diff --git a/rtl/inc/astrings.inc b/rtl/inc/astrings.inc
index beef6d4a84..7ef49249f5 100644
--- a/rtl/inc/astrings.inc
+++ b/rtl/inc/astrings.inc
@@ -1190,6 +1190,30 @@ end;
 
 {$endif CPU64}
 
+{$if defined(CPU16) or defined(CPU8)}
+Procedure fpc_AnsiStr_LongWord(v : LongWord;Len : SizeInt; out S : RawByteString{$ifdef FPC_HAS_CPSTRING};cp : TSystemCodePage{$endif FPC_HAS_CPSTRING});[Public,Alias : 'FPC_ANSISTR_LONGWORD']; compilerproc; {$IFNDEF VER2_0} Inline; {$ENDIF}
+Var
+  SS : ShortString;
+begin
+  str(v:Len,SS);
+  S:=SS;
+  {$ifdef FPC_HAS_CPSTRING}
+  SetCodePage(s,cp,false);
+  {$endif FPC_HAS_CPSTRING}
+end;
+
+Procedure fpc_AnsiStr_LongInt(v : LongInt; Len : SizeInt; out S : RawByteString{$ifdef FPC_HAS_CPSTRING};cp : TSystemCodePage{$endif FPC_HAS_CPSTRING});[Public,Alias : 'FPC_ANSISTR_LONGINT']; compilerproc; {$IFNDEF VER2_0} Inline; {$ENDIF}
+Var
+  SS : ShortString;
+begin
+  str (v:Len,SS);
+  S:=SS;
+  {$ifdef FPC_HAS_CPSTRING}
+  SetCodePage(s,cp,false);
+  {$endif FPC_HAS_CPSTRING}
+end;
+{$endif CPU16 or CPU8}
+
 Procedure Delete(Var S : RawByteString; Index,Size: SizeInt);
 Var
   LS : SizeInt;
diff --git a/rtl/inc/compproc.inc b/rtl/inc/compproc.inc
index b00832afdc..da4776b2f6 100644
--- a/rtl/inc/compproc.inc
+++ b/rtl/inc/compproc.inc
@@ -125,6 +125,25 @@ procedure fpc_AnsiStr_Currency(c : currency;len,fr : SizeInt;out s : RawByteStri
     procedure fpc_UnicodeStr_int64(v : int64;len : SizeInt;out s : UnicodeString); compilerproc;
   {$endif FPC_HAS_FEATURE_WIDESTRINGS}
 {$endif CPU64}
+{$if defined(CPU16) or defined(CPU8)}
+  procedure fpc_shortstr_longword(v : longword;len : SizeInt;out s : shortstring); compilerproc;
+  procedure fpc_shortstr_longint(v : longint;len : SizeInt;out s : shortstring); compilerproc;
+  procedure fpc_chararray_longword(v : longword;len : SizeInt;out a : array of char); compilerproc;
+  procedure fpc_chararray_longint(v : longint;len : SizeInt;out a : array of char); compilerproc;
+  {$ifdef FPC_HAS_FEATURE_ANSISTRINGS}
+  procedure fpc_ansistr_longword(v : longword;len : SizeInt;out s : RawByteString{$ifdef FPC_HAS_CPSTRING};cp : TSystemCodePage{$endif FPC_HAS_CPSTRING}); compilerproc;
+  procedure fpc_ansistr_longint(v : longint;len : SizeInt;out s : RawByteString{$ifdef FPC_HAS_CPSTRING};cp : TSystemCodePage{$endif FPC_HAS_CPSTRING}); compilerproc;
+  {$endif FPC_HAS_FEATURE_ANSISTRINGS}
+
+  {$ifdef FPC_HAS_FEATURE_WIDESTRINGS}
+    {$ifndef FPC_WIDESTRING_EQUAL_UNICODESTRING}
+    procedure fpc_widestr_longword(v : longword;len : SizeInt;out s : widestring); compilerproc;
+    procedure fpc_widestr_longint(v : longint;len : SizeInt;out s : widestring); compilerproc;
+    {$endif ndef FPC_WIDESTRING_EQUAL_UNICODESTRING}
+    procedure fpc_UnicodeStr_longword(v : longword;len : SizeInt;out s : UnicodeString); compilerproc;
+    procedure fpc_UnicodeStr_longint(v : longint;len : SizeInt;out s : UnicodeString); compilerproc;
+  {$endif FPC_HAS_FEATURE_WIDESTRINGS}
+{$endif CPU16 or CPU8}
 {$ifdef FPC_HAS_FEATURE_WIDESTRINGS}
   {$ifndef FPC_WIDESTRING_EQUAL_UNICODESTRING}
     {$ifndef FPUNONE}
diff --git a/rtl/inc/sstrings.inc b/rtl/inc/sstrings.inc
index 2adf56618f..9b8e0707b0 100644
--- a/rtl/inc/sstrings.inc
+++ b/rtl/inc/sstrings.inc
@@ -448,6 +448,23 @@ end;
 
