diff options
Diffstat (limited to 'src/mame/netronics')
-rw-r--r-- | src/mame/netronics/elf.cpp | 101 | ||||
-rw-r--r-- | src/mame/netronics/elf.h | 28 | ||||
-rw-r--r-- | src/mame/netronics/exp85.cpp | 209 |
3 files changed, 200 insertions, 138 deletions
diff --git a/src/mame/netronics/elf.cpp b/src/mame/netronics/elf.cpp index f5a11dcb0ca..7e1f3c8972c 100644 --- a/src/mame/netronics/elf.cpp +++ b/src/mame/netronics/elf.cpp @@ -9,8 +9,7 @@ /* TODO: - - - proper layout + - add cassette I/O */ @@ -20,18 +19,12 @@ #include "speaker.h" #include "elf2.lh" -#define RUN \ - BIT(m_special->read(), 0) - #define LOAD \ BIT(m_special->read(), 1) #define MEMORY_PROTECT \ BIT(m_special->read(), 2) -#define INPUT \ - BIT(m_special->read(), 3) - /* Read/Write Handlers */ uint8_t elf2_state::dispon_r() @@ -92,13 +85,18 @@ void elf2_state::elf2_io(address_map &map) /* Input Ports */ -INPUT_CHANGED_MEMBER( elf2_state::input_w ) +INPUT_CHANGED_MEMBER(elf2_state::load_w) { - if (newval) - { - /* assert DMAIN */ - m_maincpu->set_input_line(COSMAC_INPUT_LINE_DMAIN, ASSERT_LINE); - } + /* DMAIN is reset while LOAD is off */ + if (!newval) + m_dmain = 0; +} + +INPUT_CHANGED_MEMBER(elf2_state::input_w) +{ + /* assert DMAIN */ + if (LOAD && !newval && ~m_sc & 2) + m_dmain = 1; } static INPUT_PORTS_START( elf2 ) @@ -132,51 +130,20 @@ static INPUT_PORTS_START( elf2 ) PORT_START("SPECIAL") PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("RUN") PORT_CODE(KEYCODE_R) PORT_TOGGLE - PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("LOAD") PORT_CODE(KEYCODE_L) PORT_TOGGLE - PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("M/P") PORT_CODE(KEYCODE_M) PORT_TOGGLE - PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("INPUT") PORT_CODE(KEYCODE_ENTER) PORT_CHANGED_MEMBER(DEVICE_SELF, elf2_state, input_w, 0) + PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("LOAD") PORT_CODE(KEYCODE_L) PORT_TOGGLE PORT_CHANGED_MEMBER(DEVICE_SELF, FUNC(elf2_state::load_w), 0) + PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("MP") PORT_CODE(KEYCODE_M) PORT_TOGGLE + PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("IN") PORT_CODE(KEYCODE_ENTER) PORT_CHANGED_MEMBER(DEVICE_SELF, FUNC(elf2_state::input_w), 0) INPUT_PORTS_END /* CDP1802 Configuration */ -int elf2_state::wait_r() -{ - return LOAD; -} - -int elf2_state::clear_r() -{ - return RUN; -} - -int elf2_state::ef4_r() -{ - return INPUT; -} - -void elf2_state::q_w(int state) -{ - m_led = state ? 1 : 0; -} - -uint8_t elf2_state::dma_r() -{ - return m_data; -} - void elf2_state::sc_w(uint8_t data) { - switch (data) - { - case COSMAC_STATE_CODE_S2_DMA: - case COSMAC_STATE_CODE_S3_INTERRUPT: - /* clear DMAIN */ - m_maincpu->set_input_line(COSMAC_INPUT_LINE_DMAIN, CLEAR_LINE); - break; - - default: - break; - } + /* DMAIN is reset while SC1 is high */ + if (data & 2) + m_dmain = 0; + + m_sc = data; } /* MM74C923 Interface */ @@ -204,19 +171,14 @@ void elf2_state::machine_start() { address_space &program = m_maincpu->space(AS_PROGRAM); - m_led.resolve(); - - /* initialize LED displays */ - m_7segs.resolve(); - m_led_l->rbi_w(1); - m_led_h->rbi_w(1); - /* setup memory banking */ program.install_rom(0x0000, 0x00ff, m_ram->pointer()); program.install_write_handler(0x0000, 