diff --git a/src/devices/bus/isa/dectalk.cpp b/src/devices/bus/isa/dectalk.cpp
index cae8f8733f3..08641ec392c 100644
--- a/src/devices/bus/isa/dectalk.cpp
+++ b/src/devices/bus/isa/dectalk.cpp
@@ -93,7 +93,7 @@ WRITE16_MEMBER(dectalk_isa_device::dsp_dma_w)
 	m_dsp_dma = data;
 }
 
-READ16_MEMBER(dectalk_isa_device::bio_line_r)
+READ_LINE_MEMBER(dectalk_isa_device::bio_line_r)
 {
 	// TODO: reading the bio line doesn't cause any direct external effects so this is wrong
 	if(m_bio == ASSERT_LINE)
@@ -129,7 +129,6 @@ ADDRESS_MAP_END
 static ADDRESS_MAP_START(dectalk_dsp_io, AS_IO, 16, dectalk_isa_device)
 	AM_RANGE(0x0, 0x0) AM_READ(dsp_dma_r)
 	AM_RANGE(0x1, 0x1) AM_READWRITE(dsp_dma_r, dac_w)
-	AM_RANGE(TMS32010_BIO, TMS32010_BIO) AM_READ(bio_line_r)
 ADDRESS_MAP_END
 
 static ADDRESS_MAP_START(dectalk_dsp_map, AS_PROGRAM, 16, dectalk_isa_device)
@@ -144,6 +143,7 @@ static MACHINE_CONFIG_FRAGMENT( dectalk_isa )
 
 	MCFG_CPU_ADD("dectalk_dsp", TMS32015, XTAL_20MHz)
 	MCFG_CPU_IO_MAP(dectalk_dsp_io)
+	MCFG_TMS32010_BIO_IN_CB(READLINE(dectalk_isa_device, bio_line_r))
 	MCFG_CPU_PROGRAM_MAP(dectalk_dsp_map)
 
 	MCFG_SPEAKER_STANDARD_MONO("speaker")
diff --git a/src/devices/bus/isa/dectalk.h b/src/devices/bus/isa/dectalk.h
index 5d9d11f44ca..2f65fc88c67 100644
--- a/src/devices/bus/isa/dectalk.h
+++ b/src/devices/bus/isa/dectalk.h
@@ -33,7 +33,7 @@ public:
 	DECLARE_READ16_MEMBER(dsp_dma_r);
 	DECLARE_WRITE16_MEMBER(dsp_dma_w);
 	DECLARE_WRITE16_MEMBER(output_ctl_w);
-	DECLARE_READ16_MEMBER(bio_line_r);
+	DECLARE_READ_LINE_MEMBER(bio_line_r);
 	DECLARE_WRITE16_MEMBER(irq_line_w);
 	DECLARE_WRITE_LINE_MEMBER(clock_w);
 
diff --git a/src/devices/cpu/tms32010/tms32010.cpp b/src/devices/cpu/tms32010/tms32010.cpp
index ab49c52b603..7625ff96646 100644
--- a/src/devices/cpu/tms32010/tms32010.cpp
+++ b/src/devices/cpu/tms32010/tms32010.cpp
@@ -71,7 +71,6 @@
 #define M_RDOP_ARG(A)   TMS32010_RDOP_ARG(A)
 #define P_IN(A)         TMS32010_In(A)
 #define P_OUT(A,V)      TMS32010_Out(A,V)
-#define BIO_IN          TMS32010_BIO_In
 
 
 const device_type TMS32010 = &device_creator<tms32010_device>;
@@ -102,7 +101,8 @@ tms32010_device::tms32010_device(const machine_config &mconfig, const char *tag,
 	: cpu_device(mconfig, TMS32010, "TMS32010", tag, owner, clock, "tms32010", __FILE__)
 	, m_program_config("program", ENDIANNESS_BIG, 16, 12, -1)
 	, m_data_config("data", ENDIANNESS_BIG, 16, 8, -1, ADDRESS_MAP_NAME(tms32010_ram))
-	, m_io_config("io", ENDIANNESS_BIG, 16, 4+1, -1)
+	, m_io_config("io", ENDIANNESS_BIG, 16, 4, -1)
+	, m_bio_in(*this)
 	, m_addr_mask(0x0fff)
 {
 }
@@ -112,7 +112,8 @@ tms32010_device::tms32010_device(const machine_config &mconfig, device_type type
 	: cpu_device(mconfig, type, name, tag, owner, clock, shortname, source)
 	, m_program_config("program", ENDIANNESS_BIG, 16, 12, -1)
 	, m_data_config("data", ENDIANNESS_BIG, 16, 8, -1, ADDRESS_MAP_NAME(tms32015_ram))
-	, m_io_config("io", ENDIANNESS_BIG, 16, 4+1, -1)
+	, m_io_config("io", ENDIANNESS_BIG, 16, 4, -1)
+	, m_bio_in(*this)
 	, m_addr_mask(addr_mask)
 {
 }
@@ -157,14 +158,6 @@ offs_t tms32010_device::disasm_disassemble(char *buffer, offs_t pc, const UINT8
 #define IND     (m_AR[ARP] & 0xff)              /* address used in indirect memory access operations */
 
