I'm glad to report that so far the hardware for the V1.1 version of the Z80 based SBC is holding up fine. The prototype came in a few days ago. Looks like no major hardware bugs. Currently I have to hammer out a decent monitor to allow downloads of Xmodem files from a PC over the USB port and get the IDE/CF card diagnostics working. I'm not sure I have the stomach to do a full CPM3 may settle for non-banked CPM3 or leave it to others. The good news is the lower 32K RAM bank switching is working fine. Please see here for more info:-
http://s100computers.com/My%20System%20Pages/SBC%20Z80%20Board/SBC%20Z80%20CPU%20Board.htm I am NOT at the point of taking bare board orders yet. Will announce when I have a decent monitor. Stay tunded! John On Wednesday, September 9, 2015 at 12:34:51 PM UTC-7, monahanz wrote: > Guys, I thinking of trying to solve the chicken/egg problem by doing a > single Z80 based S100 board that would contain 64K RAM, EEPROM, PS/2 > keyboard input as well as a host of indicator LED's and jumpers to > deactivate ROM/RAM keyboard etc. one at a time as other boards are added to > get new people started on the S100 bus. > > The only part I'm not sure of is what to do about console output/video. > Was thinking of using the basic Propeller Console IO circuit > > http://s100computers.com/My%20System%20Pages/Console%20IO%20Board/Console%20IO%20Board.htm > > > but this requires programming its two wire serial EEPROM with Parallaxes > software and USB adaptor/software. Do you think that is outside the range > capability of most > newcomers. Alternatively we could go with a straight serial output to some > dumb terminal IBM PC terminal emulator. Open also to other suggestions. > > 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.