0x00ff, write8sm_delegate(*this, FUNC(elf2_state::memory_w))); /* register for state saving */ save_item(NAME(m_data)); + save_item(NAME(m_sc)); + save_item(NAME(m_dmain)); } /* Machine Driver */ @@ -241,11 +203,12 @@ void elf2_state::elf2(machine_config &config) CDP1802(config, m_maincpu, XTAL(3'579'545)/2); m_maincpu->set_addrmap(AS_PROGRAM, &elf2_state::elf2_mem); m_maincpu->set_addrmap(AS_IO, &elf2_state::elf2_io); - m_maincpu->wait_cb().set(FUNC(elf2_state::wait_r)); - m_maincpu->clear_cb().set(FUNC(elf2_state::clear_r)); - m_maincpu->ef4_cb().set(FUNC(elf2_state::ef4_r)); - m_maincpu->q_cb().set(FUNC(elf2_state::q_w)); - m_maincpu->dma_rd_cb().set(FUNC(elf2_state::dma_r)); + m_maincpu->wait_cb().set_ioport("SPECIAL").bit(1).invert(); + m_maincpu->clear_cb().set_ioport("SPECIAL").bit(0); + m_maincpu->dma_in_cb().set([this]() { return m_dmain; }); + m_maincpu->ef4_cb().set_ioport("SPECIAL").bit(3); + m_maincpu->q_cb().set_output("led0"); + m_maincpu->dma_rd_cb().set(FUNC(elf2_state::data_r)); m_maincpu->dma_wr_cb().set(m_vdc, FUNC(cdp1861_device::dma_w)); m_maincpu->sc_cb().set(FUNC(elf2_state::sc_w)); @@ -254,7 +217,7 @@ void elf2_state::elf2(machine_config &config) CDP1861(config, m_vdc, XTAL(3'579'545)/2).set_screen(SCREEN_TAG); m_vdc->int_cb().set_inputline(m_maincpu, COSMAC_INPUT_LINE_INT); - m_vdc->dma_out_cb().set_inputline(m_maincpu, COSMAC_INPUT_LINE_DMAOUT); + m_vdc->dma_out_cb().set_inputline(m_maincpu, COSMAC_INPUT_LINE_DMAOUT); m_vdc->efx_cb().set_inputline(m_maincpu, COSMAC_INPUT_LINE_EF1); SCREEN(config, SCREEN_TAG, SCREEN_TYPE_RASTER); @@ -268,8 +231,8 @@ void elf2_state::elf2(machine_config &config) m_kb->x3_rd_callback().set_ioport("X3"); m_kb->x4_rd_callback().set_ioport("X4"); - DM9368(config, m_led_h, 0).update_cb().set(FUNC(elf2_state::digit_w<0>)); - DM9368(config, m_led_l, 0).update_cb().set(FUNC(elf2_state::digit_w<1>)); + DM9368(config, m_led_h).update_cb().set_output("digit0"); + DM9368(config, m_led_l).update_cb().set_output("digit1"); SPEAKER(config, "mono").front_center(); @@ -292,4 +255,4 @@ ROM_END /* System Drivers */ // YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS -COMP( 1978, elf2, 0, 0, elf2, elf2, elf2_state, empty_init, "Netronics", "Elf II", MACHINE_SUPPORTS_SAVE | MACHINE_NO_SOUND) +COMP( 1978, elf2, 0, 0, elf2, elf2, elf2_state, empty_init, "Netronics", "Elf II", MACHINE_SUPPORTS_SAVE | MACHINE_NO_SOUND_HW ) diff --git a/src/mame/netronics/elf.h b/src/mame/netronics/elf.h index 857b40093ea..d03ccbebe9b 100644 --- a/src/mame/netronics/elf.h +++ b/src/mame/netronics/elf.h @@ -35,33 +35,27 @@ public: , m_cassette(*this, "cassette") , m_ram(*this, RAM_TAG) , m_special(*this, "SPECIAL") - , m_7segs(*this, "digit%u", 0U) - , m_led(*this, "led0") { } void elf2(machine_config &config); - DECLARE_INPUT_CHANGED_MEMBER( input_w ); + DECLARE_INPUT_CHANGED_MEMBER(load_w); + DECLARE_INPUT_CHANGED_MEMBER(input_w); + +protected: + virtual void machine_start() override ATTR_COLD; private: uint8_t dispon_r(); uint8_t data_r(); void data_w(uint8_t data); void memory_w(offs_t offset, uint8_t data); - int wait_r(); - int clear_r(); - int ef4_r(); - void q_w(int state); - uint8_t dma_r(); void sc_w(uint8_t data); void da_w(int state); - template <unsigned N> void digit_w(uint8_t