summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/msx_cart/super_swangi.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/devices/bus/msx_cart/super_swangi.cpp')
-rw-r--r--src/devices/bus/msx_cart/super_swangi.cpp72
1 files changed, 72 insertions, 0 deletions
diff --git a/src/devices/bus/msx_cart/super_swangi.cpp b/src/devices/bus/msx_cart/super_swangi.cpp
new file mode 100644
index 00000000000..61dffe0d567
--- /dev/null
+++ b/src/devices/bus/msx_cart/super_swangi.cpp
@@ -0,0 +1,72 @@
+// license:BSD-3-Clause
+// copyright-holders:Wilbert Pol
+#include "emu.h"
+#include "super_swangi.h"
+
+
+const device_type MSX_CART_SUPER_SWANGI = &device_creator<msx_cart_super_swangi>;
+
+
+msx_cart_super_swangi::msx_cart_super_swangi(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, MSX_CART_SUPER_SWANGI, "MSX Cartridge - Super Swangi", tag, owner, clock, "msx_cart_super_swangi", __FILE__)
+ , msx_cart_interface(mconfig, *this)
+ , m_selected_bank(0)
+{
+ m_bank_base[0] = m_bank_base[1] = NULL;
+}
+
+
+void msx_cart_super_swangi::device_start()
+{
+ save_item(NAME(m_selected_bank));
+
+ machine().save().register_postload(save_prepost_delegate(FUNC(msx_cart_super_swangi::restore_banks), this));
+}
+
+
+void msx_cart_super_swangi::restore_banks()
+{
+ m_bank_base[0] = get_rom_base();
+ m_bank_base[1] = get_rom_base() + (((m_selected_bank >> 1) * 0x4000) & 0xffff);
+}
+
+
+void msx_cart_super_swangi::device_reset()
+{
+ m_selected_bank = 0;
+}
+
+
+void msx_cart_super_swangi::initialize_cartridge()
+{
+ if (get_rom_size() < 0x10000)
+ {
+ fatalerror("rtype: Invalid ROM size\n");
+ }
+
+ restore_banks();
+}
+
+
+READ8_MEMBER(msx_cart_super_swangi::read_cart)
+{
+ if (offset >= 0x4000 && offset < 0xc000)
+ {
+ return m_bank_base[offset >> 15][offset & 0x3fff];
+ }
+ return 0xff;
+}
+
+
+WRITE8_MEMBER(msx_cart_super_swangi::write_cart)
+{
+ if (offset == 0x8000)
+ {
+ m_selected_bank = data;
+ restore_banks();
+ }
+ else
+ {
+ logerror("msx_cart_super_swangi: unhandled write %02x to %04x\n", data, offset);
+ }
+}