mmodem.pas
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{$A+,B+,D-,E+,F+,I+,L+,N-,O+,R-,S+,V-}
unit mmodem;
interface
uses
crt, dos,
{rcg11172000 no overlay under Linux.}
{overlay,}
common,
tmpcom,
myio;
var
p:array[1..2] of integer;
ps:array[1..2] of astr;
procedure cwr(i:integer);
procedure wr(i:integer; c:char);
procedure wrs(i:integer; s:astr);
procedure outmodemstring1(s:astr);
procedure outmodemstring000(s:astr; showit:boolean);
procedure outmodemstring(s:astr);
procedure dophonehangup(showit:boolean);
procedure dophoneoffhook(showit:boolean);
implementation
procedure cwr(i:integer);
begin
tc(12);
ps[i]:=''; p[i]:=0;
case i of
1:begin
cwriteat(2,25,'Telegard:'+#3#14);
for i:=1 to 39 do write(' ');
gotoxy(11,25);
end;
2:begin
cwriteat(50,25,'Modem:'+#3#14);
for i:=1 to 14 do write(' ');
gotoxy(56,25);
end;
end;
end;
procedure wr(i:integer; c:char);
var j:integer;
begin
tc(14);
case i of
1:begin
if (p[i]>37) then begin
for j:=1 to 37 do ps[i][j]:=ps[i][j+1];
ps[i][0]:=chr(37); p[i]:=37;
end;
gotoxy(11,25); write(ps[i]);
end;
2:begin
if (p[i]>14) then begin
for j:=1 to 14 do ps[i][j]:=ps[i][j+1];
ps[i][0]:=chr(14); p[i]:=14;
end;
gotoxy(56,25); write(ps[i]);
end;
end;
ps[i]:=ps[i]+c; inc(p[i]);
write(c);
end;
procedure wrs(i:integer; s:astr);
var j:integer;
begin
for j:=1 to length(s) do wr(i,s[j]);
end;
procedure outmodemstring1(s:astr);
var i:integer;
begin
for i:=1 to length(s) do begin
com_tx(s[i]); wr(1,s[i]);
delay(2);
end;
if (s<>'') then com_tx(^M);
end;
procedure outmodemstring000(s:astr; showit:boolean);
var i:integer;
begin
for i:=1 to length(s) do
case s[i] of
'~':delay(500);
else
begin
com_tx(s[i]);
if (showit) then wr(1,s[i]);
delay(2);
end;
end;
com_tx(^M);
end;
procedure outmodemstring(s:astr);
begin
outmodemstring000(s,TRUE);
end;
procedure dophonehangup(showit:boolean);
var rl:real;
try,rcode:integer;
c:char;
procedure dely(r:real);
var r1:real;
begin
r1:=timer;
while abs(timer-r1)<r do;
end;
begin
if (spd<>'KB') then begin
if (showit) then begin
gotoxy(1,24); tc(12); clreol; write('Hanging up phone...');
cwr(1); cwr(2);
end;
try:=0;
while ((try<6) and (com_carrier) and (not keypressed)) do begin
term_ready(FALSE); dely(2.0); term_ready(TRUE);
if (showit) then begin cwr(1); cwr(2); end;
com_flush_rx;
outmodemstring000(modemr.hangup,showit);
rl:=timer;
while (c<>'0') and (abs(timer-rl)<2.0) do begin
c:=ccinkey1;
if (c<>#0) then
if (c in [#32..#255]) then
if (showit) then wr(2,c);
end;
inc(try);
end;
term_ready(TRUE);
if (keypressed) then c:=readkey;
end;
if (showit) then
if (exist('plogoff.bat')) then
shelldos(FALSE,'plogoff.bat',rcode);
end;
procedure dophoneoffhook(showit:boolean);
var rl1:real;
c:char;
done:boolean;
begin
if (showit) then begin
gotoxy(1,24); tc(12); clreol; write('Taking phone off hook...');
end;
delay(300); com_flush_rx;
if (showit) then begin cwr(1); cwr(2); end;
com_flush_rx; outmodemstring000(modemr.offhook,showit); com_flush_rx;
rl1:=timer; done:=FALSE; c:=#0;
repeat
c:=ccinkey1;
if (c<>#0) then begin
if (c=^M) then done:=TRUE;
if (c in [#32..#255]) then wr(2,c);
end;
until ((abs(timer-rl1)>1.0) or (done)) or (keypressed);
delay(50); com_flush_rx;
tc(11);
if (showit) then begin
gotoxy(1,24); clreol;
gotoxy(1,25); clreol;
end;
end;
end.