Hi John, Please can you put me down for 1 x S100 System Monitor Board V3
many thanks David Fry On Thursday, March 19, 2015 at 5:26:07 PM UTC, monahanz wrote: > > > 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.
