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diff --git a/src/mame/drivers/esqkt.c b/src/mame/drivers/esqkt.c
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+// license:BSD-3-Clause
+// copyright-holders:R. Belmont
+/***************************************************************************
+
+ esqkt.c - Ensoniq KT-76, KT-88, and E-Prime
+
+ Driver by R. Belmont
+
+ Hardware:
+ CPU: 68EC020-16 CPU
+ Serial/timers: SCN2681 (MC68681 clone)
+ Sound: 2xES5506
+ Effects: ES5510
+
+ Memory map:
+
+ 0x000000-0x07FFFF OS ROM
+ 0x200000-0x20003F Master ES5506
+ 0x240000-0x24003F Slave ES5506
+ 0x280000-0x2801FF ES5510
+ 0x300000-0x30000F 68681 DUART
+ 0xFF0000-0xFFFFFF OS RAM
+
+ Ensoniq KT-76
+ Ensoniq 1994
+
+ This is a wavetable-based synth keyboard made by Ensoniq in 1994
+
+ PCB Layout
+ ----------
+
+ KT-76
+ |---------------------------------------------|
+ |J12 J3 J11 J10 |
+ | LM393 LM358|
+ | 74HC4051|
+ |ADM691 |
+ | 62256 |
+ | |
+ |3V_BATTERY KT76_0590_LO.U5 ROM0 |
+ | |
+ | 68EC020 62256 OTTOR2 ROM1 |
+ | |
+ | KT76_690B_HI.U6 ROM2 |
+ | PAL1 |
+ | HP_6N138 |
+ | PAL2 OTTOR2 J6|
+ | 7407 |
+ | |
+ | D41464 D41464 |
+ | |
+ | SCN2681 D41464 D41464 |
+ | 137000402 |
+ | |
+ | 18.432MHz |
+ | ESPR6 16MHz |
+ | POT |
+ | R1136-11 |
+ | |
+ | LM339 LM339 |
+ | J13 J5 J1 J2 J4 |
+ |---------------------------------------------|
+ Notes:
+ J1 - connector for digital jacks
+ J2 - connector for keyboard
+ J3 - connector for LCD display
+ J4 - connector for keyboard
+ J5 - connector for power input
+ J6 - connector for wave expansion
+ J10 - connector for wheels/pressure
+ J11 - connector for memory card
+ J12 - connector for headphones
+ J13 - connector for analog jacks
+ 68EC020 - Motorola MC68EC020FG16 CPU. Clock input 16MHz
+ 1370000402 - Unknown PLCC44 IC stamped with the Ensoniq logo. Likely CPLD or gate array.
+ ESPR6 - Ensoniq ESPR6 (ES5510) sound chip
+ OTTOR2 - Ensoniq OTTOR2 (ES5506) sound chip
+ POT - ESP adjustment pot
+ KT76* - 27C2048/27C210 EPROM
+ ROM* - 2M x8-bit SOP44 mask ROM
+ R1136-11 - DIP40 IC manufactured by Rockwell - believed to be some type of MCU.
+ D41464 - NEC D41464 64k x4-bit DRAM
+ 62256 - 32k x8-bit SRAM
+ SCN2681 - Philips SCN2681 Dual Universal Asynchronous Receiver/Transmitter (DUART)
+ HP_6N138 - HP/Agilent HP 6N138 Low Input Current High Gain Optocoupler
+ PAL1 - MMI PAL20L8ACN stamped 'KT-76 MMU 6A0A'. Printing is faint so 0 could be a B or a D.