 
-
-/****************************************************************************
- *  Read the state of the BIO pin
- */
-
-#define TMS32010_BIO_In (m_io->read_word(TMS32010_BIO<<1))
-
-
 /****************************************************************************
  *  Input a word from given I/O port
  */
@@ -448,7 +441,7 @@ void tms32010_device::bgz()
 }
 void tms32010_device::bioz()
 {
-	if (BIO_IN != CLEAR_LINE) {
+	if (m_bio_in() != CLEAR_LINE) {
 		m_PC = M_RDOP_ARG(m_PC);
 		m_icount -= add_branch_cycle();
 	}
@@ -842,6 +835,8 @@ void tms32010_device::device_start()
 	m_data = &space(AS_DATA);
 	m_io = &space(AS_IO);
 
+	m_bio_in.resolve_safe(0);
+
 	m_PREVPC = 0;
 	m_ALU.d = 0;
 	m_Preg.d = 0;
diff --git a/src/devices/cpu/tms32010/tms32010.h b/src/devices/cpu/tms32010/tms32010.h
index b7d77827a09..61e36279e17 100644
--- a/src/devices/cpu/tms32010/tms32010.h
+++ b/src/devices/cpu/tms32010/tms32010.h
@@ -18,13 +18,8 @@
 
 
 
-/****************************************************************************
- * Use this in the I/O port address fields of your driver for the BIO pin
- * i.e,
- *  AM_RANGE(TMS32010_BIO, TMS32010_BIO) AM_READ(twincobr_bio_line_r)
- */
-
-#define TMS32010_BIO            0x10        /* BIO input */
+#define MCFG_TMS32010_BIO_IN_CB(_devcb) \
+	devcb = &tms32010_device::set_bio_in_cb(*device, DEVCB_##_devcb); /* BIO input  */
 
 
 #define TMS32010_INT_PENDING    0x80000000
@@ -50,6 +45,9 @@ public:
 	// construction/destruction
 	tms32010_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
 	tms32010_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source, int addr_mask);
+	
+	// static configuration helpers
+	template<class _Object> static devcb_base & set_bio_in_cb(device_t &device, _Object object) { return downcast<tms32010_device &>(device).m_bio_in.set_callback(object); }
 
 protected:
 	// device-level overrides
@@ -80,6 +78,8 @@ private:
 	address_space_config m_program_config;
 	address_space_config m_data_config;
 	address_space_config m_io_config;
+	
+	devcb_read_line m_bio_in;
 
 	typedef void ( tms32010_device::*opcode_func ) ();
 	struct tms32010_opcode
diff --git a/src/devices/sound/bsmt2000.cpp b/src/devices/sound/bsmt2000.cpp
index 2741f447fb5..00850252503 100644
--- a/src/devices/sound/bsmt2000.cpp
+++ b/src/devices/sound/bsmt2000.cpp
@@ -2,7 +2,7 @@
 // copyright-holders:Aaron Giles
 /***************************************************************************
 
-    bsmt2000.c
+    bsmt2000.cpp
 
     BSMT2000 device emulator.
 
@@ -39,7 +39,6 @@ static ADDRESS_MAP_START( tms_io_map, AS_IO, 16, bsmt2000_device)
 	AM_RANGE(2, 2) AM_READ(tms_rom_r)
 	AM_RANGE(3, 3) AM_WRITE(tms_left_w)
 	AM_RANGE(7, 7) AM_WRITE(tms_right_w)
-	AM_RANGE(TMS32010_BIO, TMS32010_BIO) AM_READ(tms_write_pending_r)
 ADDRESS_MAP_END
 
 
@@ -49,6 +48,7 @@ static MACHINE_CONFIG_FRAGMENT( bsmt2000 )
 	MCFG_CPU_PROGRAM_MAP(tms_program_map)
 	// data map is internal to the CPU
 	MCFG_CPU_IO_MAP(tms_io_map)
+	MCFG_TMS32010_BIO_IN_CB(READLINE(bsmt2000_device, tms_write_pending_r))
 MACHINE_CONFIG_END
 
 
@@ -352,7 +352,7 @@ WRITE16_MEMBER( bsmt2000_device::tms_right_w )
 //  on the TMS32015
 //-------------------------------------------------
 
