// license:BSD-3-Clause // copyright-holders:Robbbert // thanks-to:Manfred Schneider /*************************************************************************** Elektor Junior 17/07/2009 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. ****************************************************************************/ #include "emu.h" #include "cpu/m6502/m6502.h" #include "machine/mos6530n.h" #include "machine/timer.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_line(*this, "LINE%u", 0U) , m_digit(*this, "digit%u", 0U) { } DECLARE_INPUT_CHANGED_MEMBER(junior_reset); void junior(machine_config &config); private: DECLARE_READ8_MEMBER(junior_riot_a_r); DECLARE_READ8_MEMBER(junior_riot_b_r); DECLARE_WRITE8_MEMBER(junior_riot_a_w); DECLARE_WRITE8_MEMBER(junior_riot_b_w); virtual void machine_start() override; virtual void machine_reset() override; TIMER_DEVICE_CALLBACK_MEMBER(junior_update_leds); void junior_mem(address_map &map); required_device m_riot; uint8_t m_port_a; uint8_t m_port_b; uint8_t m_led_time[6]; required_device m_maincpu; required_ioport_array<4> m_line; output_finder<6> m_digit; }; void junior_state::junior_mem(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(); // Monitor } INPUT_CHANGED_MEMBER(junior_state::junior_reset) { if (newval == 0) m_maincpu->reset(); } /* 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("sw1: ST") PORT_CODE(KEYCODE_F7) PORT_BIT( 0x20, 0x20, IPT_KEYBOARD ) PORT_NAME("sw2: RST") PORT_CODE(KEYCODE_F3) PORT_CHANGED_MEMBER(DEVICE_SELF, junior_state, junior_reset, 0) PORT_DIPNAME(0x10, 0x10, "sw3: SS (NumLock)") PORT_CODE(KEYCODE_NUMLOCK) PORT_TOGGLE PORT_DIPSETTING( 0x00, "single step") PORT_DIPSETTING( 0x10, "run") PORT_BIT( 0x08, 0x00, IPT_UNUSED ) PORT_BIT( 0x04, 0x00, IPT_UNUSED ) PORT_BIT( 0x02, 0x00, IPT_UNUSED ) PORT_BIT( 0x01, 0x00, IPT_UNUSED ) INPUT_PORTS_END READ8_MEMBER( junior_state::junior_riot_a_r ) { uint8_t data = 0xff; uint8_t const sel = ( m_port_b >> 1) & 0x0f; switch ( sel ) { case 0: case 1: case 2: data = m_line[sel]->read(); break; } return data; } READ8_MEMBER( junior_state::junior_riot_b_r ) { if ( m_port_b & 0x20 ) return 0xFF; return 0x7F; } WRITE8_MEMBER( junior_state::junior_riot_a_w ) { uint8_t idx = ( m_port_b >> 1 ) & 0x0f; m_port_a = data; if ((idx >= 4 && idx < 10) & ( m_port_a != 0xff )) { m_digit[idx - 4] = m_port_a ^ 0x7f; m_led_time[idx - 4] = 10; } } WRITE8_MEMBER( junior_state::junior_riot_b_w ) { uint8_t idx = ( data >> 1 ) & 0x0f; m_port_b = data; if ((idx >= 4 && idx < 10) & ( m_port_a != 0xff )) { m_digit[idx - 4] = m_port_a ^ 0x7f; m_led_time[idx - 4] = 10; } } TIMER_DEVICE_CALLBACK_MEMBER(junior_state::junior_update_leds) { int i; for ( i = 0; i < 6; i++ ) { if ( m_led_time[i] ) m_led_time[i]--; else m_digit[i] = 0; } } void junior_state::machine_start() { m_digit.resolve(); save_item(NAME(m_port_a)); save_item(NAME(m_port_b)); save_item(NAME(m_led_time)); } void junior_state::machine_reset() { int i; for ( i = 0; i < 6; i++ ) m_led_time[i] = 0; } 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::junior_mem); config.set_maximum_quantum(attotime::from_hz(50)); /* video hardware */ config.set_default_layout(layout_junior); /* Devices */ MOS6532_NEW(config, m_riot, 1_MHz_XTAL); m_riot->pa_rd_callback().set(FUNC(junior_state::junior_riot_a_r)); m_riot->pa_wr_callback().set(FUNC(junior_state::junior_riot_a_w)); m_riot->pb_rd_callback().set(FUNC(junior_state::junior_riot_b_r)); m_riot->pb_wr_callback().set(FUNC(junior_state::junior_riot_b_w)); m_riot->irq_wr_callback().set_inputline(m_maincpu, M6502_IRQ_LINE); TIMER(config, "led_timer").configure_periodic(FUNC(junior_state::junior_update_leds), attotime::from_hz(50)); } /* ROM definition */ ROM_START( junior ) ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF ) ROM_DEFAULT_BIOS("orig") ROM_SYSTEM_BIOS( 0, "orig", "Original ESS503" ) ROMX_LOAD( "ess503.ic2", 0x1c00, 0x0400, CRC(9e804f8c) SHA1(181bdb69fb4711cb008e7966747d4775a5e3ef69), ROM_BIOS(0)) ROM_SYSTEM_BIOS( 1, "mod-orig", "Mod-Original (2708)" ) ROMX_LOAD( "junior-mod.ic2", 0x1c00, 0x0400, CRC(ee8aa69d) SHA1(a132a51603f1a841c354815e6d868b335ac84364), ROM_BIOS(1)) ROM_SYSTEM_BIOS( 2, "2732", "Just monitor (2732)" ) ROMX_LOAD( "junior27321a.ic2", 0x1c00, 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 Electronics", "Junior Computer", MACHINE_SUPPORTS_SAVE | MACHINE_NO_SOUND_HW)