switch to sdcc

    - update of the makefile to use sdcc, since it is more popular and
    it's easier to insall on other computers

    - fix of crt0.s (old loader.asm) for the new compiler

    - change of the structure in the source code folder to separate
      betweeen libc and kernel code

3 files changed, 10 insertions, 7 deletions

diff --git a/sw/z80/kernel.c b/sw/z80/kernel.c
deleted file mode 100644
index 172eee1..0000000
--- a/sw/z80/kernel.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include "types.h"
-
-
-void main(void)
-{
-
-}
diff --git a/sw/z80/types.h b/sw/z80/kernel/include/types.h
index adde214..adde214 100644
--- a/sw/z80/types.h
+++ b/sw/z80/kernel/include/types.h
diff --git a/sw/z80/kernel/kernel.c b/sw/z80/kernel/kernel.c
new file mode 100644
index 0000000..fe87c3d
--- /dev/null
+++ b/sw/z80/kernel/kernel.c
@@ -0,0 +1,10 @@
+#include "types.h"
+
+
+void main(void)
+{
+    int i, j = 20;
+    for (i = 0; i < 10; i++) {
+        j--;
+    }
+}