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Code: Select all

void send_command(unsigned int number, unsigned int flags)
{
	switch (number)
	{
		case ATA_IDENTIFY:
		{
                                      ....
                                      .... 
			unsigned char status = inportb(ATA_COMMAND(controller));
			if (status == 0)
			{
				puts("Drive does not exist.");
			}
			unsigned char st[32] = { '\0' };
			while ((status = inportb(ATA_COMMAND(controller))) & (1 << ATA_BSY))
			{
				;
			}
			
		}
	}
}

Code: Select all

			while ((status = inportb(ATA_COMMAND(controller))) & (1 << ATA_BSY))
			{
				;
			}

Code: Select all

...
...
...
...
...
                                      int i;
			unsigned char selector = (flags & (1 << ATA_SLAVE)) ? 0xB0 : 0xA0;
			unsigned char controller = (flags & (1 << ATA_CONTROLLER)) ? PRIMARY_BASE : SECONDARY_BASE;
                                       i=10000;  
                                      while ((inportb(ATA_COMMAND(controller))!=0x50)&&(i>0)) {  i--; };
			outportb(ATA_DRIVE(controller), selector);
			outportb(ATA_SECTOR_COUNT(controller), 0);
			outportb(ATA_SECTOR_NUM(controller), 0);
			outportb(ATA_CYLINDER_LOW(controller), 0);
			outportb(ATA_CYLINDER_HI(controller), 0);
			outportb(ATA_COMMAND(controller), 0xEC);
			unsigned char status = inportb(ATA_COMMAND(controller));
			if (status == 0)
			{
				puts("Drive does not exist.");
			}
			unsigned char st[32] = { '\0' };
			i=10000;  
                                      while ((inportb(ATA_COMMAND(controller))!=0x58)&&(i>0)) {  i--; };

...
...
...
...
...
send_command(ATA_IDENTIFY, (1 << ATA_CONTROLLER));
asm {
	mov dx,0x1f0 // or 0x170 or what ever ... (you chage this with your consts/var...)
	mov edi,[pointer_to_your_data_structure]
	mov ecx,255 
	cld
	rep insw // finally read :)
}
//(if it returns "trash" it means no HD at that position (try another IDE slot, MASTER/SLAVE) )

Code: Select all

Type ide_prop Field=1 'This record is returned BY IDE when IDETIFY drive command is send to 0x1f7/0x177.
	id1 As UShort '0
	cylinders As UShort '1
	id2 As UShort '2
	heads As UShort '3
	id3(1 To 2) As UShort '4
	sect_per_track As UShort '6
	id4(1 To 3) As UShort '7->9
	serial_number As String * ((19-10+1)*2) '10 -> 19
	controller_type As Ushort '20
	controller_buffer_size As Ushort '21 -> realsize = (dword) bufsize*512  
	ecc_transferred As UShort '22
	controller_number As String * ((26-23+1)*2) '23->26	
	model_number As String*((46-27+1)*2) '27->46
	num_sect_per_int As ushort '47
	dword_trasfer_flag As UShort   '48	
End Type
'ide=ide slot number (0/1) ; typ = (master=0)/(slave=1)
Function get_ide_info(ide As Integer,typ As Integer,buf As ide_prop Ptr) As Integer
Dim As Integer i
Dim As UShort ptr dd=callocate(256*2)
dim as ubyte w
Dim As Any Ptr p
If ide = 0 Then
	w = (&h0a+cast(ubyte,typ))*&h10+&h40
	p = dd
 	Asm
 		push ax
 		push dx
 		push ecx
 		mov ecx,10000
 		mov dx,&h1f7
 		_redo_f1:
                 mov dx,&H1f1
                 in al,dx
                 mov dx,&H1f7
                 in al,dx
 		dec ecx
 		jecxz _ok_time_to_go_OUT
 		in al,dx
 		cmp al,&h50   '{wait until controller not busy}
 		jne _redo_f1
 		_ok_time_to_go_OUT: ':))
 		mov al,[w]
 		mov dx,&h1f6
 		Out dx,al
 		mov al,&hec
                mov dx,&h1f7
 		Out dx,al
 		mov ecx,10000
 		_redo_f2:
                 mov dx,&H1f1
                 in al,dx
                 mov dx,&H1f7
                 in al,dx
                dec ecx
 		jecxz _OK_now_realy_is_time_to_END
 		in al,dx
 		cmp al,&h58 ' {wait for data ready} :))
 		jne _redo_f2
		jmp short teora3
 		_OK_now_realy_is_time_to_END:
		pop ecx
		pop dx
		pop ax
		end asm
		function=0
		exit function
		asm
		teora3:
		mov dx,&h1f0
		mov edi,[p]
		mov ecx,255
		cld
                push edi
		rep insw ' finally read :)
                pop edi
		pop ecx
		pop dx
		pop ax
	End asm       
   movsb1(dd,buf,SizeOf(ide_prop)) ':))
   Function = 1
    dealloc2 @dd
ElseIf ide=1 Then
	w = (&h0a+cast(ubyte,typ))*&h10+&h40
	p = dd
 	Asm
 		push ax
 		push dx
 		push ecx
 		mov ecx,10000
 		_redo_f12:
                 mov dx,&H171
                 in al,dx
                 mov dx,&H177
                 in al,dx
                dec ecx
                jecxz _ok_time_to_go_OUT2
                in al,dx
                cmp al,&h50   '{wait until controller not busy}
                jne _redo_f12
                _ok_time_to_go_OUT2: ':))
                mov al,[w]
                mov dx,&h176
                Out dx,al
                mov al,&hec
                mov dx,&h177
                Out dx,al
                mov ecx,10000
                _redo_f22:
                 mov dx,&H171
                 in al,dx
                 mov dx,&H177
                 in al,dx
                dec ecx
 		jecxz _OK_now_realy_is_time_to_END2
 		in al,dx
 		cmp al,&h58 ' {wait for data ready} :))
 		jne _redo_f22
		jmp short teora4
 		_OK_now_realy_is_time_to_END2:
		pop ecx
		pop dx
		pop ax
		end asm
		function=0
		exit function
		asm
		teora4:
		mov dx,&h170
		mov edi,[p]
		mov ecx,255
		cld
                push edi
		rep insw ' finally read :)
                pop edi
		pop ecx
		pop dx
		pop ax
	End asm       
   movsb1(dd,buf,SizeOf(ide_prop)) ':))
   Function = 1
   dealloc2 @dd
endif
End function