// license:BSD-3-Clause // copyright-holders:Chris Hardy #include "emu.h" #include "sound/sn76496.h" #include "sound/msm5205.h" #include "includes/trackfld.h" #include "audio/trackfld.h" #define TIMER_RATE (4096/4) DEFINE_DEVICE_TYPE(TRACKFLD_AUDIO, trackfld_audio_device, "trackfld_audio", "Track And Field Audio") trackfld_audio_device::trackfld_audio_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, TRACKFLD_AUDIO, tag, owner, clock) , device_sound_interface(mconfig, *this) , m_audiocpu(*this, finder_base::DUMMY_TAG) , m_vlm(*this, finder_base::DUMMY_TAG) , m_last_addr(0) , m_last_irq(0) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void trackfld_audio_device::device_start() { /* sound */ save_item(NAME(m_last_addr)); save_item(NAME(m_last_irq)); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void trackfld_audio_device::device_reset() { m_last_addr = 0; m_last_irq = 0; } /* The timer port on TnF and HyperSports sound hardware is derived from a 14.318 MHz clock crystal which is passed through a couple of 74ls393 ripple counters. Various outputs of the ripper counters clock the various chips. The Z80 uses 14.318 MHz / 4 (3.4MHz) The SN chip uses 14.318 MHz / 8 (1.7MHz) And the timer is connected to 14.318 MHz / 4096 As we are using the Z80 clockrate as a base value we need to multiply the no of cycles by 4 to undo the 14.318/4 operation */ READ8_MEMBER( trackfld_audio_device::trackfld_sh_timer_r ) { uint32_t clock = m_audiocpu->total_cycles() / TIMER_RATE; return clock & 0xF; } READ8_MEMBER( trackfld_audio_device::trackfld_speech_r ) { return m_vlm->bsy() ? 0x10 : 0; } WRITE8_MEMBER( trackfld_audio_device::trackfld_sound_w ) { int changes = offset ^ m_last_addr; /* A7 = data enable for VLM5030 (don't care ) */ /* A8 = STA pin (1->0 data data , 0->1 start speech */ /* A9 = RST pin 1=reset */ /* A8 VLM5030 ST pin */ if (changes & 0x100) m_vlm->st(offset & 0x100); /* A9 VLM5030 RST pin */ if (changes & 0x200) m_vlm->rst(offset & 0x200); m_last_addr = offset; } READ8_MEMBER( trackfld_audio_device::hyperspt_sh_timer_r ) { uint32_t clock = m_audiocpu->total_cycles() / TIMER_RATE; if (m_vlm != nullptr) return (clock & 0x3) | (m_vlm->bsy() ? 0x04 : 0); else return (clock & 0x3); } WRITE8_MEMBER( trackfld_audio_device::hyperspt_sound_w ) { int changes = offset ^ m_last_addr; /* A3 = data enable for VLM5030 (don't care ) */ /* A4 = STA pin (1->0 data data , 0->1 start speech */ /* A5 = RST pin 1=reset */ /* A6 = VLM5030 output disable (don't care ) */ /* A7 = kONAMI DAC output disable (don't care ) */ /* A8 = SN76489 output disable (don't care ) */ /* A4 VLM5030 ST pin */ if (changes & 0x10) m_vlm->st(offset & 0x10); /* A5 VLM5030 RST pin */ if( changes & 0x20 ) m_vlm->rst(offset & 0x20); m_last_addr = offset; } WRITE_LINE_MEMBER(trackfld_audio_device::sh_irqtrigger_w) { if (m_last_irq == 0 && state) { /* setting bit 0 low then high triggers IRQ on the sound CPU */ m_audiocpu->set_input_line_and_vector(0, HOLD_LINE, 0xff); // Z80 } m_last_irq = state; } //------------------------------------------------- // sound_stream_update - handle a stream update //------------------------------------------------- void trackfld_audio_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) { // should never get here fatalerror("sound_stream_update called; not applicable to legacy sound devices\n"); }