data) { m_7segs[N] = data; } - - DECLARE_QUICKLOAD_LOAD_MEMBER( quickload_cb ); - void elf2_io(address_map &map); - void elf2_mem(address_map &map); - virtual void machine_start() override; + DECLARE_QUICKLOAD_LOAD_MEMBER(quickload_cb); + void elf2_io(address_map &map) ATTR_COLD; + void elf2_mem(address_map &map) ATTR_COLD; required_device<cosmac_device> m_maincpu; required_device<cdp1861_device> m_vdc; @@ -71,11 +65,11 @@ private: required_device<cassette_image_device> m_cassette; required_device<ram_device> m_ram; required_ioport m_special; - output_finder<2> m_7segs; - output_finder<> m_led; - // display state + // internal state uint8_t m_data = 0; + uint8_t m_sc = 0; + uint8_t m_dmain = 0; }; #endif // MAME_NETRONICS_ELF_H diff --git a/src/mame/netronics/exp85.cpp b/src/mame/netronics/exp85.cpp index 2040f5ea527..2dfdd76a317 100644 --- a/src/mame/netronics/exp85.cpp +++ b/src/mame/netronics/exp85.cpp @@ -5,6 +5,8 @@ Explorer 85 12/05/2009 Skeleton driver. + 29/12/2023 Reworked driver to enable extended RAM memory, + MS BASIC and disable ROM mirror after boot/interrupt. Setting Up ========== @@ -16,6 +18,18 @@ Once started, press Space. The system will start up. All input must be in upper case. + Microsoft Basic is executed entering the following 2 commands + in the monitor prompt: + .XS nnnn-F87F mmmm-C000 <CR> + .G <CR> + + where nnnn is the previous value of the stack pointer, and mmmm is the + previous value of the program counter. + + BASIC will request the amount of RAM memory available, 8192 (bytes) must + be entered. + + ****************************************************************************/ /* @@ -23,8 +37,8 @@ TODO: - dump of the hexadecimal keyboard monitor ROM - - disable ROM mirror after boot - - RAM expansions + - 64K RAM expansion + - Disk drive and CP/M OS support */ @@ -41,24 +55,28 @@ #include "imagedev/cassette.h" #include "sound/spkrdev.h" - namespace { -#define I8085A_TAG "u100" -#define I8155_TAG "u106" -#define I8355_TAG "u105" +static constexpr int LOW_MEMORY_ROM_MIRROR_ENTRY = 0; +static constexpr int LOW_MEMORY_RAM_ENTRY = 1; class exp85_state : public driver_device { public: exp85_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) - , m_maincpu(*this, I8085A_TAG) + , m_maincpu(*this, "u100") + , m_i8355(*this, "u105") + , m_i8155(*this, "u106") , m_rs232(*this, "rs232") , m_cassette(*this, "cassette") , m_speaker(*this, "speaker") - , m_rom(*this, I8085A_TAG) + , m_rom(*this, "u105") // the 8355 chip contains the monitor ROM + , m_low_memory_view(*this, "low_memory_view") + , m_is_preparing_interrupt_call(false) + , m_ignore_timer_out(true) , m_tape_control(0) + , m_timer(nullptr) { } void exp85(machine_config &config); @@ -67,43 +85,64 @@ public: DECLARE_INPUT_CHANGED_MEMBER( trigger_rst75 ); private: - required_device<i8085a_cpu_device> m_maincpu; - required_device<rs232_port_device> m_rs232; - required_device<cassette_image_device> m_cassette; - required_device<speaker_sound_device> m_speaker; - required_memory_region m_rom; - - virtual void machine_start() override; + virtual void machine_start() override ATTR_COLD; uint8_t i8355_a_r(); void i8355_a_w(uint8_t data); int sid_r(); void sod_w(int state); - /* cassette state */ + void status_out(u8 status); + + void exp85_io(address_map &map) ATTR_COLD; + void