// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** MOS Technology 6530 Memory, I/O, Timer Array emulation MOS Technology 6532 RAM, I/O, Timer Array emulation **********************************************************************/ #include "mos6530n.h" //************************************************************************** // MACROS / CONSTANTS //************************************************************************** #define LOG 0 #define LOG_TIMER 0 //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** const device_type MOS6530n = &device_creator; const device_type MOS6532n = &device_creator; DEVICE_ADDRESS_MAP_START( rom_map, 8, mos6530_t ) ADDRESS_MAP_GLOBAL_MASK(0x3ff) AM_RANGE(0x000, 0x3ff) AM_READ(rom_r) ADDRESS_MAP_END DEVICE_ADDRESS_MAP_START( ram_map, 8, mos6530_t ) ADDRESS_MAP_GLOBAL_MASK(0x3f) AM_RANGE(0x00, 0x3f) AM_READWRITE(ram_r, ram_w) ADDRESS_MAP_END DEVICE_ADDRESS_MAP_START( io_map, 8, mos6530_t ) ADDRESS_MAP_GLOBAL_MASK(0xf) AM_RANGE(0x00, 0x00) AM_MIRROR(0x8) AM_READWRITE(pa_data_r, pa_data_w) AM_RANGE(0x01, 0x01) AM_MIRROR(0x8) AM_READWRITE(pa_ddr_r, pa_ddr_w) AM_RANGE(0x02, 0x02) AM_MIRROR(0x8) AM_READWRITE(pb_data_r, pb_data_w) AM_RANGE(0x03, 0x03) AM_MIRROR(0x8) AM_READWRITE(pb_ddr_r, pb_ddr_w) AM_RANGE(0x04, 0x07) AM_WRITE(timer_off_w) AM_RANGE(0x0c, 0x0f) AM_WRITE(timer_on_w) AM_RANGE(0x04, 0x04) AM_MIRROR(0x2) AM_READ(timer_off_r) AM_RANGE(0x0c, 0x0c) AM_MIRROR(0x2) AM_READ(timer_on_r) AM_RANGE(0x05, 0x05) AM_MIRROR(0xa) AM_READ(irq_r) ADDRESS_MAP_END DEVICE_ADDRESS_MAP_START( ram_map, 8, mos6532_t ) ADDRESS_MAP_GLOBAL_MASK(0x7f) AM_RANGE(0x00, 0x7f) AM_READWRITE(ram_r, ram_w) ADDRESS_MAP_END DEVICE_ADDRESS_MAP_START( io_map, 8, mos6532_t ) ADDRESS_MAP_GLOBAL_MASK(0x1f) AM_RANGE(0x00, 0x00) AM_MIRROR(0x18) AM_READWRITE(pa_data_r, pa_data_w) // SWCHA AM_RANGE(0x01, 0x01) AM_MIRROR(0x18) AM_READWRITE(pa_ddr_r, pa_ddr_w) // SWACNT AM_RANGE(0x02, 0x02) AM_MIRROR(0x18) AM_READWRITE(pb_data_r, pb_data_w) // SWCHB AM_RANGE(0x03, 0x03) AM_MIRROR(0x18) AM_READWRITE(pb_ddr_r, pb_ddr_w) // SWBCNT AM_RANGE(0x14, 0x17) AM_WRITE(timer_off_w) AM_RANGE(0x1c, 0x1f) AM_WRITE(timer_on_w) AM_RANGE(0x04, 0x04) AM_MIRROR(0x12) AM_READ(timer_off_r) AM_RANGE(0x0c, 0x0c) AM_MIRROR(0x12) AM_READ(timer_on_r) AM_RANGE(0x05, 0x05) AM_MIRROR(0x1a) AM_READ(irq_r) AM_RANGE(0x04, 0x07) AM_MIRROR(0x8) AM_WRITE(edge_w) ADDRESS_MAP_END READ8_MEMBER(mos6532_t::io_r) { offset &= 0x1f; UINT8 ret = 0; if (offset == 0x00 || offset == 0x08 || offset == 0x10 || offset == 0x18) ret = pa_data_r(space, 0); if (offset == 0x01 || offset == 0x09 || offset == 0x11 || offset == 0x19) ret = pa_ddr_r(space, 0); if (offset == 0x02 || offset == 0x0a || offset == 0x12 || offset == 0x1a) ret = pb_data_r(space, 0); if (offset == 0x03 || offset == 0x0b || offset == 0x13 || offset == 0x1b) ret = pb_ddr_r(space, 0); if (offset == 0x04 || offset == 0x06 || offset == 0x14 || offset == 0x16) ret = timer_off_r(space, 