Revert "emu_timer: undo prev commit, add running() getter and change some enabled() calls to that"

This reverts commit 957cfaa53d.

src/devices/bus/a2bus/a2pic.cpp

@@ -155,7 +155,7 @@ a2bus_pic_device::a2bus_pic_device(machine_config const &mconfig, char const *ta
 
 INPUT_CHANGED_MEMBER(a2bus_pic_device::sw1_strobe)
 {
-	m_printer_conn->write_strobe(BIT(m_input_sw1->read(), 3) ^ (m_strobe_timer->running() ? 0U : 1U));
+	m_printer_conn->write_strobe(BIT(m_input_sw1->read(), 3) ^ (m_strobe_timer->enabled() ? 0U : 1U));
 }
 
 
@@ -373,7 +373,7 @@ void a2bus_pic_device::device_reset()
 		m_printer_out->write(0x00U);
 	}
 
-	m_printer_conn->write_strobe(BIT(sw1, 3) ^ (m_strobe_timer->running() ? 0U : 1U));
+	m_printer_conn->write_strobe(BIT(sw1, 3) ^ (m_strobe_timer->enabled() ? 0U : 1U));
 
 	reset_mode();
 }
@@ -486,7 +486,7 @@ void a2bus_pic_device::data_write(s32 param)
 		ioport_value const sw1(m_input_sw1->read());
 		unsigned const cycles(15U - ((sw1 & 0x07U) << 1));
 		int const state(BIT(sw1, 3));
-		if (!m_strobe_timer->running())
+		if (!m_strobe_timer->enabled())
 		{
 			LOG("Output /STROBE=%d for %u cycles\n", state, cycles);
 			clear_ack_latch();
@@ -520,7 +520,7 @@ void a2bus_pic_device::reset_mode()
 
 void a2bus_pic_device::set_ack_latch()
 {
-	if (m_strobe_timer->running())
+	if (m_strobe_timer->enabled())
 	{
 		LOG("Active strobe prevents acknowledge latch from being set\n");
 	}

src/devices/bus/a2bus/grappler.cpp

@@ -785,7 +785,7 @@ void a2bus_grapplerplus_device::data_latched(u8 data)
 
 	// generate strobe pulse after one clock cycle
 	m_next_strobe = 0U;
-	if (!m_strobe_timer->running())
+	if (!m_strobe_timer->enabled())
 	{
 		LOG("Start strobe timer\n");
 		m_strobe_timer->adjust(attotime::from_ticks(7, clock()));

src/devices/bus/a2bus/uniprint.cpp

@@ -139,7 +139,7 @@ void a2bus_uniprint_device::write_c0nx(u8 offset, u8 data)
 
 	// generate strobe pulse after one clock cycle
 	m_next_strobe = 0U;
-	if (!m_strobe_timer->running())
+	if (!m_strobe_timer->enabled())
 	{
 		LOG("Start strobe timer\n");
 		m_strobe_timer->adjust(attotime::from_ticks(1, clock()));

src/devices/cpu/i86/i186.cpp

@@ -1330,7 +1330,7 @@ void i80186_cpu_device::internal_timer_sync(int which)
 	timer_state *t = &m_timer[which];
 
 	/* if we have a timing timer running, adjust the count */
-	if ((t->control & 0x8000) && !(t->control & 0x0c) && t->int_timer->running())
+	if ((t->control & 0x8000) && !(t->control & 0x0c) && t->int_timer->enabled())
 		t->count = ((t->control & 0x1000) ? t->maxB : t->maxA) - t->int_timer->remaining().as_ticks(clock() / 8);
 }
 
@@ -1450,7 +1450,7 @@ void i80186_cpu_device::internal_timer_update(int which, int new_count, int new_
 	/* update the interrupt timer */
 	if (update_int_timer)
 	{
-		if ((t->control & 0x8004) == 0x8000 && (!(t->control & 0x10) || t->int_timer->running()))
+		if ((t->control & 0x8004) == 0x8000 && (!(t->control & 0x10) || t->int_timer->enabled()))
 		{
 			int diff = ((t->control & 0x1000) ? t->maxB : t->maxA) - t->count;
 			if (diff <= 0)

src/devices/machine/chessmachine.cpp

@@ -126,7 +126,7 @@ void chessmachine_device::install_bootrom(bool enable)
 u32 chessmachine_device::disable_bootrom_r()
 {
 	// disconnect bootrom from the bus after next opcode
-	if (m_bootrom_enabled && !m_disable_bootrom->running() && !machine().side_effects_disabled())
+	if (m_bootrom_enabled && !m_disable_bootrom->enabled() && !machine().side_effects_disabled())
 		m_disable_bootrom->adjust(m_maincpu->cycles_to_attotime(5));
 
 	return 0;

src/devices/machine/cxd1185.cpp

@@ -172,7 +172,7 @@ u8 cxd1185_device::scsi_data_r()
 		{
 			data = m_fifo.dequeue();
 
