Adding '-version' shell option (#299)

Author: Schol-R-LEA

.gitignore

@@ -3,6 +3,7 @@ x16emu
 x16emu.exe
 x16emu_mac.zip
 x16emu_win.zip
+x16-rom
 rom_labels.h
 rom.bin
 chargen.bin
@@ -13,5 +14,4 @@ x16emu.html
 x16emu.html.mem
 x16emu.js
 x16emu.wasm
-x16emu.worker.js
-
+x16emu.worker.js

disasm.c

@@ -19,7 +19,7 @@
 
 int disasm(uint16_t pc, uint8_t *RAM, char *line, unsigned int max_line, bool debugOn, uint8_t bank) {
 	uint8_t opcode = real_read6502(pc, debugOn, bank);
-	const char *mnemonic = mnemonics[opcode];
+	char const *mnemonic = mnemonics[opcode];
 
 	//
 	//		Test for branches, relative address. These are BRA ($80) and

main.c

@@ -34,6 +34,7 @@
 #include "rom_symbols.h"
 #include "ym2151.h"
 #include "audio.h"
+#include "version.h"
 
 #ifdef __EMSCRIPTEN__
 #include <emscripten.h>
@@ -379,7 +380,8 @@ is_kernal()
 static void
 usage()
 {
-	printf("\nCommander X16 Emulator  (C)2019 Michael Steil\n");
+	printf("\nCommander X16 Emulator\tv.%s (%s)", VER, VER_NAME);
+	printf("(C)2019,2020 Michael Steil\n");
 	printf("All rights reserved. License: 2-clause BSD\n\n");
 	printf("Usage: x16emu [option] ...\n\n");
 	printf("-rom <rom.bin>\n");
@@ -446,6 +448,8 @@ usage()
 	printf("\tPrint instruction trace. Optionally, a trigger address\n");
 	printf("\tcan be specified.\n");
 #endif
+	printf("-version\n");
+	printf("\tPrint additional version information the emulator and ROM.\n"); 
 	printf("\n");
 	exit(1);
 }
@@ -772,6 +776,11 @@ main(int argc, char **argv)
 			audio_buffers = (int)strtol(argv[0], NULL, 10);
 			argc--;
 			argv++;
+		} else if (!strcmp(argv[0], "-version")){
+			printf("%s", VER_INFO);
+			argc--;
+			argv++;
+                        exit(0);
 		} else {
 			usage();
 		}

version.h

@@ -0,0 +1,7 @@
+// Commander X16 Emulator
+// Copyright (c) 2019, 2020 Michael Steil
+// All rights reserved. License: 2-clause BSD
+
+#define VER "37"
+#define VER_NAME "Geneva"
+#define VER_INFO "### Release 37 (\"Geneva\")\n"