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0044_Available Drives.pas
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Pascal/Delphi Source File
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1993-09-26
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2KB
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48 lines
(*
===========================================================================
BBS: Canada Remote Systems
Date: 08-29-93 (15:41) Number: 36579
From: KENT BRIGGS Refer#: NONE
To: HOWARD HUANG Recvd: NO
Subj: CHECK AVAILABLE DRIVES Conf: (1221) F-PASCAL
---------------------------------------------------------------------------
-=> Quoting Howard Huang to All <=-
HH> Does anyone know how to check if a drive is valid without accessing
HH> it to see? For example, if the available drives on a system are: A, B,
HH> C, E. How do you check if drive A is installed without having the
HH> floppy drive lights go on. I use TP6, so if you include a sample code,
HH> could you make it compatible with it.
Howard, here's what I use:
*)
program show_drives;
uses dos;
var
reg: registers;
drv: array[1..3] of byte;
drvlist: string[26];
fcb: array[1..37] of byte;
i: integer;
begin
drvlist:='';
for i:=1 to 26 do {Try drives A..Z}
begin
drv[1]:=i+64; {A=ASCII 65, etc}
drv[2]:=ord(':');
drv[3]:=0;
reg.ax:=$2906; {DOS function 29h = Parse Filename}
reg.si:=ofs(drv[1]); {Point to drive string}
reg.di:=ofs(fcb[1]); {Point to File Control Block}
reg.ds:=dseg;
reg.es:=dseg;
msdos(reg); {DOS Interrupt}
if reg.al<>$ff then drvlist:=drvlist+chr(i+64);
end;
writeln('Available drives = ',drvlist);
end.
___ Blue Wave/QWK v2.12
--- Renegade v07-17 Beta
* Origin: Snipe's Castle BBS, Waco TX (817)-757-0169 (1:388/26)