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-rw-r--r--src/devices/bus/pce/pce_scdsys.cpp98
1 files changed, 98 insertions, 0 deletions
diff --git a/src/devices/bus/pce/pce_scdsys.cpp b/src/devices/bus/pce/pce_scdsys.cpp
new file mode 100644
index 00000000000..78b413f9d31
--- /dev/null
+++ b/src/devices/bus/pce/pce_scdsys.cpp
@@ -0,0 +1,98 @@
+// license:BSD-3-Clause
+// copyright-holders:Fabio Priuli, Wilbert Pol
+/***********************************************************************************************************
+
+
+ PC-Engine & Turbografx-16 Super System Card emulation
+
+
+ ***********************************************************************************************************/
+
+
+#include "emu.h"
+#include "pce_scdsys.h"
+
+
+
+//-------------------------------------------------
+// pce_cdsys3_device - constructor
+//-------------------------------------------------
+
+DEFINE_DEVICE_TYPE(PCE_ROM_CDSYS3J, pce_cdsys3j_device, "pce_cdsys3j", "PCE Super System Card")
+DEFINE_DEVICE_TYPE(PCE_ROM_CDSYS3U, pce_cdsys3u_device, "pce_cdsys3u", "TG16 Super System Card")
+
+
+pce_cdsys3_device::pce_cdsys3_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, type, tag, owner, clock)
+ , device_pce_cart_interface(mconfig, *this)
+ , m_scdsys()
+{
+}
+
+pce_cdsys3j_device::pce_cdsys3j_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : pce_cdsys3_device(mconfig, PCE_ROM_CDSYS3J, tag, owner, clock)
+{
+}
+
+pce_cdsys3u_device::pce_cdsys3u_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : pce_cdsys3_device(mconfig, PCE_ROM_CDSYS3U, tag, owner, clock)
+{
+}
+
+pce_scdsys_shared::pce_scdsys_shared()
+ : m_ram(nullptr)
+ , m_region(false)
+{
+}
+
+
+//-------------------------------------------------
+// mapper specific start/reset
+//-------------------------------------------------
+
+void pce_cdsys3_device::device_start()
+{
+ m_scdsys.init(*this);
+ m_scdsys.set_region(false);
+}
+
+void pce_cdsys3u_device::device_start()
+{
+ pce_cdsys3_device::device_start();
+ m_scdsys.set_region(true);
+}
+
+void pce_scdsys_shared::init(device_t &device)
+{
+ m_ram = make_unique_clear<uint8_t[]>(0x30000);
+
+ device.save_pointer(NAME(m_ram), 0x30000);
+}
+
+/*-------------------------------------------------
+ mapper specific handlers
+ -------------------------------------------------*/
+
+uint8_t pce_scdsys_shared::register_r(offs_t offset)
+{
+ switch (offset & 0x0f)
+ {
+ // TODO: 0x1 through 0x3 is Super CD-ROM²/PCE Duo stuff?
+ case 0x1: return 0xaa;
+ case 0x2: return 0x55;
+ case 0x3: return 0x00;
+ case 0x5: return (m_region) ? 0x55 : 0xaa;
+ case 0x6: return (m_region) ? 0xaa : 0x55;
+ case 0x7: return 0x03;
+ }
+ return 0x00;
+}
+
+
+void pce_cdsys3_device::install_memory_handlers(address_space &space)
+{
+ // TODO: ROM address mirrored?
+ space.install_rom(0x000000, 0x03ffff, 0x040000, m_rom);
+ space.install_ram(0x0d0000, 0x0fffff, m_scdsys.ram());
+ space.install_read_handler(0x1ff8c0, 0x1ff8c7, 0, 0x330, 0, emu::rw_delegate(*this, FUNC(pce_cdsys3_device::register_r)));
+}