c hello world: ok, I dont know how to debug this further

README.adoc

@@ -252,6 +252,14 @@ Source: link:c_hello_world[]
 
 Single stage, so still limited to 512 bytes of code + data!
 
+To disassemble the generated C code, try:
+
+....
+objdump -D -m i8086 main.elf
+....
+
+TODO: I see several `eax` references still, why?
+
 === No linker script
 
 Print `hello world` without using an explitic linker script:

c_hello_world/README.adoc

@@ -0,0 +1 @@
+https://github.com/cirosantilli/x86-bare-metal-examples#c-hello-world

c_hello_world/entry.S

@@ -2,5 +2,5 @@
 .text
 .global mystart
 mystart:
-    mov %sp, __stack_top
+    mov $__stack_top, %sp
     call main

c_hello_world/main.c

@@ -1,7 +1,10 @@
 void main(void) {
     int i;
     char s[] = "hello world";
+    /* Add a bunch of debug prints to see if the control loop is correct. It is. */
+    __asm__ ("mov $0x0E40, %ax; int $0x10");
     for (i = 0; i < sizeof(s); ++i) {
+        __asm__ ("mov $0x0E41, %ax; int $0x10");
         __asm__ (
             "mov %0, %%ax; int $0x10"
             :
@@ -9,6 +12,7 @@ void main(void) {
             : "%ax"
         );
     }
+    __asm__ ("mov $0x0E40, %ax; int $0x10");
     while (1) {
         __asm__ ("hlt");
     };