Now that the S100 bus XVGA video board (
http://s100computers.com/My%20System%20Pages/VGA%20Board/VGA%20Board.htm)
has gone out to everybody, I would like to announce our next board…
It’s a V3 version of our tried and true SMB (System monitor Board). The
original board is described here:-
http://s100computers.com/My%20System%20Pages/SMB%20Board/S100%20Bus%20SMB.htm
The following changes/updates have been made to the board:-
-
The was a minor error on the above V2 board (pin 5 of U32), this is now
corrected.
-
There was a report of the TMA 0-3 switch circuit was not working
reliably with the 80386 board at high speed, this circuit has now been
completely replaced/simplified with a single GAL.
-
An Intersil ICM7216D chip has been added along with 3 new Digital
displays to continuously display the frequency of the bus master clock
speed (PHI) in MHz.
-
A circuit and LED bar was added to continuously display the bit pattern
of a user defined output port. (default, LED Diagnostic Port 05H).
-
A circuit was added to trigger an interrupt if the S100 bus ERROR*
signal (pin 98) is activated.
-
A series of jumpers was added to easily attach a logic probe cable (such
as a USBee or Saleae unit) for hardware debugging.
-
The LM323K 5Volt, 3Amp regulator can be replaced (in the same
footprint/space) with a Pololu 5 Volt , 2.5 Amp D24V25 Switching regulator.
-
Almost all chips from the V2 board can be re-used on the V3 board. Only
the ICM7216D, 3 Digital displays and GAL 22V10 are new.
Please see the bottom of the above page for more information.
I will be sending off an order for final bare boards in the next few days. If
you would like one or more boards please let me know (preferably by e-mail).
The usual arrangements ~$15/board + postage WHEN you get the board via
PayPal.
John
--
You received this message because you are subscribed to the Google Groups
"N8VEM-S100" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/d/optout.
