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SWAGA_C
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COMM.SWG
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0042_Check ALL COM ports.pas
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Pascal/Delphi Source File
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1994-02-15
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2KB
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92 lines
PROGRAM ComChk;
USES Crt;
FUNCTION HexWord(a : Word) : String;
CONST
Digit : ARRAY[$0..$F] OF Char = '0123456789ABCDEF';
VAR
I : Byte;
HexStr : String;
BEGIN
HexStr := '';
FOR I := 1 TO 4 DO
BEGIN
Insert(Digit[a AND $000F], HexStr, 1);
a := a SHR 4
END;
HexWord := HexStr;
END; {hex}
PROCEDURE UncodePort(NR : integer);
VAR
B, M, V1, V2, TLRC, D, MSB, LSB : integer;
S, CO : integer;
Baud : real;
Answer : string[10];
ComList : array[1..4] OF word ABSOLUTE $0000:$0400;
BEGIN
CO := ComList[NR];
WriteLn;
WriteLn ('Communications Port ', NR, ':');
IF CO = 0 THEN
BEGIN
WriteLn (' Not installed.');
Exit;
END;
S := Port[CO + 3];
TLRC := Port[CO + 3];
Port[CO + 3] := TLRC OR $80;
LSB := Port[CO];
MSB := Port[CO + 1];
D := 256 * MSB + LSB;
Baud := 115200.0 / D;
Port[CO + 3] := TLRC AND $7F;
{Display port address}
WriteLn (' Port address: ', HexWord (ComList[NR]));
{Display baud rate}
WriteLn (' Baud rate: ', Baud:5:0);
{Display data bits}
IF (S AND 3) = 3 THEN
B := 8
ELSE IF (S AND 2) = 2 THEN
B := 7
ELSE IF (S AND 1) = 1 THEN
B := 6
ELSE
B := 5;
WriteLn (' Data bits: ', B:5);
{Display stop bits}
IF (S AND 4) = 4 THEN
B := 2
ELSE
B := 1;
WriteLn (' Stop bits: ', B:5);
IF (S AND 24) = 24 THEN
Answer := 'Even'
ELSE IF (S AND 8) = 8 THEN
Answer := 'Odd'
ELSE
Answer := 'None';
WriteLn (' Parity: ', Answer:5);
END; {procedure Uncode_Setup_Of_Port}
BEGIN
ClrScr;
WriteLn ('Communications Port Status--------------------------');
UncodePort (1);
UncodePort (2);
UncodePort (3);
UncodePort (4);
END.