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path: root/src/devices/bus/msx/cart/ascii.cpp
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Diffstat (limited to 'src/devices/bus/msx/cart/ascii.cpp')
-rw-r--r--src/devices/bus/msx/cart/ascii.cpp366
1 files changed, 366 insertions, 0 deletions
diff --git a/src/devices/bus/msx/cart/ascii.cpp b/src/devices/bus/msx/cart/ascii.cpp
new file mode 100644
index 00000000000..9beb17197fc
--- /dev/null
+++ b/src/devices/bus/msx/cart/ascii.cpp
@@ -0,0 +1,366 @@
+// license:BSD-3-Clause
+// copyright-holders:Wilbert Pol
+#include "emu.h"
+#include "ascii.h"
+
+namespace {
+
+class msx_cart_ascii8_device : public device_t, public msx_cart_interface
+{
+public:
+ msx_cart_ascii8_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+ : device_t(mconfig, MSX_CART_ASCII8, tag, owner, clock)
+ , msx_cart_interface(mconfig, *this)
+ , m_rombank(*this, "rombank%u", 0U)
+ , m_bank_mask(0)
+ { }
+
+ virtual std::error_condition initialize_cartridge(std::string &message) override;
+
+protected:
+ // device_t implementation
+ virtual void device_start() override { }
+ virtual void device_reset() override ATTR_COLD;
+
+private:
+ static constexpr size_t BANK_SIZE = 0x2000;
+
+ template <int Bank> void bank_w(u8 data);
+
+ memory_bank_array_creator<4> m_rombank;
+ u8 m_bank_mask;
+};
+
+void msx_cart_ascii8_device::device_reset()
+{
+ for (int i = 0; i < 4; i++)
+ m_rombank[i]->set_entry(0);
+}
+
+std::error_condition msx_cart_ascii8_device::initialize_cartridge(std::string &message)
+{
+ if (!cart_rom_region())
+ {
+ message = "msx_cart_ascii8_device: Required region 'rom' was not found.";
+ return image_error::INTERNAL;
+ }
+
+ const u32 size = cart_rom_region()->bytes();
+ const u16 banks = size / BANK_SIZE;
+
+ if (size > 256 * BANK_SIZE || size != banks * BANK_SIZE || (~(banks - 1) % banks))
+ {
+ message = "msx_cart_ascii8_device: Region 'rom' has unsupported size.";
+ return image_error::INVALIDLENGTH;
+ }
+
+ m_bank_mask = banks - 1;
+
+ for (int i = 0; i < 4; i++)
+ m_rombank[i]->configure_entries(0, banks, cart_rom_region()->base(), BANK_SIZE);
+
+ page(1)->install_read_bank(0x4000, 0x5fff, m_rombank[0]);
+ page(1)->install_read_bank(0x6000, 0x7fff, m_rombank[1]);
+ page(1)->install_write_handler(0x6000, 0x67ff, emu::rw_delegate(*this, FUNC(msx_cart_ascii8_device::bank_w<0>)));
+ page(1)->install_write_handler(0x6800, 0x6fff, emu::rw_delegate(*this, FUNC(msx_cart_ascii8_device::bank_w<1>)));
+ page(1)->install_write_handler(0x7000, 0x77ff, emu::rw_delegate(*this, FUNC(msx_cart_ascii8_device::bank_w<2>)));
+ page(1)->install_write_handler(0x7800, 0x7fff, emu::rw_delegate(*this, FUNC(msx_cart_ascii8_device::bank_w<3>)));
+ page(2)->install_read_bank(0x8000, 0x9fff, m_rombank[2]);
+ page(2)->install_read_bank(0xa000, 0xbfff, m_rombank[3]);
+
+ return std::error_condition();
+}
+
+template <int Bank>
