That was fast! John
From: [email protected] [mailto:[email protected]] On Behalf Of Ian McLaughlin Sent: Thursday, March 19, 2015 10:29 AM To: [email protected] Subject: Re: [N8VEM-S100:6578] A V3 version of the S100 Bus System Monitor Board. John, Please put me down for 1 board. Thanks! Ian On Mar 19, 2015, at 10:26 AM, monahanz <[email protected]> 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. --- Filter service subscribers can train this email as spam or not-spam here <http://my.email-as.net/spamham/cgi-bin/learn.pl?messageid=0C8A9724CE5D11E4A820247293ED0201> -- 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. -- 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.
