summaryrefslogtreecommitdiffstats
path: root/src/devices/bus/coleco/xin1.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/devices/bus/coleco/xin1.cpp')
-rw-r--r--src/devices/bus/coleco/xin1.cpp72
1 files changed, 72 insertions, 0 deletions
diff --git a/src/devices/bus/coleco/xin1.cpp b/src/devices/bus/coleco/xin1.cpp
new file mode 100644
index 00000000000..3538f93bb90
--- /dev/null
+++ b/src/devices/bus/coleco/xin1.cpp
@@ -0,0 +1,72 @@
+// license:BSD-3-Clause
+// copyright-holders:Wilbert Pol
+/**********************************************************************
+
+ ColecoVision X-in-1 cartridge emulation
+
+**********************************************************************/
+
+#include "emu.h"
+#include "xin1.h"
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(COLECOVISION_XIN1, colecovision_xin1_cartridge_device, "colecovision_xin1", "ColecoVision X-in-1 cartridge")
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// colecovision_xin1_cartridge_device - constructor
+//-------------------------------------------------
+
+colecovision_xin1_cartridge_device::colecovision_xin1_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
+ device_t(mconfig, COLECOVISION_XIN1, tag, owner, clock),
+ device_colecovision_cartridge_interface(mconfig, *this),
+ m_current_offset(0)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void colecovision_xin1_cartridge_device::device_start()
+{
+}
+
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void colecovision_xin1_cartridge_device::device_reset()
+{
+ m_current_offset = m_rom_size - 0x8000;
+}
+
+
+//-------------------------------------------------
+// read - cartridge data read
+//-------------------------------------------------
+
+uint8_t colecovision_xin1_cartridge_device::bd_r(address_space &space, offs_t offset, uint8_t data, int _8000, int _a000, int _c000, int _e000)
+{
+ if (!_8000 || !_a000 || !_c000 || !_e000)
+ {
+ data = m_rom[m_current_offset + offset];
+ if (!_e000 && offset >= 0x7fc0) {
+ m_current_offset = (0x8000 * (offset - 0x7fc0)) % m_rom_size;
+ }
+ }
+
+ return data;
+}