0); if (offset == 0x0c || offset == 0x0e || offset == 0x1c || offset == 0x1e) ret = timer_on_r(space, 0); if (offset == 0x05 || offset == 0x07 || offset == 0x0d || offset == 0x0f) ret = irq_r(space, 0); if (offset == 0x15 || offset == 0x17 || offset == 0x1d || offset == 0x1f) ret = irq_r(space, 0); return ret; } WRITE8_MEMBER(mos6532_t::io_w) { offset &= 0x1f; if (offset == 0x00 || offset == 0x08 || offset == 0x10 || offset == 0x18) pa_data_w(space, 0, data); if (offset == 0x01 || offset == 0x09 || offset == 0x11 || offset == 0x19) pa_ddr_w(space, 0, data); if (offset == 0x02 || offset == 0x0a || offset == 0x12 || offset == 0x1a) pb_data_w(space, 0, data); if (offset == 0x03 || offset == 0x0b || offset == 0x13 || offset == 0x1b) pb_ddr_w(space, 0, data); if (offset == 0x14 || offset == 0x15 || offset == 0x16 || offset == 0x17) timer_off_w(space, offset&3, data); if (offset == 0x1c || offset == 0x1d || offset == 0x1e || offset == 0x1f) timer_on_w(space, offset&3, data); if (offset == 0x04 || offset == 0x05 || offset == 0x06 || offset == 0x07) edge_w(space, offset&3, data); if (offset == 0x0c || offset == 0x0d || offset == 0xea || offset == 0x0f) edge_w(space, offset&3, data); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // mos6530_base_t - constructor //------------------------------------------------- mos6530_base_t::mos6530_base_t(const machine_config &mconfig, device_type type, std::string name, std::string tag, device_t *owner, UINT32 clock, std::string shortname, std::string source) : device_t(mconfig, type, name, tag, owner, clock, shortname, source), m_ram(*this), m_irq_cb(*this), m_in_pa_cb(*this), m_out_pa_cb(*this), m_in_pb_cb(*this), m_out_pb_cb(*this), m_in_pa0_cb(*this), m_in_pa1_cb(*this), m_in_pa2_cb(*this), m_in_pa3_cb(*this), m_in_pa4_cb(*this), m_in_pa5_cb(*this), m_in_pa6_cb(*this), m_in_pa7_cb(*this), m_out_pa0_cb(*this), m_out_pa1_cb(*this), m_out_pa2_cb(*this), m_out_pa3_cb(*this), m_out_pa4_cb(*this), m_out_pa5_cb(*this), m_out_pa6_cb(*this), m_out_pa7_cb(*this), m_in_pb0_cb(*this), m_in_pb1_cb(*this), m_in_pb2_cb(*this), m_in_pb3_cb(*this), m_in_pb4_cb(*this), m_in_pb5_cb(*this), m_in_pb6_cb(*this), m_in_pb7_cb(*this), m_out_pb0_cb(*this), m_out_pb1_cb(*this), m_out_pb2_cb(*this), m_out_pb3_cb(*this), m_out_pb4_cb(*this), m_out_pb5_cb(*this), m_out_pb6_cb(*this), m_out_pb7_cb(*this), m_pa_in(0xff), m_pa_out(0), m_pa_ddr(0), m_pa7(0), m_pa7_dir(0), m_pb_in(0xff), m_pb_out(0), m_pb_ddr(0), m_ie_timer(false), m_irq_timer(true), m_ie_edge(false), m_irq_edge(false) { cur_live.tm = attotime::never; cur_live.state = IDLE; cur_live.next_state = -1; } //------------------------------------------------- // mos6530_t - constructor //------------------------------------------------- mos6530_t::mos6530_t(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock) : mos6530_base_t(mconfig, MOS6530n, "MOS6530n", tag, owner, clock, "mos6530n", __FILE__) { } //------------------------------------------------- // mos6532_t - constructor //------------------------------------------------- mos6532_t::mos6532_t(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock) : mos6530_base_t(mconfig, MOS6532n, "MOS6532n", tag, owner, clock, "mos6532n", __FILE__) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void mos6530_base_t::device_start() { // resolve callbacks m_irq_cb.resolve_safe(); m_in_pa_cb.resolve(); m_out_pa_cb.resolve(); m_in_pb_cb.resolve(); m_out_pb_cb.resolve(); m_in_pa0_cb.resolve(); m_in_pa1_cb.resolve(); m_in_pa2_cb.resolve(); m_in_pa3_cb.resolve(); m_in_pa4_cb.resolve(); m_in_pa5_cb.resolve(); m_in_pa6_cb.resolve(); m_in_pa7_cb.resolve(); m_out_pa0_cb.resolve_safe(); m_out_pa1_cb.resolve_safe(); m_out_pa2_cb.resolve_safe(); m_out_pa3_cb.resolve_safe(); m_out_pa4_cb.resolve_safe(); m_out_pa5_cb.resolve_safe(); m_out_pa6_cb.resolve_safe(); m_out_pa7_cb.resolve_safe(); m_in_pb0_cb.resolve(); m_in_pb1_cb.resolve(); m_in_pb2_cb.resolve(); m_in_pb3_cb.resolve(); m_in_pb4_cb.resolve(); m_in_pb5_cb.resolve(); m_in_pb6_cb.resolve(); m_in_pb7_cb.resolve(); m_out_pb0_cb.resolve_safe(); m_out_pb1_cb.resolve_safe(); m_out_pb2_cb.resolve_safe(); m_out_pb3_cb.resolve_safe(); m_out_pb4_cb.resolve_safe(); m_out_pb5_cb.resolve_safe(); m_out_pb6_cb.resolve_safe(); m_out_pb7_cb.resolve_safe(); // allocate timer t_gen = timer_alloc(0); // state saving save_item(NAME(m_pa_in)); save_item(NAME(m_pa_out)); save_item(NAME(m_pa_ddr)); save_item(NAME(m_pa7)); save_item(NAME(m_pa7_dir)); save_item(NAME(m_pb_in)); save_item(NAME(m_pb_out)); save_item(NAME(m_pb_ddr)); save_item(NAME(m_ie_timer)); save_item(NAME(m_irq_timer)); save_item(NAME(m_ie_edge)); save_item(NAME(m_irq_edge)); save_item(NAME(m_prescale)); save_item(NAME(m_timer)); } void mos6530_t::device_start() { mos6530_base_t::device_start(); // allocate RAM m_ram.allocate(0x40); } void mos6532_t::device_start() { mos6530_base_t::device_start(); // allocate RAM m_ram.allocate(0x80); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void mos6530_base_t::device_reset() { m_pa_out = 0xff; m_pa_ddr = 0; m_pb_out = 0xff; // a7800 One-On-One Basketball (1on1u) needs this or you can't start a game, it doesn't initialize it. (see MT6060) m_pb_ddr = 0; m_ie_timer = false; m_irq_timer = false; m_ie_edge = false; m_irq_edge = false; m_pa7_dir = 0; update_pa(); update_pb(); update_irq(); edge_detect(); m_timer = 0xff; m_prescale = 1024; if (cur_live.state != IDLE) { live_abort(); } live_start(); live_run(); } //------------------------------------------------- // device_timer - handler timer events //------------------------------------------------- void mos6530_base_t::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) { live_sync(); live_run(); } //------------------------------------------------- // update_pa - //------------------------------------------------- void mos6530_base_t::update_pa() { UINT8 out = m_pa_out; UINT8 ddr = m_pa_ddr; UINT8 data = (out & ddr) | (ddr ^ 0xff); if (m_out_pa_cb.isnull()) { m_out_pa0_cb(BIT(data, 0)); m_out_pa1_cb(BIT(data, 1)); m_out_pa2_cb(BIT(data, 2)); m_out_pa3_cb(BIT(data, 3)); m_out_pa4_cb(BIT(data, 4)); m_out_pa5_cb(BIT(data, 5)); m_out_pa6_cb(BIT(data, 6)); m_out_pa7_cb(BIT(data, 7)); } else { m_out_pa_cb(data); } } //------------------------------------------------- // update_pb - //------------------------------------------------- void mos6530_base_t::update_pb() { UINT8 out = m_pb_out; UINT8 ddr = m_pb_ddr; UINT8 data = (out & ddr) | (ddr ^ 0xff); if (m_out_pb_cb.isnull()) { m_out_pb0_cb(BIT(data, 0)); m_out_pb1_cb(BIT(data, 1)); m_out_pb2_cb(BIT(data, 2)); m_out_pb3_cb(BIT(data, 3)); m_out_pb4_cb(BIT(data, 4)); m_out_pb5_cb(BIT(data, 5)); m_out_pb6_cb(BIT(data, 6)); m_out_pb7_cb(BIT(data, 7)); } else { m_out_pb_cb(data); } } void mos6530_t::update_pb() { UINT8 out = m_pb_out; UINT8 ddr = m_pb_ddr; UINT8 data = (out & ddr) | (ddr ^ 0xff); if (m_ie_timer) { if (m_irq_timer) { data |= IRQ_TIMER; } else { data &= ~IRQ_TIMER; } } if (m_out_pb_cb.isnull()) { m_out_pb0_cb(BIT(data, 0)); m_out_pb1_cb(BIT(data, 1)); m_out_pb2_cb(BIT(data, 2)); m_out_pb3_cb(BIT(data, 3)); m_out_pb4_cb(BIT(data, 4)); m_out_pb5_cb(BIT(data, 5)); m_out_pb6_cb(BIT(data, 6)); m_out_pb7_cb(BIT(data, 7)); } else { m_out_pb_cb(data); } } //------------------------------------------------- // update_irq - //------------------------------------------------- void mos6530_base_t::update_irq() { int state = CLEAR_LINE; if (m_ie_timer && m_irq_timer) state = ASSERT_LINE; if (m_ie_edge && m_irq_edge) state = ASSERT_LINE; m_irq_cb(state); } void mos6530_t::update_irq() { update_pb(); } //------------------------------------------------- // get_irq_flags - //------------------------------------------------- UINT8 mos6530_base_t::get_irq_flags() { UINT8 data = 0; if (m_irq_timer) data |= IRQ_TIMER; if (m_irq_edge) data |= IRQ_EDGE; return data; } UINT8 mos6530_t::get_irq_flags() { UINT8 data = 0; if (m_irq_timer) data |= IRQ_TIMER; return data; } //------------------------------------------------- // edge_detect - //------------------------------------------------- void mos6530_base_t::edge_detect() { UINT8 ddr_out = m_pa_ddr; UINT8 ddr_in = m_pa_ddr ^ 0xff; UINT8 data = (m_pa_out & ddr_out) | (m_pa_in & ddr_in); int state = BIT(data, 7); if ((m_pa7 ^ state) && (m_pa7_dir ^ state) == 0) { if (LOG) logerror("%s %s '%s' edge-detect IRQ\n", machine().time().as_string(), name().c_str(), tag().c_str()); m_irq_edge = true; update_irq(); } m_pa7 = state; } //------------------------------------------------- // pa_w - //------------------------------------------------- void mos6530_base_t::pa_w(int bit, int state) { if (LOG) logerror("%s %s %s '%s' Port A Data Bit %u State %u\n", machine().time().as_string(), machine().describe_context(), name().c_str(), tag().c_str(), bit, state); m_pa_in &= ~(1 << bit); m_pa_in |= (state << bit); edge_detect(); } //------------------------------------------------- // pb_w - //------------------------------------------------- void mos6530_base_t::pb_w(int bit, int state) { if (LOG) logerror("%s %s %s '%s' Port B Data Bit %u State %u\n", machine().time().as_string(), machine().describe_context(), name().c_str(), tag().c_str(), bit, state); m_pb_in &= ~(1 << bit); m_pb_in |= (state << bit); } //------------------------------------------------- // pa_data_r - //------------------------------------------------- READ8_MEMBER( mos6530_base_t::pa_data_r ) { UINT8 in = 0; if (m_in_pa_cb.isnull()) { in |= (m_in_pa0_cb.isnull() ? BIT(m_pa_in, 0) : m_in_pa0_cb()); in |= (m_in_pa1_cb.isnull() ? BIT(m_pa_in, 1) : m_in_pa1_cb()) << 1; in |= (m_in_pa2_cb.isnull() ? BIT(m_pa_in, 2) : m_in_pa2_cb()) << 2; in |= (m_in_pa3_cb.isnull() ? BIT(m_pa_in, 3) : m_in_pa3_cb()) << 3; in |= (m_in_pa4_cb.isnull() ? BIT(m_pa_in, 4) : m_in_pa4_cb()) << 4; in |= (m_in_pa5_cb.isnull() ? BIT(m_pa_in, 5) : m_in_pa5_cb()) << 5; in |= (m_in_pa6_cb.isnull() ? BIT(m_pa_in, 6) : m_in_pa6_cb()) << 6; in |= (m_in_pa7_cb.isnull() ? BIT(m_pa_in, 7) : m_in_pa7_cb()) << 7; } else { in = m_in_pa_cb(); } UINT8 out = m_pa_out; UINT8 ddr_out = m_pa_ddr; UINT8 ddr_in = m_pa_ddr ^ 0xff; UINT8 data = (out & ddr_out) | (in & ddr_in); if (LOG) logerror("%s %s %s '%s' Port A Data In %02x\n", machine().time().as_string(), machine().describe_context(), name().c_str(), tag().c_str(), data); return data; } //------------------------------------------------- // pa_data_w - //------------------------------------------------- WRITE8_MEMBER( mos6530_base_t::pa_data_w ) { m_pa_out = data; if (LOG) logerror("%s %s %s '%s' Port A Data Out %02x\n", machine().time().as_string(), machine().describe_context(), name().c_str(), tag().c_str(), data); update_pa(); edge_detect(); } //------------------------------------------------- // pa_ddr_w - //------------------------------------------------- WRITE8_MEMBER( mos6530_base_t::pa_ddr_w ) { m_pa_ddr = data; if (LOG) logerror("%s %s %s '%s' Port A DDR %02x\n", machine().time().as_string(), machine().describe_context(), name().c_str(), tag().c_str(), data); update_pa(); edge_detect(); } //------------------------------------------------- // pb_data_r - //------------------------------------------------- READ8_MEMBER( mos6530_base_t::pb_data_r ) { UINT8 in = 0; if (m_in_pb_cb.isnull()) { in |= (m_in_pb0_cb.isnull() ? BIT(m_pb_in, 0) : m_in_pb0_cb()); in |= (m_in_pb1_cb.isnull() ? BIT(m_pb_in, 1) : m_in_pb1_cb()) << 1; in |= (m_in_pb2_cb.isnull() ? BIT(m_pb_in, 2) : m_in_pb2_cb()) << 2; in |= (m_in_pb3_cb.isnull() ? BIT(m_pb_in, 3) : m_in_pb3_cb()) << 3; in |= (m_in_pb4_cb.isnull() ? BIT(m_pb_in, 4) : m_in_pb4_cb()) << 4; in |= (m_in_pb5_cb.isnull() ? BIT(m_pb_in, 5) : m_in_pb5_cb()) << 5; in |= (m_in_pb6_cb.isnull() ? BIT(m_pb_in, 6) : m_in_pb6_cb()) << 6; in |= (m_in_pb7_cb.isnull() ? BIT(m_pb_in, 