-READ16_MEMBER( bsmt2000_device::tms_write_pending_r )
+READ_LINE_MEMBER( bsmt2000_device::tms_write_pending_r )
 {
 	return m_write_pending ? 1 : 0;
 }
diff --git a/src/devices/sound/bsmt2000.h b/src/devices/sound/bsmt2000.h
index 9c1470278b7..befd8619d2d 100644
--- a/src/devices/sound/bsmt2000.h
+++ b/src/devices/sound/bsmt2000.h
@@ -76,7 +76,7 @@ public:
 	DECLARE_WRITE16_MEMBER( tms_rom_bank_w );
 	DECLARE_WRITE16_MEMBER( tms_left_w );
 	DECLARE_WRITE16_MEMBER( tms_right_w );
-	DECLARE_READ16_MEMBER( tms_write_pending_r );
+	DECLARE_READ_LINE_MEMBER( tms_write_pending_r );
 
 private:
 	// timers
diff --git a/src/mame/audio/harddriv.cpp b/src/mame/audio/harddriv.cpp
index c629eb7f32c..f45c4755fea 100644
--- a/src/mame/audio/harddriv.cpp
+++ b/src/mame/audio/harddriv.cpp
@@ -299,7 +299,7 @@ WRITE16_MEMBER(harddriv_sound_board_device::hdsnd68k_320com_w)
  *
  *************************************/
 
-READ16_MEMBER(harddriv_sound_board_device::hdsnddsp_get_bio)
+READ_LINE_MEMBER(harddriv_sound_board_device::hdsnddsp_get_bio)
 {
 	UINT64 cycles_since_last_bio = m_sounddsp->total_cycles() - m_last_bio_cycles;
 	INT32 cycles_until_bio = CYCLES_PER_BIO - cycles_since_last_bio;
@@ -307,7 +307,7 @@ READ16_MEMBER(harddriv_sound_board_device::hdsnddsp_get_bio)
 	/* if we're not at the next BIO yet, advance us there */
 	if (cycles_until_bio > 0)
 	{
-		space.device().execute().adjust_icount(-cycles_until_bio);
+		m_sounddsp->adjust_icount(-cycles_until_bio);
 		m_last_bio_cycles += CYCLES_PER_BIO;
 	}
 	else
@@ -421,7 +421,6 @@ static ADDRESS_MAP_START( driversnd_dsp_io_map, AS_IO, 16, harddriv_sound_board_
 	AM_RANGE(4, 4) AM_WRITE(hdsnddsp_mute_w)
 	AM_RANGE(5, 5) AM_WRITE(hdsnddsp_gen68kirq_w)
 	AM_RANGE(6, 7) AM_WRITE(hdsnddsp_soundaddr_w)
-	AM_RANGE(TMS32010_BIO, TMS32010_BIO) AM_READ(hdsnddsp_get_bio)
 ADDRESS_MAP_END
 
 
@@ -435,6 +434,7 @@ static MACHINE_CONFIG_FRAGMENT( harddriv_snd )
 	MCFG_CPU_PROGRAM_MAP(driversnd_dsp_program_map)
 	/* Data Map is internal to the CPU */
 	MCFG_CPU_IO_MAP(driversnd_dsp_io_map)
+	MCFG_TMS32010_BIO_IN_CB(READLINE(harddriv_sound_board_device, hdsnddsp_get_bio))
 
 	/* sound hardware */
 	MCFG_SPEAKER_STANDARD_MONO("mono")
diff --git a/src/mame/drivers/atarisy4.cpp b/src/mame/drivers/atarisy4.cpp
index 78af3c1417c..923c091b070 100644
--- a/src/mame/drivers/atarisy4.cpp
+++ b/src/mame/drivers/atarisy4.cpp
@@ -86,11 +86,11 @@ public:
 	DECLARE_WRITE16_MEMBER(m68k_shared_1_w);
 	DECLARE_READ16_MEMBER(dsp0_status_r);
 	DECLARE_WRITE16_MEMBER(dsp0_control_w);
-	DECLARE_READ16_MEMBER(dsp0_bio_r);
+	DECLARE_READ_LINE_MEMBER(dsp0_bio_r);
 	DECLARE_WRITE16_MEMBER(dsp0_bank_w);
 	DECLARE_READ16_MEMBER(dsp1_status_r);
 	DECLARE_WRITE16_MEMBER(dsp1_control_w);
-	DECLARE_READ16_MEMBER(dsp1_bio_r);
+	DECLARE_READ_LINE_MEMBER(dsp1_bio_r);
 	DECLARE_WRITE16_MEMBER(dsp1_bank_w);
 	DECLARE_READ16_MEMBER(analog_r);
 	DECLARE_DRIVER_INIT(airrace);
@@ -601,7 +601,7 @@ WRITE16_MEMBER(atarisy4_state::dsp0_control_w)
 	m_csr[0] = data;
 }
 
-READ16_MEMBER(atarisy4_state::dsp0_bio_r)
+READ_LINE_MEMBER(atarisy4_state::dsp0_bio_r)
 {
 	return BIT(m_csr[0], 2);
 }
@@ -635,7 +635,7 @@ WRITE16_MEMBER(atarisy4_state::dsp1_control_w)
 	m_csr[1] = data;
 }
 