+void msx_cart_ascii8_device::bank_w(u8 data)
+{
+ m_rombank[Bank]->set_entry(data & m_bank_mask);
+}
+
+
+
+class msx_cart_ascii16_device : public device_t, public msx_cart_interface
+{
+public:
+ msx_cart_ascii16_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+ : device_t(mconfig, MSX_CART_ASCII16, tag, owner, clock)
+ , msx_cart_interface(mconfig, *this)
+ , m_rombank(*this, "rombank%u", 0U)
+ , m_bank_mask(0)
+ { }
+
+ virtual std::error_condition initialize_cartridge(std::string &message) override;
+
+protected:
+ // device_t implementation
+ virtual void device_start() override { }
+ virtual void device_reset() override ATTR_COLD;
+
+private:
+ static constexpr size_t BANK_SIZE = 0x4000;
+
+ template <int Bank> void bank_w(u8 data);
+
+ memory_bank_array_creator<2> m_rombank;
+ u8 m_bank_mask;
+};
+
+void msx_cart_ascii16_device::device_reset()
+{
+ m_rombank[0]->set_entry(0);
+ m_rombank[1]->set_entry(0);
+}
+
+std::error_condition msx_cart_ascii16_device::initialize_cartridge(std::string &message)
+{
+ if (!cart_rom_region())
+ {
+ message = "msx_cart_ascii16_device: Required region 'rom' was not found.";
+ return image_error::INTERNAL;
+ }
+
+ const u32 size = cart_rom_region()->bytes();
+ const u16 banks = size / BANK_SIZE;
+
+ if (size > 256 * BANK_SIZE || size != banks * BANK_SIZE || (~(banks - 1) % banks))
+ {
+ message = "msx_cart_ascii16_device: Region 'rom' has unsupported size.";
+ return image_error::INVALIDLENGTH;
+ }
+
+ m_bank_mask = banks - 1;
+
+ for (int i = 0; i < 2; i++)
+ m_rombank[i]->configure_entries(0, banks, cart_rom_region()->base(), BANK_SIZE);
+
+ page(1)->install_read_bank(0x4000, 0x7fff, m_rombank[0]);
+ page(1)->install_write_handler(0x6000, 0x67ff, emu::rw_delegate(*this, FUNC(msx_cart_ascii16_device::bank_w<0>)));
+ page(1)->install_write_handler(0x7000, 0x77ff, emu::rw_delegate(*this, FUNC(msx_cart_ascii16_device::bank_w<1>)));
+ page(2)->install_read_bank(0x8000, 0xbfff, m_rombank[1]);
+
+ return std::error_condition();
+}
+
+template <int Bank>
+void msx_cart_ascii16_device::bank_w(u8 data)
+{
+ m_rombank[Bank]->set_entry(data & m_bank_mask);
+}
+
+
+
+
+
+class msx_cart_ascii8_sram_device : public device_t, public msx_cart_interface
+{
+public:
+ msx_cart_ascii8_sram_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+ : device_t(mconfig, MSX_CART_ASCII8_SRAM, tag, owner, clock)
+ , msx_cart_interface(mconfig, *this)
+ , m_rombank(*this, "rombank%u", 0U)
+ , m_view{ {*this, "view2"}, {*this, "view3"} }
+ , m_bank_mask(0)
+ , m_sram_select_mask(0)
+ { }
+
+ virtual std::error_condition initialize_cartridge(std::string &message) override;
+
+protected:
+ // device_t implementation
+ virtual void device_start() override { }
+ virtual void device_reset() override ATTR_COLD;
+
+private:
+ static constexpr size_t BANK_SIZE = 0x2000;
+
+ void mapper_write(offs_t offset, u8 data);
+
+ memory_bank_array_creator<4> m_rombank;
