diff options
Diffstat (limited to 'src/devices/bus/ekara/rom.cpp')
-rw-r--r-- | src/devices/bus/ekara/rom.cpp | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/src/devices/bus/ekara/rom.cpp b/src/devices/bus/ekara/rom.cpp new file mode 100644 index 00000000000..7ba557b0917 --- /dev/null +++ b/src/devices/bus/ekara/rom.cpp @@ -0,0 +1,126 @@ +// license:BSD-3-Clause +// copyright-holders:David Haywood + +#include "emu.h" +#include "rom.h" + +//------------------------------------------------- +// ekara_rom_device - constructor +//------------------------------------------------- + +DEFINE_DEVICE_TYPE(EKARA_ROM_PLAIN, ekara_rom_plain_device, "ekara_rom_plain", "EKARA Cartridge") +DEFINE_DEVICE_TYPE(EKARA_ROM_I2C_BASE, ekara_rom_i2c_base_device, "ekara_rom_i2c_base", "EKARA Cartridge with I2C") +DEFINE_DEVICE_TYPE(EKARA_ROM_I2C_24LC04, ekara_rom_i2c_24lc04_device, "ekara_rom_i2c_24lc04", "EKARA Cartridge with I2C 24LC04") +DEFINE_DEVICE_TYPE(EKARA_ROM_I2C_24LC02, ekara_rom_i2c_24lc02_device, "ekara_rom_i2c_24lc02", "EKARA Cartridge with I2C 24LC02") + + +ekara_rom_plain_device::ekara_rom_plain_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_ekara_cart_interface(mconfig, *this) +{ +} + +ekara_rom_plain_device::ekara_rom_plain_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : + ekara_rom_plain_device(mconfig, EKARA_ROM_PLAIN, tag, owner, clock) +{ +} + +ekara_rom_i2c_base_device::ekara_rom_i2c_base_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : + ekara_rom_plain_device(mconfig, EKARA_ROM_I2C_BASE, tag, owner, clock), + m_i2cmem(*this, "i2cmem") +{ +} + +ekara_rom_i2c_base_device::ekara_rom_i2c_base_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) : + ekara_rom_plain_device(mconfig, type, tag, owner, clock), + m_i2cmem(*this, "i2cmem") +{ +} + + +ekara_rom_i2c_24lc04_device::ekara_rom_i2c_24lc04_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : + ekara_rom_i2c_base_device(mconfig, EKARA_ROM_I2C_24LC04, tag, owner, clock) +{ +} + +ekara_rom_i2c_24lc02_device::ekara_rom_i2c_24lc02_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : + ekara_rom_i2c_base_device(mconfig, EKARA_ROM_I2C_24LC02, tag, owner, clock) +{ +} + +/*------------------------------------------------- + mapper specific handlers + -------------------------------------------------*/ + +// plain + +READ8_MEMBER(ekara_rom_plain_device::read_cart) +{ + return read_rom(space, offset, mem_mask); +} + +READ8_MEMBER(ekara_rom_plain_device::read_rom) +{ + return m_rom[offset & (m_rom_size-1)]; +} + +WRITE8_MEMBER(ekara_rom_plain_device::write_cart) +{ + write_rom(space, offset, data, mem_mask); +} + +WRITE8_MEMBER(ekara_rom_plain_device::write_rom) +{ + logerror("ekara_rom_plain_device::write_rom %08x %02x\n", offset, data); +} + +// i2c base + +WRITE8_MEMBER(ekara_rom_i2c_base_device::write_rom) +{ + logerror("ekara_rom_i2c_base_device::write_rom %08x %02x\n", offset, data); +} + +READ8_MEMBER(ekara_rom_i2c_base_device::read_rom) +{ + return m_rom[offset & (m_rom_size - 1)]; +} + +READ8_MEMBER(ekara_rom_i2c_base_device::read_extra) +{ + logerror("ekara_rom_i2c_base_device::read_extra %08x\n", offset); + + return (m_i2cmem->read_sda() & 1) ? 0xff : 0x00; +} + +WRITE8_MEMBER(ekara_rom_i2c_base_device::write_extra) +{ + logerror("ekara_rom_i2c_base_device::write_extra %08x %02x\n", offset, data); + + m_i2cmem->write_sda((data & 0x01) >> 0); + m_i2cmem->write_scl((data & 0x02) >> 1); +} + + +// i2c 24lc04 + +MACHINE_CONFIG_START(ekara_rom_i2c_24lc04_device::device_add_mconfig) + I2CMEM(config, "i2cmem", 0)/*.set_page_size(16)*/.set_data_size(0x200); // 24LC04 +MACHINE_CONFIG_END + +// i2c 24lc02 + +MACHINE_CONFIG_START(ekara_rom_i2c_24lc02_device::device_add_mconfig) + I2CMEM(config, "i2cmem", 0)/*.set_page_size(16)*/.set_data_size(0x100); // 24LC02 +MACHINE_CONFIG_END + + +/*------------------------------------------------- + slot interface + -------------------------------------------------*/ + +void ekara_cart(device_slot_interface &device) +{ + device.option_add_internal("plain", EKARA_ROM_PLAIN); + device.option_add_internal("rom_24lc04", EKARA_ROM_I2C_24LC04); + device.option_add_internal("rom_24lc02", EKARA_ROM_I2C_24LC02); +} |