with open('parrot.data', 'rb') as f:
    buf = f.read()

assert len(buf) == 320 * 240 * 3, len(buf)

with open('vga_ram.hex', 'w') as f:
    for i in range(320 * 240):
        r = buf[i * 3 + 0]
        g = buf[i * 3 + 1]
        b = buf[i * 3 + 2]

        r4 = r >> 4
        g4 = g >> 4
        b4 = b >> 4

        f.write(f'{r4:x}{g4:x}{b4:x}')
        f.write('\n')