Hi John -

This may be way outside the scope of what you have in mind, but I'd like to
see the ability to add a keypad for doing deposit, deposit next, examine,
that kind of thing.  Similar to what was once on the Intel MCS 85 SDK and
similar systems.

http://oldcomputers.net/intel-mcs-85.html

This would truly replace all the functionality of a front panel, and then
some.

- Eric

-----Original Message-----
From: [email protected] [mailto:[email protected]]On
Behalf Of monahanz
Sent: Thursday, February 19, 2015 11:28 AM
To: [email protected]
Subject: [N8VEM-S100:6355] A V3 version of our S100 bus System Monitor Board


The V1 and V2 versions of our tried and true System Monitor Board have stood
the test of time.  It's described here:-

http://s100computers.com/My%20System%20Pages/SMB%20Board/S100%20Bus%20SMB.ht
m



and while it’s only a year ago since we did a V2 version, I’m toying around
with doing a V3 version.



As an aside my current aim is to have a core S100 computer system of 4 solid
boards:-

A V3 SMB

A 16MB Static RAM board

http://s100computers.com/My%20System%20Pages/16M%20RAM%20Board/16MG%20RAM%20
Board



A V3 IDE/CF Card board

http://s100computers.com/My%20System%20Pages/IDE%20Board/My%20IDE%20Card.htm



and a 80486 Master/Slave board

http://s100computers.com/My%20System%20Pages/80486%20Board/80486%20CPU%20Boa
rd.htm



(Of course there are and will be other S100 boards in the future -- I
working on a Raspberry Pi S100 board),



Anyway I want to get the above core board’s rock solid -- ideally to run
reliably at 9-10MHz.  I think our Z80 and Propeller/Console IO boards are up
to it and the VGA board “should” be OK with the 80486.



Last week we went through the exercise of tweaking the V3 IDE board, thanks,
it’s gone for prototyping.



I would like to consider tweaking the V2 SMB, and I’m open to a wish list.

So far I have:-

Run wide power line traces, particularly to the HEX displays.

Label the silkscreen and jumpers better/extensively.

Redo the whole TMA 1-4 line switching circuit to be less sensitive to CPU
speeds (for Gary & co.)

Add a row of 0.1” jumpers near the top of the board so essential S100 bus
signals can be easily tapped into with the Saleae Logic or USBee logic
probes.

Use a few GAL’s to simplify the circuits and get more board space.



Suggestions please.

John


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