// license:BSD-3-Clause // copyright-holders:Barry Rodewald /* PlayCity expansion device Z80 CTC 2x YMZ294 (clocks provided by CTC) TODO: IRQs aren't working currently, the Z80CTC core requires the daisy chain setup to acknowledge IRQs properly, and that can't be used in a slot device currently. */ #include "emu.h" #include "playcity.h" #include "speaker.h" SLOT_INTERFACE_EXTERN(cpc_exp_cards); //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** const device_type CPC_PLAYCITY = device_creator; // device machine config static MACHINE_CONFIG_FRAGMENT( cpc_playcity ) MCFG_DEVICE_ADD("ctc", Z80CTC, XTAL_4MHz) MCFG_Z80CTC_ZC1_CB(WRITELINE(cpc_playcity_device,ctc_zc1_cb)) MCFG_Z80CTC_ZC2_CB(DEVWRITELINE("ctc",z80ctc_device,trg3)) MCFG_Z80CTC_INTR_CB(WRITELINE(cpc_playcity_device,ctc_intr_cb)) MCFG_SPEAKER_STANDARD_STEREO("lspeaker","rspeaker") MCFG_SOUND_ADD("ymz_1",YMZ294,XTAL_4MHz) // when timer is not set, operates at 4MHz (interally divided by 2, so equivalent to the ST) MCFG_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 0.30) MCFG_SOUND_ADD("ymz_2",YMZ294,XTAL_4MHz) MCFG_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 0.30) // pass-through MCFG_DEVICE_ADD("exp", CPC_EXPANSION_SLOT, 0) MCFG_DEVICE_SLOT_INTERFACE(cpc_exp_cards, nullptr, false) MCFG_CPC_EXPANSION_SLOT_OUT_IRQ_CB(DEVWRITELINE("^", cpc_expansion_slot_device, irq_w)) MCFG_CPC_EXPANSION_SLOT_OUT_NMI_CB(DEVWRITELINE("^", cpc_expansion_slot_device, nmi_w)) MCFG_CPC_EXPANSION_SLOT_OUT_ROMDIS_CB(DEVWRITELINE("^", cpc_expansion_slot_device, romdis_w)) // ROMDIS MACHINE_CONFIG_END machine_config_constructor cpc_playcity_device::device_mconfig_additions() const { return MACHINE_CONFIG_NAME( cpc_playcity ); } //************************************************************************** // LIVE DEVICE //************************************************************************** cpc_playcity_device::cpc_playcity_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, CPC_PLAYCITY, "PlayCity", tag, owner, clock, "cpc_playcity", __FILE__), device_cpc_expansion_card_interface(mconfig, *this), m_slot(nullptr), m_ctc(*this,"ctc"), m_ymz1(*this,"ymz_1"), m_ymz2(*this,"ymz_2") { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void cpc_playcity_device::device_start() { device_t* cpu = machine().device("maincpu"); address_space& space = cpu->memory().space(AS_IO); m_slot = dynamic_cast(owner()); space.install_readwrite_handler(0xf880,0xf883,read8_delegate(FUNC(cpc_playcity_device::ctc_r),this),write8_delegate(FUNC(cpc_playcity_device::ctc_w),this)); space.install_readwrite_handler(0xf884,0xf884,read8_delegate(FUNC(cpc_playcity_device::ymz1_data_r),this),write8_delegate(FUNC(cpc_playcity_device::ymz1_data_w),this)); space.install_readwrite_handler(0xf888,0xf888,read8_delegate(FUNC(cpc_playcity_device::ymz2_data_r),this),write8_delegate(FUNC(cpc_playcity_device::ymz2_data_w),this)); space.install_write_handler(0xf984,0xf984,write8_delegate(FUNC(cpc_playcity_device::ymz1_address_w),this)); space.install_write_handler(0xf988,0xf988,write8_delegate(FUNC(cpc_playcity_device::ymz2_address_w),this)); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void cpc_playcity_device::device_reset() { } READ8_MEMBER(cpc_playcity_device::ctc_r) { return m_ctc->read(space,offset); } WRITE8_MEMBER(cpc_playcity_device::ctc_w) { m_ctc->write(space,offset,data); if(offset == 0) update_ymz_clock(); } WRITE8_MEMBER(cpc_playcity_device::ymz1_address_w) { m_ymz1->address_w(space,offset,data); } WRITE8_MEMBER(cpc_playcity_device::ymz2_address_w) { m_ymz2->address_w(space,offset,data); } WRITE8_MEMBER(cpc_playcity_device::ymz1_data_w) { m_ymz1->data_w(space,offset,data); } WRITE8_MEMBER(cpc_playcity_device::ymz2_data_w) { m_ymz2->data_w(space,offset,data); } READ8_MEMBER(cpc_playcity_device::ymz1_data_r) { return m_ymz1->data_r(space,offset); } READ8_MEMBER(cpc_playcity_device::ymz2_data_r) { return m_ymz2->data_r(space,offset); } void cpc_playcity_device::update_ymz_clock() { // Bit of a hack job here, since there is no way currently to connect the CTC channel output directly to the YMZ clocks. uint8_t rate = m_ctc->get_channel_constant(0); uint32_t clk = XTAL_4MHz; switch(rate) { case 0x00: clk = 3980000; break; case 0x01: clk = 2000000; break; case 0x02: clk = 3000000; break; case 0x03: clk = 3330000; break; case 0x04: clk = 3500000; break; case 0x05: clk = 3600000; break; case 0x06: clk = 3670000; break; case 0x07: clk = 3710000; break; case 0x08: clk = 3750000; break; case 0x09: clk = 3780000; break; case 0x0a: clk = 3800000; break; case 0x0b: clk = 3820000; break; case 0x0c: clk = 3830000; break; case 0x0d: clk = 3850000; break; case 0x0e: clk = 3860000; break; case 0x0f: clk = 3870000; break; } clk = clk / 2; // YMZ294 has an internal /2 divider (not handled in AY core?) m_ymz1->ay_set_clock(clk); m_ymz2->ay_set_clock(clk); popmessage("YMZ clocks set to %d Hz",clk); }