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Diffstat (limited to 'src/devices/bus/msx/slot/sony08.cpp')
-rw-r--r--src/devices/bus/msx/slot/sony08.cpp90
1 files changed, 90 insertions, 0 deletions
diff --git a/src/devices/bus/msx/slot/sony08.cpp b/src/devices/bus/msx/slot/sony08.cpp
new file mode 100644
index 00000000000..e08efccf9cb
--- /dev/null
+++ b/src/devices/bus/msx/slot/sony08.cpp
@@ -0,0 +1,90 @@
+// license:BSD-3-Clause
+// copyright-holders:Wilbert Pol
+/*
+
+ Emulation of the firmware mapper as found in Sony HB-F1XDJ and HB-F1XV machines.
+
+*/
+
+#include "emu.h"
+#include "sony08.h"
+
+
+DEFINE_DEVICE_TYPE(MSX_SLOT_SONY08, msx_slot_sony08_device, "msx_slot_sony08", "MSX Internal SONY08")
+
+
+msx_slot_sony08_device::msx_slot_sony08_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+ : device_t(mconfig, MSX_SLOT_SONY08, tag, owner, clock)
+ , msx_internal_slot_interface(mconfig, *this)
+ , m_nvram(*this, "nvram")
+ , m_rom_region(*this, finder_base::DUMMY_TAG)
+ , m_rombank(*this, "rombank%u", 0U)
+ , m_view0(*this, "view0")
+ , m_view1(*this, "view1")
+ , m_region_offset(0)
+{
+}
+
+
+void msx_slot_sony08_device::device_add_mconfig(machine_config &config)
+{
+ NVRAM(config, m_nvram, nvram_device::DEFAULT_ALL_0);
+}
+
+void msx_slot_sony08_device::device_start()
+{
+ // Sanity checks
+ if (m_rom_region->bytes() < m_region_offset + 0x100000)
+ {
+ fatalerror("Memory region '%s' is too small for the SONY08 firmware\n", m_rom_region.finder_tag());
+ }
+
+ m_sram.resize(SRAM_SIZE);
+ m_nvram->set_base(m_sram.data(), SRAM_SIZE);
+
+ for (int i = 0; i < 4; i++)
+ m_rombank[i]->configure_entries(0, 0x80, m_rom_region->base() + m_region_offset, 0x2000);
+ m_rombank[4]->configure_entries(0, 0x100, m_rom_region->base() + m_region_offset + 0x80000, 0x800);
+ m_rombank[5]->configure_entries(0, 0x100, m_rom_region->base() + m_region_offset + 0x80000, 0x800);
+
+ page(0)->install_view(0x0000, 0x3fff, m_view0);
+ m_view0[0];
+ m_view0[1].install_ram(0x0000, 0x3fff, m_sram.data());
+
+ page(1)->install_read_bank(0x4000, 0x5fff, m_rombank[0]);
+ page(1)->install_write_handler(0x4fff, 0x4fff, emu::rw_delegate(*this, FUNC(msx_slot_sony08_device::bank_w<0>)));
+ page(1)->install_view(0x6000, 0x7fff, m_view1);
+ m_view1[0].install_read_bank(0x6000, 0x7fff, m_rombank[1]);
+ m_view1[1].install_read_bank(0x6000, 0x6fff, m_rombank[1]);
+ m_view1[1].install_read_bank(0x7000, 0x77ff, m_rombank[4]);
+ m_view1[1].install_read_bank(0x7800, 0x7fff, m_rombank[5]);
+ page(1)->install_write_handler(0x6fff, 0x6fff, emu::rw_delegate(*this, FUNC(msx_slot_sony08_device::bank_w<1>)));
+ page(1)->install_write_handler(0x77ff, 0x77ff, emu::rw_delegate(*this, FUNC(msx_slot_sony08_device::bank_w<4>)));
+ page(1)->install_write_handler(0x7fff, 0x7fff, emu::rw_delegate(*this, FUNC(msx_slot_sony08_device::bank_w<5>)));
+ page(2)->install_read_bank(0x8000, 0x9fff, m_rombank[2]);
+ page(2)->install_write_handler(0x8fff, 0x8fff, emu::rw_delegate(*this, FUNC(msx_slot_sony08_device::bank_w<2>)));
+ page(2)->install_read_bank(0xa000, 0xbfff, m_rombank[3]);
+ page(2)->install_write_handler(0xafff, 0xafff, emu::rw_delegate(*this, FUNC(msx_slot_sony08_device::bank_w<3>)));
+}
+
+void msx_slot_sony08_device::device_reset()
+{
+ m_view0.select(0);
+ m_view1.select(0);
+ for (int i = 0; i < 6; i++)
+ m_rombank[i]->set_entry(0);
+}
+
+template <int Bank>
+void msx_slot_sony08_device::bank_w(u8 data)
+{
+ if (Bank >= 4)
+ m_rombank[Bank]->set_entry(data);
+ else
+ m_rombank[Bank]->set_entry(data & 0x7f);
+
+ if (Bank == 0)
+ m_view0.select(BIT(data, 7) ? 1 : 0);
+ if (Bank == 1)
+ m_view1.select(BIT(data, 7) ? 1 : 0);
+}