Full front-end rewrite

makefile

@@ -1,7 +1,7 @@
 .PHONY: help
 help:
 	@echo
-	@echo "Virtual Boy Emulator - September 30, 2021"
+	@echo "Virtual Boy Emulator - April 14, 2022"
 	@echo
 	@echo "Target build environment is any Debian with the following packages:"
 	@echo "  emscripten"
@@ -31,7 +31,7 @@ bundle:
 
 .PHONY: clean
 clean:
-	@rm -f vbemu_*.html core.wasm
+	@rm -f vbemu_*.html app/core/core.wasm
 
 .PHONY: core
 core:
@@ -42,7 +42,9 @@ core:
 
 .PHONY: wasm
 wasm:
-	@emcc -o core.wasm wasm/wasm.c core/vb.c -Icore -D VB_LITTLEENDIAN \
-        --no-entry -O2 -flto -s WASM=1 -s EXPORTED_RUNTIME_METHODS=[] \
-        -s ALLOW_MEMORY_GROWTH -s MAXIMUM_MEMORY=4GB -fno-strict-aliasing
-	@rm -f *.wasm.tmp*
+	@emcc -o app/core/core.wasm wasm/wasm.c core/vb.c -Icore \
+        -D VB_LITTLEENDIAN --no-entry -O2 -flto -s WASM=1 \
+        -D "VB_EXPORT=__attribute__((used))" \
+        -s EXPORTED_RUNTIME_METHODS=[] -s ALLOW_MEMORY_GROWTH \
+        -s MAXIMUM_MEMORY=4GB -fno-strict-aliasing
+	@rm -f app/core/*.wasm.tmp*