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-rw-r--r--src/devices/bus/lpci/northbridge.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/src/devices/bus/lpci/northbridge.c b/src/devices/bus/lpci/northbridge.c
new file mode 100644
index 00000000000..ec5a0a8582a
--- /dev/null
+++ b/src/devices/bus/lpci/northbridge.c
@@ -0,0 +1,48 @@
+// license:BSD-3-Clause
+// copyright-holders:Miodrag Milanovic
+/***************************************************************************
+
+ Northbridge implementation
+
+***************************************************************************/
+
+#include "emu.h"
+#include "northbridge.h"
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+northbridge_device::northbridge_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source)
+ : device_t(mconfig, type, name, tag, owner, clock, shortname, source),
+ m_maincpu(*this, ":maincpu"),
+ m_ram(*this, ":" RAM_TAG)
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void northbridge_device::device_start()
+{
+ address_space& space = machine().device(":maincpu")->memory().space(AS_PROGRAM);
+
+ machine().root_device().membank("bank10")->set_base(m_ram->pointer());
+
+ if (m_ram->size() > 0x0a0000)
+ {
+ offs_t ram_limit = 0x100000 + m_ram->size() - 0x0a0000;
+ space.install_read_bank(0x100000, ram_limit - 1, "bank1");
+ space.install_write_bank(0x100000, ram_limit - 1, "bank1");
+ machine().root_device().membank("bank1")->set_base(m_ram->pointer() + 0xa0000);
+ }
+}
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void northbridge_device::device_reset()
+{
+}