# first we define our machine code sequence
machine_code = (
    b"\xB4\x09" # mov ah, 9
    b"\xBA\x10\x01" # mov dx, [message offset]
    b"\xCD\x21" # int 21h
    b"\xB4\x4C" # mov ah, 4Ch
    b"\x30\xC0" # xor al, al
    b"\xCD\x21" # int 21h
    b"\x00\x00\x00" # padding, aligning the message bytes
    # Message with DOS string terminator ($)
    b"\x48\x65\x6C\x6C\x6F\x2C\x20\x57\x6F\x72\x6C\x64\x21\x24\x00"
)

fn = "hello-manual.com"

# now we write that sequence of bytes into a binary file: "wb"
with open(fn, "wb") as f:
    f.write(machine_code)

print(f"DOS .com file '{fn}' created successfully.")