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Diffstat (limited to 'src/emu/bus/msx_cart/ascii.c')
-rw-r--r--src/emu/bus/msx_cart/ascii.c442
1 files changed, 442 insertions, 0 deletions
diff --git a/src/emu/bus/msx_cart/ascii.c b/src/emu/bus/msx_cart/ascii.c
new file mode 100644
index 00000000000..fa8d7a51d12
--- /dev/null
+++ b/src/emu/bus/msx_cart/ascii.c
@@ -0,0 +1,442 @@
+#include "emu.h"
+#include "ascii.h"
+
+
+const device_type MSX_CART_ASCII8 = &device_creator<msx_cart_ascii8>;
+const device_type MSX_CART_ASCII16 = &device_creator<msx_cart_ascii16>;
+const device_type MSX_CART_ASCII8_SRAM = &device_creator<msx_cart_ascii8_sram>;
+const device_type MSX_CART_ASCII16_SRAM = &device_creator<msx_cart_ascii16_sram>;
+
+
+msx_cart_ascii8::msx_cart_ascii8(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, MSX_CART_ASCII8, "MSX Cartridge - ASCII8", tag, owner, clock, "msx_cart_ascii8", __FILE__)
+ , msx_cart_interface(mconfig, *this)
+ , m_bank_mask(0)
+{
+ for (int i = 0; i < 4; i++)
+ {
+ m_selected_bank[i] = 0;
+ m_bank_base[i] = NULL;
+ }
+}
+
+
+void msx_cart_ascii8::device_start()
+{
+ save_item(NAME(m_selected_bank));
+
+ machine().save().register_postload(save_prepost_delegate(FUNC(msx_cart_ascii8::restore_banks), this));
+}
+
+
+void msx_cart_ascii8::restore_banks()
+{
+ for (int i = 0; i < 4; i++)
+ {
+ m_bank_base[i] = get_rom_base() + (m_selected_bank[i] & m_bank_mask ) * 0x2000;
+ }
+}
+
+
+void msx_cart_ascii8::device_reset()
+{
+ for (int i = 0; i < 4; i++)
+ {
+ m_selected_bank[i] = 0;
+ }
+}
+
+
+void msx_cart_ascii8::initialize_cartridge()
+{
+ UINT32 size = get_rom_size();
+
+ if ( size > 256 * 0x2000 )
+ {
+ fatalerror("ascii8: ROM is too big\n");
+ }
+
+ UINT16 banks = size / 0x2000;
+
+ if (size != banks * 0x2000 || (~(banks - 1) % banks))
+ {
+ fatalerror("ascii8: Invalid ROM size\n");
+ }
+
+ m_bank_mask = banks - 1;
+
+ restore_banks();
+}
+
+
+READ8_MEMBER(msx_cart_ascii8::read_cart)
+{
+ if ( offset >= 0x4000 && offset < 0xC000 )
+ {
+ return m_bank_base[(offset - 0x4000) >> 13][offset & 0x1fff];
+ }
+ return 0xff;
+}
+
+
+WRITE8_MEMBER(msx_cart_ascii8::write_cart)
+{
+ if (offset >= 0x6000 && offset < 0x8000)
+ {
+ UINT8 bank = (offset / 0x800) & 0x03;
+
+ m_selected_bank[bank] = data;
+ m_bank_base[bank] = get_rom_base() + (m_selected_bank[bank] & m_bank_mask ) * 0x2000;
+ }
+}
+
+
+
+msx_cart_ascii16::msx_cart_ascii16(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, MSX_CART_ASCII16, "MSX Cartridge - ASCII16", tag, owner, clock, "msx_cart_ascii16", __FILE__)
+ , msx_cart_interface(mconfig, *this)
+ , m_bank_mask(0)
+{
+ for (int i = 0; i < 2; i++)
+ {
+ m_selected_bank[i] = 0;
+ m_bank_base[i] = NULL;
+ }
+}
+
+
+void msx_cart_ascii16::device_start()
+{
+ save_item(NAME(m_selected_bank));
+
+ machine().save().register_postload(save_prepost_delegate(FUNC(msx_cart_ascii16::restore_banks), this));
+}
+
+
+void msx_cart_ascii16::restore_banks()
+{
+ for (int i = 0; i < 2; i++)
+ {
+ m_bank_base[i] = get_rom_base() + (m_selected_bank[i] & m_bank_mask) * 0x4000;
+ }
+}
