Here's yet another list of supported Pascal functions by Script Core...
function IntToStr(I: Int64): String;
function IntToStr(I: Integer): String;
function StrToInt(S: String): Longint;
function StrToIntDef(S: string; Def: Longint): Longint; {Converts a string to an integer.}
function Copy(S: String; IFrom, ICount: Longint): String
function Pos(substr, s: string): Longint;
procedure Delete(var S: string; IFrom, ICount: Longint);
procedure Insert(S: String; var S2: String; IPos: Longint);
function GetArrayLength: Integer;
Function StrGet(var S : String; I : Integer) : Char;
procedure StrSet(c : Char; I : Integer; var s : String);
Function WStrGet(var S : WideString; I : Integer) : WideChar;
procedure WStrSet(c : WideChar; I : Integer; var s : WideString);
Function StrGet2(S : String; I : Integer) : Char;
Function AnsiUppercase(s : string) : string;
Function AnsiLowercase(s : string) : string;
Function Uppercase(s : string) : string;
Function Lowercase(s : string) : string;
Function Trim(s : string) : string;
function Length(s : string) : Integer;
procedure SetLength;
function Low: Int64;
function High: Int64;
procedure Dec;
procedure Inc;
Function Sin(e : Extended) : Extended;
Function Cos(e : Extended) : Extended;
Function Sqrt(e : Extended) : Extended;
Function Round(e : Extended) : Longint;
Function Trunc(e : Extended) : Longint;
Function Int(e : Extended) : Extended;
Function Pi : Extended;
Function Abs(e : Extended) : Extended;
function StrToFloat(s: string): Extended;
Function FloatToStr(e : Extended) : String;
Function Padl(s : string;I : longInt) : string;
Function Padr(s : string;I : longInt) : string;
Function Padz(s : string;I : longInt) : string;
Function Replicate(c : char;I : longInt) : string;
Function StringOfChar(c : char;I : longInt) : string;
function Unassigned: Variant;
function VarIsEmpty(const V: Variant): Boolean;
function Null: Variant;
function VarIsNull(const V: Variant): Boolean;
function VarType(const V: Variant): TVarType;
procedure RaiseLastException;
procedure RaiseException(Ex: TIFException; Param: string);
function ExceptionType: TIFException;
function ExceptionParam: string;
function ExceptionProc: Cardinal;
function ExceptionPos: Cardinal;
function ExceptionToString(er: TIFException; Param: string): string;
function StrToInt64(s: string): int64;
function Int64ToStr(i: Int64): string;
function SizeOf: Longint;
function IDispatchInvoke(Self: IDispatch; PropertySet: Boolean; const Name: String; Par: array of variant): variant;
function GetTickCount(): cardinal;
function CheckWeaponAllowed(WeaponNum: byte): boolean;
function Chr(Character: byte): char;
function LogN(base, value:Extended):Extended;
procedure RaiseLastException;
procedure RaiseException(Ex: TIFException; Param: string);
function ExceptionType: TIFException;
function ExceptionParam: string;
function ExceptionProc: Cardinal;
function ExceptionPos: Cardinal;
function ExceptionToString(er: TIFException; Param: string): string;