diff options
Diffstat (limited to 'src/devices/bus/archimedes/podule/ide_rdev.cpp')
-rw-r--r-- | src/devices/bus/archimedes/podule/ide_rdev.cpp | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/src/devices/bus/archimedes/podule/ide_rdev.cpp b/src/devices/bus/archimedes/podule/ide_rdev.cpp new file mode 100644 index 00000000000..3471e5e40a0 --- /dev/null +++ b/src/devices/bus/archimedes/podule/ide_rdev.cpp @@ -0,0 +1,122 @@ +// license:BSD-3-Clause +// copyright-holders:Nigel Barnes +/********************************************************************** + + RISC Developments IDE Hard Disc System + + http://chrisacorns.computinghistory.org.uk/32bit_UpgradesH2Z/RiscDev_IDE.html + +**********************************************************************/ + +#include "emu.h" +#include "ide_rdev.h" +#include "bus/ata/ataintf.h" + + +namespace { + +class arc_ide_rdev_device : + public device_t, + public device_archimedes_podule_interface +{ +public: + // construction/destruction + arc_ide_rdev_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); + +protected: + // device-level overrides + virtual void device_start() override ATTR_COLD; + virtual void device_reset() override ATTR_COLD; + + // optional information overrides + virtual void device_add_mconfig(machine_config &config) override ATTR_COLD; + virtual const tiny_rom_entry *device_rom_region() const override ATTR_COLD; + + // device_archimedes_podule_interface overrides + virtual void ioc_map(address_map &map) override ATTR_COLD; + +private: + required_memory_region m_podule_rom; + + u8 m_rom_page; +}; + + +void arc_ide_rdev_device::ioc_map(address_map &map) +{ + map(0x0000, 0x1fff).lr8(NAME([this](offs_t offset) { return m_podule_rom->base()[offset | ((m_rom_page << 11) & 0x7800)]; })).umask32(0x000000ff); + map(0x2000, 0x2000).lw8(NAME([this](u8 data) { m_rom_page = data; })); + map(0x2400, 0x2403).nopw(); // TODO: interrupt enable? + map(0x2800, 0x281f).rw("ata", FUNC(ata_interface_device::cs0_r), FUNC(ata_interface_device::cs0_w)).umask32(0x0000ffff); +} + + +//------------------------------------------------- +// ROM( ide_riscdev ) +//------------------------------------------------- + +ROM_START( ide_riscdev ) + ROM_REGION(0x8000, "podule_rom", 0) + ROM_LOAD("ide_1.24_riscdev.bin", 0x0000, 0x8000, CRC(53bc8e72) SHA1(84e5d31d631b69401c47ef1ce91f11f1bb317597)) +ROM_END + +const tiny_rom_entry *arc_ide_rdev_device::device_rom_region() const +{ + return ROM_NAME( ide_riscdev ); +} + + +//------------------------------------------------- +// device_add_mconfig - add device configuration +//------------------------------------------------- + +void arc_ide_rdev_device::device_add_mconfig(machine_config &config) +{ + ata_interface_device &ata(ATA_INTERFACE(config, "ata").options(ata_devices, "hdd", nullptr, false)); + ata.irq_handler().set([this](int state) { set_pirq(state); }); +} + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// arc_ide_rdev_device - constructor +//------------------------------------------------- + +arc_ide_rdev_device::arc_ide_rdev_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : device_t(mconfig, ARC_IDE_RDEV, tag, owner, clock) + , device_archimedes_podule_interface(mconfig, *this) + , m_podule_rom(*this, "podule_rom") + , m_rom_page(0) +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void arc_ide_rdev_device::device_start() +{ + save_item(NAME(m_rom_page)); +} + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void arc_ide_rdev_device::device_reset() +{ + m_rom_page = 0x00; +} + +} // anonymous namespace + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +DEFINE_DEVICE_TYPE_PRIVATE(ARC_IDE_RDEV, device_archimedes_podule_interface, arc_ide_rdev_device, "arc_ide_rdev", "RISC Developments IDE Hard Disc System") |