From a9f751387c483032fac3b3708d81ffc6be461b6e Mon Sep 17 00:00:00 2001
From: Ryan Holtz <ryan.holtz@arrowheadgs.com>
Date: Mon, 11 Feb 2019 07:46:45 +0100
Subject: [PATCH] -8042kbdc: Added timer to periodically check mouse. Fixes
 mouse in IRIX. [Ryan Holtz]

---
 src/devices/machine/8042kbdc.cpp | 14 +++++++++++++-
 src/devices/machine/8042kbdc.h   |  5 +++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/devices/machine/8042kbdc.cpp b/src/devices/machine/8042kbdc.cpp
index 602435369ab..5a7815f3ccd 100644
--- a/src/devices/machine/8042kbdc.cpp
+++ b/src/devices/machine/8042kbdc.cpp
@@ -69,6 +69,9 @@ void kbdc8042_device::device_start()
 	m_sending = 0;
 	m_last_write_to_control = 0;
 	m_status_read_mode = 0;
+
+	m_update_timer = timer_alloc(TIMER_UPDATE);
+	m_update_timer->adjust(attotime::never);
 }
 
 /*-------------------------------------------------
@@ -86,6 +89,8 @@ void kbdc8042_device::device_reset()
 	m_mouse_x = 0;
 	m_mouse_y = 0;
 	m_mouse_btn = 0;
+
+	m_update_timer->adjust(attotime::from_hz(100), 0, attotime::from_hz(100));
 }
 
 void kbdc8042_device::at_8042_set_outport(uint8_t data, int initial)
@@ -195,7 +200,14 @@ void kbdc8042_device::at_8042_clear_keyboard_received()
 	m_mouse.received = 0;
 }
 
-
+void kbdc8042_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
+{
+	if (id == TIMER_UPDATE)
+	{
+		at_8042_check_keyboard();
+		at_8042_check_mouse();
+	}
+}
 
 /* **************************************************************************
  * Port 0x60 Input and Output Buffer (keyboard and mouse data)
diff --git a/src/devices/machine/8042kbdc.h b/src/devices/machine/8042kbdc.h
index f2e7fdfbf04..41ea07e71ba 100644
--- a/src/devices/machine/8042kbdc.h
+++ b/src/devices/machine/8042kbdc.h
@@ -58,8 +58,11 @@ protected:
 	virtual void device_start() override;
 	virtual void device_reset() override;
 	virtual void device_add_mconfig(machine_config &config) override;
+	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
 	virtual ioport_constructor device_input_ports() const override;
 
+	static const device_timer_id TIMER_UPDATE = 0;
+
 private:
 	uint8_t m_inport;
 	uint8_t m_outport;
@@ -112,6 +115,8 @@ private:
 	uint16_t            m_mouse_y;
 	uint8_t             m_mouse_btn;
 
+	emu_timer *			m_update_timer;
+
 	DECLARE_WRITE_LINE_MEMBER( keyboard_w );
 };