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

2 files changed, 19 insertions, 0 deletions

diff --git a/sw/z80/kernel/include/types.h b/sw/z80/kernel/include/types.h
new file mode 100644
index 0000000..adde214
--- /dev/null
+++ b/sw/z80/kernel/include/types.h
@@ -0,0 +1,9 @@
+#ifndef __TYPES_H__
+#define __TYPES_H__
+
+#define int8_t      char
+#define uint8_t     unsigned char
+#define int16_t     int
+#define uint16_t    unsigned int
+
+#endif
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--;
+    }
+}