 {$endif CPU64}
 
+{$if defined(CPU16) or defined(CPU8)}
+procedure fpc_shortstr_longword(v : longword;len : SizeInt;out s : shortstring);[public,alias:'FPC_SHORTSTR_LONGWORD']; compilerproc;
+begin
+  int_str_unsigned(v,s);
+  if length(s)<len then
+    s:=space(len-length(s))+s;
+end;
+
+
+procedure fpc_shortstr_longint(v : longint;len : SizeInt;out s : shortstring);[public,alias:'FPC_SHORTSTR_LONGINT'];  compilerproc;
+begin
+  int_str(v,s);
+  if length(s)<len then
+    s:=space(len-length(s))+s;
+end;
+{$endif CPU16 or CPU8}
+
 
 { fpc_shortstr_sInt must appear before this file is included, because }
 { it's used inside real2str.inc and otherwise the searching via the      }
@@ -869,6 +886,42 @@ end;
 {$endif CPU64}
 
 
+{$if defined(CPU16) or defined(CPU8)}
+
+procedure fpc_chararray_longword(v : longword;len : SizeInt;out a : array of char);compilerproc;
+var
+  ss : shortstring;
+  maxlen : SizeInt;
+begin
+  int_str_unsigned(v,ss);
+  if length(ss)<len then
+    ss:=space(len-length(ss))+ss;
+  if length(ss)<high(a)+1 then
+    maxlen:=length(ss)
+  else
+    maxlen:=high(a)+1;
+  fpc_shortstr_chararray_intern_charmove(ss,a,maxlen);
+end;
+
+
+procedure fpc_chararray_longint(v : longint;len : SizeInt;out a : array of char);compilerproc;
+var
+  ss : shortstring;
+  maxlen : SizeInt;
+begin
+  int_str(v,ss);
+  if length(ss)<len then
+    ss:=space(len-length(ss))+ss;
+  if length(ss)<high(a)+1 then
+    maxlen:=length(ss)
+  else
+    maxlen:=high(a)+1;
+  fpc_shortstr_chararray_intern_charmove(ss,a,maxlen);
+end;
+
+{$endif CPU16 or CPU8}
+
+
 {$ifndef FPUNONE}
 procedure fpc_chararray_Float(d : ValReal;len,fr,rt : SizeInt;out a : array of char);compilerproc;
 var
diff --git a/rtl/inc/ustrings.inc b/rtl/inc/ustrings.inc
index 908920de4f..45162e0b60 100644
--- a/rtl/inc/ustrings.inc
+++ b/rtl/inc/ustrings.inc
@@ -1557,6 +1557,28 @@ end;
 {$endif CPU64}
 
 
+{$if defined(CPU16) or defined(CPU8)}
+
+Procedure fpc_UnicodeStr_LongInt(v : LongInt; Len : SizeInt; out S : UnicodeString);compilerproc;
+Var
+  SS: ShortString;
+begin
+  Str (v:Len,SS);
+  S:=UnicodeString(SS);
+end;
+
+
+Procedure fpc_UnicodeStr_LongWord(v : LongWord;Len : SizeInt; out S : UnicodeString);compilerproc;
+Var
+  SS: ShortString;
+begin
+  str(v:Len,SS);
+  S:=UnicodeString(SS);
+end;
+
+{$endif CPU16 or CPU8}
+
+
 function UnicodeToUtf8(Dest: PChar; Source: PUnicodeChar; MaxBytes: SizeInt): SizeInt;{$ifdef SYSTEMINLINE}inline;{$endif}
   begin
     if assigned(Source) then