diff options
Diffstat (limited to 'src/devices/bus/rc2014/romram.cpp')
-rw-r--r-- | src/devices/bus/rc2014/romram.cpp | 130 |
1 files changed, 80 insertions, 50 deletions
diff --git a/src/devices/bus/rc2014/romram.cpp b/src/devices/bus/rc2014/romram.cpp index 6b5c9b7bc66..bc7d0713e2e 100644 --- a/src/devices/bus/rc2014/romram.cpp +++ b/src/devices/bus/rc2014/romram.cpp @@ -8,6 +8,7 @@ #include "emu.h" #include "romram.h" +#include "machine/intelfsh.h" namespace { @@ -25,19 +26,21 @@ public: protected: // device-level overrides virtual void device_start() override; - virtual void device_post_load() override { update_banks(); } + virtual void device_reset() override; + virtual void device_add_mconfig(machine_config &config) override; virtual const tiny_rom_entry *device_rom_region() const override; - void page_w(offs_t offset, uint8_t data) { m_page_reg[offset & 3] = data & 0x3f; update_banks(); } - void page_en_w(offs_t, uint8_t data) { m_page_en = data & 1; update_banks(); } + void page_w(offs_t offset, uint8_t data) { m_page_reg[offset & 3] = data & 0x3f; } + void page_en_w(offs_t, uint8_t data) { m_page_en = data & 1; } - void update_banks(); private: + template<uint8_t Bank> void mem_w(offs_t offset, uint8_t data); + template<uint8_t Bank> uint8_t mem_r(offs_t offset); + uint8_t m_page_reg[4]; uint8_t m_page_en; std::unique_ptr<u8[]> m_ram; - required_memory_region m_romram; - memory_bank_array_creator<4> m_bank; + required_device<sst_39sf040_device> m_flash; }; rom_ram_512k_device::rom_ram_512k_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) @@ -46,8 +49,7 @@ rom_ram_512k_device::rom_ram_512k_device(const machine_config &mconfig, const ch , m_page_reg{0,0,0,0} , m_page_en(0) , m_ram(nullptr) - , m_romram(*this, "romram") - , m_bank(*this, "bank%u", 0U) + , m_flash(*this, "flash") { } @@ -59,64 +61,92 @@ void rom_ram_512k_device::device_start() save_item(NAME(m_page_en)); save_item(NAME(m_page_reg)); - // A3 not connected - m_bus->installer(AS_IO)->install_write_handler(0x70, 0x73, 0, 0x08, 0, write8sm_delegate(*this, FUNC(rom_ram_512k_device::page_w))); - // A3, A1 and A0 not connected - m_bus->installer(AS_IO)->install_write_handler(0x74, 0x74, 0, 0x0b, 0, write8sm_delegate(*this, FUNC(rom_ram_512k_device::page_en_w))); + m_bus->installer(AS_PROGRAM)->install_readwrite_handler(0x0000, 0x3fff, 0, 0, 0, read8sm_delegate(*this, FUNC(rom_ram_512k_device::mem_r<0>)), write8sm_delegate(*this, FUNC(rom_ram_512k_device::mem_w<0>))); + m_bus->installer(AS_PROGRAM)->install_readwrite_handler(0x4000, 0x7fff, 0, 0, 0, read8sm_delegate(*this, FUNC(rom_ram_512k_device::mem_r<1>)), write8sm_delegate(*this, FUNC(rom_ram_512k_device::mem_w<1>))); + m_bus->installer(AS_PROGRAM)->install_readwrite_handler(0x8000, 0xbfff, 0, 0, 0, read8sm_delegate(*this, FUNC(rom_ram_512k_device::mem_r<2>)), write8sm_delegate(*this, FUNC(rom_ram_512k_device::mem_w<2>))); + m_bus->installer(AS_PROGRAM)->install_readwrite_handler(0xc000, 0xffff, 0, 0, 