function TMainForm.ReadParams:Boolean;
var
 B0,B3,B4,B5,B6:Byte;
begin
 Result:=false;
 PClear;
 if not TReset then exit;
 Result:=true;
 TByte($33); //Read ROM
 CRC:=0;
 B0:=TByte($FF); B1:=TByte($FF);
 B2:=TByte($FF); B3:=TByte($FF);
 B4:=TByte($FF); B5:=TByte($FF);
 B6:=TByte($FF); TByte($FF);

 EID.Text:=Format('%.2xH',[B0]);
 if B0=$10
  then
   if (B6*256+B5)>=8
    then EName.Text:='DS18S20'
    else EName.Text:='DS1820'
  else EName.Text:='UNKNOWN';
 ESnum.Text:=Format('%.2x%.2x%.2x%.2x%.2x%.2xH',
                    [B6,B5,B4,B3,B2,B1]);
 if CRC=0 then ECRC.Text:='OK' else ECRC.Text:='FAIL';

 if not TReset then exit;
 TByte($CC); //Skip ROM
 TByte($B8); //Recall EEPROM

 if not TReset then exit;
 TByte($CC); //Skip ROM
 TByte($BE); //Read Scratchpad
 TByte($FF); TByte($FF);
 Usr1:=TByte($FF); Usr2:=TByte($FF);
 EUsr1.Text:=Format('%.2xH',[Usr1]);
 EUsr2.Text:=Format('%.2xH',[Usr2]);
 UpDOwn1.Position:=Usr1;
 UpDOwn2.Position:=Usr2;
 UpDown1.Enabled:=true;
 UpDown2.Enabled:=true;
 EUsr1.Enabled:=true;
 EUsr2.Enabled:=true;
 MWrUsrBytes.Enabled:=true;
end;