; AX = key pressed
os_read_input:
	mov ah, 11h			; BIOS call to check for key
	int 16h				; Interrupt
	jnz .key_pressed		; Jump if input isn't 0

	hlt
	jmp os_read_input

.key_pressed:
	mov ah, 10h
	int 16h
	ret

; -------------------------------------------

os_display_input:
	pusha
	mov cx, [prompt_length]

.loop:
	call .check_key_pressed

	jmp .loop

.check_key_pressed:
	call os_read_input

	cmp al, 08h
	je .backspace

	cmp al, 0Dh
	je .enter_key

	cmp al, 1Bh
	je .esc_key

	cmp cx, 0
	jb .check_key_pressed

	call .print_current_input
	dec cx
	jmp .check_key_pressed

.esc_key:
	call power_reboot

.enter_key:
	mov al, 0
	stosb
	popa
	call os_read_cli

.backspace:
	call .move_cursor_back			; then .move_cursor_back
	call .loop				; Else .loop

.move_cursor_back:
	mov ah, 0Eh

	mov al, 08h
	int 10h
	mov al, 20h
	int 10h
	mov al, 08h
	int 10h

	dec di
	jmp os_display_input

.print_current_input:
	stosb

	mov ah, 0Eh
	int 10h

	ret