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Diffstat (limited to 'src/devices/bus/msx_cart/superloderunner.cpp')
-rw-r--r--src/devices/bus/msx_cart/superloderunner.cpp62
1 files changed, 62 insertions, 0 deletions
diff --git a/src/devices/bus/msx_cart/superloderunner.cpp b/src/devices/bus/msx_cart/superloderunner.cpp
new file mode 100644
index 00000000000..c8bd6f6c973
--- /dev/null
+++ b/src/devices/bus/msx_cart/superloderunner.cpp
@@ -0,0 +1,62 @@
+// license:BSD-3-Clause
+// copyright-holders:Wilbert Pol
+#include "emu.h"
+#include "superloderunner.h"
+
+const device_type MSX_CART_SUPERLODERUNNER = &device_creator<msx_cart_superloderunner>;
+
+
+msx_cart_superloderunner::msx_cart_superloderunner(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, MSX_CART_SUPERLODERUNNER, "MSX Cartridge - Super Lode Runner", tag, owner, clock, "msx_cart_superloderunner", __FILE__)
+ , msx_cart_interface(mconfig, *this)
+ , m_selected_bank(0)
+ , m_bank_base(NULL)
+{
+}
+
+
+void msx_cart_superloderunner::device_start()
+{
+ save_item(NAME(m_selected_bank));
+
+ machine().save().register_postload(save_prepost_delegate(FUNC(msx_cart_superloderunner::restore_banks), this));
+
+ // Install evil memory write handler
+ address_space &space = machine().device<cpu_device>("maincpu")->space(AS_PROGRAM);
+ space.install_write_handler(0x0000, 0x0000, write8_delegate(FUNC(msx_cart_superloderunner::banking), this));
+}
+
+
+void msx_cart_superloderunner::restore_banks()
+{
+ m_bank_base = get_rom_base() + (m_selected_bank & 0x0f) * 0x4000;
+}
+
+
+void msx_cart_superloderunner::initialize_cartridge()
+{
+ if (get_rom_size() != 0x20000)
+ {
+ fatalerror("superloderunner: Invalid ROM size\n");
+ }
+
+ restore_banks();
+}
+
+
+READ8_MEMBER(msx_cart_superloderunner::read_cart)
+{
+ if (offset >= 0x8000 && offset < 0xc000)
+ {
+ return m_bank_base[offset & 0x3fff];
+ }
+
+ return 0xff;
+}
+
+
+WRITE8_MEMBER(msx_cart_superloderunner::banking)
+{
+ m_selected_bank = data;
+ restore_banks();
+}