lsfs_16-bit/driver/disk.h

int data_from_disk(index, number_sectors, data_buffer, data_buffer_segment);
int disk_service_read_data_from_disk(index, number_sectors, data_buffer, data_buffer_segment);

int disk_service_read_data_from_disk(index, number_sectors, data_buffer, data_buffer_segment)
long index; 
long number_sectors; 
void* data_buffer;
unsigned int data_buffer_segment;
{

	#asm
	#define index 4[bp]; /* Note that this is a 32-bit argument. */
    #define number_sectors 8[bp];
    #define data_buffer 12[bp];
    #define data_buffer_segment 14[bp];
	
	push bp
    mov bp,sp
	pusha
	lsfs_load_data:
	    mov ax, index
	    mov WORD [DAPACK.lba_addr_dw_low], ax
	    mov bx, number_sectors
	    mov WORD [DAPACK.blkcnt],          bx
	    mov cx, data_buffer_segment  
	    mov WORD [DAPACK.db_addr_segment], cx
	    mov dx, data_buffer;
	    mov WORD [DAPACK.db_addr_offset],  dx
	    mov si, #DAPACK                          ; address of
	    mov ah, #0x42                            ; READ
	    mov dl, [global_disk_identifier] 
	    int #0x13
	popa
	pop bp
	ret


	DAPACK:
	  DAPACK.dap_Size:         db  0x10 
	  DAPACK.rev_byte:         db  0x0  
	  DAPACK.blkcnt:           dw  0x0  
	  DAPACK.db_addr_offset:   dw  0x0  
	  DAPACK.db_addr_segment:  dw  0x0  
	  DAPACK.lba_addr_dw_low:  dd  0x0  
	  DAPACK.lba_addr_dw_high: dd  0x0  
	
	global_disk_identifier: db 0x80

	#endasm
}