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=-0.8 required=5.0 tests=DKIM_INVALID,DKIM_SIGNED, MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 21187 invoked from network); 8 Apr 2021 08:16:56 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 8 Apr 2021 08:16:56 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id 2780C9C9B5; Thu, 8 Apr 2021 18:16:52 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 295199C723; Thu, 8 Apr 2021 18:16:32 +1000 (AEST) Authentication-Results: minnie.tuhs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=pobox.com header.i=@pobox.com header.b="Xc4hsO89"; dkim-atps=neutral Received: by minnie.tuhs.org (Postfix, from userid 112) id CC2179C723; Thu, 8 Apr 2021 18:16:30 +1000 (AEST) Received: from sasl.smtp.pobox.com (pb-sasl20.pobox.com [173.228.157.48]) by minnie.tuhs.org (Postfix) with ESMTPS id 05A089C722 for ; Thu, 8 Apr 2021 18:16:30 +1000 (AEST) Received: from sasl.smtp.pobox.com (unknown [127.0.0.1]) by pb-sasl20.pobox.com (Postfix) with ESMTP id 7E0BE92121; Thu, 8 Apr 2021 04:16:29 -0400 (EDT) (envelope-from davida@pobox.com) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=pobox.com; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; s=sasl; bh= ++kzwA8CoUewse30fN3psfsLxv0=; b=Xc4hsO89aHz1SJ+O7i+LfQf+12+DaJ/u 0jRYv4ThV05lIUrWbkbswOAal727wumoXYGsx0prLF08DeMs6DDTE0Qvh/PNx6KZ 5+WDGHKxzAPYlZVSHhy349pT7eDY9XYr6IoUgQQgVh0aoiT7s/fUkrntvztJaoUl mgd5GsNIo9Q= DomainKey-Signature: a=rsa-sha1; c=nofws; d=pobox.com; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; q=dns; s= sasl; b=DI/bRHRo2kCx2TQW6IC0qb7nk4rodukWX+A0ts7Gl0wQChybSIHcE+PY exNaBI6DnDdES2UHhwSuJkpDZdfEmF7xf4i1S9irQkjuYk7yes3kHOybg4HoQVBO ZW+syaPMf95Ke0tio4DL7Ga3BZ6wcu1Ai2F31UI/UzHwy2TnNKA= Received: from pb-sasl20.sea.icgroup.com (unknown [127.0.0.1]) by pb-sasl20.pobox.com (Postfix) with ESMTP id 6A7189211E; Thu, 8 Apr 2021 04:16:29 -0400 (EDT) (envelope-from davida@pobox.com) Received: from [192.168.86.129] (unknown [203.132.93.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by pb-sasl20.pobox.com (Postfix) with ESMTPSA id 56E939211A; Thu, 8 Apr 2021 04:16:26 -0400 (EDT) (envelope-from davida@pobox.com) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.15\)) From: David Arnold In-Reply-To: Date: Thu, 8 Apr 2021 18:16:21 +1000 Content-Transfer-Encoding: quoted-printable Message-Id: <26189F3F-CDCD-46C3-A6D3-B92883A9FDD0@pobox.com> References: To: Steve Nickolas X-Mailer: Apple Mail (2.3445.104.15) X-Pobox-Relay-ID: B6ECDF50-9842-11EB-83AF-A70464143EE4-29049682!pb-sasl20.pobox.com Subject: Re: [TUHS] Story about Microsoft and *ix 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: TUHS main list Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" > On 8 Apr 2021, at 16:02, Steve Nickolas wrote: >=20 > On Thu, 8 Apr 2021, Ed Bradford wrote: >=20 >> Does anyone recall how much RAM memory could be put on the first IBM = PC's? That was probably a major problem. >=20 > As I recall the earliest models supported 16-64K onboard, with later = models supporting 64-256K. The 1981 firmware was, IIRC, limited to 544K = (changed to 640K in 1982). Wikipedia agrees. $1565 minimum configuration had 16KB RAM, CGA = graphics, and single 5.25=E2=80=9D floppy drive (that is, no hard = drive). DOS 2.0, 2 years later, shipped with the XT which had 128KB RAM and a = 10MB hard drive. That might have been more practical. d