Category : Files from Magazines
Archive   : MAR92.ZIP
Filename : 3N03024A

 
Output of file : 3N03024A contained in archive : MAR92.ZIP
#include
#include
#include

#pragma pack(1)

typedef struct { // format of device list entries
unsigned char unit;
unsigned short dev_header_offset;
unsigned short dev_header_segment;
} dev_list;

main()
{
union REGS r;
struct SREGS sr;
dev_list *dl;

// ask MSCDEX for # of CD drives
r.x.ax = 0x1500;
r.x.bx = 0;
int86(0x2f, &r, &r);
if (!r.x.bx)
{
printf("MSCDEX not installed or no CD drives\n");
exit(1);
}

// allocate memory for device list
if (dl = (dev_list *) malloc(r.x.bx * sizeof (dev_list)))
{ // fill allocated memory with device list
segread(&sr);
sr.es = sr.ds;
r.x.bx = (unsigned int) dl; // list addr to es:bx
r.x.ax = 0x1501;
int86x(0x2f, &r, &r, &sr); // ask MSCDEX for driver lst
if (!r.x.cflag)
printf("Address of 1st CD-ROM header:%04X:%04X\n",
dl->dev_header_segment, dl->dev_header_offset);
else

printf("Error from MSCDEX!\n");
}
else
printf("Unable to allocate memory!\n");
}

/* End of File */



  3 Responses to “Category : Files from Magazines
Archive   : MAR92.ZIP
Filename : 3N03024A
”

  1. Daniel says:
    January 27, 2013 at 3:59 pm

    Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. Joshie says:
    March 18, 2014 at 4:57 pm

    This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. DiskingRound says:
    January 14, 2015 at 10:57 pm

    But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/