Guy's I sorry to say that I think I will have to do one more prototype of the 16MG S100 static RAM board. A was doing some things in 80386 protected mode and to my horror realized that RAM writes at one location was being duplicated at another location. For example filling RAM at 80000H also fills 280000H. Clearly address line(s) screw-up.
It turns out keeping track of these address lines is more complicated that you might think because I want to use the same mezzanine boards on this board as on the 32MG (and later) boards that utilize fast/pipeline 32 bit addressing (and a very different layout). Anyway seeing how many want the board I'm reluctant to chance a large order and have everybody disappointed. So please be patient I will try and move things as fast as possible. John From: [email protected] [mailto:[email protected]] On Behalf Of Fabio Battaglia Sent: Tuesday, March 18, 2014 4:53 AM To: [email protected] Subject: Re: [N8VEM-S100:2802] A new 16MB S100 Bus static RAM board Todd, I'd like to increase my order to 3x RAM boards + 2x mezzanine each (6 total) Thanks, Fabio On Feb 27, 2014 2:41 PM, "Todd Goodman" <[email protected]> wrote: I'm willing to coordinate a larger purchase and will take three of these boards myself. Todd * monahanz <[email protected]> [140226 20:03]: > > > Back over 2 years ago Andrew and I put together an S100 bus "4MB Static RAM > board" with IEE-696 8/16bit data carrying capacity. This board has proven > to be very popular and very reliable. Over 30 boards were already made and > distributed to users. However in our quest to install 16 and 32 bit CPU's > on the S100 bus, 4MG has started to look like a limitation. The S100 bus > is capable of addressing up to 16MG. For this 4 of the above boards would > be needed. > > Over the past few years the price and availability of high speed static > RAM's have changed dramatically. It is now feasible to place 16MB of > high speed IEE-696 8/16 bit RAM on a single board. A prototype of this > board is described here:- > > http://s100computers.com/My%20System%20Pages/16M%20RAM%20Board/16MG%20RAM%20 Board.htm > > It's unclear what the interest is in people obtaining a "commercial style" > bare board like this. I will definitely be getting 4 for myself. If you > absolutely need one sooner rather than later let Andrew know we can include > you in the early "first batch". Otherwise stay tuned for a later group > purchase by (hopefully) a group member that will organize a larger purchase > - at a lower price. If there is group member right now that could > coordinate a purchase all the better. > > -- > 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] <mailto:n8vem-s100%[email protected]> . > For more options, visit https://groups.google.com/groups/opt_out. -- 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] <mailto:n8vem-s100%[email protected]> . For more options, visit https://groups.google.com/groups/opt_out. -- 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.
