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-rw-r--r--src/devices/bus/nes_ctrl/sharpcass.cpp89
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diff --git a/src/devices/bus/nes_ctrl/sharpcass.cpp b/src/devices/bus/nes_ctrl/sharpcass.cpp
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+// license:BSD-3-Clause
+// copyright-holders:kmg
+/**********************************************************************
+
+ Nintendo Family Computer Sharp Cassette Interface AN-300SL
+
+ An alternative to the Nintendo released Data Recorder. Unlike the
+ Data Recorder, which plugs into the Famicom Keyboard via audio jacks,
+ this Sharp Cassette Interface plugs directly into the expansion port
+ and connects to any cassette deck via two audio jacks. The Sharp and
+ Nintendo cassette interfaces are software incompatible.
+
+ This device is used by the built-in Graphics/Note program of the
+ Sharp My Computer Terebi C1 for saving/loading. Is there any other
+ use for this device?
+
+ TODO: The menu option of "play" when verifying saved data suggests
+ that the unit autodetects when the play button is pressed on a
+ cassette deck and signals this somehow to the Graphics/Note program.
+
+**********************************************************************/
+
+#include "emu.h"
+#include "sharpcass.h"
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(NES_SHARPCASS, nes_sharpcass_device, "nes_sharpcass", "Sharp Cassette Interface AN-300SL")
+
+
+//-------------------------------------------------
+// device_add_mconfig - add device configuration
+//-------------------------------------------------
+
+void nes_sharpcass_device::device_add_mconfig(machine_config &config)
+{
+ CASSETTE(config, m_cassette);
+ m_cassette->set_default_state(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED);
+ m_cassette->set_interface("fc_cass");
+}
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// nes_sharpcass_device - constructor
+//-------------------------------------------------
+
+nes_sharpcass_device::nes_sharpcass_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+ : device_t(mconfig, NES_SHARPCASS, tag, owner, clock)
+ , device_nes_control_port_interface(mconfig, *this)
+ , m_cassette(*this, "tape")
+{
+}
+
+
+//-------------------------------------------------
+// read
+//-------------------------------------------------
+
+u8 nes_sharpcass_device::read_exp(offs_t offset)
+{
+ u8 ret = 0;
+
+ if (offset == 1) // $4017
+ {
+ if ((m_cassette->get_state() & CASSETTE_MASK_UISTATE) == CASSETTE_PLAY)
+ {
+ if (m_cassette->input() < 0)
+ ret |= 0x04;
+ }
+ }
+
+ return ret;
+}
+
+//-------------------------------------------------
+// write
+//-------------------------------------------------
+
+void nes_sharpcass_device::write(u8 data)
+{
+ if ((m_cassette->get_state() & CASSETTE_MASK_UISTATE) == CASSETTE_RECORD)
+ m_cassette->output(BIT(data, 2) ? +1.0 : -1.0);
+}