diff options
Diffstat (limited to 'src/devices/bus/thomson/cd90_640.cpp')
| -rw-r--r-- | src/devices/bus/thomson/cd90_640.cpp | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/src/devices/bus/thomson/cd90_640.cpp b/src/devices/bus/thomson/cd90_640.cpp new file mode 100644 index 00000000000..4cae4efb97a --- /dev/null +++ b/src/devices/bus/thomson/cd90_640.cpp @@ -0,0 +1,91 @@ +// license:BSD-3-Clause +// copyright-holders:Olivier Galibert + +// CD 90-640 - Floppy drive controller built from a wd1770 +// +// Handles up to two 5.25 dual-sided drives (DD 90-320) + +#include "emu.h" +#include "cd90_640.h" +#include "formats/thom_dsk.h" + +DEFINE_DEVICE_TYPE(CD90_640, cd90_640_device, "cd90_640", "Thomson CD90-640 floppy drive controller") + +cd90_640_device::cd90_640_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : + device_t(mconfig, CD90_640, tag, owner, clock), + thomson_extension_interface(mconfig, *this), + m_fdc(*this, "fdc"), + m_floppy(*this, "%u", 0U), + m_rom(*this, "rom") +{ +} + +ROM_START(cd90_640) + ROM_REGION( 0x7c0, "rom", 0 ) + ROM_LOAD ( "cd90-640.rom", 0x000, 0x7c0, CRC(5114c0a5) SHA1(5c72566c22d8160ef0c75959e1863a1309bbbe49) ) +ROM_END + +void cd90_640_device::rom_map(address_map &map) +{ + map(0x000, 0x7bf).rom().region(m_rom, 0); +} + +void cd90_640_device::io_map(address_map &map) +{ + map(0, 3).rw(m_fdc, FUNC(wd1770_device::read), FUNC(wd1770_device::write)); + map(8, 8).rw(FUNC(cd90_640_device::control_r), FUNC(cd90_640_device::control_w)); +} + +const tiny_rom_entry *cd90_640_device::device_rom_region() const +{ + return ROM_NAME(cd90_640); +} + +void cd90_640_device::floppy_drives(device_slot_interface &device) +{ + device.option_add("dd90_640", FLOPPY_525_DD); +} + +void cd90_640_device::floppy_formats(format_registration &fr) +{ + fr.add(FLOPPY_THOMSON_525_FORMAT); +} + +void cd90_640_device::device_add_mconfig(machine_config &config) +{ + WD1770(config, m_fdc, 8_MHz_XTAL); + FLOPPY_CONNECTOR(config, m_floppy[0], floppy_drives, "dd90_640", floppy_formats).enable_sound(true); + FLOPPY_CONNECTOR(config, m_floppy[1], floppy_drives, nullptr, floppy_formats).enable_sound(true); +} + +void cd90_640_device::device_start() +{ + save_item(NAME(m_control)); +} + +void cd90_640_device::device_reset() +{ + m_control = 0; + m_fdc->set_floppy(nullptr); + m_fdc->dden_w(0); +} + +void cd90_640_device::control_w(u8 data) +{ + m_control = data; + floppy_image_device *floppy = nullptr; + if(m_control & 2) + floppy = m_floppy[0]->get_device(); + else if(m_control & 4) + floppy = m_floppy[1]->get_device(); + if(floppy) + floppy->ss_w(m_control & 1); + m_fdc->set_floppy(floppy); + m_fdc->dden_w(m_control & 0x80 ? 1 : 0); + logerror("control %02x\n", m_control); +} + +u8 cd90_640_device::control_r() +{ + return m_control; +} |
