diff options
Diffstat (limited to 'src/devices/bus/epson_qx/ide.cpp')
-rw-r--r-- | src/devices/bus/epson_qx/ide.cpp | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/src/devices/bus/epson_qx/ide.cpp b/src/devices/bus/epson_qx/ide.cpp new file mode 100644 index 00000000000..7d709f442dc --- /dev/null +++ b/src/devices/bus/epson_qx/ide.cpp @@ -0,0 +1,110 @@ +// license:BSD-3-Clause +// copyright-holders:Brian Johnson +/******************************************************************* + * + * IDE Compact Flash Adapter + * + * This implements a Compact flash adapter expansion card for QX-10 + * systems. The boot disk necessary to support this card is listed below. + * + * Disk Image: https://github.com/brijohn/qx10/raw/master/diskimages/qx10cf.imd + * Board Design: https://github.com/brijohn/qx10/tree/master/kicad/cf_adapter + * + *******************************************************************/ + +#include "emu.h" +#include "ide.h" + + +//************************************************************************** +// EPSON IDE DEVICE +//************************************************************************** + +DEFINE_DEVICE_TYPE(EPSON_QX_OPTION_IDE, bus::epson_qx::ide_device, "epson_qx_option_ide", "Epson QX-10 Compact Flash Adapter") + +namespace bus::epson_qx { + +static INPUT_PORTS_START( ide ) + PORT_START("IOBASE") + PORT_CONFNAME(0xf0, 0xd0, "IO Base Address Selection") + PORT_CONFSETTING(0x80, "&80") + PORT_CONFSETTING(0x90, "&90") + PORT_CONFSETTING(0xa0, "&A0") + PORT_CONFSETTING(0xb0, "&B0") + PORT_CONFSETTING(0xc0, "&C0") + PORT_CONFSETTING(0xd0, "&D0") + PORT_CONFSETTING(0xe0, "&E0") + PORT_CONFSETTING(0xf0, "&F0") +INPUT_PORTS_END + +//------------------------------------------------- +// ide_device - constructor +//------------------------------------------------- +ide_device::ide_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : + ide_hdd_device_base(mconfig, EPSON_QX_OPTION_IDE, tag, owner, clock), + device_option_expansion_interface(mconfig, *this), + m_iobase(*this, "IOBASE"), + m_installed(false) +{ +} + +//------------------------------------------------- +// device_input_ports - device-specific ports +//------------------------------------------------- +ioport_constructor ide_device::device_input_ports() const +{ + return INPUT_PORTS_NAME( ide ); +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- +void ide_device::device_start() +{ + ide_hdd_device_base::device_start(); + + m_installed = false; + + save_item(NAME(m_installed)); +} + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- +void ide_device::device_reset() +{ + ide_hdd_device_base::device_reset(); + + if (!m_installed) { + address_space &space = m_bus->iospace(); + offs_t iobase = m_iobase->read() & 0xf0; + space.install_device(iobase, iobase+0x0f, *this, &ide_device::map); + m_installed = true; + } +} + +uint8_t ide_device::read(offs_t offset) +{ + if (offset < 8) { + return command_r(offset); + } else if (offset == 14 || offset == 15) { + return control_r(offset & 7); + } + return 0xff; +} + +void ide_device::write(offs_t offset, uint8_t data) +{ + if (offset < 8) { + command_w(offset, data); + } else if (offset == 14) { + control_w(offset & 7, data); + } +} + +void ide_device::map(address_map &map) +{ + map(0x00, 0x0f).rw(FUNC(ide_device::read), FUNC(ide_device::write)); +} + +} // namespace bus::epson_qx |