DivinityArcane

_hex = {'0':0, '1':1, '2':2, '3':3, '4':4, '5':5,
        '6':6, '7':7, '8':8, '9':9, 'A':10, 'B':11,
        'C':12, 'D':13, 'E':14, 'F':15}

def bit(n1, n2):    
    if str(n1).upper() not in _hex:
        raise ValueError('Invalid n1')
    elif str(n2).upper() not in _hex:
        raise ValueError('Invalid n2')

DivinityArcane

; Simple NASM bootloader, or OS, if you please.
; Boots up and displays a black screen, and prints a message.

[ORG 0x7C00]        ; Specify where to load the code.

msg: db  'Hello!'   ; Define the msg.
len: equ $-msg      ; Define the msg length.

; Create our "PRINT" function, which takes two arguments:
;  1: The message