-READ16_MEMBER(atarisy4_state::dsp1_bio_r)
+READ_LINE_MEMBER(atarisy4_state::dsp1_bio_r)
 {
 	return BIT(m_csr[1], 2);
 }
@@ -692,7 +692,6 @@ ADDRESS_MAP_END
 
 static ADDRESS_MAP_START( dsp0_io_map, AS_IO, 16, atarisy4_state )
 	AM_RANGE(0x00, 0x01) AM_WRITE(dsp0_bank_w)
-	AM_RANGE(TMS32010_BIO, TMS32010_BIO) AM_READ(dsp0_bio_r)
 ADDRESS_MAP_END
 
 
@@ -710,7 +709,6 @@ ADDRESS_MAP_END
 
 static ADDRESS_MAP_START( dsp1_io_map, AS_IO, 16, atarisy4_state )
 	AM_RANGE(0x00, 0x01) AM_WRITE(dsp1_bank_w)
-	AM_RANGE(TMS32010_BIO, TMS32010_BIO) AM_READ(dsp1_bio_r)
 ADDRESS_MAP_END
 
 
@@ -766,6 +764,7 @@ static MACHINE_CONFIG_START( atarisy4, atarisy4_state )
 	MCFG_CPU_ADD("dsp0", TMS32010, 16000000)
 	MCFG_CPU_PROGRAM_MAP(dsp0_map)
 	MCFG_CPU_IO_MAP(dsp0_io_map)
+	MCFG_TMS32010_BIO_IN_CB(READLINE(atarisy4_state, dsp0_bio_r))
 
 
 	MCFG_SCREEN_ADD("screen", RASTER)
@@ -781,6 +780,7 @@ static MACHINE_CONFIG_DERIVED( airrace, atarisy4 )
 	MCFG_CPU_ADD("dsp1", TMS32010, 16000000)
 	MCFG_CPU_PROGRAM_MAP(dsp1_map)
 	MCFG_CPU_IO_MAP(dsp1_io_map)
+	MCFG_TMS32010_BIO_IN_CB(READLINE(atarisy4_state, dsp1_bio_r))
 
 	MCFG_MACHINE_RESET_OVERRIDE(atarisy4_state,airrace)
 MACHINE_CONFIG_END
diff --git a/src/mame/drivers/coolpool.cpp b/src/mame/drivers/coolpool.cpp
index a4d0209c6aa..866690da7f5 100644
--- a/src/mame/drivers/coolpool.cpp
+++ b/src/mame/drivers/coolpool.cpp
@@ -214,7 +214,7 @@ WRITE16_MEMBER(coolpool_state::amerdart_misc_w)
 	m_dsp->set_input_line(INPUT_LINE_RESET, (data & 0x0400) ? ASSERT_LINE : CLEAR_LINE);
 }
 
-READ16_MEMBER(coolpool_state::amerdart_dsp_bio_line_r)
+READ_LINE_MEMBER(coolpool_state::amerdart_dsp_bio_line_r)
 {
 	/* Skip idle checking */
 	if (m_old_cmd == m_cmd_pending)
@@ -225,7 +225,7 @@ READ16_MEMBER(coolpool_state::amerdart_dsp_bio_line_r)
 	if (m_same_cmd_count >= 5)
 	{
 		m_same_cmd_count = 5;
-		space.device().execute().spin();
+		m_dsp->spin();
 	}
 	m_old_cmd = m_cmd_pending;
 
@@ -664,7 +664,6 @@ static ADDRESS_MAP_START( amerdart_dsp_io_map, AS_IO, 16, coolpool_state )
 	AM_RANGE(0x05, 0x05) AM_READ_PORT("IN0")
 	AM_RANGE(0x06, 0x06) AM_READ(amerdart_trackball_r)
 	AM_RANGE(0x07, 0x07) AM_READ(amerdart_dsp_cmd_r)
-	AM_RANGE(TMS32010_BIO, TMS32010_BIO) AM_READ(amerdart_dsp_bio_line_r)
 ADDRESS_MAP_END
 
 
@@ -799,6 +798,7 @@ static MACHINE_CONFIG_START( amerdart, coolpool_state )
 	MCFG_CPU_PROGRAM_MAP(amerdart_dsp_pgm_map)
 	/* Data Map is internal to the CPU */
 	MCFG_CPU_IO_MAP(amerdart_dsp_io_map)
+	MCFG_TMS32010_BIO_IN_CB(READLINE(coolpool_state, amerdart_dsp_bio_line_r))
 	MCFG_TIMER_DRIVER_ADD_SCANLINE("audioint", coolpool_state, amerdart_audio_int_gen, "screen", 0, 1)
 
