From mboxrd@z Thu Jan  1 00:00:00 1970
MIME-Version: 1.0
In-Reply-To: <CAK_6Rwdv9J4s=U0nX0GhxOxB9vT=AThJv-_fTuYeG=uOoJ+91Q@mail.gmail.com>
References: <CAK_6Rwdv9J4s=U0nX0GhxOxB9vT=AThJv-_fTuYeG=uOoJ+91Q@mail.gmail.com>
Date: Mon,  3 Nov 2014 15:18:39 -0800
Message-ID: <CACV-OriX1m-T=TcAn-Hy4GCtrocL--M75g2ye=feoz2ZKuM36w@mail.gmail.com>
From: David Hoskin <root@davidrhoskin.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
Subject: Re: [9fans] [OFF-TOPIC] It is true that is impossible write in
 binary code,
 the lowest level of programming that you can write is in hexadecimal code?
Topicbox-Message-UUID: 22ee1692-ead9-11e9-9d60-3106f5b1d025

It's certainly possible!

If your machine doesn't have those cool front panel toggle switches,
just use this simple compiler:

#include <u.h>
#include <libc.h>

void
main(void)
{
	char buf[8];
	int i;
	char c;

	while(read(0, buf, 8) =3D=3D 8){
		c =3D 0;
		for(i =3D 0; i < 8; ++i){
			switch(buf[i]){
			case '0':
				break;
			case '1':
				c |=3D 1 << (7 - i);
				break;
			default:
				exits("two");
			}
		}
		write(1, &c, 1);
	}

	exits("");
}

> Is another machine code?

Octal is popular for these things.

-- David


On 11/3/14, fran=C3=A7ai s <romapera15@gmail.com> wrote:
> I intend to write in lowest level of computer programming as a hobby.
>
> It is true that is impossible write in binary code, the lowest level of
> programming that you can write is in hexadecimal code?
>
> What is the lowest level of programming computers that you can write ?
>
> Is binary code?
>
> Is hex code?
>
> Is another machine code? Honestly do not know if it is true that there is
> another machine code beyond the binary and hex code.
>
> Is Assembly?
>