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 29838 invoked from network); 20 Sep 2020 13:13:12 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 20 Sep 2020 13:13:12 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id 282D194565; Sun, 20 Sep 2020 23:13:08 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 80BAE93D58; Sun, 20 Sep 2020 23:12:33 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id 18AFE93D58; Sun, 20 Sep 2020 23:12:29 +1000 (AEST) Received: from mercury.lcs.mit.edu (mercury.lcs.mit.edu [18.26.0.122]) by minnie.tuhs.org (Postfix) with ESMTPS id D4AEC93D54 for ; Sun, 20 Sep 2020 23:12:27 +1000 (AEST) Received: by mercury.lcs.mit.edu (Postfix, from userid 11178) id C205118C0E2; Sun, 20 Sep 2020 09:12:26 -0400 (EDT) To: tuhs@minnie.tuhs.org Message-Id: <20200920131226.C205118C0E2@mercury.lcs.mit.edu> Date: Sun, 20 Sep 2020 09:12:26 -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" > Thanks so much for your reply. That's what we're here for... :-) > I have an 11/23+ does that make a difference? No. The KDF11-B of the 23+: http://gunkies.org/wiki/KDF11-B_CPU is the same CPU as all the other KDF11 CPUs; it just has a couple of extra peripherals on the board (2 asyn serial lines, and some PROMs, IIRC). > From the manual it seems to have an MMU Like all KDF11 CPUs, it has a socket for an MMU chip, but the chip may or may not be there (I don't know if it was standard on the 23+; and in any event, it may have been pulled - the CPU will work without it). The main CPU is a DIP carrier which holds two chips; the optional KTF11-A MMU has one (see the image, above); the optional KEF11-A FPU is also a carrier with two chips. (The KDF11-B can also hold the large 6-chip carrier of the optional KEF11-B CIS chip - a rara avid indeed, if you'relucky enough to have it.) If yours doesn't have the MMU chip, you're probably SOL; those are very rare. KEF11-A FPU chips are avilable on eBay for modest amounts. > I'm not sure if it's split I/D. None of the KDF11 CPUs support splite I/D. Noel