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[23.128.96.18]) by mx.google.com with ESMTP id h24si5625285ejt.89.2021.02.05.01.21.31; Fri, 05 Feb 2021 01:21:56 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=aculab.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230051AbhBEJRw convert rfc822-to-8bit (ORCPT + 99 others); Fri, 5 Feb 2021 04:17:52 -0500 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.85.151]:56213 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229721AbhBEJOu (ORCPT ); Fri, 5 Feb 2021 04:14:50 -0500 Received: from AcuMS.aculab.com (156.67.243.126 [156.67.243.126]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-18-_nbLTyr_NWyG3CFTV9PN3g-1; Fri, 05 Feb 2021 09:13:04 +0000 X-MC-Unique: _nbLTyr_NWyG3CFTV9PN3g-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) by AcuMS.aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Fri, 5 Feb 2021 09:13:03 +0000 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Fri, 5 Feb 2021 09:13:03 +0000 From: David Laight To: 'Pavel Machek' , Andy Shevchenko CC: Arnd Bergmann , Willy Tarreau , Linux ARM , Linux Kernel Mailing List , Krzysztof Adamski , Oleksij Rempel , Baruch Siach , Russell King - ARM Linux , Daniel Tang , =?iso-8859-1?Q?Uwe_Kleine-K=F6nig?= , "Jamie Iles" , Barry Song , "Viresh Kumar" , Linus Walleij , Jonas Jensen , Marc Gonzalez , Hartley Sweeten , Lubomir Rintel , Neil Armstrong , Shawn Guo , Alex Elder , "Alexander Shiyan" , Koen Vandeputte , Hans Ulli Kroll , Vladimir Zapolskiy , Wei Xu , Steven Rostedt , Yoshinori Sato , Mark Salter , Michael Ellerman , "Geert Uytterhoeven" , Thomas Bogendoerfer Subject: RE: Old platforms: bring out your dead Thread-Topic: Old platforms: bring out your dead Thread-Index: AQHW5tIZDj0fPDkXL0CUBZoouVVmHKoiLtzAgCZ1ZXKAAMpxkA== Date: Fri, 5 Feb 2021 09:13:03 +0000 Message-ID: <4f53ce214f2c498fa47794327a8f35fc@AcuMS.aculab.com> References: <20210109055645.GA2009@1wt.eu> <6fb7e3f5035d44fab9801001f1811b59@AcuMS.aculab.com> <20210204210140.GB7529@amd> In-Reply-To: <20210204210140.GB7529@amd> Accept-Language: en-GB, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > We have open-hardware implementation for 486, AFAICT, thanks to MISTer > project. I'm not aware of open 586 core. > > Being able to run recent Linux on open hardware sounds fun. Putting a 486 on an fpga might be 'interesting'. But it has a lot of 'cruft' (like 286 protected mode) that you really don't need. I'd bet RISCV comes out smaller. Most x86 ports are actually IBM-PC ports - so you'd also have to sort out all the peripherals. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)