exp85_mem(address_map &map) ATTR_COLD; + + void to_change(int to); + + TIMER_CALLBACK_MEMBER(trap_delay); + + // Member variables + required_device<i8085a_cpu_device> m_maincpu; + required_device<i8355_device> m_i8355; + required_device<i8155_device> m_i8155; + required_device<rs232_port_device> m_rs232; + required_device<cassette_image_device> m_cassette; + required_device<speaker_sound_device> m_speaker; + required_memory_region m_rom; + memory_view m_low_memory_view; + + bool m_is_preparing_interrupt_call; + bool m_ignore_timer_out; bool m_tape_control; - void exp85_io(address_map &map); - void exp85_mem(address_map &map); + emu_timer *m_timer; }; -/* Memory Maps */ +/* Memory Maps */ void exp85_state::exp85_mem(address_map &map) { map.unmap_value_high(); - map(0x0000, 0x07ff).bankr("bank1"); + // Extended RAM or mapped monitor ROM (only during interrupt and reset) + map(0x0000, 0x1fff).view(m_low_memory_view); + // Microsoft BASIC ROM map(0xc000, 0xdfff).rom(); - map(0xf000, 0xf7ff).rom(); - map(0xf800, 0xf8ff).ram(); + // Monitor ROM in the 8355 chip + map(0xf000, 0xf7ff).rom().region(m_rom, 0); + // 256 bytes of RAM of level A in the 8155 chip. + map(0xf800, 0xf8ff).rw(m_i8155, FUNC(i8155_device::memory_r), FUNC(i8155_device::memory_w)); + + // monitor ROM mirror + m_low_memory_view[LOW_MEMORY_ROM_MIRROR_ENTRY](0x0000, 0x07ff).rom().region(m_rom, 0); + // extended RAM + m_low_memory_view[LOW_MEMORY_RAM_ENTRY](0x0000, 0x1fff).ram(); } void exp85_state::exp85_io(address_map &map) { map.unmap_value_high(); map.global_mask(0xff); - map(0xf0, 0xf3).rw(I8355_TAG, FUNC(i8355_device::io_r), FUNC(i8355_device::io_w)); - map(0xf8, 0xfd).rw(I8155_TAG, FUNC(i8155_device::io_r), FUNC(i8155_device::io_w)); -// map(0xfe, 0xff).rw(I8279_TAG, FUNC(i8279_device::read), FUNC(i8279_device::write)); + map(0xf0, 0xf3).rw(m_i8355, FUNC(i8355_device::io_r), FUNC(i8355_device::io_w)); + map(0xf8, 0xfd).rw(m_i8155, FUNC(i8155_device::io_r), FUNC(i8155_device::io_w)); } /* Input Ports */ @@ -111,6 +150,7 @@ void exp85_state::exp85_io(address_map &map) INPUT_CHANGED_MEMBER( exp85_state::trigger_reset ) { m_maincpu->set_input_line(INPUT_LINE_RESET, newval ? CLEAR_LINE : ASSERT_LINE); + m_low_memory_view.select(LOW_MEMORY_ROM_MIRROR_ENTRY); } INPUT_CHANGED_MEMBER( exp85_state::trigger_rst75 ) @@ -119,10 +159,9 @@ INPUT_CHANGED_MEMBER( exp85_state::trigger_rst75 ) } static INPUT_PORTS_START( exp85 ) - PORT_START("SPECIAL") - PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("R") PORT_CODE(KEYCODE_F1) PORT_CHANGED_MEMBER(DEVICE_SELF, exp85_state, trigger_reset, 0) - PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("I") PORT_CODE(KEYCODE_F2) PORT_CHANGED_MEMBER(DEVICE_SELF, exp85_state, trigger_rst75, 0) + PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("R") PORT_CODE(KEYCODE_F1) PORT_CHANGED_MEMBER(DEVICE_SELF, FUNC(exp85_state::trigger_reset), 0) + PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYPAD ) PORT_NAME("I") PORT_CODE(KEYCODE_F2) PORT_CHANGED_MEMBER(DEVICE_SELF, FUNC(exp85_state::trigger_rst75), 0) INPUT_PORTS_END /* 8355 Interface */ @@ -201,6 +240,41 @@ void exp85_state::sod_w(int state) } } +/* Memory mapping mgmt during reset and interrupt */ + +void exp85_state::status_out(u8 status) +{ + // In