bits 16
org 0x7c00

; main code
init:
	mov si,mesg
	call puts
	mov di,save
	call gets
	mov si,more
	call puts
	mov si,save
	call puts
	mov si,next
	call puts

; hang around
hang:
	jmp hang

; message
mesg:
	db 13,10,"Enter your name: ",0
more:
	db 13,10,"Hello, ",0
next:
	db "!",13,10,0
save:
	times 20 db 0

; sub-routine to print string pointed by si
puts:
	lodsb
	or al,al
	jz .done
	mov ah,0x0e ; function: display char (tty?)
	int 0x10 ; video display interrupt
	jmp puts
.done:
	ret

; sub-routine to get a string and save to mem pointer by di
gets:
	mov ah,0 ; function: read scancode (blocking)
	int 0x16 ; keyboard interrupt
	cmp al,13
	jz .done
	stosb
	mov ah,0x0e ; function: display char (tty?)
	int 0x10 ; video display interrupt
	jmp gets
.done:
	xor al,al
	stosb
	ret

; filler
	times 510-($-$$) db 0

; the boot signature
	db 0x55,0xAA