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|
unit IOPort;
interface
uses windows;
procedure outport(portid : integer; value : integer);
procedure outportb(portid : integer; value : BYTE);
function inportb(portid : integer) : byte;
function inport(portid : integer) : integer;
function StartUpIoPorts(PortToAccess : integer) : boolean;
implementation
var
bPrivException : boolean;
procedure outport(portid : integer; value : integer);
Begin
asm
mov edx,portid;
mov eax,value;
out dx,ax;
end;
end;
procedure outportb(portid : integer; value : BYTE);
Begin
asm
mov edx,portid
mov al,value
out dx,al
end;
end;
function inportb(portid : integer) : byte;
Var value : byte;
Begin
asm
mov edx,portid
in al,dx
mov value,al
end;
inportb := value;
end;
function inport(portid : integer) : integer;
Var value : integer;
Begin
value := 0;
asm
mov edx,portid
in ax,dx
mov value,eax
end;
inport := value;
end;
function StartUpIoPorts(PortToAccess : integer) : boolean;
Var hUserPort : THandle;
Begin
hUserPort := CreateFile('\\.\UserPort', GENERIC_READ, 0, nil,OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
CloseHandle(hUserPort); // Activate the driver
Sleep(100); // We must make a process switch
try
inportb(PortToAccess); // Try to access the given port address
except
MessageBox(0,'fel','fel',MB_OK);
end;
end;
end.
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