Simply small font - changes the font of Epson printers

{ SMF.PAS                   Copyright (c) TrSek alias Zdeno Sekerak }
{ Simply small font - zmeni font na tlaciarnach Epson               }
{ LPT[x] - port na ktory mam vyslat znaky LPT1, LPT2, LPT3          }
{ 1..4   - ako zmensit                                              }
{          1 - na vysku  2 - na sirku                               }
{          3 - aj na vysku aj na sirku 4 - normal                   }
{                                                                   }
{ Datum:22.04.1996                             http://www.trsek.com }
 
program ecs;
uses crt,dos;
var f:text;
 
procedure write_l(text:string);
var ch:char;
begin
 repeat
  ch:='p';
  {$I-}
  write(f,text);
  {$I+}
  if IOResult<>0 then begin
     writeln;
     writeln('Chyba tlaciarne, alebo tlaciaren nie je pripravena.');
     textcolor(YELLOW);
     writeln('Opakovat  Nechat_tak');
     textcolor(WHITE);
     ch:=readkey;
     end;
 until (not(UpCase(ch) in ['O',#13]));
end;
 
begin
 if paramcount<1 then begin
     writeln('Simply small font na tlaciaren EPSON              Software by TRSEK');
     writeln('-------------------------------------------------------------------');
     writeln('SMF LPT[x] [1..4]');
     writeln;
     writeln(' LPT[x] - port na ktory mam vyslat znaky LPT1, LPT2, LPT3, COM1 atd');
     writeln(' 1..4   - ako zmensit  1 - na vysku  2 - na sirku                  ');
     writeln('                       3 - aj na vysku aj na sirku 4 - normal      ');
    end
   else begin
    assign(f,paramstr(1));
    rewrite(f);
 
    if (paramstr(2)='1') or (paramstr(2)='3') then
       write_l(chr(27)+chr(83)+chr(1));                 { na vysku }
 
    if (paramstr(2)='2') or (paramstr(2)='3') then
       write_l(chr(27)+chr(33)+chr(4));                 { na sirku }
 
    if (paramstr(2)='4') then
       write_l(chr(27)+chr(83)+chr(1)+chr(27)+chr(33)+chr(4)); { default }
    close(f);
   end;
end.