+ memory_view m_view[2];
+ u8 m_bank_mask;
+ u8 m_sram_select_mask;
+};
+
+void msx_cart_ascii8_sram_device::device_reset()
+{
+ for (int i = 0; i < 4; i++)
+ m_rombank[i]->set_entry(0);
+ m_view[0].select(0);
+ m_view[1].select(0);
+}
+
+std::error_condition msx_cart_ascii8_sram_device::initialize_cartridge(std::string &message)
+{
+ if (!cart_rom_region())
+ {
+ message = "msx_cart_ascii8_sram_device: Required region 'rom' was not found.";
+ return image_error::INTERNAL;
+ }
+
+ if (!cart_sram_region())
+ {
+ message = "msx_cart_ascii8_sram_device: Required region 'sram' was not found.";
+ return image_error::INTERNAL;
+ }
+
+ const u32 size = cart_rom_region()->bytes();
+ const u16 banks = size / BANK_SIZE;
+
+ if (size > 128 * BANK_SIZE || size != banks * BANK_SIZE || (~(banks - 1) % banks))
+ {
+ message = "msx_cart_ascii8_sram_device: Region 'rom' has unsupported size.";
+ return image_error::INVALIDLENGTH;
+ }
+
+ if (cart_sram_region()->bytes() < 0x2000)
+ {
+ message = "msx_cart_ascii8_sram_device: Region 'sram' has unsupported size.";
+ return image_error::BADSOFTWARE;
+ }
+
+ m_bank_mask = banks - 1;
+ m_sram_select_mask = banks;
+
+ for (int i = 0; i < 4; i++)
+ m_rombank[i]->configure_entries(0, banks, cart_rom_region()->base(), BANK_SIZE);
+
+ page(1)->install_read_bank(0x4000, 0x5fff, m_rombank[0]);
+ page(1)->install_read_bank(0x6000, 0x7fff, m_rombank[1]);
+ page(1)->install_write_handler(0x6000, 0x7fff, emu::rw_delegate(*this, FUNC(msx_cart_ascii8_sram_device::mapper_write)));
+ page(2)->install_view(0x8000, 0x9fff, m_view[0]);
+ m_view[0][0].install_read_bank(0x8000, 0x9fff, m_rombank[2]);
+ m_view[0][1].install_ram(0x8000, 0x9fff, cart_sram_region()->base());
+ page(2)->install_view(0xa000, 0xbfff, m_view[1]);
+ m_view[1][0].install_read_bank(0xa000, 0xbfff, m_rombank[3]);
+ m_view[1][1].install_ram(0xa000, 0xbfff, cart_sram_region()->base());
+
+ return std::error_condition();
+}
+
+void msx_cart_ascii8_sram_device::mapper_write(offs_t offset, u8 data)
+{
+ u8 bank = (offset / 0x800) & 0x03;
+ if (data & m_sram_select_mask)
+ {
+ if (BIT(bank, 1))
+ m_view[BIT(bank, 0)].select(1);
+ }
+ else
+ {
+ if (BIT(bank, 1))
+ m_view[BIT(bank, 0)].select(0);
+
+ m_rombank[bank]->set_entry(data & m_bank_mask);
+ }
+}
+
+
+
+
+class msx_cart_ascii16_sram_device : public device_t, public msx_cart_interface
+{
+public:
+ msx_cart_ascii16_sram_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, MSX_CART_ASCII16_SRAM, tag, owner, clock)
+ , msx_cart_interface(mconfig, *this)
+ , m_rombank(*this, "rombank%u", 0U)
+ , m_view(*this, "view")
+ , m_bank_mask(0)
+ , m_sram_select_mask(0)
+ { }
+
+ virtual std::error_condition initialize_cartridge(std::string &message) override;
+
+protected:
+ // device_t implementation
+ virtual void device_start() override { }
+ virtual void device_reset() override ATTR_COLD;
+
+private:
