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Diffstat (limited to 'src/mame/elektor/junior.cpp')
-rw-r--r-- | src/mame/elektor/junior.cpp | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/src/mame/elektor/junior.cpp b/src/mame/elektor/junior.cpp new file mode 100644 index 00000000000..67b73bf8b0c --- /dev/null +++ b/src/mame/elektor/junior.cpp @@ -0,0 +1,235 @@ +// license:BSD-3-Clause +// copyright-holders:Robbbert +// thanks-to:Manfred Schneider +/*************************************************************************** + + Elektor Junior + +2009-07-17 Skeleton driver. + +This is heavily based on the KIM-1, the keycodes and operation being +identical. + +Pasting: + 0-F : as is + + (inc) : ^ + AD : - + DA : = + GO : X + +(note: DA only works when addressing RAM) + +Test Paste: + =11^22^33^44^55^66^77^88^99^-0000 + Now press up-arrow to confirm the data has been entered. + +NMI and IRQ: +- When NMI is activated, it jumps to the vector located at 1A7A. +- When IRQ is activated, it jumps to the vector located at 1A7E. +- The user needs to populate these vectors before use, or the system + will crash when the debugging switches are used. Use RST to escape + from this. + + +To Do: +- Single-Step switch (and associated LED) needs to be hooked up + +****************************************************************************/ + +#include "emu.h" +#include "cpu/m6502/m6502.h" +#include "machine/mos6530.h" +#include "machine/timer.h" +#include "video/pwm.h" +#include "junior.lh" + + +namespace { + +class junior_state : public driver_device +{ +public: + junior_state(const machine_config &mconfig, device_type type, const char *tag) + : driver_device(mconfig, type, tag) + , m_riot(*this, "riot") + , m_maincpu(*this, "maincpu") + , m_display(*this, "display") + , m_io_keyboard(*this, "LINE%u", 0U) + { } + + DECLARE_INPUT_CHANGED_MEMBER(junior_reset); + DECLARE_INPUT_CHANGED_MEMBER(junior_stop); + void junior(machine_config &config); + +private: + u8 riot_a_r(); + void riot_a_w(u8 data); + void riot_b_w(u8 data); + u8 m_digit = 0U; + u8 m_seg = 0U; + + virtual void machine_start() override ATTR_COLD; + + void mem_map(address_map &map) ATTR_COLD; + + required_device<mos6532_device> m_riot; + required_device<cpu_device> m_maincpu; + required_device<pwm_display_device> m_display; + required_ioport_array<4> m_io_keyboard; +}; + + + + +void junior_state::mem_map(address_map &map) +{ + map.global_mask(0x1FFF); + map.unmap_value_high(); + map(0x0000, 0x03ff).ram(); // 1K RAM + map(0x1a00, 0x1a7f).m(m_riot, FUNC(mos6532_device::ram_map)); + map(0x1a80, 0x1a9f).m(m_riot, FUNC(mos6532_device::io_map)); + map(0x1c00, 0x1fff).rom().region("maincpu", 0); // Monitor +} + + +INPUT_CHANGED_MEMBER(junior_state::junior_reset) +{ + if (newval == 0) + m_maincpu->reset(); +} + +INPUT_CHANGED_MEMBER(junior_state::junior_stop) +{ + m_maincpu->set_input_line(INPUT_LINE_NMI, newval ? CLEAR_LINE : ASSERT_LINE); +} + + +/* Input ports */ +static INPUT_PORTS_START( junior ) +PORT_START("LINE0") /* IN0 keys row 0 */ + PORT_BIT( 0x80, 0x00, IPT_UNUSED ) + PORT_BIT( 0x40, 0x40, IPT_KEYBOARD ) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CHAR('0') + PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("1") PORT_CODE(KEYCODE_1) PORT_CHAR('1') + PORT_BIT( 0x10, 0x10, IPT_KEYBOARD ) PORT_NAME("2") PORT_CODE(KEYCODE_2) PORT_CHAR('2') + PORT_BIT( 0x08, 0x08, IPT_KEYBOARD ) PORT_NAME("3") PORT_CODE(KEYCODE_3) PORT_CHAR('3') + PORT_BIT( 0x04, 0x04, IPT_KEYBOARD ) PORT_NAME("4") PORT_CODE(KEYCODE_4) PORT_CHAR('4') + PORT_BIT( 0x02, 0x02, IPT_KEYBOARD ) PORT_NAME("5") PORT_CODE(KEYCODE_5) PORT_CHAR('5') + PORT_BIT( 0x01, 0x01, IPT_KEYBOARD ) PORT_NAME("6") PORT_CODE(KEYCODE_6) PORT_CHAR('6') + + PORT_START("LINE1") /* IN1 keys row 1 */ + PORT_BIT( 0x80, 0x00, IPT_UNUSED ) + PORT_BIT( 0x40, 0x40, IPT_KEYBOARD ) PORT_NAME("7") PORT_CODE(KEYCODE_7) PORT_CHAR('7') + PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("8") PORT_CODE(KEYCODE_8) PORT_CHAR('8') + PORT_BIT( 0x10, 0x10, IPT_KEYBOARD ) PORT_NAME("9") PORT_CODE(KEYCODE_9) PORT_CHAR('9') + PORT_BIT( 