X Window server for NEC 7220

[snip] ISA-bus that Hi After several attempts, the CL GD5420 chip would not respond at all on the S-100 bus. There is a page here on the project http://s100computers.com/My%20System%20Pages/VGA%20Board/VGA%20Board.htm Sometimes things work out and sometimes not so much. There is a third prototype board in build and test but it isn't cooperating either. Without the commented VGA BIOS source listing it is very difficult if not impossible to know exactly what is not working properly. There is just so much about this complex chip we don't know. We've already designed an FPGA style S-100 VGA solution based on the Mylium LAVA. However it has all the same problems as the NEC uPD7220 (not VGA compatible and all software would have to be written from scratch). Also we would need the next generation of Mylium LAVA (Spartan) to get usable VGA bitmap graphics. The technology just is not there yet. http://s100computers.com/My%20System%20Pages/Lava-10%20Board/LAVA-10%20Board .htm Thanks and have a nice day! Andrew Lynch