user submissions

  • Virtual 7-Segment Display Generator for the Papilio Arcade

      Here’s some more user-contributed code from reader Alex, this time on making a virtual 7-segment display on the Papilio Arcade in VHDL. The 7-segment display is outputted to VGA, and can be used to superimpose alphanumeric characters on top of any video already coming out on VGA.  The position, size, and color of the…

  • Translating Verilog to VHDL for Galaxian

    A little while back, we received some user contributed code from reader and Papilio user Alex, for converting Verilog code to VHDL.  The article illustrates the conversion for the game Galaxian.  If you’re learning VHDL, or are interested in Verilog to VHDL conversion, Alex’s article lays it  out nicely for you with examples from Katsumi Degawa’s Galaxian FPGA project. With…