Initial commit, basically just a 'hello world' with a Makefile

.gitignore

@@ -36,6 +36,7 @@
 *.i*86
 *.x86_64
 *.hex
+*.img
 
 # Debug files
 *.dSYM/

Makefile

@@ -0,0 +1,64 @@
+# Directory layout
+SRCDIR = src
+OBJDIR = obj
+INCDIR = include
+
+# Compiler and flags
+CC = wcc386
+LD = wlink
+CFLAGS = -zq -i=$(INCDIR)
+
+# Project name (root) — everything else derives from this
+NAME = dspace
+TARGET = $(NAME).exe
+IMG = $(NAME).img
+
+# Deploy location for testing in DOSBox-X
+DOSBOX_DRIVE = ~/DosBox-x/C_Drive
+
+# OpenWatcom DOS extender stub, needed on the disk image alongside TARGET
+DOS4GW = ~/openwatcom_c/binw/dos4gw.exe
+
+# Disk image geometry (1.44MB floppy, FAT12)
+IMG_BLOCKS = 1440
+IMG_FAT = 12
+
+# Source and object files
+SRCS = $(wildcard $(SRCDIR)/*.c)
+OBJS = $(patsubst $(SRCDIR)/%.c,$(OBJDIR)/%.o,$(SRCS))
+DEPS = $(OBJS:.o=.d)
+
+# Default target
+all: $(TARGET)
+
+# Link object files into executable
+$(TARGET): $(OBJS)
+	$(LD) system dos4g name $@ file { $(OBJS) }
+
+# Compile .c files to .o files, with auto-dependency generation
+$(OBJDIR)/%.o: $(SRCDIR)/%.c | $(OBJDIR)
+	$(CC) -fo=$@ $(CFLAGS) -ad=$(@:.o=.d) -adfs $<
+
+# Ensure obj/ exists before any compile runs
+$(OBJDIR):
+	mkdir -p $(OBJDIR)
+
+# Pull in auto-generated header dependencies (silently ignored if missing)
+-include $(DEPS)
+
+# Clean up build artifacts
+clean:
+	rm -f $(OBJS) $(DEPS) $(TARGET) $(IMG)
+
+test: $(TARGET)
+	cp $(TARGET) $(DOSBOX_DRIVE)/
+	echo 'Ready to test'
+
+image: $(TARGET)
+	rm -f $(IMG)
+	dd if=/dev/zero of=$(IMG) bs=1024 count=$(IMG_BLOCKS)
+	mkfs.vfat -F $(IMG_FAT) $(IMG)
+	mcopy -i $(IMG) $(TARGET) ::
+	mcopy -i $(IMG) $(DOS4GW) ::
+
+.PHONY: all clean test image

include/util.h

@@ -0,0 +1,6 @@
+#ifndef _UTIL_H_
+#define _UTIL_H_
+
+void displayMessage(int n);
+
+#endif

ow_setup.sh

@@ -0,0 +1,3 @@
+export WATCOM=~/openwatcom_c
+export PATH=$WATCOM/bin:$WATCOM/binl:$WATCOM/binw:$PATH
+export INCLUDE=$WATCOM/lh

src/main.c

@@ -0,0 +1,15 @@
+#include <stdio.h>
+
+#include "util.h" 
+
+void main() {
+  int i = 0;
+
+  printf("DSPACE starting...\n");
+
+  for (i = 0; i < 10; i++) {
+    displayMessage(i + 1);
+  }
+
+  return;
+}

src/util.c

@@ -0,0 +1,5 @@
+#include <stdio.h>
+
+void displayMessage(int n) {
+    printf("%02d: Hello MS-DOS!\n", n);
+  }