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dial.pas
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Pascal/Delphi Source File
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1988-03-25
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1KB
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63 lines
(*
* Usage: DIAL xxx-xxxx
*)
program Dial;
{dials number on command line to Hayes compatible modem on COM1}
const
Com_Base = $3F8; {Use 3F8 for COM1, 2F8 for COM2}
{Offsets from Com_Base for async control ports }
RX = 0; {Receiver Buffer Register }
TX = 0; {Transmitter Buffer Register }
LC = 3; {Line Control Register }
MC = 4; {Modem Control Register }
LS = 5; {Line Status Register }
DLL = 0; {Divisor Latch, Low Order Byte }
DLH = 1; {Divisor Latch, High Order Byte}
No_Parity = $03;
type
anystring = string[80];
procedure send(command: anystring);
var
P: integer;
C: char;
I: integer;
begin
{send string to modem}
for P := 1 to length(command) do
begin
C := command[P];
Port[com_base+TX] := C;
repeat
until Port[com_base+LS] >= $20;
P := Succ(P);
I := 0;
repeat
I := Succ(I);
until I >= 1000;
end;
end;
begin
{init modem}
Port[com_base+LC] := $83; {Set baud rate, No parity, 8 bits}
Port[com_base+DLL] := 96; {1200 baud}
Port[com_base+DLH] := 0;
Port[com_base+LC] := No_Parity;
Port[com_base+MC] := $03; {Turn ON DTR and RTS}
{set up modem control string}
send('ATDT' + paramstr(1) + ^M);
end.