Re: [N8VEM-S100:7532] A new Z80 based SBC to get beginners started on the S100 bus

I agree that this sounds really cool. I'm also in the "yes, please, serial port" camp. I haven't seen a VT100 built from ATMega's, but I recently built this VT100 that's based on a PIC32: http://geoffg.net/terminal.html - it turned out great. Serial in + PS/2 keyboard, VGA and composite video out, all driven from the PIC32's internal D/A. Only a few bucks in parts (most of the $ in the connectors).

dylan

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On Wednesday, September 9, 2015 at 10:07:53 PM UTC-7, Fabio Battaglia wrote:

Hello John,
I second the preference the others have for the serial port. Less clutter on the desk (one screen and keyboard less if you have a laptop) and allows for xmodem, PC logging and additional peripherals to be connected in the future.

Fabio B.

On Sep 9, 2015 21:34, "monahanz" <mon...@vitasoft.org> 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

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