 	MCFG_MACHINE_RESET_OVERRIDE(coolpool_state,amerdart)
diff --git a/src/mame/drivers/dectalk.cpp b/src/mame/drivers/dectalk.cpp
index 5f6a9b8cba2..1bf72ecced5 100644
--- a/src/mame/drivers/dectalk.cpp
+++ b/src/mame/drivers/dectalk.cpp
@@ -328,7 +328,7 @@ public:
 	DECLARE_WRITE16_MEMBER(spc_latch_outfifo_error_stats);
 	DECLARE_READ16_MEMBER(spc_infifo_data_r);
 	DECLARE_WRITE16_MEMBER(spc_outfifo_data_w);
-	DECLARE_READ16_MEMBER(spc_semaphore_r);
+	DECLARE_READ_LINE_MEMBER(spc_semaphore_r);
 	DECLARE_DRIVER_INIT(dectalk);
 	virtual void machine_reset() override;
 	TIMER_CALLBACK_MEMBER(outfifo_read_cb);
@@ -735,7 +735,7 @@ WRITE16_MEMBER(dectalk_state::spc_outfifo_data_w)
 	//dectalk_outfifo_check(); // outfifo check should only be done in the audio 10khz polling function
 }
 
-READ16_MEMBER(dectalk_state::spc_semaphore_r)// Return state of d-latch 74ls74 @ E64 'lower half' in d0 which indicates whether infifo is readable
+READ_LINE_MEMBER(dectalk_state::spc_semaphore_r)// Return state of d-latch 74ls74 @ E64 'lower half' in d0 which indicates whether infifo is readable
 {
 #ifdef SPC_LOG_DSP
 	//logerror("dsp: read infifo semaphore, returned %d\n", m_infifo_semaphore); // commented due to extreme annoyance factor
@@ -793,7 +793,6 @@ ADDRESS_MAP_END
 static ADDRESS_MAP_START(tms32010_io, AS_IO, 16, dectalk_state )
 	AM_RANGE(0, 0) AM_WRITE(spc_latch_outfifo_error_stats) // *set* the outfifo_status_r semaphore, and also latch the error bit at D0.
 	AM_RANGE(1, 1) AM_READWRITE(spc_infifo_data_r, spc_outfifo_data_w) //read from input fifo, write to sound fifo
-	AM_RANGE(TMS32010_BIO, TMS32010_BIO) AM_READ(spc_semaphore_r) //read infifo-has-data-in-it fifo readable status
 	//AM_RANGE(8, 8) //the newer firmware seems to want something mapped here?
 ADDRESS_MAP_END
 
@@ -877,6 +876,7 @@ static MACHINE_CONFIG_START( dectalk, dectalk_state )
 	MCFG_CPU_ADD("dsp", TMS32010, XTAL_20MHz) /* Y1 20MHz xtal */
 	MCFG_CPU_PROGRAM_MAP(tms32010_mem)
 	MCFG_CPU_IO_MAP(tms32010_io)
+	MCFG_TMS32010_BIO_IN_CB(READLINE(dectalk_state, spc_semaphore_r)) //read infifo-has-data-in-it fifo readable status
 #ifdef USE_LOOSE_TIMING
 	MCFG_QUANTUM_TIME(attotime::from_hz(100))
 #else
diff --git a/src/mame/drivers/toaplan1.cpp b/src/mame/drivers/toaplan1.cpp
index d9177645c16..2bae7de4e7c 100644
--- a/src/mame/drivers/toaplan1.cpp
+++ b/src/mame/drivers/toaplan1.cpp
@@ -933,7 +933,6 @@ static ADDRESS_MAP_START( DSP_io_map, AS_IO, 16, toaplan1_state )
 	AM_RANGE(0, 0) AM_WRITE(demonwld_dsp_addrsel_w)
 	AM_RANGE(1, 1) AM_READWRITE(demonwld_dsp_r, demonwld_dsp_w)
 	AM_RANGE(3, 3) AM_WRITE(demonwld_dsp_bio_w)
-	AM_RANGE(TMS32010_BIO, TMS32010_BIO) AM_READ(demonwld_BIO_r)
 ADDRESS_MAP_END
 
 
@@ -1979,6 +1978,7 @@ static MACHINE_CONFIG_START( demonwld, toaplan1_state )
 	MCFG_CPU_ADD("dsp", TMS32010, XTAL_28MHz/2)
 	MCFG_CPU_PROGRAM_MAP(DSP_program_map)
 	MCFG_CPU_IO_MAP(DSP_io_map)
+	MCFG_TMS32010_BIO_IN_CB(READLINE(toaplan1_state, demonwld_BIO_r))
 
 	MCFG_QUANTUM_TIME(attotime::from_hz(600))
 
diff --git a/src/mame/drivers/tomcat.cpp b/src/mame/drivers/tomcat.cpp
index fec676031c2..78d6280c427 100644
--- a/src/mame/drivers/tomcat.cpp
+++ b/src/mame/drivers/tomcat.cpp
@@ -78,11 +78,9 @@ public:
 	DECLARE_WRITE16_MEMBER(tomcat_irqclr_w);
 	DECLARE_READ16_MEMBER(tomcat_inputs2_r);
 	DECLARE_READ16_MEMBER(tomcat_320bio_r);
-	DECLARE_READ16_MEMBER(dsp_BIO_r);
-	DECLARE_READ16_MEMBER(tomcat_shared_ram_r);
-	DECLARE_WRITE16_MEMBER(tomcat_shared_ram_w);
 	DECLARE_READ8_MEMBER(tomcat_nvram_r);
 	DECLARE_WRITE8_MEMBER(tomcat_nvram_w);
+	DECLARE_READ_LINE_MEMBER(dsp_BIO_r);
 	DECLARE_WRITE8_MEMBER(soundlatches_w);
 	virtual void machine_start() override;
 	required_device<cpu_device> m_maincpu;
@@ -232,9 +230,9 @@ READ16_MEMBER(tomcat_state::tomcat_320bio_r)
 	return 0;
 }
 