+
+
+void msx_cart_ascii16::device_reset()
+{
+ for (int i = 0; i < 2; i++)
+ {
+ m_selected_bank[i] = 0;
+ }
+}
+
+
+void msx_cart_ascii16::initialize_cartridge()
+{
+ UINT32 size = get_rom_size();
+
+ if ( size > 256 * 0x4000 )
+ {
+ fatalerror("ascii16: ROM is too big\n");
+ }
+
+ UINT16 banks = size / 0x4000;
+
+ if (size != banks * 0x4000 || (~(banks - 1) % banks))
+ {
+ fatalerror("ascii16: Invalid ROM size\n");
+ }
+
+ m_bank_mask = banks - 1;
+
+ restore_banks();
+}
+
+
+READ8_MEMBER(msx_cart_ascii16::read_cart)
+{
+ if ( offset >= 0x4000 && offset < 0xC000 )
+ {
+ return m_bank_base[offset >> 15][offset & 0x3fff];
+ }
+ return 0xff;
+}
+
+
+WRITE8_MEMBER(msx_cart_ascii16::write_cart)
+{
+ if (offset >= 0x6000 && offset < 0x6800)
+ {
+ m_selected_bank[0] = data;
+ m_bank_base[0] = get_rom_base() + (m_selected_bank[0] & m_bank_mask) * 0x4000;
+ }
+
+ if (offset >= 0x7000 && offset < 0x7800)
+ {
+ m_selected_bank[1] = data;
+ m_bank_base[1] = get_rom_base() + (m_selected_bank[1] & m_bank_mask) * 0x4000;
+ }
+}
+
+
+
+
+
+msx_cart_ascii8_sram::msx_cart_ascii8_sram(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, MSX_CART_ASCII8_SRAM, "MSX Cartridge - ASCII8 w/SRAM", tag, owner, clock, "msx_cart_ascii8_sram", __FILE__)
+ , msx_cart_interface(mconfig, *this)
+ , m_bank_mask(0)
+ , m_sram_select_mask(0)
+{
+ for (int i = 0; i < 4; i++)
+ {
+ m_selected_bank[i] = 0;
+ m_bank_base[i] = NULL;
+ }
+}
+
+
+void msx_cart_ascii8_sram::device_start()
+{
+ save_item(NAME(m_selected_bank));
+
+ machine().save().register_postload(save_prepost_delegate(FUNC(msx_cart_ascii8_sram::restore_banks), this));
+}
+
+
+void msx_cart_ascii8_sram::setup_bank(UINT8 bank)
+{
+ if (m_selected_bank[bank] & ~(m_sram_select_mask | m_bank_mask))
+ {
+ // Nothing is mapped
+ m_bank_base[bank] = NULL;
+ }
+ else if (m_selected_bank[bank] & m_sram_select_mask)
+ {
+ // SRAM is selected
+ m_bank_base[bank] = get_sram_base();
+ }
+ else
+ {
+ m_bank_base[bank] = get_rom_base() + (m_selected_bank[bank] & m_bank_mask ) * 0x2000;
+ }
+}
+
+
+void msx_cart_ascii8_sram::restore_banks()
+{
+ for (int i = 0; i < 4; i++)
+ {
+ setup_bank(i);
+ }
+}
+
+
+void msx_cart_ascii8_sram::device_reset()
+{
+ for (int i = 0; i < 4; i++)
+ {
+ m_selected_bank[i] = 0;
+ }
+}
+
+
+void msx_cart_ascii8_sram::initialize_cartridge()
+{
+ UINT32 size = get_rom_size();
+
+ if ( size > 128 * 0x2000 )
+ {
+ fatalerror("ascii8_sram: ROM is too big\n");
+ }
+
+ UINT16 banks = size / 0x2000;
+
+ if (size != banks * 0x2000 || (~(banks - 1) % banks))
+ {
+ fatalerror("ascii8_sram: Invalid ROM size\n");
+ }
+
+ if (get_sram_size() != 0x2000)
+ {
+ fatalerror("ascii8_sram: Unsupported SRAM size\n");
+ }
+
+ m_bank_mask = banks - 1;
+ m_sram_select_mask = banks;
+
+ restore_banks();
+}
+
+
+READ8_MEMBER(msx_cart_ascii8_sram::read_cart)
+{
+ if ( offset >= 0x4000 && offset < 0xC000 )
+ {
+ UINT8 *bank_base = m_bank_base[(offset - 0x4000) >> 13];
+
+ if (bank_base != NULL)
+ {
+ return bank_base[offset & 0x1fff];
+ }
+ }
+ return 0xff;
+}
+
+
+WRITE8_MEMBER(msx_cart_ascii8_sram::write_cart)
