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Diffstat (limited to 'src/mame/drivers/acrnsys.cpp')
-rw-r--r-- | src/mame/drivers/acrnsys.cpp | 591 |
1 files changed, 591 insertions, 0 deletions
diff --git a/src/mame/drivers/acrnsys.cpp b/src/mame/drivers/acrnsys.cpp new file mode 100644 index 00000000000..51e0e338001 --- /dev/null +++ b/src/mame/drivers/acrnsys.cpp @@ -0,0 +1,591 @@ +// license:BSD-3-Clause +// copyright-holders:Robbbert, Nigel Barnes +/*************************************************************************** + + Acorn System 2, 3, 4, and 5 + + Acorn System 2: 6502, VDU 40x25, 4K RAM, 4K ROM (BASIC), Cassette + http://chrisacorns.computinghistory.org.uk/Computers/System2.html + + Acorn System 3: 6502, VDU 40x25, 16K RAM, 4K ROM (BASIC), FDC (1 disc) + http://chrisacorns.computinghistory.org.uk/Computers/System3.html + + Acorn System 3: 6809, VDU 40x25, 16K RAM, FDC (1 disc) + http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/Acorn_6809_CPU.html + + Acorn System 4: 6502, VDU 40x25, 16K RAM, FDC (2 discs) + http://chrisacorns.computinghistory.org.uk/Computers/System4.html + + Acorn System 5: 6502A, VDU 80x25, 32K RAM, FDC + http://chrisacorns.computinghistory.org.uk/Computers/System5.html + + TODO: + - AY-3-4572 Keyboard Encoder for full keyboard support + - 4K BASIC ROM is undumped for System 2/3 + + + 6809 Monitor Commands:- + Modify memory: + M - Modify starting at specified address + MR - Modify registers + MG - Modify from Go address + MV - Modify from breakpoint address + MP - Modify from saved Program counter + + Execute programs: + G - Go to specified address + P - Proceed from saved Program counter past specified number of breakpoints + + Debugging aids: + R - Display registers + V - Insert/delete breakpoint + T - Trace one, or more, instructions + . - Do trace, displaying register contents at each step + + Cassette interface: + S - Save memory to named file + L - Load named file, with optional offset + F - Finish loading - no name search + + Printer interface: + C - Copy to parallel printer + + Disk interface: + D - Disk bootstrap + +****************************************************************************/ + +#include "emu.h" +#include "cpu/m6502/m6502.h" +#include "cpu/m6809/m6809.h" +#include "machine/ins8154.h" +#include "machine/6522via.h" +#include "machine/keyboard.h" +#include "machine/input_merger.h" +#include "bus/centronics/ctronics.h" +#include "bus/acorn/bus.h" +#include "softlist_dev.h" + + +class acrnsys_state : public driver_device +{ +public: + acrnsys_state(const machine_config &mconfig, device_type type, const char *tag) + : driver_device(mconfig, type, tag) + , m_maincpu(*this, "maincpu") + , m_irqs(*this, "irqs") + , m_bus(*this, "bus") + , m_ins8154(*this, "ins8154") + , m_via6522(*this, "via6522") + , m_centronics(*this, "centronics") + , m_kbd_data(0) + { } + + DECLARE_INPUT_CHANGED_MEMBER(trigger_reset); + + void a6502(machine_config &config); + void a6809(machine_config &config); + void a6502a(machine_config &config); + + void acrnsys2(machine_config &config); + void acrnsys3(machine_config &config); + void acrnsys3_6809(machine_config &config); + void acrnsys4(machine_config &config); + void acrnsys5(machine_config &config); + +protected: + virtual void machine_start() override; + virtual void machine_reset() override; + +private: + void kbd_put(u8 data); + void kbd_put_pb(u8 data); + + DECLARE_READ8_MEMBER(kbd_r); + DECLARE_WRITE_LINE_MEMBER(bus_nmi_w); + + void a6502_mem(address_map &map); + void a6809_mem(address_map &map); + void a6502a_mem(address_map &map); + + required_device<cpu_device> m_maincpu; + required_device<input_merger_device> m_irqs; + required_device<acorn_bus_device> m_bus; + optional_device<ins8154_device> m_ins8154; + optional_device<via6522_device> m_via6522; + optional_device<centronics_device> m_centronics; + + uint8_t m_kbd_data; +}; + + +void acrnsys_state::a6502_mem(address_map &map) +{ + map.unmap_value_low(); + map(0x0000, 0x03ff).ram(); + map(0x0e00, 0x0e7f).mirror(0x100).rw(m_ins8154, FUNC(ins8154_device::ins8154_r), FUNC(ins8154_device::ins8154_w)); + map(0xf000, 0xffff).rom().region("maincpu", 0); +} + +void acrnsys_state::a6809_mem(address_map &map) +{ + map.unmap_value_high(); + map(0x0000, 0x03ff).ram(); + map(0x0900, 0x090f).mirror(0xf0).rw(m_via6522, FUNC(via6522_device::read), FUNC(via6522_device::write)); + map(0xf800, 0xffff).rom().region("maincpu", 0); +} + +void acrnsys_state::a6502a_mem(address_map &map) +{ + map.unmap_value_low(); + map(0x0000, 0x07ff).ram(); + map(0x0e00, 0x0e0f).mirror(0x1f0).rw(m_via6522, FUNC(via6522_device::read), FUNC(via6522_device::write)); + map(0xe000, 0xffff).rom().region("maincpu", 0); +} + + +void acrnsys_state::machine_start() +{ + save_item(NAME(m_kbd_data)); +} + +void acrnsys_state::machine_reset() +{ + m_kbd_data = 0x7f; +} + + +WRITE_LINE_MEMBER(acrnsys_state::bus_nmi_w) +{ + m_maincpu->set_input_line(INPUT_LINE_NMI, state); +} + + +INPUT_CHANGED_MEMBER(acrnsys_state::trigger_reset) +{ + m_maincpu->set_input_line(INPUT_LINE_RESET, newval ? CLEAR_LINE : ASSERT_LINE); + + if (newval) + { + machine().schedule_soft_reset(); + } +} + +/*************************************************************************** + Acorn Keyboard - Part No. 400,013 +***************************************************************************/ + +static INPUT_PORTS_START( acrnsys ) +//PORT_START("X0") +//PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("L SHIFT") PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1) +//PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("R SHIFT") PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1) +//PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("SHIFT LOCK") PORT_CODE(KEYCODE_LALT) +//PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("CTRL") PORT_CODE(KEYCODE_LCONTROL) PORT_CHAR(UCHAR_MAMEKEY(LCONTROL)) +//PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x30, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!') +// +//PORT_START("X1") +//PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("ESC") PORT_CODE(KEYCODE_TILDE) PORT_CHAR(UCHAR_MAMEKEY(ESC)) +//PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('\"') +//PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W') +//PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q') +//PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S') +//PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A') +//PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z') +// +//PORT_START("X2") +//PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$') +//PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#') +//PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R') +//PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E') +//PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D') +//PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X') +//PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C') +// +//PORT_START("X3") +//PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%') +//PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T') +//PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F') +//PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G') +//PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V') +//PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