-			if (m_state != IDLE && !m_state_timer->running())
+			if (m_state != IDLE && !m_state_timer->enabled())
 				m_state_timer->adjust(attotime::zero);
 		}
 		else
@@ -375,7 +375,7 @@ void cxd1185_device::scsi_data_w(u8 data)
 	{
 		m_fifo.enqueue(data);
 
-		if (m_state != IDLE && !m_state_timer->running())
+		if (m_state != IDLE && !m_state_timer->enabled())
 			m_state_timer->adjust(attotime::zero);
 	}
 	else

src/devices/machine/er1400.cpp

@@ -261,7 +261,7 @@ WRITE_LINE_MEMBER(er1400_device::c1_w)
 		return;
 
 	m_code_input = (m_code_input & 3) | (bool(state) << 2);
-	if (!m_data_propagation_timer->running())
+	if (!m_data_propagation_timer->enabled())
 		m_data_propagation_timer->adjust(attotime::from_usec(20));
 }
 
@@ -276,7 +276,7 @@ WRITE_LINE_MEMBER(er1400_device::c2_w)
 		return;
 
 	m_code_input = (m_code_input & 5) | (bool(state) << 1);
-	if (!m_data_propagation_timer->running())
+	if (!m_data_propagation_timer->enabled())
 		m_data_propagation_timer->adjust(attotime::from_usec(20));
 }
 
@@ -291,7 +291,7 @@ WRITE_LINE_MEMBER(er1400_device::c3_w)
 		return;
 
 	m_code_input = (m_code_input & 6) | bool(state);
-	if (!m_data_propagation_timer->running())
+	if (!m_data_propagation_timer->enabled())
 		m_data_propagation_timer->adjust(attotime::from_usec(20));
 }
 

src/devices/machine/i8155.cpp

@@ -116,7 +116,7 @@ inline uint8_t i8155_device::get_timer_mode() const
 
 inline uint16_t i8155_device::get_timer_count() const
 {
-	if (m_timer->running())
+	if (m_timer->enabled())
 	{
 		// timer counts down by twos
 		return std::min((uint16_t(attotime_to_clocks(m_timer->remaining())) + 1) << 1, m_count_loaded & 0x3ffe) | (m_count_even_phase ? 0 : 1);
@@ -139,12 +139,12 @@ inline void i8155_device::timer_output(int to)
 inline void i8155_device::timer_stop_count()
 {
 	// stop counting
-	if (m_timer->running())
+	if (m_timer->enabled())
 	{
 		m_count_loaded = (m_count_loaded & (TIMER_MODE_MASK << 8)) | get_timer_count();
-		m_timer->adjust(attotime::never);
+		m_timer->enable(false);
 	}
-	m_timer_tc->adjust(attotime::never);
+	m_timer_tc->enable(false);
 
 	// clear timer output
 	timer_output(1);
@@ -519,7 +519,7 @@ void i8155_device::write_command(uint8_t data)
 	case COMMAND_TM_START:
 		LOGMASKED(LOG_PORT, "Timer Command: Start\n");
 
-		if (m_timer->running())
+		if (m_timer->enabled())
 		{
 			// if timer is running, start the new mode and CNT length immediately after present TC is reached
 		}

src/devices/machine/ncr5380.cpp

@@ -168,7 +168,7 @@ void ncr5380_device::scsi_ctrl_changed()
 		}
 
 		m_state = IDLE;
-		m_state_timer->adjust(attotime::never);
+		m_state_timer->enable(false);
 
