nand-table.py

# create a NAND lookup table

#!/usr/bin/python3
import sys

for i in xrange(256):
    if i % 16 == 0:
        sys.stdout.write("    .db ") 
    
    # PB1 input
    a = i & 2
    
    # PB2 input
    b = i & 4
    
    # calculate PB0 output: A NAND B
    q = not (a and b)
    
    # set all other bits to 1, for pullup
    q = q | 0xfe
    
    sys.stdout.write("0x" + format(int(q), '02x'))
    sys.stdout.flush()
    if i % 16 == 15:
        sys.stdout.write("\n")
    else:
        sys.stdout.write(", ")