B') +// +//PORT_START("X4") +//PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&') +//PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y') +//PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H') +//PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N') +//PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("SPACE") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(32) +// +//PORT_START("X5") +//PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'') +//PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U') +//PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J') +//PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K') +//PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M') +//PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<') + +//PORT_START("X6") +//PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(') +//PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I') +//PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O') +//PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L') +//PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED) +// +//PORT_START("X7") +//PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')') +//PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P') +//PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>') +// +//PORT_START("X8") +//PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR('+') +//PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?') +//PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED) +// +//PORT_START("X9") +//PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR(':') PORT_CHAR('*') +//PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("COPY") PORT_CODE(KEYCODE_TAB) PORT_CHAR(UCHAR_MAMEKEY(TAB)) +// +//PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("LINE FEED") PORT_CODE(KEYCODE_INSERT) PORT_CHAR(10) +//PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR('[') +//PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("RETURN") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13) +//PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR(']') +// +//PORT_START("X10") +//PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("DELETE") PORT_CODE(KEYCODE_DEL) PORT_CHAR(8) +//PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('@') +//PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME(UTF8_UP) PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR('^') +//PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR('\\') +// +//PORT_START("X11") +//PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('=') +//PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED) +// +//PORT_START("X12") +//PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED) +//PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0') +// +//PORT_START("CAPS") +//PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("LOCK") PORT_CODE(KEYCODE_CAPSLOCK) PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK)) PORT_TOGGLE +// +//PORT_START("RPT") +//PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("REPT") PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_MAMEKEY(RCONTROL)) + + PORT_START("BRK") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("BREAK") PORT_CODE(KEYCODE_F12) PORT_CHAR(UCHAR_MAMEKEY(F12)) PORT_CHANGED_MEMBER(DEVICE_SELF, acrnsys_state, trigger_reset, 0) +INPUT_PORTS_END + + +void acrnsys_state::kbd_put(uint8_t data) +{ + data &= 0x7f; + /* allow backspace to work */ + if (data == 8) data = 0x7f; + /* assert strobe */ + m_kbd_data = data | 0x80; +} + +READ8_MEMBER(acrnsys_state::kbd_r) +{ + uint8_t data = m_kbd_data; + + /* clear strobe */ + m_kbd_data &= 0x7f; + + return data; +} + +void acrnsys_state::kbd_put_pb(uint8_t data) +{ + data &= 0x7f; + /* allow backspace to work */ + if (data == 8) data = 0x7f; + + m_via6522->write_pb0(BIT(data, 0)); + m_via6522->write_pb1(BIT(data, 1)); + m_via6522->write_pb2(BIT(data, 2)); + m_via6522->write_pb3(BIT(data, 3)); + m_via6522->write_pb4(BIT(data, 4)); + m_via6522->write_pb5(BIT(data, 5)); + m_via6522->write_pb6(BIT(data, 6)); + /* assert strobe */ + m_via6522->write_cb1(1); + /* clear strobe */ + m_via6522->write_cb1(0); +} + + +/*************************************************************************** + 6502 CPU Board - Part No. 200,000 +***************************************************************************/ + +MACHINE_CONFIG_START(acrnsys_state::a6502) + M6502(config, m_maincpu, 24_MHz_XTAL / 12); /* 1MHz 6502 CPU */ + m_maincpu->set_addrmap(AS_PROGRAM, &acrnsys_state::a6502_mem); + + INPUT_MERGER_ANY_HIGH(config, m_irqs).output_handler().set_inputline(m_maincpu, M6502_IRQ_LINE); + + MCFG_DEVICE_ADD(m_ins8154, INS8154, 0) + //MCFG_INS8154_IN_A_CB(READ8(*this, acrnsys_state, ins8154_pa_r)) + //MCFG_INS8154_OUT_A_CB(WRITE8(*this, acrnsys_state, ins8154_pa_w)) + MCFG_INS8154_IN_B_CB(READ8(*this, acrnsys_state, kbd_r)) + + MCFG_DEVICE_ADD("keyboard", GENERIC_KEYBOARD, 0) + MCFG_GENERIC_KEYBOARD_CB(PUT(acrnsys_state, kbd_put)) +MACHINE_CONFIG_END + + +/*************************************************************************** + 6502A CPU Board - Part No. 200,005 +***************************************************************************/ + +MACHINE_CONFIG_START(acrnsys_state::a6502a) + M6502(config, m_maincpu, 24_MHz_XTAL / 12); /* 2MHz 6502A CPU */ + m_maincpu->set_addrmap(AS_PROGRAM, &acrnsys_state::a6502a_mem); + + INPUT_MERGER_ANY_HIGH(config, m_irqs).output_handler().set_inputline(m_maincpu, M6502_IRQ_LINE); + + VIA6522(config, m_via6522, 4_MHz_XTAL / 4); + m_via6522->readpa_handler().set(FUNC(acrnsys_state::kbd_r)); + //m_via6522->cb2_handler().set(FUNC(acrnsys_state::cass_w)); + m_via6522->irq_handler().set(m_irqs, FUNC(input_merger_device::in_w<0>)); + + MCFG_DEVICE_ADD("keyboard", GENERIC_KEYBOARD, 0) + MCFG_GENERIC_KEYBOARD_CB(PUT(acrnsys_state, kbd_put)) +MACHINE_CONFIG_END + + +/*************************************************************************** + 6809 CPU Board - Part No. 200,012 +***************************************************************************/ + +MACHINE_CONFIG_START(acrnsys_state::a6809) + MC6809(config, m_maincpu, 4_MHz_XTAL); + m_maincpu->set_addrmap(AS_PROGRAM, &acrnsys_state::a6809_mem); + + INPUT_MERGER_ANY_HIGH(config, m_irqs).output_handler().set_inputline(m_maincpu, M6809_IRQ_LINE); + + VIA6522(config, m_via6522, 4_MHz_XTAL / 4); + m_via6522->writepa_handler().set("cent_data_out", FUNC(output_latch_device::bus_w)); + m_via6522->ca2_handler().set("centronics", FUNC(centronics_device::write_strobe)); + //m_via6522->cb2_handler().set(FUNC(acrnsys_state::cass_w)); + m_via6522->irq_handler().set(m_irqs, FUNC(input_merger_device::in_w<0>)); + + CENTRONICS(config, m_centronics, centronics_devices, "printer"); + m_centronics->ack_handler().set(m_via6522, FUNC(via6522_device::write_ca1)); + m_centronics->busy_handler().set(m_via6522, FUNC(via6522_device::write_pa7)); + MCFG_CENTRONICS_OUTPUT_LATCH_ADD("cent_data_out", "centronics") + + MCFG_DEVICE_ADD("keyboard", GENERIC_KEYBOARD, 0) + MCFG_GENERIC_KEYBOARD_CB(PUT(acrnsys_state, kbd_put_pb)) +MACHINE_CONFIG_END + + +/*************************************************************************** + MACHINE DRIVERS +***************************************************************************/ + +void