diff options
Diffstat (limited to 'src/devices/bus/msx_slot/sony08.cpp')
-rw-r--r-- | src/devices/bus/msx_slot/sony08.cpp | 172 |
1 files changed, 0 insertions, 172 deletions
diff --git a/src/devices/bus/msx_slot/sony08.cpp b/src/devices/bus/msx_slot/sony08.cpp deleted file mode 100644 index 652ed134457..00000000000 --- a/src/devices/bus/msx_slot/sony08.cpp +++ /dev/null @@ -1,172 +0,0 @@ -// 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, uint32_t 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_region_offset(0) - , m_rom(nullptr) -{ - for (int i = 0; i < 8; i++) - { - m_selected_bank[i] = 0; - m_bank_base[i] = nullptr; - } - memset(m_sram, 0, sizeof(m_sram)); -} - - -void msx_slot_sony08_device::device_add_mconfig(machine_config &config) -{ - NVRAM(config, "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_rom = m_rom_region->base() + m_region_offset; - - m_nvram->set_base(m_sram, 0x4000); - - save_item(NAME(m_selected_bank)); - - restore_banks(); -} - - -void msx_slot_sony08_device::device_post_load() -{ - restore_banks(); -} - - -void msx_slot_sony08_device::map_bank(int bank) -{ - if (bank < 2) - { - return; - } - - // Special banks - if (bank == 6 || bank == 7) - { - m_bank_base[bank] = m_rom + 0x80000 + (m_selected_bank[bank] * 0x800); - return; - } - - m_bank_base[bank] = m_rom + ((m_selected_bank[bank] * 0x2000) & 0xFFFFF); - if (bank == 2) - { - if (m_selected_bank[bank] & 0x80) - { - m_bank_base[0] = m_sram; - m_bank_base[1] = m_sram + 0x2000; - } - else - { - m_bank_base[0] = nullptr; - m_bank_base[1] = nullptr; - } - } -} - - -void msx_slot_sony08_device::restore_banks() -{ - for (int i = 0; i < 8; i++) - { - map_bank(i); - } -} - - -uint8_t msx_slot_sony08_device::read(offs_t offset) -{ - if (offset >= 0xc000) - { - return 0xFF; - } - - if ((offset & 0xf000) == 0x7000 && (m_selected_bank[3] & 0x80)) - { - return m_bank_base[6 + ((offset >> 11) & 0x01)][offset & 0x7ff]; - } - - const uint8_t *mem = m_bank_base[offset >> 13]; - - if (mem) - { - return mem[offset & 0x1fff]; - } - return 0xFF; -} - - -void msx_slot_sony08_device::write(offs_t offset, uint8_t data) -{ - if (offset < 0x4000) - { - if (m_bank_base[0] != nullptr) - { - m_sram[offset & 0x3fff] = data; - return; - } - } - - switch (offset) - { - case 0x4FFF: - m_selected_bank[2] = data; - map_bank(2); - break; - - case 0x6FFF: // 6000-7FFF - m_selected_bank[3] = data; - map_bank(3); - break; - - case 0x77FF: - m_selected_bank[6] = data; - map_bank(6); - break; - - case 0x7FFF: - m_selected_bank[7] = data; - map_bank(7); - break; - - case 0x8FFF: - m_selected_bank[4] = data; - map_bank(4); - break; - - case 0xAFFF: - m_selected_bank[5] = data; - map_bank(5); - break; - - default: - logerror("Unhandled write %02x to %04x\n", data, offset); - break; - } -} |