the real hardware this is monitored via the IO/M, S0, S1 + // and ALE output pins of the 8085. + // Since these pins are not emulated, then we must explicitly get the internal + // interrupt acknowledge state (0x23 or 0x26) and behave as the monitor expects. + auto current_pc = m_maincpu->pc(); + if (status == 0x23 || status == 0x26) + { + // When an interrupt is triggered the low memory shall be set to the ROM mirror + m_is_preparing_interrupt_call = true; + m_low_memory_view.select(LOW_MEMORY_ROM_MIRROR_ENTRY); + } + else if (m_is_preparing_interrupt_call && (current_pc & 0xff00) == 0x0000) + { + // Avoids setting the lower memory back to RAM until + // it branches to the interrupt handler. + m_is_preparing_interrupt_call = false; + } + else if (!m_is_preparing_interrupt_call && (current_pc & 0xf000) == 0xf000) + { + // When the interrupt handler is executing and the address is >= 0xf000 + // the low memory is mapped to RAM + m_low_memory_view.select(LOW_MEMORY_RAM_ENTRY); + } + +} + +//************************************************************************** +// INPUT PORTS +//************************************************************************** + + /* Terminal Interface */ static DEVICE_INPUT_DEFAULTS_START( terminal ) @@ -215,16 +289,47 @@ DEVICE_INPUT_DEFAULTS_END void exp85_state::machine_start() { - /* setup memory banking */ - membank("bank1")->configure_entry(0, m_rom->base() + 0xf000); - membank("bank1")->configure_entry(1, m_rom->base()); - membank("bank1")->set_entry(0); + /* clear the trap line that is asserted on start */ + m_maincpu->set_input_line(I8085_TRAP_LINE, CLEAR_LINE); + + /* setup memory mirror switch */ + m_low_memory_view.select(LOW_MEMORY_ROM_MIRROR_ENTRY); save_item(NAME(m_tape_control)); + + m_timer = timer_alloc(FUNC(exp85_state::trap_delay), this); } -/* Machine Driver */ +void exp85_state::to_change(int to) +{ + // In the 8155 implementation the TIMER-OUT line (to) is + // asserted by default on initialization; this generates a spurious exception + // avoided here via an ignore flag. + if (m_ignore_timer_out) + { + m_ignore_timer_out = false; + return; + } + // The 8155 has a max TIMER-IN to TIMER-OUT delay of 400ns (datasheet page 3-256). In a real system + // this delay was measured in ~70ns. This is enough for the next instruction cycle to start + // and for the interrupt to be acknowledged one instruction later. This effect is fundamental + // for the ROM monitor stepping functionality, since it depends heavily on interrupting when the + // next instruction of the user program is being executed. + // MAME allows to set a timer of 70ns but that is not enough to get the CPU scheduled for at least 1 cycle + // before the interrupt is serviced, so we program a timer to expire beyond a full clock cycle. + m_timer->adjust(m_i8155->clocks_to_attotime(2), to); +} + +TIMER_CALLBACK_MEMBER(exp85_state::trap_delay) +{ + // The 8155 TIMER-OUT line is connected to the TRAP input line of the 8085; + // that line is set from the start high, and since there is no change in that line, the + // interrup is never requested (datasheet, page 6-13). + m_maincpu->set_input_line(I8085_TRAP_LINE, param == 1 ? ASSERT_LINE : CLEAR_LINE); +} + +/* Machine Driver */ void exp85_state::exp85(machine_config &config) { /* basic machine hardware */ @@ -233,17 +338,25 @@ void exp85_state::exp85(machine_config &config) m_maincpu->set_addrmap(AS_IO, &exp85_state::exp85_io); m_maincpu->in_sid_func().set(FUNC(exp85_state::sid_r)); m_maincpu->out_sod_func().set(FUNC(exp85_state::sod_w)); + m_maincpu->out_status_func().set(FUNC(exp85_state::status_out)); /* sound hardware */ SPEAKER(config, "mono").front_center(); SPEAKER_SOUND(config, m_speaker).add_route(ALL_OUTPUTS, "mono", 0.25); /* devices */ - I8155(config, I8155_TAG, 6.144_MHz_XTAL/2); - i8355_device &i8355(I8355(config, I8355_TAG, 6.144_MHz_XTAL/2)); - i8355.in_pa().set(FUNC(exp85_state::i8355_a_r)); - i8355.out_pa().set(FUNC(exp85_state::i8355_a_w)); + // The Explorer-85 uses a 6.144MHz clock, but the Intel 8085 divides by 2 this + // input frequency to give the processor internal operating frequency. + // The bus is connected to the CLK (out) of the 8085, running also + // at 6.144MHz divided by 2. + I8155(config, m_i8155, 6.144_MHz_XTAL/2); + m_i8155->out_to_callback().set(FUNC(exp85_state::to_change)); + + + I8355(config, m_i8355, 6.144_MHz_XTAL/2); + m_i8355->in_pa().set(FUNC(exp85_state::i8355_a_r)); + m_i8355->out_pa().set(FUNC(exp85_state::i8355_a_w)); CASSETTE(config, m_cassette); m_cassette->set_default_state(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED); @@ -251,31 +364,23 @@ void exp85_state::exp85(machine_config &config) RS232_PORT(config, "rs232", default_rs232_devices, "terminal").set_option_device_input_defaults("terminal", DEVICE_INPUT_DEFAULTS_NAME(terminal)); - /* internal ram */ - RAM(config, RAM_TAG).set_default_size("256").set_extra_options("4K"); } /* ROMs */ ROM_START( exp85 ) - ROM_REGION( 0x10000, I8085A_TAG, 0 ) + ROM_REGION( 0x10000, "u100", 0 ) // Microsoft BASIC ROM_DEFAULT_BIOS("eia") ROM_LOAD( "c000.bin", 0xc000, 0x0800, CRC(73ce4aad) SHA1(2c69cd0b6c4bdc92f4640bce18467e4e99255bab) ) ROM_LOAD( "c800.bin", 0xc800, 0x0800, CRC(eb3fdedc) SHA1(af92d07f7cb7533841b16e1176401363176857e1) ) ROM_LOAD( "d000.bin", 0xd000, 0x0800, CRC(c10c4a22) SHA1(30588ba0b27a775d85f8c581ad54400c8521225d) ) ROM_LOAD( "d800.bin", 0xd800, 0x0800, CRC(dfa43ef4) SHA1(56a7e7a64928bdd1d5f0519023d1594cacef49b3) ) - ROM_SYSTEM_BIOS( 0, "eia", "EIA Terminal" ) - ROMX_LOAD( "ex 85.u105", 0xf000, 0x0800, CRC(1a99d0d9) SHA1(57b6d48e71257bc4ef2d3dddc9b30edf6c1db766), ROM_BIOS(0) ) - ROM_SYSTEM_BIOS( 1, "hex", "Hex Keyboard" ) - ROMX_LOAD( "1kbd.u105", 0xf000, 0x0800, NO_DUMP, ROM_BIOS(1) ) - - ROM_REGION( 0x800, I8355_TAG, ROMREGION_ERASE00 ) - -/* ROM_DEFAULT_BIOS("terminal") - ROM_SYSTEM_BIOS( 0, "terminal", "Terminal" ) - ROMX_LOAD( "eia.u105", 0xf000, 0x0800, CRC(1a99d0d9) SHA1(57b6d48e71257bc4ef2d3dddc9b30edf6c1db766), ROM_BIOS(0) ) - ROM_SYSTEM_BIOS( 1, "hexkbd", "Hex Keyboard" ) - ROMX_LOAD( "hex.u105", 0xf000, 0x0800, NO_DUMP, ROM_BIOS(1) )*/ + + ROM_REGION( 0x800, "u105", 0 ) // Explorer 85 Monitor + ROM_SYSTEM_BIOS( 0, "eia", "EIA Terminal" ) // Serial terminal ROM + ROMX_LOAD( "ex 85.u105", 0x0000, 0x0800, CRC(1a99d0d9) SHA1(57b6d48e71257bc4ef2d3dddc9b30edf6c1db766), ROM_BIOS(0) ) + ROM_SYSTEM_BIOS( 1, "hex", "Hex Keyboard" ) // Keypad ROM (not available) + ROMX_LOAD( "1kbd.u105", 0x0000, 0x0800, NO_DUMP, ROM_BIOS(1) ) ROM_END } // anonymous namespace |