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RE: [N8VEM-S100:902] two new S-100 Boards

Hi Jack!  Thanks!  Yes, I am planning on releasing the S-100 68K CPU board this summer.  The PCB itself will likely never “finish” trace route optimization due to the inherent complexity of the circuitry.  Eventually the board will be just “good enough” and I will send it to manufacturing. 


I will keep the board in trace route optimization so it will continue to grind in the background and if any future tweaks to the board, I will roll in the improved trace routing at that time.  Otherwise we may have to wait forever for this board to complete.


Thanks and have a nice day!

Andrew Lynch


From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of John Monahan
Sent: Monday, July 09, 2012 6:57 PM
To: n8vem...@googlegroups.com
Subject: RE: [N8VEM-S100:902] two new S-100 Boards


We have done an S-100 bus master/slave 68K CPU board a while back Jack. It works fine. Andrew is optimizing the board traces right now for a final production board in a few weeks.  There has been quite a bit of interest in the board.  I have done about twenty S-100 boards to date, that one was the most fun/rewarding so far!  See here for details:-








From:  John Monahan Ph.D

e-mail: mon...@vitasoft.org

Text:    mon...@txt.att.net



From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of Jack Rubin
Sent: Monday, July 09, 2012 3:09 PM
To: n8vem...@googlegroups.com
Subject: Re: [N8VEM-S100:901] two new S-100 Boards


Any plans to develop a 68000 interface?


From: monahanz <mon...@vitasoft.org>
To: n8vem...@googlegroups.com
Sent: Mon, July 9, 2012 4:47:25 PM
Subject: [N8VEM-S100:901] two new S-100 Boards

For those interested in S-100 Bus systems and corresponding CPM software, Andrew Lynch & I (John Monahan) have just finished constructing a second prototype of an S-100 Bus video board capable of  SVAG video resolution.  For those interesting in a better S-100 video display you might want to take a look at this board. It is capable of displaying a very crisp 100 characters per line display.  It is based on the LAVA-10 video chip set. This is a Xilinx Spartan 3 FPGA module.  Please see here for more details:-


We have also completed a prototype 80286 S-100 master/slave S-100 CPU board.  In my system this runs with a clock speed of 12MHz.  It is the next stepping stone from our earlier 8088 and 8086 CPU boards. It works with the 20 or so other S-100 boards we have done and allows one to boot CPM86 or MSDOS (V4.1) with our IDE and ZFDC controller boards.  Please see here for more details:-

We are now about to have made “production boards” for both these boards. Note, these are bare boards and will be ~$20/board.  These boards are only for hobbyists and though some help can be provided on forums you need to have a working knowledge of these systems to get them to work.