// license:BSD-3-Clause // copyright-holders:Angelo Salese /************************************************************************************************** JMB-X1 sound card Used for PC-8001mkII/PC-8801 NRTDRV88J sound program http://upd780c1.g1.xrea.com/pc-8001/j80-25.html TODO: - Source claims it runs on INT3, but the vector that uses NRTDRV is clearly INT4. Is it configurable? **************************************************************************************************/ #include "emu.h" #include "jmbx1.h" DEFINE_DEVICE_TYPE(JMBX1, jmbx1_device, "jmbx1", "JMB-X1 \"Sound Board X\"") jmbx1_device::jmbx1_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : pc8801_exp_device(mconfig, JMBX1, tag, owner, clock) , m_opm1(*this, "opm1") , m_opm2(*this, "opm2") , m_ssg(*this, "ssg") { } void jmbx1_device::io_map(address_map &map) { map(0xc8, 0xc9).rw(m_opm1, FUNC(ym2151_device::read), FUNC(ym2151_device::write)); map(0xca, 0xcb).rw(m_opm2, FUNC(ym2151_device::read), FUNC(ym2151_device::write)); map(0xcc, 0xcd).w(m_ssg, FUNC(ym2149_device::address_data_w)); map(0xcd, 0xcd).r(m_ssg, FUNC(ym2149_device::data_r)); } void jmbx1_device::device_add_mconfig(machine_config &config) { constexpr XTAL jmb_x1_clock = XTAL(8'000'000); // TODO: OPM mixing // (SSG is mono) // doesn't seem to have irq mask YM2151(config, m_opm1, jmb_x1_clock / 2); m_opm1->irq_handler().set(FUNC(jmbx1_device::int4_w)); m_opm1->add_route(ALL_OUTPUTS, "^^lspeaker", 0.25); m_opm1->add_route(ALL_OUTPUTS, "^^rspeaker", 0.25); YM2151(config, m_opm2, jmb_x1_clock / 2); m_opm2->add_route(ALL_OUTPUTS, "^^lspeaker", 0.25); m_opm2->add_route(ALL_OUTPUTS, "^^rspeaker", 0.25); YM2149(config, m_ssg, jmb_x1_clock / 4); // TODO: adds a non-negligible DC offset, likely needs high pass filter m_ssg->add_route(ALL_OUTPUTS, "^^lspeaker", 0.20); m_ssg->add_route(ALL_OUTPUTS, "^^rspeaker", 0.20); }