-READ16_MEMBER(tomcat_state::dsp_BIO_r)
+READ_LINE_MEMBER(tomcat_state::dsp_BIO_r)
 {
-	if ( space.device().safe_pc() == 0x0001 )
+	if ( m_dsp->pc() == 0x0001 )
 	{
 		if ( m_dsp_idle == 0 )
 		{
@@ -243,7 +241,7 @@ READ16_MEMBER(tomcat_state::dsp_BIO_r)
 		}
 		return !m_dsp_BIO;
 	}
-	else if ( space.device().safe_pc() == 0x0003 )
+	else if ( m_dsp->pc() == 0x0003 )
 	{
 		if ( m_dsp_BIO == 1 )
 		{
@@ -264,16 +262,6 @@ READ16_MEMBER(tomcat_state::dsp_BIO_r)
 	}
 }
 
-READ16_MEMBER(tomcat_state::tomcat_shared_ram_r)
-{
-	return m_shared_ram[offset];
-}
-
-WRITE16_MEMBER(tomcat_state::tomcat_shared_ram_w)
-{
-	COMBINE_DATA(&m_shared_ram[offset]);
-}
-
 READ8_MEMBER(tomcat_state::tomcat_nvram_r)
 {
 	return m_nvram[offset];
@@ -308,7 +296,7 @@ static ADDRESS_MAP_START( tomcat_map, AS_PROGRAM, 16, tomcat_state )
 	AM_RANGE(0x40e01c, 0x40e01d) AM_WRITE(tomcat_ackh_w)
 	AM_RANGE(0x40e01e, 0x40e01f) AM_WRITE(tomcat_txbuffh_w)
 	AM_RANGE(0x800000, 0x803fff) AM_RAM AM_SHARE("vectorram")
-	AM_RANGE(0xffa000, 0xffbfff) AM_READWRITE(tomcat_shared_ram_r, tomcat_shared_ram_w)
+	AM_RANGE(0xffa000, 0xffbfff) AM_RAM AM_SHARE("shared_ram")
 	AM_RANGE(0xffc000, 0xffcfff) AM_RAM
 	AM_RANGE(0xffd000, 0xffdfff) AM_DEVREADWRITE8("m48t02", timekeeper_device, read, write, 0xff00)
 	AM_RANGE(0xffd000, 0xffdfff) AM_READWRITE8(tomcat_nvram_r, tomcat_nvram_w, 0x00ff)
@@ -318,9 +306,6 @@ static ADDRESS_MAP_START( dsp_map, AS_PROGRAM, 16, tomcat_state )
 	AM_RANGE(0x0000, 0x0fff) AM_RAM AM_SHARE("shared_ram")
 ADDRESS_MAP_END
 
-static ADDRESS_MAP_START( dsp_io_map, AS_IO, 16, tomcat_state )
-	AM_RANGE(TMS32010_BIO, TMS32010_BIO) AM_READ(dsp_BIO_r)
-ADDRESS_MAP_END
 
 WRITE8_MEMBER(tomcat_state::soundlatches_w)
 {
@@ -391,7 +376,7 @@ static MACHINE_CONFIG_START( tomcat, tomcat_state )
 
 	MCFG_CPU_ADD("dsp", TMS32010, XTAL_16MHz)
 	MCFG_CPU_PROGRAM_MAP( dsp_map)
-	MCFG_CPU_IO_MAP( dsp_io_map)
+	MCFG_TMS32010_BIO_IN_CB(READLINE(tomcat_state, dsp_BIO_r))
 
 	MCFG_CPU_ADD("soundcpu", M6502, XTAL_14_31818MHz / 8 )
 	MCFG_DEVICE_DISABLE()
diff --git a/src/mame/drivers/twincobr.cpp b/src/mame/drivers/twincobr.cpp
index 91ea4263f49..680f57d0734 100644
--- a/src/mame/drivers/twincobr.cpp
+++ b/src/mame/drivers/twincobr.cpp
@@ -449,7 +449,6 @@ static ADDRESS_MAP_START( DSP_io_map, AS_IO, 16, twincobr_state )
 	AM_RANGE(1, 1) AM_READWRITE(twincobr_dsp_r, twincobr_dsp_w)
 	AM_RANGE(2, 2) AM_READWRITE(fsharkbt_dsp_r, fsharkbt_dsp_w)
 	AM_RANGE(3, 3) AM_WRITE(twincobr_dsp_bio_w)
-	AM_RANGE(TMS32010_BIO, TMS32010_BIO) AM_READ(twincobr_BIO_r)
 ADDRESS_MAP_END
 
