Internet Info 1994 March/Internet Info CD-ROM (Walnut Creek) (March 1994).iso/networking/terms/kermit/c/mdsker.p80

Text File | 1988-08-16 | 7.7 KB | 697 lines

 kermit:

do;



declare true literally '0FFH';

declare false literally '00H';



declare port1cmd literally '0F5H';

declare port1dat literally '0F4H';

declare port1clk literally '0F0H';

declare timing1 literally '036H';

declare port2cmd literally '0F7H';

declare port2dat literally '0F6H';

declare port2clk literally '0F1H';

declare timing2 literally '076H';

declare modesel literally '0F3H';

declare reset literally '040H';

declare EnaTxRx literally '025H';

declare tx$rdy literally '01H';

declare rx$rdy literally '02H';



declare null literally '000H';

declare lf literally '0AH';

declare cr literally '0DH';

declare crlf literally 'cr,lf,null';

declare space literally '20H';

declare dollar literally '24H';



declare buflen literally '122';

declare buffer(buflen) byte;

declare (cmdstr, temp, cmdptr, realspeed) address;



declare cmd byte;

declare speed byte public;

declare port byte public;



declare filename address public;



declare debug byte public;





/* here are the subroutines */



co:    procedure(char)external;

    declare char byte;

end co;





ci:    procedure byte external;

end ci;





read:    procedure(jfn, buf, max, count, status)external;

    declare(jfn, buf, max, count, status)address;

end read;





error:    procedure(errnum)external;

    declare(errnum)address;

end error;





exit:    procedure external; end exit;





connect:

    procedure external;

end connect;





send:     procedure byte external;

end send;





recv:    procedure external;

end recv;





newline:

    procedure public;

    call co(13);

    call co(10);

end newline;





spin:    procedure(string)address public;

    declare string address;

        declare char based string byte;



    do while (char <> null) and (char < 021H);

      string = string + 1;

    end;

    return string;

end spin;





strcmp:    procedure(s1,s2)byte public;

    declare(s1,s2)address;

    declare c1 based s1 byte;

    declare c2 based s2 byte;

    declare retval byte;



    retval = 0;

    s1 = spin(s1);

    s2 = spin(s2);

    if not(c1 = c2) then retval = c1 - c2;

    do while (c1 > 0) and (c2 > 0) and (retval=0);

      retval = c1 - c2;

      s1 = s1+1;

      s2 = s2+1;

    end;

    return retval;



end strcmp;





/* TOKEN: returns a pointer to a null-terminated token pointed        */

/* to prior to the call by cmdptr.  after the call, cmdptr points    */

/* to the end of the original string, or the first character after    */

/* the null character replacing the first whitespace after the first    */

/* token.                                */



token:     procedure address public;

    declare result address;

    declare char based cmdptr byte;



    result = 0;

    cmdptr = spin(cmdptr);

    if char <> null then

      do;

        result = cmdptr;

        do while char > ' ';

          cmdptr = cmdptr + 1;

        end;

        if char <> null then

          do;

            char = null;

            cmdptr = cmdptr + 1;

          end;

      end;

    return result;

end token;





nout:    procedure(n) public;

    declare n address;

    declare (quotient, digit, curr) address;

    declare numbuf(20) byte;

    declare index byte;



    if n = 0 then

      do;

        call co('0');

        return;

      end;

    index = 1;

    do while (n > 0);

      digit = n mod 10;

      numbuf(index) = digit+030H;

      index = index + 1;

      n = n / 10;

    end;

    do while ((index := index - 1) > 0);

      call co(numbuf(index));

    end;

end nout;





nin:    procedure(string) address public;

    declare string address;

    declare result address;

    declare c based string byte;



    result = 0;

    if (string <> 0) then do;

      string = spin(string);

      do while (c >= 030H) and (c <= 039H);

        result = result * 10 + (c - 030H);

        string = string + 1;

      end;

    end;

    return result;

end nin;





print:    procedure(msg) public;

    declare msg address;

    declare c based msg byte;



    do while (c > 0) and (c <> '$');

      if c = '\' then

        call newline;

      else

        call co(c);

      msg = msg + 1;

        end;

end print;





