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-rw-r--r--src/devices/bus/electron/cart/tube.cpp91
1 files changed, 91 insertions, 0 deletions
diff --git a/src/devices/bus/electron/cart/tube.cpp b/src/devices/bus/electron/cart/tube.cpp
new file mode 100644
index 00000000000..02dcd00275d
--- /dev/null
+++ b/src/devices/bus/electron/cart/tube.cpp
@@ -0,0 +1,91 @@
+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ Acorn Electron Tube Interface
+
+**********************************************************************/
+
+
+#include "emu.h"
+#include "tube.h"
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(ELECTRON_TUBE, electron_tube_device, "electron_tube", "Acorn Electron Tube Interface")
+
+
+//-------------------------------------------------
+// device_add_mconfig - add device configuration
+//-------------------------------------------------
+
+void electron_tube_device::device_add_mconfig(machine_config &config)
+{
+ /* tube port */
+ BBC_TUBE_SLOT(config, m_tube, electron_tube_devices, nullptr);
+ m_tube->irq_handler().set(DEVICE_SELF_OWNER, FUNC(electron_cartslot_device::irq_w));
+}
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// electron_tube_device - constructor
+//-------------------------------------------------
+
+electron_tube_device::electron_tube_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, ELECTRON_TUBE, tag, owner, clock)
+ , device_electron_cart_interface(mconfig, *this)
+ , m_tube(*this, "tube")
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void electron_tube_device::device_start()
+{
+}
+
+//-------------------------------------------------
+// read - cartridge data read
+//-------------------------------------------------
+
+uint8_t electron_tube_device::read(offs_t offset, int infc, int infd, int romqa, int oe, int oe2)
+{
+ uint8_t data = 0xff;
+
+ if (infc)
+ {
+ if (offset >= 0xe0 && offset < 0xf0)
+ {
+ data = m_tube->host_r(offset & 0x0f);
+ }
+ }
+ else if (oe2)
+ {
+ data = m_rom[offset & 0x1fff];
+ }
+
+ return data;
+}
+
+//-------------------------------------------------
+// write - cartridge data write
+//-------------------------------------------------
+
+void electron_tube_device::write(offs_t offset, uint8_t data, int infc, int infd, int romqa, int oe, int oe2)
+{
+ if (infc)
+ {
+ if (offset >= 0xe0 && offset < 0xf0)
+ {
+ m_tube->host_w(offset & 0x0f, data);
+ }
+ }
+}