 
@@ -669,6 +668,7 @@ static MACHINE_CONFIG_START( twincobr, twincobr_state )
 	MCFG_CPU_PROGRAM_MAP(DSP_program_map)
 	/* Data Map is internal to the CPU */
 	MCFG_CPU_IO_MAP(DSP_io_map)
+	MCFG_TMS32010_BIO_IN_CB(READLINE(twincobr_state, twincobr_BIO_r))
 
 	MCFG_QUANTUM_TIME(attotime::from_hz(6000))
 
diff --git a/src/mame/drivers/wardner.cpp b/src/mame/drivers/wardner.cpp
index da4e7c078b7..c8fb9684c25 100644
--- a/src/mame/drivers/wardner.cpp
+++ b/src/mame/drivers/wardner.cpp
@@ -232,7 +232,6 @@ static ADDRESS_MAP_START( DSP_io_map, AS_IO, 16, wardner_state )
 	AM_RANGE(0x00, 0x00) AM_WRITE(wardner_dsp_addrsel_w)
 	AM_RANGE(0x01, 0x01) AM_READWRITE(wardner_dsp_r, wardner_dsp_w)
 	AM_RANGE(0x03, 0x03) AM_WRITE(twincobr_dsp_bio_w)
-	AM_RANGE(TMS32010_BIO, TMS32010_BIO) AM_READ(twincobr_BIO_r)
 ADDRESS_MAP_END
 
 
@@ -384,6 +383,7 @@ static MACHINE_CONFIG_START( wardner, wardner_state )
 	MCFG_CPU_PROGRAM_MAP(DSP_program_map)
 	/* Data Map is internal to the CPU */
 	MCFG_CPU_IO_MAP(DSP_io_map)
+	MCFG_TMS32010_BIO_IN_CB(READLINE(wardner_state, twincobr_BIO_r))
 
 	MCFG_QUANTUM_TIME(attotime::from_hz(6000))      /* 100 CPU slices per frame */
 
diff --git a/src/mame/includes/coolpool.h b/src/mame/includes/coolpool.h
index 6730f624cba..622f46dbe30 100644
--- a/src/mame/includes/coolpool.h
+++ b/src/mame/includes/coolpool.h
@@ -46,7 +46,7 @@ public:
 	DECLARE_WRITE16_MEMBER(nvram_data_w);
 	DECLARE_WRITE16_MEMBER(nvram_thrash_data_w);
 	DECLARE_WRITE16_MEMBER(amerdart_misc_w);
-	DECLARE_READ16_MEMBER(amerdart_dsp_bio_line_r);
+	DECLARE_READ_LINE_MEMBER(amerdart_dsp_bio_line_r);
 	DECLARE_READ16_MEMBER(amerdart_iop_r);
 	DECLARE_WRITE16_MEMBER(amerdart_iop_w);
 	DECLARE_READ16_MEMBER(amerdart_dsp_cmd_r);
diff --git a/src/mame/includes/harddriv.h b/src/mame/includes/harddriv.h
index 95dccfd57b2..58a430885bf 100644
--- a/src/mame/includes/harddriv.h
+++ b/src/mame/includes/harddriv.h
@@ -479,7 +479,7 @@ public:
 	DECLARE_WRITE16_MEMBER(hdsnd68k_320ports_w);
 	DECLARE_READ16_MEMBER(hdsnd68k_320com_r);
 	DECLARE_WRITE16_MEMBER(hdsnd68k_320com_w);
-	DECLARE_READ16_MEMBER(hdsnddsp_get_bio);
+	DECLARE_READ_LINE_MEMBER(hdsnddsp_get_bio);
 
