From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 11132 invoked from network); 24 Sep 2020 01:28:41 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 24 Sep 2020 01:28:41 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id 47B229CEA7; Thu, 24 Sep 2020 11:28:40 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id EAA9B9CC8C; Thu, 24 Sep 2020 11:28:19 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id B5C4E9CC8C; Thu, 24 Sep 2020 11:28:16 +1000 (AEST) Received: from mercury.lcs.mit.edu (mercury.lcs.mit.edu [18.26.0.122]) by minnie.tuhs.org (Postfix) with ESMTPS id 316EC9CBCA for ; Thu, 24 Sep 2020 11:28:16 +1000 (AEST) Received: by mercury.lcs.mit.edu (Postfix, from userid 11178) id 1FC1E18C099; Wed, 23 Sep 2020 21:28:15 -0400 (EDT) To: tuhs@minnie.tuhs.org Message-Id: <20200924012815.1FC1E18C099@mercury.lcs.mit.edu> Date: Wed, 23 Sep 2020 21:28:15 -0400 (EDT) From: jnc@mercury.lcs.mit.edu (Noel Chiappa) Subject: Re: [TUHS] Fwd: Choice of Unix for 11/03 and 11/23+ Systems X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jnc@mercury.lcs.mit.edu Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" > Would also be great if supported RL02 drives. ;) _Support_ for RL02's will not be a problem (but there are probably some issues - see below). I have an RL11 driver for V6, which will be easy to include in a system build. There is also a RL V6 boostrap (which lives in block 0 - it loads the OS from a V6 filesystem); how to load it off the RL pack on actual hardware, I'm not sure; do you have some PROM device that has an RL bootstrap in it? Or do you have some other drive which is going to be your boot device? If not, how are you going to get the bits onto an RL pack? This was a bit of an issue for Fritz Muelller with his -11/45 (with an RK05 drive); he finally wound up having to load it over a serial line, which took several hours. He used something called PDP11GUI, and you're in luck, that does support RL02's. Also, I'm not sure if you've had any experience with an old removable-pack drive. If not, you have to be very careful with them; if you have a head crash, the heads are now unobtainium, so a head crash will turn the drive into junk. (Which is a big part of why Dave Bridgham and I are doing to QSIC RK11 emulator...) The packs need to be absolutely clean; a number of people have experience with them, you should probably qget some lessons from them before trying to use it. > I'd imagine the V6 TTY driver would support boards with multiple serial > ports. Guess that's what's needed for multi user access. The TTY code in V6 consists of two levels of driver. The bottom layer is a driver which is specific to the particular type of card one's using; DL-11, DZ-11, etc. If the card supports multiple lines, that driver will too. Then there's a layer above that, tty.c, which the low-level driver uses to interace to the OS; the user talks to that. That layer is multi-line. Noel