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Diffstat (limited to 'src/devices/bus/msx/cart/arc.cpp')
-rw-r--r--src/devices/bus/msx/cart/arc.cpp78
1 files changed, 78 insertions, 0 deletions
diff --git a/src/devices/bus/msx/cart/arc.cpp b/src/devices/bus/msx/cart/arc.cpp
new file mode 100644
index 00000000000..db1a3dd86c6
--- /dev/null
+++ b/src/devices/bus/msx/cart/arc.cpp
@@ -0,0 +1,78 @@
+// license:BSD-3-Clause
+// copyright-holders:Wilbert Pol
+#include "emu.h"
+#include "arc.h"
+
+namespace {
+
+class msx_cart_arc_device : public device_t, public msx_cart_interface
+{
+public:
+ msx_cart_arc_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+ : device_t(mconfig, MSX_CART_ARC, tag, owner, clock)
+ , msx_cart_interface(mconfig, *this)
+ , m_7f(0)
+ { }
+
+ virtual std::error_condition initialize_cartridge(std::string &message) override;
+
+protected:
+ // device_t implementation
+ virtual void device_start() override;
+ virtual void device_reset() override;
+
+private:
+ void io_7f_w(u8 data);
+ u8 io_7f_r();
+
+ u8 m_7f;
+};
+
+void msx_cart_arc_device::device_start()
+{
+ save_item(NAME(m_7f));
+
+ // Install IO read/write handlers
+ io_space().install_write_handler(0x7f, 0x7f, emu::rw_delegate(*this, FUNC(msx_cart_arc_device::io_7f_w)));
+ io_space().install_read_handler(0x7f, 0x7f, emu::rw_delegate(*this, FUNC(msx_cart_arc_device::io_7f_r)));
+}
+
+void msx_cart_arc_device::device_reset()
+{
+ m_7f = 0;
+}
+
+std::error_condition msx_cart_arc_device::initialize_cartridge(std::string &message)
+{
+ if (!cart_rom_region())
+ {
+ message = "msx_cart_arc_device: Required region 'rom' was not found.";
+ return image_error::INTERNAL;
+ }
+
+ if (cart_rom_region()->bytes() != 0x8000)
+ {
+ message = "msx_cart_arc_device: Region 'rom' has unsupported size.";
+ return image_error::INVALIDLENGTH;
+ }
+
+ page(1)->install_rom(0x4000, 0x7fff, cart_rom_region()->base());
+ page(2)->install_rom(0x8000, 0xbfff, cart_rom_region()->base() + 0x4000);
+
+ return std::error_condition();
+}
+
+void msx_cart_arc_device::io_7f_w(u8 data)
+{
+ if (data == 0x35)
+ m_7f++;
+}
+
+u8 msx_cart_arc_device::io_7f_r()
+{
+ return ((m_7f & 0x03) == 0x03) ? 0xda : 0xff;
+}
+
+} // anonymous namespace
+
+DEFINE_DEVICE_TYPE_PRIVATE(MSX_CART_ARC, msx_cart_interface, msx_cart_arc_device, "msx_cart_arc", "MSX Cartridge - Arc")