From 82daa5e89908e89e03147f42ad9226938576024f Mon Sep 17 00:00:00 2001
From: TC1995 <mariogplayer90@gmail.com>
Date: Sat, 8 Oct 2016 23:50:49 +0200
Subject: [PATCH] (nw)

---
 src/mouse_amstrad.c | 63 +++++++++++++++++++++++++++++++++++++++++++++
 src/mouse_amstrad.h |  4 +++
 2 files changed, 67 insertions(+)
 create mode 100644 src/mouse_amstrad.c
 create mode 100644 src/mouse_amstrad.h

diff --git a/src/mouse_amstrad.c b/src/mouse_amstrad.c
new file mode 100644
index 000000000..e880f15c9
--- /dev/null
+++ b/src/mouse_amstrad.c
@@ -0,0 +1,63 @@
+/* Copyright holders: SA1988, Curt Coder
+   see COPYING for more details
+*/
+#include "ibm.h"
+#include "io.h"
+#include "mouse.h"
+#include "mouse_amstrad.h"
+
+static int amstrad_x = 0, amstrad_y = 0, amstrad_b = 0;
+
+uint8_t mouse_amstrad_read(uint16_t port, void *priv)
+{
+	switch (port)
+	{
+		case 0x78:
+		return amstrad_x;
+		
+		case 0x7a:
+		return amstrad_y;
+	}
+	return 0xff;
+}
+
+void mouse_amstrad_write(uint16_t port, uint8_t val, void *priv)
+{
+	switch (port)
+	{
+		case 0x78:
+		amstrad_x = 0;
+		break;
+		
+		case 0x7a:
+		amstrad_y = 0;
+		break;
+	}
+}
+
+void mouse_amstrad_poll(int x, int y, int b)
+{
+        if (!x && !y && b==amstrad_b) return;
+
+        amstrad_b=b;
+		if (x > amstrad_x)
+			amstrad_x+=3;
+		else
+			amstrad_x-=3;
+		
+		amstrad_x = x;
+		
+		if (y > amstrad_y)
+			amstrad_y+=3;
+		else
+			amstrad_y-=3;		
+		
+        amstrad_y = y;
+}
+
+void mouse_amstrad_init()
+{
+        mouse_poll = mouse_amstrad_poll;
+		io_sethandler(0x0078, 0x0001, mouse_amstrad_read, NULL, NULL, mouse_amstrad_write, NULL, NULL, NULL);
+		io_sethandler(0x007a, 0x0001, mouse_amstrad_read, NULL, NULL, mouse_amstrad_write, NULL, NULL, NULL);
+}
diff --git a/src/mouse_amstrad.h b/src/mouse_amstrad.h
new file mode 100644
index 000000000..922397d7b
--- /dev/null
+++ b/src/mouse_amstrad.h
@@ -0,0 +1,4 @@
+/* Copyright holders: SA1988
+   see COPYING for more details
+*/
+void mouse_amstrad_init();