+ PAL2 - MMI PAL20L8ACN stamped 'KT-76 BCU 73D6'
+
+***************************************************************************/
+
+#include "bus/midi/midi.h"
+#include "cpu/m68000/m68000.h"
+#include "cpu/es5510/es5510.h"
+#include "sound/es5506.h"
+#include "machine/mc68681.h"
+#include "machine/esqpanel.h"
+
+class esqkt_state : public driver_device
+{
+public:
+ esqkt_state(const machine_config &mconfig, device_type type, const char *tag)
+ : driver_device(mconfig, type, tag),
+ m_maincpu(*this, "maincpu"),
+ m_esp(*this, "esp"),
+ m_duart(*this, "duart"),
+ m_sq1panel(*this, "sq1panel"),
+ m_mdout(*this, "mdout")
+ { }
+
+ required_device<m68ec020_device> m_maincpu;
+ required_device<es5510_device> m_esp;
+ required_device<mc68681_device> m_duart;
+ required_device<esqpanel2x40_sq1_device> m_sq1panel;
+ required_device<midi_port_device> m_mdout;
+
+ virtual void machine_reset();
+
+ DECLARE_WRITE_LINE_MEMBER(duart_irq_handler);
+ DECLARE_WRITE_LINE_MEMBER(duart_tx_a);
+ DECLARE_WRITE_LINE_MEMBER(duart_tx_b);
+ DECLARE_WRITE8_MEMBER(duart_output);
+
+ UINT8 m_duart_io;
+ bool m_bCalibSecondByte;
+
+private:
+ UINT32 *m_rom, *m_ram;
+
+public:
+ DECLARE_DRIVER_INIT(kt);
+ DECLARE_INPUT_CHANGED_MEMBER(key_stroke);
+ DECLARE_WRITE_LINE_MEMBER(esq5506_otto_irq);
+ DECLARE_READ16_MEMBER(esq5506_read_adc);
+};
+
+void esqkt_state::machine_reset()
+{
+ m_bCalibSecondByte = false;
+}
+
+static ADDRESS_MAP_START( kt_map, AS_PROGRAM, 32, esqkt_state )
+ AM_RANGE(0x000000, 0x07ffff) AM_ROM AM_REGION("osrom", 0)
+ AM_RANGE(0x200000, 0x20003f) AM_DEVREADWRITE8("ensoniq", es5506_device, read, write, 0xffffffff)
+ AM_RANGE(0x240000, 0x24003f) AM_DEVREADWRITE8("ensoniq2", es5506_device, read, write, 0xffffffff)
+ AM_RANGE(0x280000, 0x2801ff) AM_DEVREADWRITE8("esp", es5510_device, host_r, host_w, 0xffffffff)
+ AM_RANGE(0x300000, 0x30001f) AM_DEVREADWRITE8("duart", mc68681_device, read, write, 0xffffffff)
+ AM_RANGE(0xff0000, 0xffffff) AM_RAM AM_SHARE("osram")
+ADDRESS_MAP_END
+
+WRITE_LINE_MEMBER(esqkt_state::esq5506_otto_irq)
+{
+ #if 0 // 5505/06 IRQ generation needs (more) work
+ m_maincpu->set_input_line(1, state);
+ #endif
+}
+
+READ16_MEMBER(esqkt_state::esq5506_read_adc)
+{
+ switch ((m_duart_io & 7) ^ 7)
+ {
+ case 0: // vRef to check battery
+ return 0x5b00;
+
+ case 2: // battery voltage
+ return 0x7f00;
+
+ default: // pedal
+ return 0;
+ }
+
+ if (m_duart_io & 1)
+ {
+ return 0x5b00; // vRef
+ }
+ else
+ {
+ return 0x7f00; // vBattery
+ }
+}
+
+WRITE_LINE_MEMBER(esqkt_state::duart_irq_handler)
+{
+ m_maincpu->set_input_line(M68K_IRQ_3, state);
+}
+
+WRITE8_MEMBER(esqkt_state::duart_output)
+{
+ m_duart_io = data;
+
+// printf("DUART output: %02x (PC=%x)\n", data, m_maincpu->pc());
+}
+
+WRITE_LINE_MEMBER(esqkt_state::duart_tx_a)
+{
+ m_mdout->write_txd(state);
+}
+
+WRITE_LINE_MEMBER(esqkt_state::duart_tx_b)
+{
+ m_sq1panel->rx_w(state);
+}
+
+static MACHINE_CONFIG_START( kt, esqkt_state )
