Category : Communication (modem) tools and utilities
Archive   : 16550.ZIP
Filename : 16550.PAS

 
Output of file : 16550.PAS contained in archive : 16550.ZIP
(*****************************************************************************)
(* *)
(* 16550 - A TPBoard Sysop Utility *)
(* *)
(* by *)
(* Jon Schneider & Rick Petersen *)
(* *)
(* *)
(* This program will toggle the state of a 16550 UART's FIFO buffer. *)
(* It only seems to work with the Fossil driver X00.SYS version 1.09b. *)
(* By toggling the buffer ON, even 4.77 Mhz PC's are able to receive *)
(* files at a fixed rate of 19,200 baud without error. *)
(* *)
(* The code uses portions of the 'Turbo Professional' library. It *)
(* will not compile without it. *)
(* *)
(*****************************************************************************)



{$R-} {Range checking off}
{$B-} {Boolean complete evaluation off}
{$S-} {Stack checking off}
{$I+} {I/O checking on}
{$N-} {No numeric coprocessor}
{$M $4000, $4000, $A0000}


program a16550;


Uses
Crt, TpString;

var
num_params : Integer;
input_byte : Byte;
state : String;
cmd_tail : Boolean;
com_port : Word;


Procedure usage;

begin
Writeln;
WriteLn('16550 - A TPBoard utility for toggling the 16550''s FIFO buffer');
WriteLn;
WriteLn('USAGE: 16550 [1-4] [on/off/?]');
WriteLn;
WriteLn(' Where ''1'' thru ''4'' is the COM port, ''on'' or ''off'' will toggle');

WriteLn(' the FIFO buffer''s state, and ''?'' will show it''s status. Turning');
WriteLn(' the buffered mode on is guaranteed to lock up your system if you');
WriteLn(' are using OpusCom, and may cause problems with other programs.');
WriteLn(' It WILL work with X00 version 1.09b, TPBoard, and ProComm Plus.');
WriteLn;
Halt
end;


begin { 16550 }
CheckBreak := False;
num_params := ParamCount;
cmd_tail := num_params = 2;
if (not cmd_tail) then
usage;
if ParamStr(1) = '1' then
com_port := $3fa
else if ParamStr(1) = '2' then
com_port := $2fa
else if ParamStr(1) = '3' then
com_port := $3ea
else if ParamStr(1) = '4' then
com_port := $2ea
else
usage;
state := StUpcase(ParamStr(2));
if state = 'ON' then
Port[com_port] := $07
else if state = 'OFF' then
Port[com_port] := $00
else if state = '?' then
begin
WriteLn;
input_byte := Port[com_port];
input_byte := input_byte and $c0;
Write('FIFO buffer is turned ');
if input_byte = $c0 then
WriteLn('ON.')
else
WriteLn('OFF.');
end
else
usage;
WriteLn;
end. { of 16550.Pas }




  3 Responses to “Category : Communication (modem) tools and utilities
Archive   : 16550.ZIP
Filename : 16550.PAS

  1. Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

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