acrnsys_state::acrnsys2(machine_config &config) +{ + /* 6502 CPU Board */ + a6502(config); + + /* Acorn Bus - 8 Slot Backplane */ + ACORN_BUS(config, m_bus, 0); + m_bus->set_cputag(m_maincpu); + m_bus->out_irq_callback().set(m_irqs, FUNC(input_merger_device::in_w<1>)); + m_bus->out_nmi_callback().set(FUNC(acrnsys_state::bus_nmi_w)); + ACORN_BUS_SLOT(config, "bus1", m_bus, acorn_bus_devices, "8k"); // 0x2000-0x3fff + ACORN_BUS_SLOT(config, "bus2", m_bus, acorn_bus_devices, "vdu40"); + ACORN_BUS_SLOT(config, "bus3", m_bus, acorn_bus_devices, "cass"); + ACORN_BUS_SLOT(config, "bus4", m_bus, acorn_bus_devices, nullptr); + ACORN_BUS_SLOT(config, "bus5", m_bus, acorn_bus_devices, nullptr); + ACORN_BUS_SLOT(config, "bus6", m_bus, acorn_bus_devices, nullptr); + ACORN_BUS_SLOT(config, "bus7", m_bus, acorn_bus_devices, nullptr); + + /* Software lists */ + SOFTWARE_LIST(config, "flop_list").set_original("acrnsys_flop"); + SOFTWARE_LIST(config, "rom_list").set_original("acrnsys_rom"); +} + + +void acrnsys_state::acrnsys3(machine_config &config) +{ + /* 6502 CPU Board */ + a6502(config); + + /* Acorn Bus - 8 Slot Backplane */ + ACORN_BUS(config, m_bus, 0); + m_bus->set_cputag(m_maincpu); + m_bus->out_irq_callback().set(m_irqs, FUNC(input_merger_device::in_w<1>)); + m_bus->out_nmi_callback().set(FUNC(acrnsys_state::bus_nmi_w)); + ACORN_BUS_SLOT(config, "bus1", m_bus, acorn_bus_devices, "8k"); // 0x2000-0x3fff + ACORN_BUS_SLOT(config, "bus2", m_bus, acorn_bus_devices, "8k"); // 0xc000-0xdfff + ACORN_BUS_SLOT(config, "bus3", m_bus, acorn_bus_devices, "vdu40"); + ACORN_BUS_SLOT(config, "bus4", m_bus, acorn_bus_devices, "fdc"); + ACORN_BUS_SLOT(config, "bus5", m_bus, acorn_bus_devices, nullptr); + ACORN_BUS_SLOT(config, "bus6", m_bus, acorn_bus_devices, nullptr); + ACORN_BUS_SLOT(config, "bus7", m_bus, acorn_bus_devices, nullptr); + + /* Software lists */ + SOFTWARE_LIST(config, "flop_list").set_original("acrnsys_flop"); + SOFTWARE_LIST(config, "rom_list").set_original("acrnsys_rom"); +} + + +void acrnsys_state::acrnsys3_6809(machine_config &config) +{ + /* 6809 CPU Board */ + a6809(config); + + /* Acorn Bus - 8 Slot Backplane */ + ACORN_BUS(config, m_bus, 0); + m_bus->set_cputag(m_maincpu); + m_bus->out_irq_callback().set(m_irqs, FUNC(input_merger_device::in_w<1>)); + m_bus->out_nmi_callback().set(FUNC(acrnsys_state::bus_nmi_w)); + ACORN_BUS_SLOT(config, "bus1", m_bus, acorn_bus_devices, "8k"); // 0x0000-0x1fff + ACORN_BUS_SLOT(config, "bus2", m_bus, acorn_bus_devices, "8k"); // 0x2000-0x3fff + ACORN_BUS_SLOT(config, "bus3", m_bus, acorn_bus_devices, "8k"); // 0xc000-0xdfff + ACORN_BUS_SLOT(config, "bus4", m_bus, acorn_bus_devices, "vdu40"); + ACORN_BUS_SLOT(config, "bus5", m_bus, acorn_bus_devices, "cass"); + ACORN_BUS_SLOT(config, "bus6", m_bus, acorn_bus_devices, "fdc"); + ACORN_BUS_SLOT(config, "bus7", m_bus, acorn_bus_devices, nullptr); + + /* Software lists */ + SOFTWARE_LIST(config, "flop_list").set_original("acrnsys_flop"); +} + + +void acrnsys_state::acrnsys4(machine_config &config) +{ + /* 6502 CPU Board */ + a6502(config); + + /* Acorn Bus - 14 Slot Backplane */ + ACORN_BUS(config, m_bus, 0); + m_bus->set_cputag(m_maincpu); + m_bus->out_irq_callback().set(m_irqs, FUNC(input_merger_device::in_w<1>)); + m_bus->out_nmi_callback().set(FUNC(acrnsys_state::bus_nmi_w)); + ACORN_BUS_SLOT(config, "bus1", m_bus, acorn_bus_devices, "8k"); // 0x2000-0x3fff + ACORN_BUS_SLOT(config, "bus2", m_bus, acorn_bus_devices, "8k"); // 0xc000-0xdfff + ACORN_BUS_SLOT(config, "bus3", m_bus, acorn_bus_devices, "vdu40"); + ACORN_BUS_SLOT(config, "bus4", m_bus, acorn_bus_devices, "fdc"); + ACORN_BUS_SLOT(config, "bus5", m_bus, acorn_bus_devices, nullptr); + ACORN_BUS_SLOT(config, "bus6", m_bus, acorn_bus_devices, nullptr); + ACORN_BUS_SLOT(config, "bus7", m_bus, acorn_bus_devices, nullptr); + ACORN_BUS_SLOT(config, "bus8", m_bus, acorn_bus_devices, nullptr); + ACORN_BUS_SLOT(config, "bus9", m_bus, acorn_bus_devices, nullptr); + ACORN_BUS_SLOT(config, "bus10", m_bus, acorn_bus_devices, nullptr); + ACORN_BUS_SLOT(config, "bus11", m_bus, acorn_bus_devices, nullptr); + ACORN_BUS_SLOT(config, "bus12", m_bus, acorn_bus_devices, nullptr); + ACORN_BUS_SLOT(config, "bus13", m_bus, acorn_bus_devices, nullptr); + + /* Software lists */ + SOFTWARE_LIST(config, "flop_list").set_original("acrnsys_flop"); + SOFTWARE_LIST(config, "rom_list").set_original("acrnsys_rom"); +} + + +void acrnsys_state::acrnsys5(machine_config &config) +{ + /* 6502A CPU Board */ + a6502a(config); + + /* Acorn Bus - 7 Slot Backplane */ + ACORN_BUS(config, m_bus, 0); + m_bus->set_cputag(m_maincpu); + m_bus->out_irq_callback().set(m_irqs, FUNC(input_merger_device::in_w<1>)); + m_bus->out_nmi_callback().set(FUNC(acrnsys_state::bus_nmi_w)); + ACORN_BUS_SLOT(config, "bus1", m_bus, acorn_bus_devices, "32k"); // 32K + ACORN_BUS_SLOT(config, "bus2", m_bus, acorn_bus_devices, "32k"); // 16K + ACORN_BUS_SLOT(config, "bus3", m_bus, acorn_bus_devices, "vdu80"); + ACORN_BUS_SLOT(config, "bus4", m_bus, acorn_bus_devices, "fdc"); + ACORN_BUS_SLOT(config, "bus5", m_bus, acorn_bus_devices, "econet"); + ACORN_BUS_SLOT(config, "bus6", m_bus, acorn_bus_devices, nullptr); + + /* Software lists */ + SOFTWARE_LIST(config, "flop_list").set_original("acrnsys_flop"); + SOFTWARE_LIST(config, "rom_list").set_original("acrnsys_rom"); +} + + +/*************************************************************************** + ROM definitions +***************************************************************************/ + +ROM_START( acrnsys2 ) + ROM_REGION(0x1000, "maincpu", 0) + ROM_LOAD("syscos40.ic7", 0x0800, 0x0800, BAD_DUMP CRC(af457ccc) SHA1(c8c1fbfb8d2e8aa0fdf8e3dc80993ad404cc943d)) // Acorn COS (no known dump, this is re-created from source) +ROM_END + +ROM_START( acrnsys3 ) + ROM_REGION(0x1000, "maincpu", 0) + ROM_LOAD("tosdos-s3.ic7", 0x0000, 0x1000, CRC(9b1fbec4) SHA1(4cb322dadcfba9c452797d6cc2096f0c92e8792c)) // Acorn DOS +ROM_END + +ROM_START( acrnsys3_6809 ) + ROM_REGION(0x1000, "maincpu", 0) + ROM_LOAD("acorn6809.ic4", 0x0000, 0x0800, CRC(5fa5b632) SHA1(b14a884bf82a7a8c23bc03c2e112728dd1a74896)) + + ROM_REGION(0x100, "proms", 0) + ROM_LOAD("acorn6809.ic11", 0x0000, 0x0100, CRC(7908317d) SHA1(e0f1e5bd3a8598d3b62bc432dd1f3892ed7e66d8)) // address decoder +ROM_END + +#define rom_acrnsys4 rom_acrnsys3 + +ROM_START( acrnsys5 ) + /* 6502A CPU board can take 4K, 8K, 16K ROMs */ + ROM_REGION(0x2000, "maincpu", 0) + /* References suggest models 5A-5E also exist, this is 5F */ + ROM_LOAD("sys5f_iss1.ic11", 0x0000, 0x2000, CRC(cd80418d) SHA1(e588298239b5360b5d1e15d5cd9f7fe2b1693e5d)) // 201,625 +ROM_END + +/* Driver */ + +/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ +COMP( 1980, acrnsys2, acrnsys3, 0, acrnsys2, acrnsys, acrnsys_state, empty_init, "Acorn", "Acorn System 2", MACHINE_NO_SOUND_HW ) +COMP( 1980, acrnsys3, 0, 0, acrnsys3, acrnsys, acrnsys_state, empty_init, "Acorn", "Acorn System 3 (6502 CPU)", MACHINE_NO_SOUND_HW ) +COMP( 1980, acrnsys3_6809, acrnsys3, 0, acrnsys3_6809, acrnsys, acrnsys_state, empty_init, "Acorn", "Acorn System 3 (6809 CPU)", MACHINE_NO_SOUND_HW ) +COMP( 1980, acrnsys4, acrnsys3, 0, acrnsys4, acrnsys, acrnsys_state, empty_init, "Acorn", "Acorn System 4", MACHINE_NO_SOUND_HW ) +COMP( 1982, acrnsys5, 0, 0, acrnsys5, acrnsys, acrnsys_state, empty_init, "Acorn", "Acorn System 5", MACHINE_NO_SOUND_HW ) |