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Diffstat (limited to 'src/devices/bus/msx_slot/ram.cpp')
-rw-r--r--src/devices/bus/msx_slot/ram.cpp36
1 files changed, 36 insertions, 0 deletions
diff --git a/src/devices/bus/msx_slot/ram.cpp b/src/devices/bus/msx_slot/ram.cpp
new file mode 100644
index 00000000000..cb07422358a
--- /dev/null
+++ b/src/devices/bus/msx_slot/ram.cpp
@@ -0,0 +1,36 @@
+// license:BSD-3-Clause
+// copyright-holders:Wilbert Pol
+
+#include "emu.h"
+#include "ram.h"
+
+const device_type MSX_SLOT_RAM = &device_creator<msx_slot_ram_device>;
+
+msx_slot_ram_device::msx_slot_ram_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, MSX_SLOT_RAM, "MSX Internal RAM", tag, owner, clock, "msx_slot_ram", __FILE__)
+ , msx_internal_slot_interface()
+{
+}
+
+void msx_slot_ram_device::device_start()
+{
+ m_ram.resize(m_size);
+ save_item(NAME(m_ram));
+}
+
+READ8_MEMBER(msx_slot_ram_device::read)
+{
+ if ( offset >= m_start_address && offset < m_end_address )
+ {
+ return m_ram[ offset - m_start_address ];
+ }
+ return 0xFF;
+}
+
+WRITE8_MEMBER(msx_slot_ram_device::write)
+{
+ if ( offset >= m_start_address && offset < m_end_address )
+ {
+ m_ram[offset - m_start_address] = data;
+ }
+}