From 47fc6fe8bef017d120e6a88f75628003b72b9fe7 Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Sun, 15 Sep 2019 00:05:48 +0200
Subject: Added basic IO receiver/sender

---
 src/io/io.c |  9 +++++++++
 src/io/io.h | 10 ++++++++++
 2 files changed, 19 insertions(+)
 create mode 100644 src/io/io.c
 create mode 100644 src/io/io.h

(limited to 'src/io')

diff --git a/src/io/io.c b/src/io/io.c
new file mode 100644
index 0000000..d617cf2
--- /dev/null
+++ b/src/io/io.c
@@ -0,0 +1,9 @@
+unsigned char receive(unsigned short port) {
+    unsigned char value;
+    __asm__ __volatile__ ("inb %1, %0" : "=a" (value) : "dN" (port));
+    return value;
+}
+
+void send(unsigned short _port, unsigned char _data) {
+    __asm__ __volatile__ ("outb %1, %0" : : "dN" (_port), "a" (_data));
+}
diff --git a/src/io/io.h b/src/io/io.h
new file mode 100644
index 0000000..8d3beda
--- /dev/null
+++ b/src/io/io.h
@@ -0,0 +1,10 @@
+#ifndef MELVIX_IO_H
+#define MELVIX_IO_H
+
+#include <stdint.h>
+
+unsigned char receive(unsigned short port);
+
+void send(unsigned short _port, unsigned char _data);
+
+#endif
-- 
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