[bits 16]

i_disk16_error_message: db "Disk read error!", 0

disk16_load:
	push dx  ; keep track of the # of sectors requested to be read

	mov ah, 0x02  ; bios read sector
	mov al, dh  ; read dh # sectors
	mov ch, 0x00  ; select cylinder 0
	mov dh, 0x00  ; select head 0
	mov cl, 0x02  ; start reading from 2nd sector
				  ;  (i.e. the sector after the boot sector)

	int 0x13  ; bios interrupt to trigger read

	jc disk16_on_error  ; jump if carry (fault) flag was set

	pop dx  ; restore original # of registers in case it was modified
	cmp dh, al  ; compare # sectors read (al) to # sectors expected (dh)
	jne disk16_on_error  ; error if # sectors differs
	ret

disk16_on_error:
	mov bx, i_disk16_error_message
	call print16
	jmp g_infinite_loop