 		// clear scsi bus
 		scsi_bus->data_w(scsi_refid, 0);
@@ -182,7 +182,7 @@ void ncr5380_device::scsi_ctrl_changed()
 			if ((ctrl & S_PHASE_MASK) == (m_tcmd & TC_PHASE))
 			{
 				// transfer cycle
-				if (m_state != IDLE && !m_state_timer->running())
+				if (m_state != IDLE && !m_state_timer->enabled())
 					m_state_timer->adjust(attotime::zero);
 			}
 			else
@@ -190,7 +190,7 @@ void ncr5380_device::scsi_ctrl_changed()
 				LOG("phase mismatch %d != %d\n", (ctrl & S_PHASE_MASK), (m_tcmd & TC_PHASE));
 
 				m_state = IDLE;
-				m_state_timer->adjust(attotime::never);
+				m_state_timer->enable(false);
 
 				set_drq(true);
 				set_irq(true);
@@ -286,7 +286,7 @@ void ncr5380_device::mode_w(u8 data)
 	if ((m_mode & MODE_DMA) && !(data & MODE_DMA))
 	{
 		m_state = IDLE;
-		m_state_timer->adjust(attotime::never);
+		m_state_timer->enable(false);
 
 		m_bas &= ~BAS_ENDOFDMA;
 

src/devices/machine/timer.h

@@ -97,7 +97,6 @@ public:
 	}
 
 	// timing information
-	bool running() const { return m_timer->running(); }
 	attotime elapsed() const { return m_timer->elapsed(); }
 	attotime remaining() const { return m_timer->remaining(); }
 	attotime start() const { return m_timer->start(); }

src/devices/sound/c140.cpp

@@ -540,13 +540,13 @@ void c140_device::c140_w(offs_t offset, u8 data)
 		if (BIT(data, 0))
 		{
 			// kyukaidk and marvlandj want the first interrupt to happen immediately
-			if (!m_int1_timer->running())
+			if (!m_int1_timer->enabled())
 				m_int1_callback(ASSERT_LINE);
 		}
 		else
 		{
 			m_int1_callback(CLEAR_LINE);
-			m_int1_timer->adjust(attotime::never);
+			m_int1_timer->enable(false);
 		}
 	}
 }

src/devices/video/crtc_ega.cpp

@@ -228,7 +228,7 @@ void crtc_ega_device::update_counters()
 {
 	m_character_counter = m_line_timer->elapsed().as_ticks( m_clock );
 
-	if ( m_hsync_off_timer->running() )
+	if ( m_hsync_off_timer->enabled() )
 	{
 		m_hsync_width_counter = m_hsync_off_timer->elapsed().as_ticks( m_clock );
 	}
@@ -718,7 +718,7 @@ void crtc_ega_device::device_reset()
 	if(!m_res_out_irq_cb.isnull())
 		m_res_out_irq_cb(false);
 
-	if (!m_line_timer->running())
+	if (!m_line_timer->enabled())
 	{
 		m_line_timer->adjust( attotime::from_ticks( m_horiz_char_total + 2, m_clock ) );
 	}

src/devices/video/mc6845.cpp

@@ -689,7 +689,7 @@ void mc6845_device::update_counters()
 {
 	m_character_counter = attotime_to_cclks(m_line_timer->elapsed());
 
-	if (m_hsync_off_timer->running())
+	if (m_hsync_off_timer->enabled())
 	{
 		m_hsync_width_counter = attotime_to_cclks(m_hsync_off_timer->elapsed());
 	}
@@ -1560,7 +1560,7 @@ void mc6845_device::device_reset()
 
 	m_out_vsync_cb(false);
 
-	if (!m_line_timer->running())
+	if (!m_line_timer->enabled())
 		m_line_timer->adjust(cclks_to_attotime(m_horiz_char_total + 1));
 
 	m_light_pen_latched = false;

src/emu/schedule.cpp

@@ -152,7 +152,7 @@ void emu_timer::adjust(attotime start_delay, s32 param, const attotime &period)
 	// set the start and expire times
 	m_start = m_scheduler->time();
 	m_expire = m_start + start_delay;
-	m_enabled = true;
+	m_enabled = !m_expire.is_never();
 	m_period = period;
 
 	// remove and re-insert the timer in its new order

src/emu/schedule.h

@@ -50,7 +50,6 @@ public:
 	void adjust(attotime start_delay, s32 param = 0, const attotime &periodicity = attotime::never) noexcept;
 