 	DECLARE_WRITE16_MEMBER(hdsnddsp_dac_w);
 	DECLARE_WRITE16_MEMBER(hdsnddsp_comport_w);
diff --git a/src/mame/includes/toaplan1.h b/src/mame/includes/toaplan1.h
index 7c67523b40a..e5366a7d123 100644
--- a/src/mame/includes/toaplan1.h
+++ b/src/mame/includes/toaplan1.h
@@ -89,7 +89,7 @@ public:
 	DECLARE_READ16_MEMBER(demonwld_dsp_r);
 	DECLARE_WRITE16_MEMBER(demonwld_dsp_w);
 	DECLARE_WRITE16_MEMBER(demonwld_dsp_bio_w);
-	DECLARE_READ16_MEMBER(demonwld_BIO_r);
+	DECLARE_READ_LINE_MEMBER(demonwld_BIO_r);
 	DECLARE_WRITE16_MEMBER(demonwld_dsp_ctrl_w);
 	DECLARE_READ16_MEMBER(samesame_port_6_word_r);
 	DECLARE_READ16_MEMBER(vimana_system_port_r);
diff --git a/src/mame/includes/twincobr.h b/src/mame/includes/twincobr.h
index 6f6c603af24..d6b7af85e9e 100644
--- a/src/mame/includes/twincobr.h
+++ b/src/mame/includes/twincobr.h
@@ -68,7 +68,7 @@ public:
 	DECLARE_WRITE16_MEMBER(twincobr_dsp_bio_w);
 	DECLARE_READ16_MEMBER(fsharkbt_dsp_r);
 	DECLARE_WRITE16_MEMBER(fsharkbt_dsp_w);
-	DECLARE_READ16_MEMBER(twincobr_BIO_r);
+	DECLARE_READ_LINE_MEMBER(twincobr_BIO_r);
 	DECLARE_WRITE16_MEMBER(twincobr_control_w);
 	DECLARE_WRITE8_MEMBER(wardner_control_w);
 	DECLARE_READ16_MEMBER(twincobr_sharedram_r);
diff --git a/src/mame/machine/asic65.cpp b/src/mame/machine/asic65.cpp
index 3ad34f5e32a..58b46fda1fb 100644
--- a/src/mame/machine/asic65.cpp
+++ b/src/mame/machine/asic65.cpp
@@ -516,10 +516,10 @@ READ16_MEMBER( asic65_device::stat_r )
 }
 
 
-READ16_MEMBER( asic65_device::get_bio )
+READ_LINE_MEMBER( asic65_device::get_bio )
 {
 	if (!m_tfull)
-		space.device().execute().spin_until_interrupt();
+		m_ourcpu->spin_until_interrupt();
 	return m_tfull ? CLEAR_LINE : ASSERT_LINE;
 }
 
@@ -539,7 +539,6 @@ ADDRESS_MAP_END
 static ADDRESS_MAP_START( asic65_io_map, AS_IO, 16, asic65_device )
 	AM_RANGE(0, 0) AM_MIRROR(6) AM_READWRITE(m68k_r, m68k_w)
 	AM_RANGE(1, 1) AM_MIRROR(6) AM_READWRITE(stat_r, stat_w)
-	AM_RANGE(TMS32010_BIO, TMS32010_BIO) AM_READ(get_bio)
 ADDRESS_MAP_END
 
 
@@ -556,6 +555,7 @@ MACHINE_CONFIG_FRAGMENT( asic65 )
 	MCFG_CPU_ADD("asic65cpu", TMS32010, 20000000)
 	MCFG_CPU_PROGRAM_MAP(asic65_program_map)
 	MCFG_CPU_IO_MAP(asic65_io_map)
+	MCFG_TMS32010_BIO_IN_CB(READLINE(asic65_device, get_bio))
 MACHINE_CONFIG_END
 
 //-------------------------------------------------
diff --git a/src/mame/machine/asic65.h b/src/mame/machine/asic65.h
index c5f094461a2..0f481e2b6c0 100644
--- a/src/mame/machine/asic65.h
+++ b/src/mame/machine/asic65.h
@@ -28,11 +28,11 @@ public:
 	DECLARE_READ16_MEMBER( read );
 	DECLARE_READ16_MEMBER( io_r );
 
-	WRITE16_MEMBER( m68k_w );
-	READ16_MEMBER( m68k_r );
-	WRITE16_MEMBER( stat_w );
-	READ16_MEMBER( stat_r );
-	READ16_MEMBER( get_bio );
+	DECLARE_WRITE16_MEMBER( m68k_w );
+	DECLARE_READ16_MEMBER( m68k_r );
+	DECLARE_WRITE16_MEMBER( stat_w );
+	DECLARE_READ16_MEMBER( stat_r );
+	DECLARE_READ_LINE_MEMBER( get_bio );
 
 	enum
 	{
diff --git a/src/mame/machine/toaplan1.cpp b/src/mame/machine/toaplan1.cpp
index 7c3f201af08..ef87079267d 100644
--- a/src/mame/machine/toaplan1.cpp
+++ b/src/mame/machine/toaplan1.cpp
@@ -121,7 +121,7 @@ WRITE16_MEMBER(toaplan1_state::demonwld_dsp_bio_w)
 	}
 }
 
-READ16_MEMBER(toaplan1_state::demonwld_BIO_r)
+READ_LINE_MEMBER(toaplan1_state::demonwld_BIO_r)
 {
 	return m_dsp_BIO;
 }
diff --git a/src/mame/machine/twincobr.cpp b/src/mame/machine/twincobr.cpp
index 26bf4cec699..c6c0bbdac10 100644
--- a/src/mame/machine/twincobr.cpp
+++ b/src/mame/machine/twincobr.cpp
@@ -170,7 +170,7 @@ WRITE16_MEMBER(twincobr_state::fsharkbt_dsp_w)
 #endif
 }
 
-READ16_MEMBER(twincobr_state::twincobr_BIO_r)
+READ_LINE_MEMBER(twincobr_state::twincobr_BIO_r)
 {
 	return m_dsp_BIO;
 }