How about like the Heathkit PAM or 11/34a ODT. Not sure if the PAM used another CPU. The 11/34 used a 4004 but I'm sure there are other methods.
Sent from my iPhone > On Feb 19, 2015, at 7:40 PM, John Monahan <[email protected]> wrote: > > Eric, I Have been thinking of deposit, deposit next etc. but with dip > switches. Anybody seen a non CPU/simple hex keypad input circuit. I would > rather not make this board a computer within a computer. > John > > > From: [email protected] [mailto:[email protected]] On > Behalf Of Eric Osman > Sent: Thursday, February 19, 2015 4:32 PM > To: [email protected] > Subject: RE: [N8VEM-S100:6363] A V3 version of our S100 bus System Monitor > Board > > 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.htm > > 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%20Board > > 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%20Board.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 > -- > 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. > -- > 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.
