From 06f385b6cdd20de6df8df0d1718d43092bfd22ae Mon Sep 17 00:00:00 2001
From: Stephen Crane <jscrane@gmail.com>
Date: Tue, 12 Feb 2019 18:19:09 +0000
Subject: [PATCH] serial filer

---
 r65emu.h         |  1 +
 serial_filer.cpp | 30 ++++++++++++++++++++++++++++++
 serial_filer.h   | 19 +++++++++++++++++++
 3 files changed, 50 insertions(+)
 create mode 100644 serial_filer.cpp
 create mode 100644 serial_filer.h

diff --git a/r65emu.h b/r65emu.h
index 0113082..5c641df 100644
--- a/r65emu.h
+++ b/r65emu.h
@@ -11,6 +11,7 @@
 #include "keyboard.h"
 #include "serialio.h"
 #include "filer.h"
+#include "serial_filer.h"
 #include "timed.h"
 #include "hardware.h"
 #include "sound_dac.h"
diff --git a/serial_filer.cpp b/serial_filer.cpp
new file mode 100644
index 0000000..56fee79
--- /dev/null
+++ b/serial_filer.cpp
@@ -0,0 +1,30 @@
+#include <Arduino.h>
+#include <stdint.h>
+#include "hardware.h"
+#include "serialio.h"
+#include "filer.h"
+#include "serial_filer.h"
+
+bool serial_filer::start(const char *) {
+	Serial.begin(TERM_SPEED);
+	return true;
+}
+
+void serial_filer::write(uint8_t b) {
+	Serial.write(b);
+}
+
+uint8_t serial_filer::read() {
+	return Serial.read();
+}
+
+bool serial_filer::more() {
+	return Serial.available() > 0;
+}
+
+const char *serial_filer::checkpoint() {
+	return 0;
+}
+
+void serial_filer::restore(const char *) {
+}
diff --git a/serial_filer.h b/serial_filer.h
new file mode 100644
index 0000000..36a5e29
--- /dev/null
+++ b/serial_filer.h
@@ -0,0 +1,19 @@
+#ifndef __SERIAL_FILER_H__
+#define __SERIAL_FILER_H__
+
+class serial_filer: public filer {
+public:
+	const char *advance() { return "serial"; }
+	const char *rewind() { return advance(); }
+
+	const char *checkpoint();
+	void restore(const char *);
+
+	bool start(const char *);
+	void stop() {}
+
+	uint8_t read();
+	bool more();
+	void write(uint8_t);
+};
+#endif