Import newlib and create makefile

1 files changed, 36 insertions, 0 deletions

diff --git a/newlib/libc/sys/sysnec810/write.c b/newlib/libc/sys/sysnec810/write.c
new file mode 100644
index 0000000..96c1e49
--- /dev/null
+++ b/newlib/libc/sys/sysnec810/write.c
@@ -0,0 +1,36 @@
+static volatile char *data = (char *)(0x20);
+static volatile char *control = (char *)(0x24);
+
+extern void _outb (volatile char*, unsigned char);
+extern unsigned char _inb (volatile char*);
+
+static unsigned char
+ read_scc_reg (unsigned char n)
+{
+  _outb (control, n);
+  return _inb(control);
+}
+
+static void write_scc_data (unsigned char n)
+{
+  _outb (data, n);
+}
+
+int
+_write (int dev, void *buf, unsigned int len)
+{
+  int i;
+  char *string = (char*)buf;
+
+  for (i = 0; i < len; i++) 
+    {
+      int j;
+
+      for (j = 0 ; j < 5000; j++)
+	;
+      write_scc_data (string[i]);
+
+    }
+  return len;
+}
+