add missing files

terminal_disp.cpp

@@ -0,0 +1,31 @@
+#include <Arduino.h>
+#include <serial_dsp.h>
+#include "disp.h"
+#include "terminal_disp.h"
+
+void terminal_disp::status(const char *s) {
+	_p.println(s);
+}
+
+void terminal_disp::write(uint8_t b) {
+	char c = (char)b;
+	switch(c) {
+	case '_':
+		_p.write(' ');
+		_p.write('\b');
+		_p.write('\b');
+		_p.write('_');
+		_p.write('\b');
+		break;
+	case '\r':
+		_p.write(' ');
+		_p.write('\r');
+		_p.write('\n');
+		break;
+	default:
+		_p.write(b);
+		break;
+	}
+	_p.write('_');
+	_p.write('\b');
+}

terminal_disp.h

@@ -0,0 +1,17 @@
+#ifndef __TERMINAL_DISP_H__
+#define __TERMINAL_DISP_H__
+
+class terminal_disp: public disp {
+public:
+	terminal_disp(Print &p): _p(p) {}
+
+	void checkpoint(Stream &) {}
+	void restore(Stream &) {}
+	void status(const char *);
+	void write(uint8_t);
+
+private:
+	Print &_p;
+};
+
+#endif