0x08, 0x08, IPT_KEYBOARD ) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('A') + PORT_BIT( 0x04, 0x04, IPT_KEYBOARD ) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('B') + PORT_BIT( 0x02, 0x02, IPT_KEYBOARD ) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('C') + PORT_BIT( 0x01, 0x01, IPT_KEYBOARD ) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('D') + + PORT_START("LINE2") /* IN2 keys row 2 */ + PORT_BIT( 0x80, 0x00, IPT_UNUSED ) + PORT_BIT( 0x40, 0x40, IPT_KEYBOARD ) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('E') + PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('F') + PORT_BIT( 0x10, 0x10, IPT_KEYBOARD ) PORT_NAME("AD") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') + PORT_BIT( 0x08, 0x08, IPT_KEYBOARD ) PORT_NAME("DA") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=') + PORT_BIT( 0x04, 0x04, IPT_KEYBOARD ) PORT_NAME("+") PORT_CODE(KEYCODE_UP) PORT_CHAR('^') + PORT_BIT( 0x02, 0x02, IPT_KEYBOARD ) PORT_NAME("GO") PORT_CODE(KEYCODE_X) PORT_CHAR('X') + PORT_BIT( 0x01, 0x01, IPT_KEYBOARD ) PORT_NAME("PC") PORT_CODE(KEYCODE_F6) + + PORT_START("LINE3") /* IN3 STEP and RESET keys, MODE switch */ + PORT_BIT( 0x80, 0x00, IPT_UNUSED ) + PORT_BIT( 0x40, 0x40, IPT_KEYBOARD ) PORT_NAME("S1: STOP") PORT_CODE(KEYCODE_F7) PORT_CHANGED_MEMBER(DEVICE_SELF, FUNC(junior_state::junior_stop), 0) + PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("S2: RST") PORT_CODE(KEYCODE_F3) PORT_CHANGED_MEMBER(DEVICE_SELF, FUNC(junior_state::junior_reset), 0) + PORT_DIPNAME(0x10, 0x10, "S24: SS (NumLock)") PORT_CODE(KEYCODE_NUMLOCK) PORT_TOGGLE + PORT_DIPSETTING( 0x00, "single step") + PORT_DIPSETTING( 0x10, "run") + PORT_DIPNAME(0x08, 0x08, "S25: Display") + PORT_DIPSETTING( 0x00, "Off") + PORT_DIPSETTING( 0x08, "On") + PORT_BIT( 0x04, 0x00, IPT_UNUSED ) + PORT_BIT( 0x02, 0x00, IPT_UNUSED ) + PORT_BIT( 0x01, 0x00, IPT_UNUSED ) +INPUT_PORTS_END + + + +u8 junior_state::riot_a_r() +{ + u8 data = 0xff; + + if (m_digit < 3) + data &= m_io_keyboard[m_digit]->read(); + + return data; + +} + +void junior_state::riot_a_w(u8 data) +{ + m_seg = ~data; + if (BIT(m_io_keyboard[3]->read(), 3)) + m_display->matrix(1 << m_digit, m_seg); + else + m_display->matrix(1 << m_digit, 0); +} + + +void junior_state::riot_b_w(u8 data) +{ + m_digit = (data >> 1) & 15; + if (BIT(m_io_keyboard[3]->read(), 3)) + m_display->matrix(1 << m_digit, m_seg); + else + m_display->matrix(1 << m_digit, 0); +} + + +void junior_state::machine_start() +{ + save_item(NAME(m_digit)); + save_item(NAME(m_seg)); +} + + +void junior_state::junior(machine_config &config) +{ + /* basic machine hardware */ + M6502(config, m_maincpu, 1_MHz_XTAL); + m_maincpu->set_addrmap(AS_PROGRAM, &junior_state::mem_map); + + /* video hardware */ + config.set_default_layout(layout_junior); + PWM_DISPLAY(config, m_display).set_size(10, 7); + m_display->set_segmask(0x3f0, 0x7f); + + /* Devices */ + MOS6532(config, m_riot, 1_MHz_XTAL); + m_riot->pa_rd_callback().set(FUNC(junior_state::riot_a_r)); + m_riot->pa_wr_callback().set(FUNC(junior_state::riot_a_w)); + m_riot->pb_wr_callback().set(FUNC(junior_state::riot_b_w)); + m_riot->irq_wr_callback().set_inputline(m_maincpu, M6502_IRQ_LINE); +} + + +/* ROM definition */ +ROM_START( junior ) + ROM_REGION( 0x0400, "maincpu", 0 ) + ROM_DEFAULT_BIOS("orig") + + ROM_SYSTEM_BIOS( 0, "orig", "Original ESS503" ) + ROMX_LOAD( "ess503.ic2", 0x0000, 0x0400, CRC(9e804f8c) SHA1(181bdb69fb4711cb008e7966747d4775a5e3ef69), ROM_BIOS(0)) + + ROM_SYSTEM_BIOS( 1, "mod-orig", "Mod-Original (2708)" ) + ROMX_LOAD( "junior-mod.ic2", 0x0000, 0x0400, CRC(ee8aa69d) SHA1(a132a51603f1a841c354815e6d868b335ac84364), ROM_BIOS(1)) + + ROM_SYSTEM_BIOS( 2, "2732", "Just monitor (2732)" ) + ROMX_LOAD( "junior27321a.ic2", 0x0000, 0x0400, CRC(e22f24cc) SHA1(a6edb52a9eea5e99624c128065e748e5a3fb2e4c), ROM_BIOS(2)) +ROM_END + +} // anonymous namespace + + +/* Driver */ + +/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ +COMP( 1980, junior, 0, 0, junior, junior, junior_state, empty_init, "Elektor", "Junior Computer", MACHINE_NO_SOUND_HW | MACHINE_SUPPORTS_SAVE ) |