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=-0.3 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FROM,FROM_FMBLA_NEWDOM28,HTML_MESSAGE, MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 23138 invoked from network); 9 Apr 2021 17:31:47 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 9 Apr 2021 17:31:47 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id 692AA93DCF; Sat, 10 Apr 2021 03:31:45 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id A50C093D6B; Sat, 10 Apr 2021 03:31:22 +1000 (AEST) Authentication-Results: minnie.tuhs.org; dkim=pass (2048-bit key; unprotected) header.d=fastmail.com header.i=@fastmail.com header.b="Splhx1MB"; dkim=pass (2048-bit key; unprotected) header.d=messagingengine.com header.i=@messagingengine.com header.b="LrF+nea6"; dkim-atps=neutral Received: by minnie.tuhs.org (Postfix, from userid 112) id 2944693D6B; Sat, 10 Apr 2021 03:31:21 +1000 (AEST) X-Greylist: delayed 536 seconds by postgrey-1.36 at minnie.tuhs.org; Sat, 10 Apr 2021 03:31:20 AEST Received: from wout1-smtp.messagingengine.com (wout1-smtp.messagingengine.com [64.147.123.24]) by minnie.tuhs.org (Postfix) with ESMTPS id 9D1E393D69 for ; Sat, 10 Apr 2021 03:31:20 +1000 (AEST) Received: from compute3.internal (compute3.nyi.internal [10.202.2.43]) by mailout.west.internal (Postfix) with ESMTP id 599E8132E for ; Fri, 9 Apr 2021 13:22:23 -0400 (EDT) Received: from imap21 ([10.202.2.71]) by compute3.internal (MEProxy); Fri, 09 Apr 2021 13:22:23 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fastmail.com; h= mime-version:message-id:in-reply-to:references:date:from:to :subject:content-type; s=fm2; bh=6NBgafu/fjsJxKRKxEOAK254OL9K72N 0bhmn48q24No=; b=Splhx1MBeKwV2w93uGFf44JKikYxxhzEf9vcVW8+olj+Mkb q3yK99kiHBfc9nZcINJNSbLSBu29jdvrtJPUXJ00wz6SkgjnO2lAtQJAxMSBImXI 38QBJLZ6OkhkCetVrMVXug6HsOl5aOkVRGeFDFtuGiUrzR4rTt/6vYd9Z1EbfIQB Hv9NBeXXQWE6QxnP/U3SCo0v4jo+U7ufuly9VqZxaCo9r4DmNmOGteBhbdKEPTDe 55o501KEDxieBmB/ZTSnV1dSi1n8vNT7ExZcbePMdCK2PIkiusL39kV6iT61Ysmn zAq7Qb9pThIIfSHy4N6cedyDT6s+aQOky5QIaJw== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to:x-me-proxy :x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm2; bh=6NBgaf u/fjsJxKRKxEOAK254OL9K72N0bhmn48q24No=; b=LrF+nea6qu6CZE3UhxVqi6 Ae8gLzXCMKDtv7Z6DqCiqZIQRQ0R1y+4bNvIo1z2+CtWR7+4N7inTVHGKg19PXcX 9Lu6atgZsFqIJciHXP5ts0NcOKrDB8gaqoeohSl5wWPi0x+/2Ga/pCT7Fnwe2g6A CL6EtCGG9gSCpuR5s2XXuGX+DeS0USaiYsk0vhZF2qkyhobM9Bn+VqwOSNA/8rj2 njbP2ap2OLKDqCU1C9ToieqXiHsyUbrY+PktiorgUCi8zY4nptIUbLmjEDsC2nm/ 1HKT/hWDAKd1oLUqKQGaF+SlwWKgM728JsxjNS6OUiouWQZH5tPR62T/Jc4iJrBQ == X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduledrudekuddgudduhecutefuodetggdotefrod ftvfcurfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfgh necuuegrihhlohhuthemuceftddtnecuogfuuhhsphgvtghtffhomhgrihhnucdlgeelmd enucfjughrpefofgggkfgjfhffhffvufgtsegrtderreerredtnecuhfhrohhmpedftfho sgcuifhofihinhdfuceorhhosghgsehfrghsthhmrghilhdrtghomheqnecuggftrfgrth htvghrnhepuefhgedvjeevteffveeuudehleejiefgfeevtdegffefudekhfevgfdtvefg udetnecuffhomhgrihhnpehgohhoghhlvgdrtghomhdprhgvthhrohgsrhgvfigtohhmph huthgvrhhsrdhorhhgpdhrohhstghoqdhmieekkhdrtghomhdpsghlohhgshhpohhtrdgt ohhmpdhishhtqdhstghhlhgruhdruggvnecuvehluhhsthgvrhfuihiivgeptdenucfrrg hrrghmpehmrghilhhfrhhomheprhhosghgsehfrghsthhmrghilhdrtghomh X-ME-Proxy: Received: by mailuser.nyi.internal (Postfix, from userid 501) id D279A51C005F; Fri, 9 Apr 2021 13:22:22 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface User-Agent: Cyrus-JMAP/3.5.0-alpha0-273-g8500d2492d-fm-20210323.002-g8500d249 Mime-Version: 1.0 Message-Id: In-Reply-To: References: <0F0B9BFC06289346B88512B91E55670D3012@EXCHANGE> <0f581f48-6f1e-0f7e-45e7-38469f4e4012@e-bbes.com> Date: Fri, 09 Apr 2021 12:22:02 -0500 From: "Rob Gowin" To: tuhs@minnie.tuhs.org Content-Type: multipart/alternative; boundary=329c7a91c9c64ed58ab6f32ad78340b0 Subject: Re: [TUHS] SUN (Stanford University Network) was PC Unix 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" --329c7a91c9c64ed58ab6f32ad78340b0 Content-Type: text/plain [I see that Dan C. has already covered some of this.] On Fri, Apr 9, 2021, at 6:13 AM, U'll Be King of the Stars wrote: > I've never seen a 68k SBC. Have I missed out something along the way? > Is there a community for 68k SBC's? There is a community of folks making 'retro-brew' computers, which are new home-brew board designs based around older CPUs. While Z80/Z180 based designs are the most popular, there are a smattering of 68K retro-brews. The main places for discussions are https://groups.google.com/g/retro-comp and https://www.retrobrewcomputers.org/forum/index.php. The availability of very cheap PCBs from China (2 layers, 10cm x 10cm, $3 per board shipped, shipped in a week) and open source PCB design software like KiCad seems to have increase the amount of this kind of activity over the past few years. Hardware-wise, most of these are 68000's with some ROM (around 512K is typical), some SRAM (512K to 1 MB), a UART of some kind, and perhaps some storage either SDCard via SPI or CompactFlash via an IDE port. I think only the Kiwi68K supports any type of video, using a vintage TI video chip. Here are a few links to 68K designs: ECB Mini-68K CPU Card (68008 based and not a single board) - https://www.retrobrewcomputers.org/doku.php?id=boards:ecb:mini-68k:start ECB KISS-68030: (68030 based and not a single board) - https://www.retrobrewcomputers.org/doku.php?id=boards:ecb:kiss-68030:start The Rosco M68K: https://rosco-m68k.com The Tobster 030 - https://www.retrobrewcomputers.org/doku.php?id=builderpages:tobster:t030 Jeff Tranter's 68000 - http://jefftranter.blogspot.com/2017/01/building-68000-single-board-computer_14.html Plasmo's Tiny68K - https://www.retrobrewcomputers.org/doku.php?id=boards:sbc:tiny68k:tiny68k_rev2 Plasmo's CB030 - https://www.retrobrewcomputers.org/doku.php?id=builderpages:plasmo:cb030 Kiwi68K - https://www.ist-schlau.de All these designs are open source. The Rosco one is available as a kit on Tindie.com. (I have no affiliation.) I've got my own 68008 based board that I'm working on, but haven't published anything about it. -- I think the main reason the 68K is not more popular in the retro-brew/DIY community is lack of software. On the Z80 side, once you've built a board there is a ton of CP/M-80 software available to run. For 68K boards, the usual software progression is a ROM monitor, then maybe porting of Lee Davison's EhBASIC, then CP/M-68K. CP/M-68K has very little software available, and what is available are microEmacs and a few compilers (K&R C, BASIC and Pascal). That's about it for 68Ks without an MMU. A couple of the boards above that have 68030 do have Linux running on them. There's also the perception that Z80s have an easier hardware interface, but I'm not convinced that's true. -- Rob ECB Mini-68k CPU Card I should disclaim that some of the things I'm about to link to are kits sold on Tindie.com. I have no affiliation with the creators, other than being a fan of their work. --329c7a91c9c64ed58ab6f32ad78340b0 Content-Type: text/html Content-Transfer-Encoding: quoted-printable
[I see tha= t Dan C. has already covered some of this.]

