// license:BSD-3-Clause // copyright-holders:Nigel Barnes /********************************************************************** Solidisk Sideways RAM http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/Solidisk_128KSWE.html **********************************************************************/ #include "emu.h" #include "stlswr.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(BBC_STLSWR16, bbc_stlswr16_device, "bbc_stlswr16", "Solidisk SWR16 - 16K Sideways RAM"); DEFINE_DEVICE_TYPE(BBC_STLSWR32, bbc_stlswr32_device, "bbc_stlswr32", "Solidisk SWR32 - 32K Sideways RAM"); DEFINE_DEVICE_TYPE(BBC_STLSWR64, bbc_stlswr64_device, "bbc_stlswr64", "Solidisk SWR64 - 64K Sideways RAM"); DEFINE_DEVICE_TYPE(BBC_STLSWR128, bbc_stlswr128_device, "bbc_stlswr128", "Solidisk SWR128 - 128K Sideways RAM"); //------------------------------------------------- // ROM( stlswr ) //------------------------------------------------- ROM_START(stlswr) ROM_REGION(0x4000, "exp_rom", 0) ROM_SYSTEM_BIOS(0, "13", "Toolkit 1.3 03/03/86") ROMX_LOAD("toolkit-1.3-16k-128k-03-03-86.rom", 0x0000, 0x4000, CRC(a1745d10) SHA1(1821e74feca60b95766ead06df20f6db22e2b4bb), ROM_BIOS(0)) ROM_END //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- void bbc_stlswr16_device::device_add_mconfig(machine_config &config) { /* TODO: romslot3 is unavailable when board is fitted */ //config.device_remove(":romslot3"); BBC_ROMSLOT16(config, m_rom[15], bbc_rom_devices, "ram").set_fixed_ram(true); } void bbc_stlswr32_device::device_add_mconfig(machine_config &config) { /* TODO: romslot3 is unavailable when board is fitted */ //config.device_remove(":romslot3"); BBC_ROMSLOT16(config, m_rom[14], bbc_rom_devices, "ram").set_fixed_ram(true); BBC_ROMSLOT16(config, m_rom[15], bbc_rom_devices, "ram").set_fixed_ram(true); } void bbc_stlswr64_device::device_add_mconfig(machine_config &config) { /* TODO: romslot3 is unavailable when board is fitted */ //config.device_remove(":romslot3"); BBC_ROMSLOT16(config, m_rom[12], bbc_rom_devices, "ram").set_fixed_ram(true); BBC_ROMSLOT16(config, m_rom[13], bbc_rom_devices, "ram").set_fixed_ram(true); BBC_ROMSLOT16(config, m_rom[14], bbc_rom_devices, "ram").set_fixed_ram(true); BBC_ROMSLOT16(config, m_rom[15], bbc_rom_devices, "ram").set_fixed_ram(true); } void bbc_stlswr128_device::device_add_mconfig(machine_config &config) { /* TODO: romslot3 is unavailable when board is fitted */ //config.device_remove(":romslot3"); BBC_ROMSLOT16(config, m_rom[8], bbc_rom_devices, "ram").set_fixed_ram(true); BBC_ROMSLOT16(config, m_rom[9], bbc_rom_devices, "ram").set_fixed_ram(true); BBC_ROMSLOT16(config, m_rom[10], bbc_rom_devices, "ram").set_fixed_ram(true); BBC_ROMSLOT16(config, m_rom[11], bbc_rom_devices, "ram").set_fixed_ram(true); BBC_ROMSLOT16(config, m_rom[12], bbc_rom_devices, "ram").set_fixed_ram(true); BBC_ROMSLOT16(config, m_rom[13], bbc_rom_devices, "ram").set_fixed_ram(true); BBC_ROMSLOT16(config, m_rom[14], bbc_rom_devices, "ram").set_fixed_ram(true); BBC_ROMSLOT16(config, m_rom[15], bbc_rom_devices, "ram").set_fixed_ram(true); } //------------------------------------------------- // rom_region - device-specific ROM region //------------------------------------------------- const tiny_rom_entry *bbc_stlswr_device::device_rom_region() const { return ROM_NAME(stlswr); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // bbc_stlswr_device - constructor //------------------------------------------------- bbc_stlswr_device::bbc_stlswr_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, const XTAL &clock) : device_t(mconfig, type, tag, owner, clock) , device_bbc_internal_interface(mconfig, *this) , m_rom(*this, "romslot%u", 0U) { } bbc_stlswr16_device::bbc_stlswr16_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) : bbc_stlswr_device(mconfig, BBC_STLSWR16, tag, owner, clock) { } bbc_stlswr32_device::bbc_stlswr32_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) : bbc_stlswr_device(mconfig, BBC_STLSWR32, tag, owner, clock) { } bbc_stlswr64_device::bbc_stlswr64_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) : bbc_stlswr_device(mconfig, BBC_STLSWR64, tag, owner, clock) { } bbc_stlswr128_device::bbc_stlswr128_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) : bbc_stlswr_device(mconfig, BBC_STLSWR128, tag, owner, clock) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void bbc_stlswr_device::device_start() { /* register for save states */ save_item(NAME(m_romsel)); save_item(NAME(m_ramsel)); } //************************************************************************** // IMPLEMENTATION //************************************************************************** uint8_t bbc_stlswr_device::paged_r(offs_t offset) { uint8_t data = 0xff; switch (m_romsel) { case 0: case 1: case 2: case 3: /* motherboard rom sockets */ if (m_mb_rom[m_romsel] && m_mb_rom[m_romsel]->present()) { data = m_mb_rom[m_romsel]->read(offset); } else { data = m_region_swr->base()[offset + (m_romsel << 14)]; } break; default: /* expansion board sockets */ if (m_rom[m_romsel] && m_rom[m_romsel]->present()) { data = m_rom[m_romsel]->read(offset); } else { data = m_region_swr->base()[offset + (m_romsel << 14)]; } break; } return data; } void bbc_stlswr_device::paged_w(offs_t offset, uint8_t data) { switch (m_romsel) { case 0: case 1: case 2: case 3: /* motherboard rom sockets */ if (m_mb_rom[m_romsel]) { m_mb_rom[m_romsel]->write(offset, data); } break; } /* expansion board sockets */ if (m_rom[m_ramsel]) { m_rom[m_ramsel]->write(offset, data); } }