN
Exit;
With Audio_Play(AudioPlay^) DO
Begin
APReq.Command := PlayCD;
APReq.Len := 22;
APReq.SubUnit := SubUnit;
Start := StartLoc;
NumSecs := NumSec;
AddrMode := 1;
Regs.AL := $10;
Regs.CX := Drive;
Regs.ES := DOSSegment;
Regs.BX := DOSOffset;
CD_Intr;
Play := ((APReq.Status AND 32768) = 0);
End;
FreeIOBlock(AudioPlay);
end;
procedure Play_Audio(StartSec, EndSec : LongInt);
Var
SP,
EP : LongInt;
SArray : Array[1..4] Of Byte;
EArray : Array[1..4] Of Byte;
begin
Move(StartSec, SArray[1], 4);
Move(EndSec, EArray[1], 4);
SP := SArray[3]; { Must use longint or get negative result }
SP := (SP*75*60) + (SArray[2]*75) + SArray[1];
EP := EArray[3];
EP := (EP*75*60) + (EArray[2]*75) + EArray[1];
EP := EP-SP;
Playing := Play(StartSec, EP);
Audio_Status_Info;
end;
procedure Pause_Audio;
begin
If Playing THEN
Begin
If NOT GetIOBlock(AudioPlay, SizeOf(Audio_Play)) THEN
Exit;
With Audio_Play(AudioPlay^) DO
Begin
APReq.Command := StopPlay;
APReq.Len := 13;
APReq.SubUnit := SubUnit;
End;
Regs.AL := $10;
Regs.CX := Drive;
Regs.ES := DOSSegment;
Regs.BX := DOSOffset;
CD_Intr;
FreeIOBlock(AudioPlay);
end;
Audio_Status_Info;
Playing := FALSE;
end;
procedure Resume_Play;
begin
If NOT GetIOBlock(AudioPlay, SizeOf(Audio_Play)) THEN
Exit;
With Audio_Play(AudioPlay^) DO
Begin
APReq.Command := ResumePlay;
APReq.Len := 13;
APReq.SubUnit := SubUnit;
End;
Regs.AL := $10;
Regs.CX := Drive;
Regs.ES := DOSSegment;
Regs.BX := DOSOffset;
CD_Intr;
Audio_Status_Info;
FreeIOBlock(AudioPlay); { free DOS block anbd dereference pointer }
end;
function StopAudio : Boolean;
begin
If NOT GetIOBlock(AudioPlay, SizeOf(Audio_Play)) THEN
Exit;
With Audio_Play(AudioPlay^) DO
Begin
APReq.Command := StopPlay;
APReq.Len := 13;
APReq.SubUnit := SubUnit;
Regs.AL := $10;
Regs.CX := Drive;
Regs.ES := DOSSegment;
Regs.BX := DOSOffset;
CD_Intr;
StopAudio := ((APReq.Status AND 32768) = 0);
End;
FreeIOBlock(AudioPlay);
end;
function Sector_Size(ReadMode : Byte) : Word;
Var
SecSize : Word;
Bytes : Array[1..2] Of Byte;
begin
Bytes[1] := 7;
Bytes[2] := ReadMode;
IO_Control(IOCtlInput, 4, 2, 2, 3, Bytes, SecSize);
Sector_Size := SecSize;
End;
function Volume_Size : LongInt;
Var
VolSize : LongInt;
Bytes : Byte;
begin
Bytes := 8;
IO_Control(IOCtlInput, 5, 1, 4, 2, Bytes, VolSize);
Volume_Size := VolSize;
End;
function Media_Changed : Boolean;
{ 1 : Media not changed
0 : Don't Know
-1 : Media changed
}
var
MedChng : Byte;
Bytes : Byte;
begin
Bytes := 9;
IO_Control(IOCtlInput, 2, 1, 4, 2, Bytes, MedChng);
Inc(MedChng);
If MedChng IN [1,0] THEN
Media_Changed := True
ELSE
Media_Changed := False;
End;
function Head_Location(AddrMode : Byte) : LongInt;
Var
HeadLoc : Longint;
Bytes : Array[1..2] Of Byte;
begin
Bytes[1] := 1;
Bytes[2] := AddrMode;
IO_Control(IOCtlInput, 6, 2, 4, 3, Bytes, HeadLoc);
Head_Location := HeadLoc;
End;
procedure Read_Drive_Bytes(Var ReadBytes : DriveByteArray);
var
Bytes : Byte;
Begin
Bytes := 5;
IO_Control(IOCtlInput, 130, 1, 128, 3, Bytes, ReadBytes);
End;
function UPC_Code : String;
Var
I, J, K : Integer;
TempStr : String;
Bytes : Array[1..11] Of Byte;
Begin
TempStr := '';
FillChar(Bytes, SizeOf(Bytes), #0);
Bytes[1] := 14;
If (IO_Control(IOCtlInput, 11, 1, 11, 1, Bytes, Bytes) <> 0) THEN
TempStr := 'No UPC Code'
ELSE
Begin
For I := 3 to 9 DO
Begin
J := (Bytes[I] AND $F0) SHR 4;
K := Bytes[I] AND $0F;
TempStr := TempStr + Chr(J + 48);
TempStr := TempStr + Chr(K + 48);
End;
If Length(TempStr) > 13 THEN
TempStr := Copy(TempSTr, 1, 13);
End;
UPC_Code := TempStr;
End;
{************************************************************}
{$IfDef MSDOS}
{$ELSE}
{$F+}
var
ExitRoutine : Pointer;
procedure MyExit;
begin
ExitProc := ExitRoutine;
If DOSSelector <> 0 THEN
Begin
GlobalDOSFree(DOSSelector);
WriteLn('DOS Selector not free');
End
ELSE
WriteLn('DOS Selector free');
end;
{$EndIf}
Begin
NumberOfCD := 0;
FirstCD := 0;
FillChar(MSCDEX_Version, SizeOf(MSCDEX_Version), #0);
Initialize;
Drive := FirstCD;
SubUnit := 0;
{$IfDef MSDOS}
{$ELSE}
ExitRoutine := ExitProc;
ExitProc := @MyExit;
{$EndIf}
End.