7) : m_in_pb7_cb()) << 7; } else { in = m_in_pb_cb(); } UINT8 out = m_pb_out; UINT8 ddr_out = m_pb_ddr; UINT8 ddr_in = m_pb_ddr ^ 0xff; UINT8 data = (out & ddr_out) | (in & ddr_in); if (LOG) logerror("%s %s %s '%s' Port B Data In %02x\n", machine().time().as_string(), machine().describe_context(), name().c_str(), tag().c_str(), data); return data; } //------------------------------------------------- // pb_data_w - //------------------------------------------------- WRITE8_MEMBER( mos6530_base_t::pb_data_w ) { m_pb_out = data; if (LOG) logerror("%s %s %s '%s' Port B Data Out %02x\n", machine().time().as_string(), machine().describe_context(), name().c_str(), tag().c_str(), data); update_pb(); } //------------------------------------------------- // pb_ddr_w - //------------------------------------------------- WRITE8_MEMBER( mos6530_base_t::pb_ddr_w ) { m_pb_ddr = data; if (LOG) logerror("%s %s %s '%s' Port B DDR %02x\n", machine().time().as_string(), machine().describe_context(), name().c_str(), tag().c_str(), data); update_pb(); } //------------------------------------------------- // timer_r - //------------------------------------------------- READ8_MEMBER( mos6530_base_t::timer_off_r ) { if (space.debugger_access()) return 0; return timer_r(false); } READ8_MEMBER( mos6530_base_t::timer_on_r ) { if (space.debugger_access()) return 0; return timer_r(true); } UINT8 mos6530_base_t::timer_r(bool ie) { UINT8 data; live_sync(); m_ie_timer = ie; if (cur_live.tm_irq != machine().time()) { m_irq_timer = false; } update_irq(); data = cur_live.value; if (LOG_TIMER) logerror("%s %s %s '%s' Timer read %02x IE %u\n", machine().time().as_string(), machine().describe_context(), name().c_str(), tag().c_str(), data, m_ie_timer ? 1 : 0); checkpoint(); live_run(); return data; } //------------------------------------------------- // irq_r - //------------------------------------------------- READ8_MEMBER( mos6530_base_t::irq_r ) { UINT8 data = get_irq_flags(); if (!space.debugger_access()) { if (m_irq_edge) { m_irq_edge = false; update_irq(); } } return data; } //------------------------------------------------- // timer_w - //------------------------------------------------- WRITE8_MEMBER( mos6530_base_t::timer_off_w ) { timer_w(offset, data, false); } WRITE8_MEMBER( mos6530_base_t::timer_on_w ) { timer_w(offset, data, true); } void mos6530_base_t::timer_w(offs_t offset, UINT8 data, bool ie) { live_sync(); m_timer = data; switch (offset & 0x03) { case 0: m_prescale = 1; break; case 1: m_prescale = 8; break; case 2: m_prescale = 64; break; case 3: m_prescale = 1024; break; } m_ie_timer = ie; if (cur_live.tm_irq != machine().time()) { m_irq_timer = false; } update_irq(); if (LOG_TIMER) logerror("%s %s %s '%s' Timer value %02x prescale %u IE %u\n", machine().time().as_string(), machine().describe_context(), name().c_str(), tag().c_str(), data, m_prescale, m_ie_timer ? 