Paul you are now down for 2
From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of Paul Birkel
Sent: Friday, March 20, 2015 8:41 AM
Subject: Re: [N8VEM-S100:6607] Re: A V3 version of the S100 Bus System Monitor Board.
Skipped me John, alas. Message 3:04 AM; request for two ... please?
On Fri, Mar 20, 2015 at 11:35 AM, monahanz <mon...@vitasoft.org> wrote:
On Thursday, March 19, 2015 at 10:26:07 AM UTC-7, monahanz wrote:
OK here is the list I will work from:-
Ian McLaughlin 1
Fabio Battaglia 3
Tom Lafleur 1
Brian Marstella 1
David Fry 1
Matthew Turner 3
Leon Byles 1
J. Alexander Jacocks 1
Jedi Master 2
Eric Osman 1
Don Caprio 1
John Monahan 4
I will order 30 boards today from PCBCart (China). Typically takes 4 weeks. All the usual suspects here, so I think I have everybody's address. Stay tuned.
BTW the V3 IDE board had to go back for another prototype run, there was a weird timing issue with the GAL's and the 8255 Rd/Wr. Went back too TTL's with latched 74LS373's. Also stay tuned.
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:-
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.
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 n8vem-s100+...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.