/* IOINIT:  this routine takes a port number, 0,1 or 2, and a speed in the   */

/* range 1-4 and initializes the require port to work at the required speed. */

/* The routine returns no parameters.                         */



ioinit:    procedure;

    declare ispeed byte;

    declare baud structure (code(5) byte,

                mult(5) byte)

        data (40H, 10H, 20H, 10H, 08H, 0CFH, 0CFH, 0CEH, 0CEH, 0CEH);



    ispeed = speed - 1;

    if debug then

      do;

         call newline;

         call print(.('initializing serial port',crlf));

      end;

    do case port;

      do;

        if debug then call print(.('port 0 initialized',crlf));

      end;

      do;

        if debug then call print(.('port 1 initialized',crlf));

        output(port1cmd) = reset;

        output(modesel) = timing1;

        output(port1clk) = baud.code(ispeed);

        output(port1clk) = 0H;

        output(port1cmd) = baud.mult(ispeed);

        output(port1cmd) = EnaTxRx;

      end;

      do;

        if debug then call print(.('port 2 initialized',crlf));

        output(port2cmd) = reset;

        output(modesel) = timing2;

        output(port2clk) = baud.code(ispeed);

        output(port2clk) = 0H;

        output(port2cmd) = baud.mult(ispeed);

        output(port2cmd) = EnaTxRx;

      end;

    end;

end ioinit;





usage:    procedure;

    call print(.('usage: kermit (300|1200|2400|4800|9600) (1|2)',crlf));

    call exit;

end usage;





readln:    procedure;

    declare (count, status) address;



    call read(1, .buffer, buflen, .count, .status);

    if status > 0 then

          do;

        call print(.('READLN FAILED',crlf));

        call error(status);

        call exit;

      end;

    buffer(count-2) = 0;

    cmdptr = .buffer;

end readln;







/* *** main program *** */



debug = false;

call readln;



realspeed = 2400;

port = 1;



/* read desired baud rate, if supplied */



temp = token;

if temp > 0 then realspeed = nin(temp);



/* get desired port, if supplied */



temp = token;

if temp > 0 then port = nin(temp);



/* make sure there's garbage on the end of the line */



if token > 0 then call usage;



  if (port < 1) or (port > 2) then call usage;



if realspeed = 9600 then speed = 5;

  else

    if realspeed = 4800 then speed = 4;

      else

        if realspeed = 2400 then speed = 3;

          else

            if realspeed = 1200 then speed = 2;

              else

                if realspeed = 300 then speed = 1;

                  else

                    call usage;



call print(.('Serial port ',null));

call nout(port);

call print(.(', Baud rate ',null));

call nout(realspeed);

call newline;



call ioinit;



do while (true);

    cmdstr = 0;

    do while (cmdstr = 0);

      call print(.('ISIS-Kermit>',null));

      call readln;

      cmdstr = token;

    end;



    if (strcmp(cmdstr,.('connect',null)) = 0) then cmd = 1;

      else

        if (strcmp(cmdstr,.('send',null)) = 0) then cmd = 2;

          else

            if (strcmp(cmdstr,.('receive',null)) = 0) then cmd = 3;

              else

            if (strcmp(cmdstr,.('exit',null)) = 0) then cmd = 4;

              else

            if (strcmp(cmdstr,.('debug',null)) = 0) then cmd = 5;

              else cmd = 0;



    if (cmd <> 2) then

      if token > 0 then

        cmd = 0;



    do case cmd;

      call print(.('Syntax error',crlf));

      call connect;

      do;

        filename = token;

        if (filename = 0) then call print(.('No files specified',crlf));

          else if send then call print(.(cr,lf,'OK',crlf));

            else call print(.('Send failed',crlf));

      end;

      do;

        call recv;

        call print(.(cr,lf,'OK',crlf));

      end;

      call exit;

      debug = not debug;

    end;

end;



end kermit;