Gaining information about hardware 1

SmileeTiger · May 16, 2000

Hi, I am attempting to gain information about the CD-ROM drive using some assembly code in VC++ the followinf code is what I have found on the MSDN site with some minor modifications. #include <windows.h> #include <string.h> #include <iostream.h> BOOL IsCDRomDrive (short nDrive); BOOL IsCDRomDrive (short nDrive)    {    BOOL bResult = FALSE;      // Assume not a CD-ROM drive    __asm {    mov  ax, 150Bh       // MSCDEX CD-ROM Drive Check          xor  bx, bx          mov  cx, nDrive          int  2Fh          cmp  bx, 0ADADh      // Check MSCDEX signature          jne  not_cd_drive          or   ax, ax          // Check the drive type          jz   not_cd_drive    // 0 (zero) means not CD-ROM          mov  bResult, TRUE       not_cd_drive:          }    return (bResult);    } void main() { //I am just using '1' here as a sample drive if (IsCDRomDrive(1)) { cout << "Yup"; } cout << "end"; } When I sun the code I get an access violation and I don't recieve the information I need. Does anyone have any ideas how to get this code working or can you suggest a differet approach to take? Cory M Hicks

SmileeTiger · May 16, 2000

Some background. My goal is to retrieve some information about the hardware in a users system (specifically the serial number on various parts of the hardware (ie HDD, BIOS, mother board)) using VC++ from what I learned from the MSDN site the best way to get this was using __asm in Visual C++. If anyone could suggest another way to do this let me know. Cory

zBuilder · May 16, 2000

Assuming you are doing this under 32bit Windows, use the Windows API function GetDriveType as described below: The GetDriveType function determines whether a disk drive is a removable, fixed, CD-ROM, RAM disk, or network drive. UINT GetDriveType(     LPCTSTR lpRootPathName // address of root path   &nbsp

; Parameters lpRootPathName Points to a null-terminated string that specifies the root directory of the disk to return information about. If lpRootPathName is NULL, the function uses the root of the current directory. Return Values The return value specifies the type of drive. It can be one of the following values: Value Meaning 0 The drive type cannot be determined. 1 The root directory does not exist. DRIVE_REMOVABLE The drive can be removed from the drive. DRIVE_FIXED The disk cannot be removed from the drive. DRIVE_REMOTE The drive is a remote (network) drive. DRIVE_CDROM The drive is a CD-ROM drive. DRIVE_RAMDISK The drive is a RAM disk. <a href=mailto:Kim_Christensen@telus.net>Kim_Christensen@telus.net</a> <a href=

http://www3.bc.sympatico.ca/Kim_Christensen/index.html>Home

Page</a>

SmileeTiger · May 17, 2000

So something like this should be fine then? I tested it on my system and it seems to be working fine #include "stdafx.h" #include <windows.h> #include <string.h> #include <iostream.h>    // Return values of GetDriveType(). #define EX_DRIVE_INVALID    1 #define EX_DRIVE_FLOPPY     2 #define EX_DRIVE_FIXED      3 #define EX_DRIVE_REMOTE     4 #define EX_DRIVE_CDROM      5 #define EX_DRIVE_REMOVABLE  6 #define EX_DRIVE_RAMDISK    7 int main(int argc, char* argv[]) { //The letter of the drive char *drive;="a:"; UINT test; test=GetDriveType(drive); //Determines what kind of drive it is. switch (test) { case EX_DRIVE_FIXED: cout << "EX_DRIVE_FIXED"; break; case  EX_DRIVE_INVALID: cout << "EX_DRIVE_INVALID"; break; case EX_DRIVE_REMOTE: cout << "EX_DRIVE_REMOTE"; break; case EX_DRIVE_REMOVABLE: cout << "EX_DRIVE_REMOVABLE"; break; case  EX_DRIVE_CDROM: cout << "EX_DRIVE_CDROM"; break; case EX_DRIVE_FLOPPY: cout << "EX_DRIVE_FLOPPY "; break; case EX_DRIVE_RAMDISK: cout << "EX_DRIVE_RAMDISK"; break; default: cout << "Nope doesn't work"; }     return 0; } I am also trying to get the serial numbers from some of the hardware i a users system using the API calls win32_logicaldisk, win32_bios and win32_mainboard. There does not seem to be any information regarding these calls on the net. DO you have any idea where to look?? Cory M Hicks

zBuilder · May 17, 2000

Looks ok to me, though DRIVE_REMOVABLE etc are already defined in winbase.h (On my compiler anyways). But your way will work also. As for the API calls win32_logicaldisk, win32_bios and win32_mainboard, I really don't know. My compiler's help files have no reference to these. Maybe if you post the above in the "C++: Borland (Inprise)" forum someone may know. I don't think there is a WinAPI forum, but then again I may have missed it. <a href=mailto:Kim_Christensen@telus.net>Kim_Christensen@telus.net</a> <a href=

http://www3.bc.sympatico.ca/Kim_Christensen/index.html>Home

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zBuilder · May 23, 2000

SmileeTiger: I was just surfing around today and stumbled accross the following page that might be of interest to you: <A HREF="

http://www.r2m.com/win-developer-FAQ/misc/1.html"

TARGET="_new">

http://www.r2m.com/win-developer-FAQ/misc/1.html</A>

<a href=mailto:Kim_Christensen@telus.net>Kim_Christensen@telus.net</a> <a href=

http://www3.bc.sympatico.ca/Kim_Christensen/index.html>Home

Page</a>

SmileeTiger · May 24, 2000

That is great stuff. Too bad GlobalDosAlloc only works in windows 3.1 otherwise this would do EXACTLY what I wanted. Thanks anyways, Cory

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Gaining information about hardware 1

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