+ static constexpr size_t BANK_SIZE = 0x4000;
+
+ void mapper_write_6000(u8 data);
+ void mapper_write_7000(u8 data);
+
+ memory_bank_array_creator<2> m_rombank;
+ memory_view m_view;
+ u8 m_bank_mask;
+ u8 m_sram_select_mask;
+};
+
+void msx_cart_ascii16_sram_device::device_reset()
+{
+ m_rombank[0]->set_entry(0);
+ m_view.select(0);
+ m_rombank[1]->set_entry(0);
+}
+
+std::error_condition msx_cart_ascii16_sram_device::initialize_cartridge(std::string &message)
+{
+ if (!cart_rom_region())
+ {
+ message = "msx_cart_ascii16_sram_device: Required region 'rom' was not found.";
+ return image_error::INTERNAL;
+ }
+
+ if (!cart_sram_region())
+ {
+ message = "msx_cart_ascii16_sram_device: Required region 'sram' was not found.";
+ return image_error::INTERNAL;
+ }
+
+ const u32 size = cart_rom_region()->bytes();
+ const u16 banks = size / BANK_SIZE;
+
+ if (size > 128 * BANK_SIZE || size != banks * BANK_SIZE || (~(banks - 1) % banks))
+ {
+ message = "msx_cart_ascii16_sram_device: Region 'rom' has unsupported size.";
+ return image_error::INVALIDLENGTH;
+ }
+
+ if (cart_sram_region()->bytes() < 0x800)
+ {
+ message = "msx_cart_ascii16_sram_device: Region 'sram' has unsupported size.";
+ return image_error::BADSOFTWARE;
+ }
+
+ m_bank_mask = banks - 1;
+ m_sram_select_mask = banks;
+
+ for (int i = 0; i < 2; i++)
+ m_rombank[i]->configure_entries(0, banks, cart_rom_region()->base(), BANK_SIZE);
+
+ page(1)->install_read_bank(0x4000, 0x7fff, m_rombank[0]);
+ page(1)->install_write_handler(0x6000, 0x67ff, emu::rw_delegate(*this, FUNC(msx_cart_ascii16_sram_device::mapper_write_6000)));
+ page(1)->install_write_handler(0x7000, 0x77ff, emu::rw_delegate(*this, FUNC(msx_cart_ascii16_sram_device::mapper_write_7000)));
+ page(2)->install_view(0x8000, 0xbfff, m_view);
+ m_view[0].install_read_bank(0x8000, 0xbfff, m_rombank[1]);
+ m_view[1].install_ram(0x8000, 0x87ff, 0x3800, cart_sram_region()->base());
+
+ return std::error_condition();
+}
+
+void msx_cart_ascii16_sram_device::mapper_write_6000(u8 data)
+{
+ m_rombank[0]->set_entry(data & m_bank_mask);
+}
+
+void msx_cart_ascii16_sram_device::mapper_write_7000(u8 data)
+{
+ if (data & m_sram_select_mask)
+ {
+ m_view.select(1);
+ }
+ else
+ {
+ m_view.select(0);
+ m_rombank[1]->set_entry(data & m_bank_mask);
+ }
+}
+
+} // anonymous namespace
+
+DEFINE_DEVICE_TYPE_PRIVATE(MSX_CART_ASCII8, msx_cart_interface, msx_cart_ascii8_device, "msx_cart_ascii8", "MSX Cartridge - ASCII8")
+DEFINE_DEVICE_TYPE_PRIVATE(MSX_CART_ASCII16, msx_cart_interface, msx_cart_ascii16_device, "msx_cart_ascii16", "MSX Cartridge - ASCII16")
+DEFINE_DEVICE_TYPE_PRIVATE(MSX_CART_ASCII8_SRAM, msx_cart_interface, msx_cart_ascii8_sram_device, "msx_cart_ascii8_sram", "MSX Cartridge - ASCII8 w/SRAM")
+DEFINE_DEVICE_TYPE_PRIVATE(MSX_CART_ASCII16_SRAM, msx_cart_interface, msx_cart_ascii16_sram_device, "msx_cart_ascii16_sram", "MSX Cartridge - ASCII16 w/SRAM")