0, read8sm_delegate(*this, FUNC(rom_ram_512k_device::mem_r<3>)), write8sm_delegate(*this, FUNC(rom_ram_512k_device::mem_w<3>))); +} - m_bus->installer(AS_PROGRAM)->install_read_bank(0x0000, 0x3fff, m_bank[0]); - m_bus->installer(AS_PROGRAM)->install_read_bank(0x4000, 0x7fff, m_bank[1]); - m_bus->installer(AS_PROGRAM)->install_read_bank(0x8000, 0xbfff, m_bank[2]); - m_bus->installer(AS_PROGRAM)->install_read_bank(0xc000, 0xffff, m_bank[3]); +void rom_ram_512k_device::device_reset() +{ + m_page_en = 0; + m_page_reg[0] = 0; + m_page_reg[1] = 0; + m_page_reg[2] = 0; + m_page_reg[3] = 0; + + // A15-A8 and A3 not connected + m_bus->installer(AS_IO)->install_write_handler(0x70, 0x73, 0, 0xff08, 0, write8sm_delegate(*this, FUNC(rom_ram_512k_device::page_w))); + // A15-A8, A3, A1 and A0 not connected + m_bus->installer(AS_IO)->install_write_handler(0x74, 0x74, 0, 0xff0b, 0, write8sm_delegate(*this, FUNC(rom_ram_512k_device::page_en_w))); +} - update_banks(); +void rom_ram_512k_device::device_add_mconfig(machine_config &config) +{ + SST_39SF040(config, m_flash); } -void rom_ram_512k_device::update_banks() +template<uint8_t Bank> +void rom_ram_512k_device::mem_w(offs_t offset, uint8_t data) { if (m_page_en) { - if (m_page_reg[0] & 0x20) { - m_bank[0]->set_base(m_ram.get() + ((m_page_reg[0] & 0x1f) << 14)); - m_bus->installer(AS_PROGRAM)->install_write_bank(0x0000, 0x3fff, m_bank[0]); + if (m_page_reg[Bank] & 0x20) { + m_ram[offset + ((m_page_reg[Bank] & 0x1f) << 14)] = data; } else { - m_bank[0]->set_base(m_romram->base() + (m_page_reg[0] << 14)); - m_bus->installer(AS_PROGRAM)->unmap_write(0x0000, 0x3fff); - } - if (m_page_reg[1] & 0x20) { - m_bank[1]->set_base(m_ram.get() + ((m_page_reg[1] & 0x1f) << 14)); - m_bus->installer(AS_PROGRAM)->install_write_bank(0x4000, 0x7fff, m_bank[1]); - } else { - m_bank[1]->set_base(m_romram->base() + (m_page_reg[1] << 14)); - m_bus->installer(AS_PROGRAM)->unmap_write(0x4000, 0x7fff); - } - if (m_page_reg[2] & 0x20) { - m_bank[2]->set_base(m_ram.get() + ((m_page_reg[2] & 0x1f) << 14)); - m_bus->installer(AS_PROGRAM)->install_write_bank(0x8000, 0xbfff, m_bank[2]); - } else { - m_bank[2]->set_base(m_romram->base() + (m_page_reg[2] << 14)); - m_bus->installer(AS_PROGRAM)->unmap_write(0x8000, 0xbfff); - } - if (m_page_reg[3] & 0x20) { - m_bank[3]->set_base(m_ram.get() + ((m_page_reg[3] & 0x1f) << 14)); - m_bus->installer(AS_PROGRAM)->install_write_bank(0xc000, 0xffff, m_bank[3]); - } else { - m_bank[3]->set_base(m_romram->base() + (m_page_reg[3] << 14)); - m_bus->installer(AS_PROGRAM)->unmap_write(0xc000, 0xffff); + m_flash->write(offset + (m_page_reg[Bank] << 14), data); } } else { - m_bank[0]->set_base(m_romram->base() + 0x0000); - m_bank[1]->set_base(m_romram->base() + 0x4000); - m_bank[2]->set_base(m_romram->base() + 0x8000); - m_bank[3]->set_base(m_romram->base() + 0xc000); + m_flash->write(offset + (Bank << 14), data); + } +} + +template<uint8_t Bank> +uint8_t rom_ram_512k_device::mem_r(offs_t offset) +{ + if (m_page_en) + { + if ((offset>>14 == 0) && (m_page_reg[Bank] & 