summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/bus/pce/pce_rom.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/devices/bus/pce/pce_rom.cpp')
-rw-r--r--src/devices/bus/pce/pce_rom.cpp126
1 files changed, 126 insertions, 0 deletions
diff --git a/src/devices/bus/pce/pce_rom.cpp b/src/devices/bus/pce/pce_rom.cpp
new file mode 100644
index 00000000000..8829e7823d0
--- /dev/null
+++ b/src/devices/bus/pce/pce_rom.cpp
@@ -0,0 +1,126 @@
+// license:BSD-3-Clause
+// copyright-holders:Fabio Priuli
+/***********************************************************************************************************
+
+
+ PC-Engine & Turbografx-16 cart emulation
+
+
+ ***********************************************************************************************************/
+
+
+#include "emu.h"
+#include "pce_rom.h"
+
+
+//-------------------------------------------------
+// pce_rom_device - constructor
+//-------------------------------------------------
+
+const device_type PCE_ROM_STD = &device_creator<pce_rom_device>;
+const device_type PCE_ROM_CDSYS3 = &device_creator<pce_cdsys3_device>;
+const device_type PCE_ROM_POPULOUS = &device_creator<pce_populous_device>;
+const device_type PCE_ROM_SF2 = &device_creator<pce_sf2_device>;
+
+
+pce_rom_device::pce_rom_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source)
+ : device_t(mconfig, type, name, tag, owner, clock, shortname, source),
+ device_pce_cart_interface( mconfig, *this )
+{
+}
+
+pce_rom_device::pce_rom_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, PCE_ROM_STD, "PCE & TG16 Carts", tag, owner, clock, "pce_rom", __FILE__),
+ device_pce_cart_interface( mconfig, *this )
+{
+}
+
+pce_cdsys3_device::pce_cdsys3_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : pce_rom_device(mconfig, PCE_ROM_CDSYS3, "PCE & TG16 CD-System Cart v3.00", tag, owner, clock, "pce_cdsys3", __FILE__)
+{
+}
+
+pce_populous_device::pce_populous_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : pce_rom_device(mconfig, PCE_ROM_POPULOUS, "PCE Populous Cart", tag, owner, clock, "pce_populous", __FILE__)
+{
+}
+
+pce_sf2_device::pce_sf2_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : pce_rom_device(mconfig, PCE_ROM_SF2, "PCE Street Fighters 2 Cart", tag, owner, clock, "pce_sf2", __FILE__)
+{
+}
+
+
+//-------------------------------------------------
+// mapper specific start/reset
+//-------------------------------------------------
+
+
+void pce_sf2_device::device_start()
+{
+ save_item(NAME(m_bank_base));
+}
+
+void pce_sf2_device::device_reset()
+{
+ m_bank_base = 0;
+}
+
+
+
+/*-------------------------------------------------
+ mapper specific handlers
+ -------------------------------------------------*/
+
+READ8_MEMBER(pce_rom_device::read_cart)
+{
+ int bank = offset / 0x20000;
+ return m_rom[rom_bank_map[bank] * 0x20000 + (offset & 0x1ffff)];
+}
+
+
+READ8_MEMBER(pce_cdsys3_device::read_cart)
+{
+ int bank = offset / 0x20000;
+ if (!m_ram.empty() && offset >= 0xd0000)
+ return m_ram[offset - 0xd0000];
+
+ return m_rom[rom_bank_map[bank] * 0x20000 + (offset & 0x1ffff)];
+}
+
+WRITE8_MEMBER(pce_cdsys3_device::write_cart)
+{
+ if (!m_ram.empty() && offset >= 0xd0000)
+ m_ram[offset - 0xd0000] = data;
+}
+
+
+READ8_MEMBER(pce_populous_device::read_cart)
+{
+ int bank = offset / 0x20000;
+ if (!m_ram.empty() && offset >= 0x80000 && offset < 0x88000)
+ return m_ram[offset & 0x7fff];
+
+ return m_rom[rom_bank_map[bank] * 0x20000 + (offset & 0x1ffff)];
+}
+
+WRITE8_MEMBER(pce_populous_device::write_cart)
+{
+ if (!m_ram.empty() && offset >= 0x80000 && offset < 0x88000)
+ m_ram[offset & 0x7fff] = data;
+}
+
+
+READ8_MEMBER(pce_sf2_device::read_cart)
+{
+ if (offset < 0x80000)
+ return m_rom[offset];
+ else
+ return m_rom[0x80000 + m_bank_base * 0x80000 + (offset & 0x7ffff)];
+}
+
+WRITE8_MEMBER(pce_sf2_device::write_cart)
+{
+ if (offset >= 0x1ff0 && offset < 0x1ff4)
+ m_bank_base = offset & 3;
+}