From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-0.6 required=5.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.2 Received: from minnie.tuhs.org (minnie.tuhs.org [45.79.103.53]) by inbox.vuxu.org (OpenSMTPD) with ESMTP id 62464a02 for ; Tue, 17 Dec 2019 06:53:55 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id 6298E9BBFF; Tue, 17 Dec 2019 16:53:53 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 8872893D5F; Tue, 17 Dec 2019 16:53:19 +1000 (AEST) Authentication-Results: minnie.tuhs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=e-bbes.com header.i=@e-bbes.com header.b="hSZ8UYlw"; dkim-atps=neutral Received: by minnie.tuhs.org (Postfix, from userid 112) id 6DE5893D5F; Tue, 17 Dec 2019 16:53:16 +1000 (AEST) X-Greylist: delayed 1498 seconds by postgrey-1.36 at minnie.tuhs.org; Tue, 17 Dec 2019 16:53:15 AEST Received: from gateway12.unifiedlayer.com (gateway12.unifiedlayer.com [74.220.216.122]) by minnie.tuhs.org (Postfix) with ESMTPS id CCF0793D39 for ; Tue, 17 Dec 2019 16:53:15 +1000 (AEST) Received: from cm3.websitewelcome.com (unknown [108.167.139.23]) by gateway12.unifiedlayer.com (Postfix) with ESMTP id 2A0C42009F328 for ; Tue, 17 Dec 2019 00:04:46 -0600 (CST) Received: from shared83.accountservergroup.com ([162.215.248.81]) by cmsmtp with ESMTP id h5yPiMAqJzc5jh5yPium21; Tue, 17 Dec 2019 00:04:46 -0600 X-Authority-Reason: nr=8 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=e-bbes.com; s=default; h=Content-Transfer-Encoding:Content-Type:In-Reply-To:MIME-Version :Date:Message-ID:From:References:To:Subject:Sender:Reply-To:Cc:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=IqU8Wb7SMiHsVkcuZloASTg2tjh4SNLG/WItsQdbyM4=; b=hSZ8UYlwLtNvnNlecJzI9T0vLh tS7ldEpZvnVb4vKsHxkhLSt/A1X99q3hgEXmXqCuNoxLISgjRIR5lV+FH8v6GboRxx11Yuv8Ex3JO iHoo3O0A5ogl5uveRnWsoV8eOLciXHba2TRB8DsSRdBsI2tCllPPXJK4Wqut1VO0x0IZWrVPS/hGr /DcdXM8OagkJpQ54vAjCOiBwoTNNPopF3eb6ad3qhEgAokYuZN1IMqK92r1zUs7OBEXBauRYqjKOm judaIyY4G/9sEkM6or1Pqwzoc/Z5PrVUnqAXJ+oHm8eQuPEhHEc8iSlAa1I31enZQaOgYypa+1iXb 8XeILBkQ==; Received: from pool-213.162.154.239.dynamic.wobline-ip.de ([213.162.154.239]:52913 helo=[172.16.120.247]) by shared83.accountservergroup.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.91) (envelope-from ) id 1ih5yP-001DzP-Bt; Tue, 17 Dec 2019 00:04:45 -0600 To: Paul Ruizendaal , TUHS main list References: <6be1d013-2323-9850-03fd-c4014c4a69e7@e-bbes.com> From: emanuel stiebler Openpgp: preference=signencrypt Message-ID: Date: Tue, 17 Dec 2019 07:04:42 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - shared83.accountservergroup.com X-AntiAbuse: Original Domain - minnie.tuhs.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - e-bbes.com X-BWhitelist: no X-Source-IP: 213.162.154.239 X-Source-L: No X-Exim-ID: 1ih5yP-001DzP-Bt X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: pool-213.162.154.239.dynamic.wobline-ip.de ([172.16.120.247]) [213.162.154.239]:52913 X-Source-Auth: emu@e-bbes.com X-Email-Count: 2 X-Source-Cap: ZW11YmVzO2VtdWJlcztzaGFyZWQ4My5hY2NvdW50c2VydmVyZ3JvdXAuY29t X-Local-Domain: yes Subject: Re: [TUHS] Blit source 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: , Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" On 2019-12-16 12:06, Paul Ruizendaal wrote: > It would seem that the circuit was intentionally simple and straightforward: a M68K cpu, ram, rom, two 6850 UARTS and the circuit to drive the display. The key aspects of the video circuitry (and mouse circuitry) are discussed in this paper: > https://9p.io/cm/cs/doc/87/archtr.ps.gz ("Hardware/Software Tradeoffs for Bitmap Graphics on the Blit”). Thanks! > It would seem to me that doing a version of the Blit that runs on a FPGA board and generates 720p HDMI output would not be impossible to do, It actually pretty simple, all this stuff is avalable on AMIGA emulators for FPGAs ... > if the software can be configured to deal with a different geometry (e.g. 1024x720 instead of 800x1024). Whether that would be much different from running the emulator on a PC remains unclear, of course. It is on my list of things to do, but not on the first page ;-) Still waiting, that schematics & sources show up ...