// license:BSD-3-Clause // copyright-holders:tim lindner /*************************************************************************** coco_stecomp.cpp Code for emulating The Stereo Composer by Speech Systems This cartridge is a simple sound cartridge. It had two 8-bit DACs connected thru a PIA. It contained no ROM. ***************************************************************************/ #include "emu.h" #include "coco_stecomp.h" #include "cococart.h" #include "sound/dac.h" #include "speaker.h" #include "machine/6821pia.h" //************************************************************************** // STEREO_COMPOSER DEVICE CLASS //************************************************************************** namespace { // ======================> coco_stereo_composer_device class coco_stereo_composer_device : public device_t, public device_cococart_interface { public: // construction/destruction coco_stereo_composer_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) : device_t(mconfig, COCO_STEREO_COMPOSER, tag, owner, clock) , device_cococart_interface(mconfig, *this) , m_pia(*this, "sc_pia") , m_ldac(*this, "sc_ldac") , m_rdac(*this, "sc_rdac") { } protected: // optional information overrides virtual void device_add_mconfig(machine_config &config) override; // device-level overrides virtual void device_start() override { // install handlers install_readwrite_handler( 0xFF70, 0xFF73, read8sm_delegate(*m_pia, FUNC(pia6821_device::read)), write8sm_delegate(*m_pia, FUNC(pia6821_device::write))); } private: // internal state required_device m_pia; required_device m_ldac; required_device m_rdac; }; //************************************************************************** // STEREO_COMPOSER MACHINE DECLARATIONS //************************************************************************** void coco_stereo_composer_device::device_add_mconfig(machine_config &config) { SPEAKER(config, "sc_lspeaker").front_left(); SPEAKER(config, "sc_rspeaker").front_right(); DAC_8BIT_R2R(config, m_ldac).add_route(ALL_OUTPUTS, "sc_lspeaker", 0.5); DAC_8BIT_R2R(config, m_rdac).add_route(ALL_OUTPUTS, "sc_rspeaker", 0.5); pia6821_device &pia(PIA6821(config, "sc_pia")); pia.writepa_handler().set("sc_ldac", FUNC(dac_byte_interface::data_w)); pia.writepb_handler().set("sc_rdac", FUNC(dac_byte_interface::data_w)); } } //************************************************************************** // DEVICE DECLARATION //************************************************************************** DEFINE_DEVICE_TYPE_PRIVATE(COCO_STEREO_COMPOSER, device_cococart_interface, coco_stereo_composer_device, "coco_stereo_composer", "Speech Systems Stereo Composer")