+{
+ if (offset >= 0x6000 && offset < 0x8000)
+ {
+ UINT8 bank = (offset / 0x800) & 0x03;
+
+ m_selected_bank[bank] = data;
+ setup_bank(bank);
+ }
+ else if (offset >= 0x8000 && offset < 0xc000)
+ {
+ UINT8 bank = (offset & 0x2000) ? 3 : 2;
+
+ if ((m_selected_bank[bank] & m_sram_select_mask) && !(m_selected_bank[bank] & ~(m_sram_select_mask | m_bank_mask)))
+ {
+ // Write to SRAM
+ m_bank_base[bank][offset & 0x1fff] = data;
+ }
+ }
+}
+
+
+
+msx_cart_ascii16_sram::msx_cart_ascii16_sram(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, MSX_CART_ASCII16_SRAM, "MSX Cartridge - ASCII16 w/SRAM", tag, owner, clock, "msx_cart_ascii16_sram", __FILE__)
+ , msx_cart_interface(mconfig, *this)
+ , m_bank_mask(0)
+ , m_sram_select_mask(0)
+{
+ for (int i = 0; i < 2; i++)
+ {
+ m_selected_bank[i] = 0;
+ m_bank_base[i] = NULL;
+ }
+}
+
+
+void msx_cart_ascii16_sram::device_start()
+{
+ save_item(NAME(m_selected_bank));
+
+ machine().save().register_postload(save_prepost_delegate(FUNC(msx_cart_ascii16_sram::restore_banks), this));
+}
+
+
+void msx_cart_ascii16_sram::setup_bank(UINT8 bank)
+{
+ if (m_selected_bank[bank] & ~(m_sram_select_mask | m_bank_mask))
+ {
+ // Nothing is mapped
+ m_bank_base[bank] = NULL;
+ }
+ else if (m_selected_bank[bank] & m_sram_select_mask)
+ {
+ // SRAM is selected
+ m_bank_base[bank] = get_sram_base();
+ }
+ else
+ {
+ m_bank_base[bank] = get_rom_base() + (m_selected_bank[bank] & m_bank_mask) * 0x4000;
+ }
+}
+
+
+void msx_cart_ascii16_sram::restore_banks()
+{
+ for (int i = 0; i < 2; i++)
+ {
+ setup_bank(i);
+ }
+}
+
+
+void msx_cart_ascii16_sram::device_reset()
+{
+ for (int i = 0; i < 2; i++)
+ {
+ m_selected_bank[i] = 0;
+ }
+}
+
+
+void msx_cart_ascii16_sram::initialize_cartridge()
+{
+ UINT32 size = get_rom_size();
+
+ if ( size > 128 * 0x4000 )
+ {
+ fatalerror("ascii16_sram: ROM is too big\n");
+ }
+
+ UINT16 banks = size / 0x4000;
+
+ if (size != banks * 0x4000 || (~(banks - 1) % banks))
+ {
+ fatalerror("ascii16_sram: Invalid ROM size\n");
+ }
+
+ if (get_sram_size() != 0x800)
+ {
+ fatalerror("ascii16_sram: Unsupported SRAM size\n");
+ }
+
+ m_bank_mask = banks - 1;
+ m_sram_select_mask = banks;
+
+ restore_banks();
+}
+
+
+READ8_MEMBER(msx_cart_ascii16_sram::read_cart)
+{
+ if ( offset >= 0x4000 && offset < 0xC000 )
+ {
+ UINT8 bank = offset >> 15;
+
+ if (m_bank_base[bank] != NULL)
+ {
+ if (m_selected_bank[bank] & m_sram_select_mask)
+ {
+ return m_bank_base[bank][offset & 0x7ff];
+ }
+ else
+ {
+ return m_bank_base[bank][offset & 0x3fff];
+ }
+ }
+ }
+ return 0xff;
+}
+
+
+WRITE8_MEMBER(msx_cart_ascii16_sram::write_cart)
+{
+ if (offset >= 0x6000 && offset < 0x6800)
+ {
+ m_selected_bank[0] = data;
+ setup_bank(0);
+ }
+
+ if (offset >= 0x7000 && offset < 0x7800)
+ {
+ m_selected_bank[1] = data;
+ setup_bank(1);
+ }
+
+ if (offset >= 0x8000 && offset < 0xc000)
+ {
+ if ((m_selected_bank[1] & m_sram_select_mask) && !(m_selected_bank[1] & ~(m_sram_select_mask | m_bank_mask)))
+ {
+ // Write to SRAM
+ m_bank_base[1][offset & 0x7ff] = data;
+ }
+ }
+}
+