On Fri, Apr 9, 2021, at 6:13 AM, U'll Be King of the Stars wrote:
I've never seen = a 68k SBC.  Have I missed out something along the way? 
Is there a community for 68k SBC's?
<= br>
There is a community of folks making 'retro-brew' computer= s, which are new home-brew board designs based around older CPUs. While = Z80/Z180 based designs are the most popular, there are a smattering of 6= 8K retro-brews. The main places for discussions are https://groups.google.com/g/retro-co= mp and https://www.retrobrewcomputers.org/forum/index.php. The = availability of very cheap PCBs from China (2 layers, 10cm x 10cm, $3 pe= r board shipped, shipped in a week) and open source PCB design software = like KiCad seems to have increase the amount of this kind of activity ov= er the past few years. 

Hardware-wise,= most of these are 68000's with some ROM (around 512K is typical), some = SRAM (512K to 1 MB), a UART of some kind, and perhaps some storage eithe= r SDCard via SPI or CompactFlash via an IDE port. I think only the Kiwi6= 8K supports any type of video, using a vintage TI video chip.
<= div>
Here are a few links to 68K designs:
ECB Mini-68K CPU Card (68008 based and not a single board) = - https://www.retrobrewcomputers.org/doku.php?id=3Db= oards:ecb:mini-68k:start
ECB KISS-68030: (68030 based = and not a single board) - https://www.retrobrewcom= puters.org/doku.php?id=3Dboards:ecb:kiss-68030:start
T= he Rosco M68K: https://rosco-m68k.com=

All these designs are open s= ource. The Rosco one is available as a kit on Tindie.com. (I have no aff= iliation.) I've got my own 68008 based board that I'm working on, but ha= ven't published anything about it.

--

I think the main reason the 68K is not more popu= lar in the retro-brew/DIY community is lack of software. On the Z80 side= , once you've built a board there is a ton of CP/M-80 software available= to run. For 68K boards, the usual software progression is a ROM monitor= , then maybe porting of Lee Davison's EhBASIC, then CP/M-68K. CP/M-68K h= as very little software available, and what is available are microEmacs = and a few compilers (K&R C, BASIC and Pascal). That's about it for 6= 8Ks without an MMU. A couple of the boards above that have 68030 do have= Linux running on them. There's also the perception that Z80s have an ea= sier hardware interface, but I'm not convinced that's true. 

-- Rob 




ECB Mini-68k CPU Card
<= /h1>
I should disclaim that some of the things I'm about to link to = are kits sold on Tindie.com. I have no affiliation with the creators, ot= her than being a fan of their work. 
--329c7a91c9c64ed58ab6f32ad78340b0--