+ MCFG_CPU_ADD("maincpu", M68EC020, XTAL_16MHz)
+ MCFG_CPU_PROGRAM_MAP(kt_map)
+
+ MCFG_CPU_ADD("esp", ES5510, XTAL_10MHz)
+ MCFG_DEVICE_DISABLE()
+
+ MCFG_ESQPANEL2x40_SQ1_ADD("sq1panel")
+ MCFG_ESQPANEL_TX_CALLBACK(DEVWRITELINE("duart", mc68681_device, rx_b_w))
+
+ MCFG_MC68681_ADD("duart", 4000000)
+ MCFG_MC68681_IRQ_CALLBACK(WRITELINE(esqkt_state, duart_irq_handler))
+ MCFG_MC68681_A_TX_CALLBACK(WRITELINE(esqkt_state, duart_tx_a))
+ MCFG_MC68681_B_TX_CALLBACK(WRITELINE(esqkt_state, duart_tx_b))
+ MCFG_MC68681_OUTPORT_CALLBACK(WRITE8(esqkt_state, duart_output))
+ MCFG_MC68681_SET_EXTERNAL_CLOCKS(500000, 500000, 1000000, 1000000)
+ MCFG_MC68681_SET_EXTERNAL_CLOCKS(500000, 500000, 1000000, 1000000)
+
+ MCFG_MIDI_PORT_ADD("mdin", midiin_slot, "midiin")
+ MCFG_MIDI_RX_HANDLER(DEVWRITELINE("duart", mc68681_device, rx_a_w)) // route MIDI Tx send directly to 68681 channel A Rx
+
+ MCFG_MIDI_PORT_ADD("mdout", midiout_slot, "midiout")
+
+ MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
+ MCFG_SOUND_ADD("ensoniq", ES5506, XTAL_16MHz)
+ MCFG_ES5506_REGION0("waverom") /* Bank 0 */
+ MCFG_ES5506_REGION1("waverom2") /* Bank 1 */
+ MCFG_ES5506_REGION2("waverom3") /* Bank 0 */
+ MCFG_ES5506_REGION3("waverom4") /* Bank 1 */
+ MCFG_ES5506_CHANNELS(1) /* channels */
+ MCFG_ES5506_IRQ_CB(WRITELINE(esqkt_state, esq5506_otto_irq)) /* irq */
+ MCFG_ES5506_READ_PORT_CB(READ16(esqkt_state, esq5506_read_adc))
+ MCFG_SOUND_ROUTE(0, "lspeaker", 0.5)
+ MCFG_SOUND_ROUTE(1, "rspeaker", 0.5)
+ MCFG_SOUND_ADD("ensoniq2", ES5506, XTAL_16MHz)
+ MCFG_ES5506_REGION0("waverom") /* Bank 0 */
+ MCFG_ES5506_REGION1("waverom2") /* Bank 1 */
+ MCFG_ES5506_REGION2("waverom3") /* Bank 0 */
+ MCFG_ES5506_REGION3("waverom4") /* Bank 1 */
+ MCFG_ES5506_CHANNELS(1) /* channels */
+ MCFG_SOUND_ROUTE(0, "lspeaker", 0.5)
+ MCFG_SOUND_ROUTE(1, "rspeaker", 0.5)
+MACHINE_CONFIG_END
+
+static INPUT_PORTS_START( kt )
+INPUT_PORTS_END
+
+ROM_START( kt76 )
+ ROM_REGION(0x80000, "osrom", 0)
+ ROM_LOAD32_WORD( "kt76_162_lo.bin", 0x000000, 0x020000, CRC(1a1ab910) SHA1(dcc80db2297fd25993e090c2e5bb7f947319a8bf) )
+ ROM_LOAD32_WORD( "kt76_162_hi.bin", 0x000002, 0x040000, CRC(de16d236) SHA1(c55fca86453e90e8c34a048bed45817063237370) )
+
+ ROM_REGION(0x400000, "waverom", ROMREGION_ERASE00)
+ ROM_LOAD16_BYTE( "1351000401_rom0.u103", 0x000001, 0x200000, CRC(425047af) SHA1(9680d1fc222b29ba24f0fbf6136982bee87a60ef) )
+
+ ROM_REGION(0x400000, "waverom2", ROMREGION_ERASE00)
+ ROM_LOAD16_BYTE( "1351000402_rom1.u102", 0x000001, 0x200000, CRC(64459185) SHA1(0fa20b16847fc02a384057fc3d385226eb3e7527) )
+
+ ROM_REGION(0x400000, "waverom3", ROMREGION_ERASE00)
+ ROM_LOAD16_BYTE( "1351000403_rom2.u104", 0x000001, 0x200000, CRC(c2aacc5d) SHA1(7fab518ba92ddb23cdc4dcb04751b26d25c298c0) )
+
+ ROM_REGION(0x200000, "waverom4", ROMREGION_ERASE00)
+ROM_END
+
+DRIVER_INIT_MEMBER(esqkt_state, kt)
+{
+ m_duart_io = 0;
+}
+
+CONS( 1996, kt76, 0, 0, kt, kt, esqkt_state, kt, "Ensoniq", "KT-76", MACHINE_IMPERFECT_SOUND )