 	// timing queries
-	bool running() const noexcept { return !m_expire.is_never(); }
 	attotime elapsed() const noexcept;
 	attotime remaining() const noexcept;
 	attotime start() const noexcept { return m_start; }

src/mame/apple/apple2e.cpp

@@ -2177,7 +2177,7 @@ void apple2e_state::laserprn_w(u8 data)
 
    // generate strobe pulse after one clock cycle
 	m_next_strobe = 0U;
-	if (!m_strobe_timer->running())
+	if (!m_strobe_timer->enabled())
 	{
 	   m_strobe_timer->adjust(attotime::from_hz(1021800));
 	}

src/mame/atari/atarist.cpp

@@ -1350,7 +1350,7 @@ TIMER_CALLBACK_MEMBER(ste_state::microwire_tick)
 		microwire_shift();
 		m_lmc1992->enable_w(1);
 		m_mw_shift = 0;
-		m_microwire_timer->adjust(attotime::never);
+		m_microwire_timer->enable(0);
 		break;
 	}
 }
@@ -1372,7 +1372,7 @@ uint16_t ste_state::microwire_data_r()
 
 void ste_state::microwire_data_w(uint16_t data)
 {
-	if (!m_microwire_timer->running())
+	if (!m_microwire_timer->enabled())
 	{
 		m_mw_data = data;
 		m_microwire_timer->adjust(attotime::zero, 0, attotime::from_usec(2));
@@ -1396,7 +1396,7 @@ uint16_t ste_state::microwire_mask_r()
 
 void ste_state::microwire_mask_w(uint16_t data)
 {
-	if (!m_microwire_timer->running())
+	if (!m_microwire_timer->enabled())
 	{
 		m_mw_mask = data;
 	}

src/mame/atari/atarivad.cpp

@@ -308,7 +308,7 @@ void atari_vad_device::internal_control_write(offs_t offset, uint16_t newword)
 
 		// set the scanline interrupt here
 		case 0x03:
-			if (oldword != newword || !m_scanline_int_timer->running())
+			if (oldword != newword || !m_scanline_int_timer->enabled())
 				m_scanline_int_timer->adjust(screen().time_until_pos(newword & 0x1ff));
 			break;
 

src/mame/chess/tasc.cpp

@@ -180,7 +180,7 @@ u32 tasc_state::input_r()
 	if (!machine().side_effects_disabled())
 	{
 		// disconnect bootrom from the bus after next opcode
-		if (m_bootrom_enabled && !m_disable_bootrom->running())
+		if (m_bootrom_enabled && !m_disable_bootrom->enabled())
 			m_disable_bootrom->adjust(m_maincpu->cycles_to_attotime(10));
 
 		m_maincpu->set_input_line(ARM_FIRQ_LINE, CLEAR_LINE);

src/mame/entex/advision.cpp

@@ -180,7 +180,7 @@ void advision_state::av_control_w(u8 data)
 
 	// disable led outputs (there is some delay before it takes effect)
 	// see for example codered twister and anime girl, gaps between the 'pixels' should be visible but minimal
-	if (m_video_bank == 0 && !m_led_off->running())
+	if (m_video_bank == 0 && !m_led_off->enabled())
 		m_led_off->adjust(attotime::from_usec(39));
 
 	// P24 rising edge: transfer led latches to outputs
@@ -239,7 +239,7 @@ TIMER_DEVICE_CALLBACK_MEMBER(advision_state::led_off)
 READ_LINE_MEMBER(advision_state::vsync_r)
 {
 	// T1: mirror sync pulse (half rotation)
-	return (m_mirror_sync->running()) ? 0 : 1;
+	return (m_mirror_sync->enabled()) ? 0 : 1;
 }
 
 

src/mame/fidelity/cc1.cpp

@@ -150,7 +150,7 @@ u8 cc1_state::ppi_porta_r()
 	data |= ~m_inputs[1]->read() << 5 & 0xe0;
 
 	// d4: 555 Q
-	return data | ((m_delay->running()) ? 0x10 : 0);
+	return data | ((m_delay->enabled()) ? 0x10 : 0);
 }
 
 void cc1_state::ppi_portb_w(u8 data)
@@ -163,7 +163,7 @@ void cc1_state::ppi_portb_w(u8 data)
 void cc1_state::ppi_portc_w(u8 data)
 {
 	// d6: trigger monostable 555 (R=15K, C=1uF)
-	if (~data & m_led_select & 0x40 && !m_delay->running())
+	if (~data & m_led_select & 0x40 && !m_delay->enabled())
 		m_delay->adjust(attotime::from_msec(17));
 
