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 [ 7 posts ] 
 RetroBrew - another place for homebrew computers 
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Joined: Wed Jan 09, 2013 6:54 pm
Posts: 1799
Image

RetroBrew Computers is a forum and wiki for people building their own machines: SBCs, Eurocard, S-100 or whatever. Ranging from 6502 and 6809 through Z80 and Z180 to 68000. And with RSS feeds too!
The Mini-M68K and KISS-68030 systems look pretty nice.

via a comment over on 6502.org

(RetroBrew seems to be a successor of the N8VEM discussion groups.)


Wed Apr 20, 2016 10:45 am

Joined: Tue Dec 11, 2012 8:03 am
Posts: 285
Location: California
Thanks. That forum looks rather new. The board in your picture is rather nicely laid out, too.

_________________
http://WilsonMinesCo.com/ lots of 6502 resources


Wed Apr 20, 2016 8:00 pm WWW

Joined: Wed Jan 09, 2013 6:54 pm
Posts: 1799
I see the wiki has an index of quite a number of boards in progress, many for sale at reasonable cost:
https://retrobrewcomputers.org/doku.php ... dinventory

It also has a space for individuals to post about their builds:
https://retrobrewcomputers.org/doku.php ... ages:start


Sat Oct 01, 2016 7:49 pm

Joined: Wed Jan 09, 2013 6:54 pm
Posts: 1799
Another project just reached an interesting level of maturity over at RetroBrew:

Tiny68K, 68000 SBC with 16 Meg memory for CP/M-68K

Image


Wed Nov 08, 2017 1:21 pm

Joined: Sat Dec 23, 2017 2:01 am
Posts: 6
BigEd wrote:
Another project just reached an interesting level of maturity over at RetroBrew:

Tiny68K, 68000 SBC with 16 Meg memory for CP/M-68K

Image


Just browsing the old posts and find my Tiny68K design being mentioned, cool!
The wiki page for Tiny68K is here:
https://www.retrobrewcomputers.org/doku ... bc:tiny68k

The bus-connected compactflash IDE interface is not reliable for some brands of CF, so I redesigned it and added isolation resistors for the 16-bit data lines. It is working fine now. I also added a non-maskable interrupt button and a real-time clock. The 2nd board revision is here:
https://www.retrobrewcomputers.org/doku ... ny68k_rev2

The main motivation for yet another 68000 homebrew was cost reduction. I have thought it was possible to build a $10 68000 SBC using 10cm*10cm pc board, obsolete parts (old CPLD, 16meg SIMM, and NMOS 68000), and cheap serial flash, but the resulting board was too spartan and it was still more than $10. I compromised and added a CF-IDE, socketed the major components, add a 7-seg display and end up with a $20 SBC that's CP/M-68K capable. Looking back, I'm happy with the compromise.


Sat Dec 23, 2017 2:38 am

Joined: Wed Jan 09, 2013 6:54 pm
Posts: 1799
Welcome - $20 is very good indeed.

(Edit: fixed up the photo link too.)


Sat Dec 23, 2017 8:03 am

Joined: Sat Dec 23, 2017 2:01 am
Posts: 6
BigEd wrote:
Welcome - $20 is very good indeed.

(Edit: fixed up the photo link too.)


A clarification regarding the price of Tiny68K: On the retrobrew board inventory page I listed it for $20 as kit where SMT components are assembled already but the thru-hole components still need to be soldered. It is $27 fully assembled & tested including a compact flash drive.
https://www.retrobrewcomputers.org/doku ... dinventory


Sat Dec 23, 2017 2:07 pm
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