// 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/mos6530n.h" #include "machine/timer.h" #include "video/pwm.h" #include "junior.lh" 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; void mem_map(address_map &map); required_device m_riot; required_device m_maincpu; required_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_new_device::ram_map)); map(0x1a80, 0x1a9f).m(m_riot, FUNC(mos6532_new_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, junior_state, junior_stop, 0) PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("S2: RST") PORT_CODE(KEYCODE_F3) PORT_CHANGED_MEMBER(DEVICE_SELF, 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_NEW(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 /* 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 )