MAC address From Dos

[chaand]

hai all,
how we can get the MAC address of NIC card from pure DOS.
i need C or C++ or Assembly program to find the MAC address.
bye
chaand

[carbonBased]

I would imagine this would be different for each brand of network card, and yes, I would imagine some ammount of assembly would be required.

Not much of an answer, I know, but I don't believe there is just _one_ answer.

Cheers,
Jeff

[chaand]

Dear Jeff,

yes, i find an interrupt to get the mac address. but it is not working
the interrupt is 0x60
and ah = 6
and cx = 6
es:di seg and offset of an unsigned char's arrary of 6 size

but this not working

do you know something more about this

regards,

chaand

[chaand]

Hello i got the answer form the following c program provided netbios interface is loaded into your dos machine

/*
GETMAC.C
--------
A small program for determining the Network Adapter ID using
the NetBIOS interface.

Coded by Dzu Trinh Dac Nguyen
*/

#include <dos.h>
#include <string.h>
#include <mem.h>
#include <stdio.h>

typedef unsigned char BYTE;
typedef unsigned int WORD;
typedef int BOOL;
#define FALSE 0
#define TRUE 1

typedef struct tagNCB
{
BYTE NCB_COMMAND;
BYTE NCB_RETCODE;
BYTE NCB_LSN;
BYTE NCB_NUM;

void far * NCB_BUFFER_PTR;

WORD NCB_LENGTH;
BYTE NCB_CALLNAME[16];
BYTE NCB_NAME[16];
BYTE NCB_RTO;
BYTE NCB_STO;

void interrupt ( * postfunc)(void);
BYTE NCB_LANA_NUM;
BYTE NCB_CMD_CPLT;
BYTE NCB_RESERVED[14];
} NCB;

typedef struct tagNAME_TABLE
{
char tbl_name[16];
BYTE tbl_name_number;
        BYTE tbl_name_status;
} NAME_TABLE;

typedef struct tagADAPTER_STATUS
{
BYTE card_id[6];
BYTE unknown[52];
int name_count;
NAME_TABLE      name_table[20];
} ADAPTER_STATUS;

BYTE   NETBIOS(NCB far * ncb)
{
struct SREGS sr;
union REGS r;

sr.es = FP_SEG(ncb);
r.x.bx = FP_OFF(ncb);
r.x.ax = 0x0100;
int86x(0x5C, &r, &r, &sr);
return ncb->NCB_CMD_CPLT;
}

BOOL netbiosInstalled()
{
NCB test_ncb;
void interrupt ( * test)(void);

test = _dos_getvect(0x5C);
if (test == (void far *) NULL)
return FALSE;

memset(&test_ncb, 0, sizeof(NCB));
test_ncb.NCB_COMMAND = 0x7F;
NETBIOS(&test_ncb);

if (test_ncb.NCB_RETCODE != 0x03)
return FALSE;

return TRUE;
}

BYTE netbiosGetAdapterStatus(char far * buffer, int len)
{
NCB ncb;
memset(&ncb, 0, sizeof(NCB));
strcpy(ncb.NCB_CALLNAME, "*");
ncb.NCB_COMMAND = 0x33;
ncb.NCB_LENGTH = len;
ncb.NCB_BUFFER_PTR = buffer;
return NETBIOS(&ncb);
}

void main(void)
{
ADAPTER_STATUS as;

if (netbiosInstalled())
{
if (0 == netbiosGetAdapterStatus((char far *) &as, sizeof(ADAPTER_STATUS)))
{
printf( "Adapter ID: %02X.%02X.%02X.%02X.%02X.%02X\n",
as.card_id[0], as.card_id[1], as.card_id[2],
as.card_id[3], as.card_id[4], as.card_id[5]);
}
else
printf("Error reading the network adapter address.\n");
}
else
printf("NetBIOS is not installed.\n");
}