new approach for dos port

Player/Makefile

@@ -3,8 +3,9 @@ RELEASE ?= 0 # Optimize.
 DEBUG 	?= 1 # Emit debug info.
 SQUEEZE ?= 0 # Nuclear option to save space.
 BITS 	?= 64
-CFLAGS = -Wall -std=gnu99 -flto=thin -ffast-math -fno-ident -fvisibility=hidden
+CFLAGS = -Wall -std=gnu99 -flto=thin -ffast-math -fno-ident -fvisibility=hidden -fuse-ld=lld
 ifeq ($(MAKECMDGOALS),linux)
+	CFLAGS += -fno-pic -fno-pie
 	ifeq ($(RELEASE), 1)
 	    CFLAGS += -Wl,--ignore-data-address-equality -Wl,--ignore-function-address-equality \
 	    		  -Wl,--optimize-bb-jumps
@@ -30,7 +31,7 @@ else
     CFLAGS += -DNDEBUG -Wl,--strip-all
 endif
 ifeq ($(RELEASE), 1)
-    CFLAGS += -O1 -fuse-ld=lld -fmerge-all-constants -Wl,-O3 \
+    CFLAGS += -O3 -fmerge-all-constants -Wl,-O3 \
     		  -ffunction-sections -fdata-sections -Wl,--gc-sections \
     		  -Wl,-mllvm,--vectorize-slp=true \
     		  -Wl,-mllvm,--enable-gvn-hoist=true
@@ -49,6 +50,9 @@ DOS = maindos.c Display/dos.c
 %.o: %.c $(DEPS)
 	$(CC) -c -o $@ $< $(CFLAGS)
 
+%.o: %.s $(DEPS)
+	$(CC) -c -o $@ $< $(CFLAGS)
+
 # TODO: Make it work with no stdlib.
 linux: CFLAGS += -static -mbmi2 -nostdlib
 linux: $(LINUX) | $(SRC)
@@ -59,9 +63,14 @@ wasm: CFLAGS += --target=wasm32 -nostdlib -Wl,--no-entry -msimd128 -mbulk-memory
 wasm:
 	$(CC) -o player.wasm $(WASM) $(CFLAGS)
 
-# TODO: Use https://github.com/amindlost/pmodew
-dos: $(DOS) $(DEPS)
-	wcl386 -bt=dos4g -ox -l=dos4g $(DOS)
+# https://tippach.hier-im-netz.de/wdosx
+dos: CFLAGS += -ffreestanding -m32 -fno-PIC -fno-PIE -no-pie -nostdlib -nodefaultlibs
+dos:
+	$(CC) -c ./Main/dos.s -o ./Main/dos.o $(CFLAGS)
+	$(CC) -c ./Display/dos.c -o ./Display/dos.o $(CFLAGS)
+	ld.lld -m elf_i386 --oformat binary -Ttext 0x0 --image-base=0x0 ./Main/dos.o ./Display/dos.o -o dos.bin
+	dosbox -noconsole -c "mount c $(PWD)" -c "c:" -c "WDOSX\STUBIT.EXE DOS.BIN" -exit
+	mv ./DOS.BIN ./DOS.EXE
 
 clean:
 	rm -r *.o ../*.o