summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/c64/zaxxon.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/devices/bus/c64/zaxxon.cpp')
-rw-r--r--src/devices/bus/c64/zaxxon.cpp66
1 files changed, 66 insertions, 0 deletions
diff --git a/src/devices/bus/c64/zaxxon.cpp b/src/devices/bus/c64/zaxxon.cpp
new file mode 100644
index 00000000000..22ce1f35ce9
--- /dev/null
+++ b/src/devices/bus/c64/zaxxon.cpp
@@ -0,0 +1,66 @@
+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ Zaxxon/Super Zaxxon cartridge emulation
+
+**********************************************************************/
+
+#include "zaxxon.h"
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type C64_ZAXXON = &device_creator<c64_zaxxon_cartridge_device>;
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// c64_zaxxon_cartridge_device - constructor
+//-------------------------------------------------
+
+c64_zaxxon_cartridge_device::c64_zaxxon_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+ device_t(mconfig, C64_ZAXXON, "C64 Zaxxon cartridge", tag, owner, clock, "c64_zaxxon", __FILE__),
+ device_c64_expansion_card_interface(mconfig, *this)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void c64_zaxxon_cartridge_device::device_start()
+{
+ // state saving
+ save_item(NAME(m_bank));
+}
+
+
+//-------------------------------------------------
+// c64_cd_r - cartridge data read
+//-------------------------------------------------
+
+UINT8 c64_zaxxon_cartridge_device::c64_cd_r(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2)
+{
+ if (!roml)
+ {
+ data = m_roml[offset & 0xfff];
+
+ m_bank = BIT(offset, 12);
+ }
+ else if (!romh)
+ {
+ offs_t addr = (m_bank << 13) | (offset & 0x1fff);
+ data = m_romh[addr];
+ }
+
+ return data;
+}