Added temporary Puts() syscall to print a string. I use it in calc to print a message

include/interrupt/syscall.h

@@ -2,6 +2,7 @@
 #define SYSCALL_H
 
 #include <interrupt/pit.h>
+#include <screen/text.h>
 
 // System call count
 #define MAX_SYSCALLS 2
@@ -17,9 +18,19 @@ void sys_sleep() {
     }
 }
 
+// TODO: Use a Write() syscall and write to stdout
+// Args: ebx - string pointer
+void sys_puts() {
+    char* s;
+    __asm__ volatile ("movl %%ebx, %0" : "=r"(s));
+
+    print(s);
+}
+
 // System call table
 void* syscalls[MAX_SYSCALLS] = {
     sys_sleep, 
+    sys_puts, 
 };
 
 // int 0x80 - Syscall interrupt, handled by this function

src/calc.c

@@ -2,6 +2,14 @@
 
 __attribute__ ((section ("entry")))
 void main() {
+    *(char*)(0x2000) = 'H';
+    *(char*)(0x2001) = 'e';
+    *(char*)(0x2002) = 'l';
+    *(char*)(0x2003) = 'l';
+    *(char*)(0x2004) = 'o';
+    *(char*)(0x2005) = '!';
+    *(char*)(0x2006) = '\0';
+    __asm__ volatile ("int $0x80" : : "a"(1), "b"(0x2000));
     sleep(4500); // Wait 4.5 seconds
 
     return;

src/kernel.c

@@ -6,11 +6,11 @@
 #include <interrupt/syscall.h>
 #include <interrupt/pic.h>
 #include <ports/io.h>
-#include <c/string.h>
+#include <string.h>
 #include <screen/graphics.h>
 #include <keyboard/keyboard.h>
 #include <interrupt/pit.h>
-#include <c/time.h>
+#include <time.h>
 
 #define PROMPT "#> "