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Diffstat (limited to 'src/devices/bus/bbc/fdc/microware.cpp')
-rw-r--r--src/devices/bus/bbc/fdc/microware.cpp176
1 files changed, 176 insertions, 0 deletions
diff --git a/src/devices/bus/bbc/fdc/microware.cpp b/src/devices/bus/bbc/fdc/microware.cpp
new file mode 100644
index 00000000000..2dc527ea822
--- /dev/null
+++ b/src/devices/bus/bbc/fdc/microware.cpp
@@ -0,0 +1,176 @@
+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ United Disk Memories DDFS FDC
+
+ Microware DDFS FDC
+
+**********************************************************************/
+
+
+#include "emu.h"
+#include "microware.h"
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(BBC_MICROWARE, bbc_microware_device, "bbc_microware", "Microware DDFS FDC")
+
+
+//-------------------------------------------------
+// MACHINE_DRIVER( microware )
+//-------------------------------------------------
+
+FLOPPY_FORMATS_MEMBER( bbc_microware_device::floppy_formats )
+ FLOPPY_ACORN_SSD_FORMAT,
+ FLOPPY_ACORN_DSD_FORMAT,
+ FLOPPY_FSD_FORMAT
+FLOPPY_FORMATS_END
+
+static void bbc_floppies_525(device_slot_interface &device)
+{
+ device.option_add("525sssd", FLOPPY_525_SSSD);
+ device.option_add("525sd", FLOPPY_525_SD);
+ device.option_add("525ssdd", FLOPPY_525_SSDD);
+ device.option_add("525dd", FLOPPY_525_DD);
+ device.option_add("525qd", FLOPPY_525_QD);
+}
+
+ROM_START( microware )
+ ROM_REGION(0x4000, "dfs_rom", 0)
+ ROM_DEFAULT_BIOS("udm200")
+ ROM_SYSTEM_BIOS(0, "ddfs090", "Microware DDFS 0.90")
+ ROMX_LOAD("microware_ddfs090.rom", 0x0000, 0x4000, CRC(700d50e5) SHA1(6834e46cb15354003d553e6c2bdb4ed76b47a465), ROM_BIOS(0))
+ ROM_SYSTEM_BIOS(1, "udm200", "UDM DDFS 2.00")
+ ROMX_LOAD("udm_ddfs200.rom", 0x0000, 0x4000, CRC(1b4708a2) SHA1(0f37bcc73a758657cfe58c19f0cc92be9107e767), ROM_BIOS(1))
+ROM_END
+
+
+//-------------------------------------------------
+// device_add_mconfig - add device configuration
+//-------------------------------------------------
+
+void bbc_microware_device::device_add_mconfig(machine_config &config)
+{
+ WD2793(config, m_fdc, 16_MHz_XTAL / 16); // Replay advert suggests Type R8272 UDM DFS
+ m_fdc->intrq_wr_callback().set(FUNC(bbc_microware_device::fdc_intrq_w));
+ m_fdc->drq_wr_callback().set(FUNC(bbc_microware_device::fdc_drq_w));
+ m_fdc->hld_wr_callback().set(FUNC(bbc_microware_device::motor_w));
+
+ FLOPPY_CONNECTOR(config, m_floppy0, bbc_floppies_525, "525qd", floppy_formats).enable_sound(true);
+ FLOPPY_CONNECTOR(config, m_floppy1, bbc_floppies_525, "525qd", floppy_formats).enable_sound(true);
+}
+
+const tiny_rom_entry *bbc_microware_device::device_rom_region() const
+{
+ return ROM_NAME( microware );
+}
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// bbc_microware_device - constructor
+//-------------------------------------------------
+
+bbc_microware_device::bbc_microware_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, BBC_MICROWARE, tag, owner, clock)
+ , device_bbc_fdc_interface(mconfig, *this)
+ , m_dfs_rom(*this, "dfs_rom")
+ , m_fdc(*this, "wd2793")
+ , m_floppy0(*this, "wd2793:0")
+ , m_floppy1(*this, "wd2793:1")
+ , m_drive_control(0)
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void bbc_microware_device::device_start()
+{
+ save_item(NAME(m_drive_control));
+}
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void bbc_microware_device::device_reset()
+{
+ machine().root_device().membank("bank4")->configure_entry(12, memregion("dfs_rom")->base());
+}
+
+
+//**************************************************************************
+// IMPLEMENTATION
+//**************************************************************************
+
+READ8_MEMBER(bbc_microware_device::read)
+{
+ uint8_t data;
+
+ if (offset & 0x04)
+ {
+ data = m_fdc->read(offset & 0x03);
+ }
+ else
+ {
+ data = m_drive_control;
+ }
+ return data;
+}
+
+WRITE8_MEMBER(bbc_microware_device::write)
+{
+ if (offset & 0x04)
+ {
+ m_fdc->write(offset & 0x03, data);
+ }
+ else
+ {
+ floppy_image_device *floppy = nullptr;
+
+ m_drive_control = data;
+ logerror("fdc: Drive control %02x \n", data);
+ // bit 0: drive select
+ switch (BIT(data, 0))
+ {
+ case 0: floppy = m_floppy0->get_device(); break;
+ case 1: floppy = m_floppy1->get_device(); break;
+ }
+ m_fdc->set_floppy(floppy);
+
+ // bit 1: side select
+ if (floppy)
+ floppy->ss_w(BIT(data, 1));
+
+ // bit 2: density
+ m_fdc->dden_w(BIT(data, 2));
+
+ // bit 3: always set ???
+
+ // bit 4: ??? interrupt
+ }
+}
+
+WRITE_LINE_MEMBER(bbc_microware_device::fdc_intrq_w)
+{
+ m_slot->intrq_w(state);
+}
+
+WRITE_LINE_MEMBER(bbc_microware_device::fdc_drq_w)
+{
+ m_slot->drq_w(state);
+}
+
+WRITE_LINE_MEMBER(bbc_microware_device::motor_w)
+{
+ if (m_floppy0->get_device()) m_floppy0->get_device()->mon_w(!state);
+ if (m_floppy1->get_device()) m_floppy1->get_device()->mon_w(!state);
+}