 	// d0-d3: digit select

src/mame/fidelity/cc10.cpp

@@ -126,7 +126,7 @@ void ccx_state::update_display()
 void ccx_state::ppi_porta_w(u8 data)
 {
 	// d7: enable beeper on falling edge (556 monostable) (unpopulated on ACR)
-	if (m_beeper != nullptr && ~data & m_7seg_data & 0x80 && !m_beeper_off->running())
+	if (m_beeper != nullptr && ~data & m_7seg_data & 0x80 && !m_beeper_off->enabled())
 	{
 		m_beeper->set_state(1);
 		m_beeper_off->adjust(attotime::from_msec(80)); // duration is approximate

src/mame/handheld/hh_cop400.cpp

@@ -1263,7 +1263,7 @@ CUSTOM_INPUT_MEMBER(mbaskb2_state::switch_r)
 {
 	// The power switch is off-1-2, and the game relies on power-on starting at 1,
 	// otherwise msoccer2 boots up to what looks like a factory test mode.
-	return (m_inputs[3]->read() & 1) | (m_on_timer->running() ? 1 : 0);
+	return (m_inputs[3]->read() & 1) | (m_on_timer->enabled() ? 1 : 0);
 }
 
 static INPUT_PORTS_START( mbaskb2 )

src/mame/handheld/hh_tms1k.cpp

@@ -1560,7 +1560,7 @@ u8 cchime_state::read_k()
 	inp |= m_inputs[2]->read() << 1 & 4;
 
 	// K8: tempo knob state
-	if (m_tempo_timer->running())
+	if (m_tempo_timer->enabled())
 		inp |= 8;
 
 	return inp;
@@ -5490,7 +5490,7 @@ u8 mmarvin_state::read_k()
 {
 	// K1-K4: multiplexed inputs
 	// K8: speed knob state
-	return (read_inputs(4) & 7) | (m_speed_timer->running() ? 0 : 8);
+	return (read_inputs(4) & 7) | (m_speed_timer->enabled() ? 0 : 8);
 }
 
 // config

src/mame/hegenerglaser/modular.cpp

@@ -245,7 +245,7 @@ u8 mmodular_state::bavaria2_r()
 
 	// d7: busy signal
 	// other: unused?
-	return m_bav_busy->running() ? 0x80 : 0;
+	return m_bav_busy->enabled() ? 0x80 : 0;
 }
 
 

src/mame/konami/asterix.cpp

@@ -66,7 +66,7 @@ void asterix_state::sound_arm_nmi_w(uint8_t data)
 
 void asterix_state::z80_nmi_w(int state)
 {
-	if (state && !m_nmi_blocked->running())
+	if (state && !m_nmi_blocked->enabled())
 		m_audiocpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE);
 }
 

src/mame/konami/parodius.cpp

@@ -209,7 +209,7 @@ void parodius_state::sound_arm_nmi_w(uint8_t data)
 
 void parodius_state::z80_nmi_w(int state)
 {
-	if (state && !m_nmi_blocked->running())
+	if (state && !m_nmi_blocked->enabled())
 		m_audiocpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE);
 }
 

src/mame/konami/rollerg.cpp

@@ -175,7 +175,7 @@ void rollerg_state::sound_arm_nmi_w(uint8_t data)
 
 void rollerg_state::z80_nmi_w(int state)
 {
-	if (state && !m_nmi_blocked->running())
+	if (state && !m_nmi_blocked->enabled())
 		m_audiocpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE);
 }
 

src/mame/konami/simpsons.cpp

@@ -177,7 +177,7 @@ void simpsons_state::z80_arm_nmi_w(uint8_t data)
 
 void simpsons_state::z80_nmi_w(int state)
 {
-	if (state && !m_nmi_blocked->running())
+	if (state && !m_nmi_blocked->enabled())
 		m_audiocpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE);
 }
 

src/mame/konami/vendetta.cpp

@@ -344,7 +344,7 @@ void vendetta_state::z80_arm_nmi_w(uint8_t data)
 
 void vendetta_state::z80_nmi_w(int state)
 {
-	if (state && !m_nmi_blocked->running())
+	if (state && !m_nmi_blocked->enabled())
 		m_audiocpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE);
 }
 

src/mame/mess.flt

@@ -589,7 +589,6 @@ olympiaint/peoplepc.cpp
 omnibyte/msbc1.cpp
 omnibyte/ob68k1a.cpp
 omron/luna_68k.cpp
-omron/luna_88k.cpp
 openuni/hektor.cpp
 osborne/osbexec.cpp
 osborne/osborne1.cpp

src/mame/miltonbradley/microvsn.cpp

@@ -295,7 +295,7 @@ u8 microvision_state::tms1100_k_r()
 