1 : 0); checkpoint(); if (cur_live.state != IDLE) { live_abort(); } live_start(); live_run(); } //------------------------------------------------- // edge_w - //------------------------------------------------- WRITE8_MEMBER( mos6530_base_t::edge_w ) { m_pa7_dir = BIT(data, 0); m_ie_edge = BIT(data, 1) ? false : true; if (LOG) logerror("%s %s %s '%s' %s edge-detect, %s interrupt\n", machine().time().as_string(), machine().describe_context(), name().c_str(), tag().c_str(), m_pa7_dir ? "positive" : "negative", m_ie_edge ? "enable" : "disable"); } //------------------------------------------------- // live_start - //------------------------------------------------- void mos6530_base_t::live_start() { cur_live.period = attotime::from_ticks(m_prescale, clock()); cur_live.tm = machine().time() + attotime::from_hz(clock()); cur_live.state = RUNNING; cur_live.next_state = -1; cur_live.value = m_timer; checkpoint(); live_run(); } void mos6530_base_t::checkpoint() { checkpoint_live = cur_live; } void mos6530_base_t::rollback() { cur_live = checkpoint_live; } void mos6530_base_t::live_delay(int state) { cur_live.next_state = state; if(cur_live.tm != machine().time()) t_gen->adjust(cur_live.tm - machine().time()); else live_sync(); } void mos6530_base_t::live_sync() { if(!cur_live.tm.is_never()) { if(cur_live.tm > machine().time()) { rollback(); live_run(machine().time()); } else { if(cur_live.next_state != -1) { cur_live.state = cur_live.next_state; cur_live.next_state = -1; } if(cur_live.state == IDLE) { cur_live.tm = attotime::never; } } cur_live.next_state = -1; checkpoint(); } } void mos6530_base_t::live_abort() { if(!cur_live.tm.is_never() && cur_live.tm > machine().time()) { rollback(); live_run(machine().time()); } cur_live.tm = attotime::never; cur_live.state = IDLE; cur_live.next_state = -1; cur_live.tm_irq = attotime::never; } void mos6530_base_t::live_run(const attotime &limit) { if(cur_live.state == IDLE || cur_live.next_state != -1) return; for(;;) { switch(cur_live.state) { case RUNNING: { if (cur_live.tm > limit) return; cur_live.value--; if (cur_live.value == 0xff) { live_delay(RUNNING_SYNCPOINT); return; } else { if (LOG_TIMER) logerror("%s %s '%s' timer %02x\n", cur_live.tm.as_string(), name().c_str(), tag().c_str(), cur_live.value); cur_live.tm += cur_live.period; } break; } case RUNNING_SYNCPOINT: { if (LOG_TIMER) logerror("%s %s '%s' timer %02x interrupt\n", cur_live.tm.as_string(), name().c_str(), tag().c_str(), cur_live.value); cur_live.tm_irq = cur_live.tm; m_irq_timer = true; update_irq(); checkpoint(); cur_live.state = RUNNING_AFTER_INTERRUPT; cur_live.period = attotime::from_hz(clock()); cur_live.tm += cur_live.period; break; } case RUNNING_AFTER_INTERRUPT: { if (cur_live.tm > limit) return; cur_live.value--; if (LOG_TIMER) logerror("%s %s '%s' timer %02x\n", cur_live.tm.as_string(), name().c_str(), tag().c_str(), cur_live.value); if (!cur_live.value) { cur_live.state = IDLE; return; } cur_live.tm += cur_live.period; break; } } } }