Improved "show" help message

diff --git a/passes/cmds/show.cc b/passes/cmds/show.cc
index 3c4ce85d89f4dac329235acc0a3887d201835fec..3a3939a81934deb95a6f9a05eaa100534f50f404 100644 (file)
--- a/passes/cmds/show.cc
+++ b/passes/cmds/show.cc
@@ -582,8 +582,9 @@ struct ShowPass : public Pass {
                log("        Run the specified command with the graphics file as parameter.\n");
                log("\n");
                log("    -format <format>\n");
-               log("        Generate a graphics file in the specified format.\n");
-               log("        Usually <format> is 'svg' or 'ps'.\n");
+               log("        Generate a graphics file in the specified format. Use 'dot' to just\n");
+               log("        generate a .dot file, or other <format> strings such as 'svg' or 'ps'\n");
+               log("        to generate files in other formats (this calls the 'dot' command).\n");
                log("\n");
                log("    -lib <verilog_or_ilang_file>\n");
                log("        Use the specified library file for determining whether cell ports are\n");
@@ -646,7 +647,8 @@ struct ShowPass : public Pass {
                log("unless another prefix is specified using -prefix <prefix>.\n");
                log("\n");
                log("Yosys on Windows and YosysJS use different defaults: The output is written\n");
-               log("to 'show.dot' in the current directory and new viewer is launched.\n");
+               log("to 'show.dot' in the current directory and new viewer is launched each time\n");
+               log("the 'show' command is executed.\n");
                log("\n");
        }
        virtual void execute(std::vector<std::string> args, RTLIL::Design *design)