 	// K8: paddle capacitor
 	if (m_paddle_on)
-		data |= (m_paddle_timer->running() ? 0 : BIT(m_r, 2)) << 3;
+		data |= (m_paddle_timer->enabled() ? 0 : BIT(m_r, 2)) << 3;
 
 	return data;
 }
@@ -390,7 +390,7 @@ READ_LINE_MEMBER(microvision_state::i8021_t1_r)
 {
 	// T1: paddle capacitor (active low)
 	int active = (m_p2 & 0xc) ? 1 : 0;
-	active |= m_paddle_timer->running() ? 1 : 0;
+	active |= m_paddle_timer->enabled() ? 1 : 0;
 	return (m_paddle_on) ? active : 1;
 }
 

src/mame/saitek/risc2500.cpp

@@ -229,7 +229,7 @@ void risc2500_state::install_bootrom(bool enable)
 u32 risc2500_state::disable_boot_rom_r()
 {
 	// disconnect bootrom from the bus after next opcode
-	if (m_bootrom_enabled && !m_disable_bootrom->running() && !machine().side_effects_disabled())
+	if (m_bootrom_enabled && !m_disable_bootrom->enabled() && !machine().side_effects_disabled())
 		m_disable_bootrom->adjust(m_maincpu->cycles_to_attotime(10));
 
 	return 0;

src/mame/sgi/hpc3.cpp

@@ -524,7 +524,7 @@ void hpc3_device::hd_enet_w(offs_t offset, uint32_t data, uint32_t mem_mask)
 		else
 			m_enet_tx_ctrl = (m_enet_tx_ctrl & (TXC_LC | TXC_ST)) | (data & ~((TXC_LC | TXC_ST)));
 
-		if ((m_enet_tx_ctrl & TXC_CA) && !m_enet_tx_timer->running())
+		if ((m_enet_tx_ctrl & TXC_CA) && !m_enet_tx_timer->enabled())
 			m_enet_tx_timer->adjust(attotime::zero);
 		break;
 	case 0x7008/4:

src/mame/shared/efo_zsu.cpp

@@ -203,7 +203,7 @@ WRITE_LINE_MEMBER(efo_zsu_device::ctc0_z2_w)
 
 WRITE_LINE_MEMBER(efo_zsu_device::fifo_dor_w)
 {
-	if (!m_fifo_shift_timer->running())
+	if (!m_fifo_shift_timer->enabled())
 		m_ctc[0]->trg3(!state);
 }
 

src/mame/televideo/tv955kb.cpp

@@ -65,7 +65,7 @@ void tv955kb_device::bell_reset()
 {
 	m_bell_on = false;
 	m_bell->level_w(0);
-	m_bell_timer->adjust(attotime::never);
+	m_bell_timer->enable(false);
 }
 
 WRITE_LINE_MEMBER(tv955kb_device::write_rxd)
@@ -88,9 +88,9 @@ u8 tv955kb_device::keys_r()
 
 WRITE_LINE_MEMBER(tv955kb_device::bell_w)
 {
-	if (state && m_bell_timer->running())
+	if (state && m_bell_timer->enabled())
 		bell_reset();
-	else if (!state && !m_bell_timer->running())
+	else if (!state && !m_bell_timer->enabled())
 	{
 		// Speaker driven through 2N4401 from Q8 output of MC14040 clocked by ALE
 		attotime period = m_mcu->cycles_to_attotime(128);

src/mame/tiger/k28.cpp

@@ -184,7 +184,7 @@ u8 k28_state::mcu_p1_r()
 			data |= m_inputs[i]->read();
 
 			// force press on-button at boot
-			if (i == 5 && m_onbutton_timer->running())
+			if (i == 5 && m_onbutton_timer->enabled())
 				data |= 1;
 		}