; IN	DL	drive number
;	BP	ptr to bpb_size'd buffer
bpb_load:
  push ax
  push dx

  mov [bp+(bpb_size-1)], dl

  ; load first sector
  xor dx, dx
  xor ax, ax
  call drive_read

  push cx
  push si
  push di

  ; copy BPB to BP
  mov si, (diskbuf+0x0B)
  mov di, bp
  mov cx, (bpb_size-1)
  rep movsb

  pop di
  pop si
  pop cx

  pop dx
  pop ax
  ret