0x20)) { + return m_ram[offset + ((m_page_reg[Bank] & 0x1f) << 14)]; + } else { + return m_flash->read(offset + (m_page_reg[Bank] << 14)); + } } + return m_flash->read(offset + (Bank << 14)); } ROM_START(rc2014_rom_ram_512k) - ROM_REGION( 0x80000, "romram", 0) - ROM_LOAD( "rc_2.512k.rom", 0x00000, 0x80000, CRC(c3aefb4e) SHA1(34541851dc781033b00cdfbe445e1d91811da5c2) ) + ROM_REGION( 0x80000, "flash", 0) + ROM_DEFAULT_BIOS("3.0.1") + // Official ROMs distributed with kit + ROM_SYSTEM_BIOS(0, "1.512k", "RomWBW RC_Std.ROM 2.9.1-pre5") + ROMX_LOAD( "rc_1.512k.rom", 0x00000, 0x80000, CRC(f360d908) SHA1(e9c0c79f873eecff9184836025c13915630274c5), ROM_BIOS(0)) + ROM_SYSTEM_BIOS(1, "2.512k", "RomWBW RC_Std.ROM 2.9.1-pre5 With PPIDE") + ROMX_LOAD( "rc_2.512k.rom", 0x00000, 0x80000, CRC(c3aefb4e) SHA1(34541851dc781033b00cdfbe445e1d91811da5c2), ROM_BIOS(1)) + ROM_SYSTEM_BIOS(2, "3.512k", "RomWBW RC_Std.ROM 2.9.1-pre5 With RTC") + ROMX_LOAD( "rc_3.512k.rom", 0x00000, 0x80000, CRC(749f7973) SHA1(2b78bb5ad0595b63c95dc58d48c5144320237362), ROM_BIOS(2)) + ROM_SYSTEM_BIOS(3, "4.512k", "RomWBW RC_Std.ROM 2.9.1-pre5 With PPIDE and RTC") + ROMX_LOAD( "rc_4.512k.rom", 0x00000, 0x80000, CRC(fbe44292) SHA1(ae0407f0a605e9b1262ce00acf393c30fd87d1e4), ROM_BIOS(3)) + ROM_SYSTEM_BIOS(4, "5.512k", "RomWBW RC_Std.ROM 2.9.1-pre5 With WDC Floppy") + ROMX_LOAD( "rc_5.512k.rom", 0x00000, 0x80000, CRC(4e1d00dd) SHA1(57b21ce416a0a23e034c2efdb54f669f4b110878), ROM_BIOS(4)) + ROM_SYSTEM_BIOS(5, "6.512k", "RomWBW RC_Std.ROM 2.9.1-pre5 With WDC Floppy and PPIDE") + ROMX_LOAD( "rc_6.512k.rom", 0x00000, 0x80000, CRC(f2f1535e) SHA1(9121ca4246c520169cca47fda07143de8e903b3e), ROM_BIOS(5)) + ROM_SYSTEM_BIOS(6, "7.512k", "RomWBW RC_Std.ROM 2.9.1-pre5 With WDC Floppy and RTC") + ROMX_LOAD( "rc_7.512k.rom", 0x00000, 0x80000, CRC(57efe210) SHA1(b9ee93215d69c185d5af511a1105ee06e6474ff2), ROM_BIOS(6)) + ROM_SYSTEM_BIOS(7, "8.512k", "RomWBW RC_Std.ROM 2.9.1-pre5 With WDC Floppy, PPIDE and RTC") + ROMX_LOAD( "rc_8.512k.rom", 0x00000, 0x80000, CRC(38cc2dfc) SHA1(6e740224276b9d0ae32bb28095c8a8ccb47c38b5), ROM_BIOS(7)) + // Official distribution of ROMWBW + // Taken from https://github.com/wwarthen/RomWBW/releases + ROM_SYSTEM_BIOS(8, "2.9.0", "Official RomWBW 2.9.0") + ROMX_LOAD( "rc_std_2_9_0.rom", 0x00000, 0x80000, CRC(2045d238) SHA1(dd37c945fd531192b368d80b20b0154e6b2d2a75), ROM_BIOS(8)) + ROM_SYSTEM_BIOS(9, "2.9.1", "Official RomWBW 2.9.1") + ROMX_LOAD( "rcz80_std_2_9_1.rom", 0x00000, 0x80000, CRC(f7c52c5f) SHA1(86a0dbbecfea118cf66f9f35a21f138ce64ae788), ROM_BIOS(9)) + ROM_SYSTEM_BIOS(10, "3.0.0", "Official RomWBW 3.0.0") + ROMX_LOAD( "rcz80_std_3_0_0.rom", 0x00000, 0x80000, CRC(15b802f8) SHA1(0941c6b00ccdca460d64d16fb374c0380dd431ad), ROM_BIOS(10)) + ROM_SYSTEM_BIOS(11, "3.0.1", "Official RomWBW 3.0.1") + ROMX_LOAD( "rcz80_std_3_0_1.rom", 0x00000, 0x80000, CRC(6d6b60c5) SHA1(5c642cb3113bc0a51562dc92c8b46bde414adb6c), ROM_BIOS(11)) ROM_END const tiny_rom_entry *rom_ram_512k_device::device_rom_region() const |