From e0af89a890a5e1706b51200ed077e89b9c248f2f Mon Sep 17 00:00:00 2001
From: Patrick Mackinlay <pmackinlay@hotmail.com>
Date: Wed, 31 Oct 2018 19:08:04 +0700
Subject: [PATCH] aic6250: ready for 16 bit dma (nw)

---
 src/devices/machine/aic6250.cpp | 19 +++++++++++++++++++
 src/devices/machine/aic6250.h   |  2 ++
 2 files changed, 21 insertions(+)

diff --git a/src/devices/machine/aic6250.cpp b/src/devices/machine/aic6250.cpp
index 4ae438d1e08..f9ab06d71a5 100644
--- a/src/devices/machine/aic6250.cpp
+++ b/src/devices/machine/aic6250.cpp
@@ -1011,9 +1011,28 @@ u8 aic6250_device::dma_r()
 	return data;
 }
 
+u16 aic6250_device::dma16_r()
+{
+	u16 data = m_fifo.dequeue();
+
+	data |= u16(m_fifo.dequeue()) << 8;
+
+	LOGMASKED(LOG_DMA, "dma16_r 0x%04x\n", data);
+
+	return data;
+}
+
 void aic6250_device::dma_w(u8 data)
 {
 	LOGMASKED(LOG_DMA, "dma_w 0x%02x\n", data);
 
 	m_fifo.enqueue(data);
 }
+
+void aic6250_device::dma16_w(u16 data)
+{
+	LOGMASKED(LOG_DMA, "dma16_w 0x%04x\n", data);
+
+	m_fifo.enqueue(data);
+	m_fifo.enqueue(data >> 8);
+}
diff --git a/src/devices/machine/aic6250.h b/src/devices/machine/aic6250.h
index c7ebbc1370a..029c7f72dca 100644
--- a/src/devices/machine/aic6250.h
+++ b/src/devices/machine/aic6250.h
@@ -29,7 +29,9 @@ public:
 	DECLARE_WRITE8_MEMBER(write);
 
 	u8 dma_r();
+	u16 dma16_r();
 	void dma_w(u8 data);
+	void dma16_w(u16 data);
 
 protected:
 	// standard device_interface overrides