Commit 99c88ec

@@ -0,0 +1,2 @@
+*.o
+*.exe

@@ -11,3 +11,8 @@ numbers.txt:
 
 run: main.exe numbers.txt
 	./main.exe < numbers.txt
+
+manual: max_min.s
+	as --64 -o max_min.o max_min.s
+	ld -o max_min.exe max_min.o
+	./max_min.exe

@@ -0,0 +1,17 @@
+        .global _start
+
+        .text
+_start:
+        # write(1, message, 13)
+        mov     $1, %rax                # system call 1 is write
+        mov     $1, %rdi                # file handle 1 is stdout
+        mov     $message, %rsi          # address of string to output
+        mov     $13, %rdx               # number of bytes
+        syscall                         # invoke operating system to do the write
+
+        # exit(0)
+        mov     $60, %rax               # system call 60 is exit
+        xor     %rdi, %rdi              # we want return code 0
+        syscall                         # invoke operating system to exit
+message:
+        .ascii  "Hello, world\n"