MAKE CURRENTLY DOESNT COMPILE I WILL FIX LATER :3333

.gitignore

@@ -1,2 +1,5 @@
 badloader.img
 baddos.img
+kernel_entry.o
+kernel.o
+kernel.bin

Makefile

@@ -0,0 +1,12 @@
+all: bootloader baddos
+
+bootloader:
+	nasm -f bin main.asm -o badloader.img
+kernel:
+	nasm -f elf kernel_entry.asm -o kernel_entry.o
+	gcc -m16 -ffreestanding -c kernel.c -o kernel.o
+	ld -m elf_i386 -T linker.ld --oformat binary kernel_entry.o kernel.o -o kernel.bin
+baddos: bootloader kernel
+	cat badloader.img kernel.bin > baddos.img
+clean:
+	rm -f *.o *.img *.bin

kernel.c

@@ -11,7 +11,7 @@ void print(const char* str) {
     }
 }
 
-void main() {
+void kernel_main() {
     print("Welcome to BadDOS!\r\n");
     print("type something or die:\r\n");
 
@@ -21,4 +21,25 @@ void main() {
         print_char(c);
         if (c == '\r') print("\r\n");
     }
+}
+
+char get_char() {
+    char c;
+    __asm__ __volatile__(
+        "mov ah, 0x00;"
+        "int 0x16;"
+        "mov %[char], al;"
+        : [char] "=r" (c)
+    );
+    return c;
+}
+
+void print_char(char c) {
+    __asm__ __volatile__(
+        "mov ah, 0x0E;"
+        "mov al, %[char];"
+        "int 0x10;"
+        :
+        : [char] "r" (c)
+    );
 }

kernel_entry.asm

@@ -1,7 +1,11 @@
 ; wait, WHAT? we have a bad DOS now????? This is absurd! You can't just add a SECOND project into the FIRST project.
 
 [BITS 16]
-[ORG 0x7E00]
+[GLOBAL start]
+[EXTERN kernel_main]
+
+
+
 
 start:
     cli

linker.ld

@@ -0,0 +1,15 @@
+SECTIONS {
+    . = 0x7E00;
+
+    .text : {
+        *(.text)
+    }
+
+    .data : {
+        *(.data)
+    }
+
+    .bss : {
+        *(.bss)
+    }
+}