BITS 16

start:
	mov ax, 07C0h		; Set up 4K stack space after this bootloader
	add ax, 288		; (4096 + 512) / 16 bytes per paragraph
	mov ss, ax
	mov sp, 4096

	mov ax, 07C0h		; Set data segment to where we're loaded
	mov ds, ax

	mov si, text_string	; Put string position into SI
	call print_string	; Call our string-printing routine

	mov si, name_string
	call print_name

	jmp $			; Infinite loop so that the text is displayed and

	text_string db 'This is my cool new OS! Woohoo!',0
	name_string db 'Chiggins',0

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

exit:
	ret

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

print_string:			; Routine: output string in SI to screen
	mov ah, 0Eh		; int 10h 'print char' function - puts in upper half of AX (AH)

.repeat:
	lodsb			; Get character from string (from SI)
	cmp al, 0		; Places character in lower half of AX (AL)
	je .done		; If char is zero, end of string
	int 10h			; Otherwise, print it (gets char from AL)
	jmp .repeat

.done:
	call exit

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

print_name:
	mv ah, 0Eh

.repeat:
	lodsb
	cmp al,0
	je .done
	int 10h
	jmp .repeat

.done
	call exit

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

	times 510-($-$$) db 0	; Pad remainder of boot sector with 0x
	dw 0xAA55		; The standard PC boot signature