diff options
Diffstat (limited to 'src/devices/bus/nes_ctrl/sharpcass.cpp')
-rw-r--r-- | src/devices/bus/nes_ctrl/sharpcass.cpp | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/src/devices/bus/nes_ctrl/sharpcass.cpp b/src/devices/bus/nes_ctrl/sharpcass.cpp new file mode 100644 index 00000000000..5668498bfd0 --- /dev/null +++ b/src/devices/bus/nes_ctrl/sharpcass.cpp @@ -0,0 +1,89 @@ +// 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); +} |