// license:BSD-3-Clause // copyright-holders:Curt Coder /*************************************************************************** Beta Computer http://retro.hansotten.nl/index.php?page=beta-computer When first started, press G to begin. Pasting: 0-F : as is M (inc) : ^ AD : - DA : = GO : X Test Paste: X-0011=11^22^33^44^55^66^77^88^99^-0011 Now press M to confirm the data has been entered. ****************************************************************************/ /* TODO: - write EPROM back to file */ #include "includes/beta.h" #include "beta.lh" /* Memory Maps */ static ADDRESS_MAP_START( beta_mem, AS_PROGRAM, 8, beta_state ) AM_RANGE(0x0000, 0x007f) AM_MIRROR(0x7f00) AM_RAM // 6532 RAM AM_RANGE(0x0080, 0x00ff) AM_MIRROR(0x7f00) AM_DEVREADWRITE(M6532_TAG, riot6532_device, read, write) AM_RANGE(0x8000, 0x87ff) AM_MIRROR(0x7800) AM_ROM ADDRESS_MAP_END /* Input Ports */ INPUT_CHANGED_MEMBER( beta_state::trigger_reset ) { m_maincpu->set_input_line(INPUT_LINE_RESET, newval ? CLEAR_LINE : ASSERT_LINE); } static INPUT_PORTS_START( beta ) PORT_START("Q6") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_A) PORT_CHAR('A') PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("GO") PORT_CODE(KEYCODE_G) PORT_CODE(KEYCODE_X) PORT_CHAR('X') PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_START("Q7") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_M) PORT_CODE(KEYCODE_UP) PORT_CHAR('^') PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_START("Q8") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_B) PORT_CHAR('B') PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("DA") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=') PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_START("Q9") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_C) PORT_CHAR('C') PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_D) PORT_CHAR('D') PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_E) PORT_CHAR('E') PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F) PORT_CHAR('F') PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("AD") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_BIT( 0xe0, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_START("SPECIAL") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("RESET") PORT_CODE(KEYCODE_R) PORT_CHANGED_MEMBER(DEVICE_SELF, beta_state, trigger_reset, 0) INPUT_PORTS_END /* M6532 Interface */ TIMER_CALLBACK_MEMBER(beta_state::led_refresh) { if (m_ls145_p < 6) { output_set_digit_value(m_ls145_p, m_segment); } } READ8_MEMBER( beta_state::riot_pa_r ) { /* bit description PA0 2716 D0, segment D, key bit 0 PA1 2716 D1, segment E, key bit 1 PA2 2716 D2, segment C, key bit 2 PA3 2716 D3, segment G, key bit 3 PA4 2716 D4, segment F, key bit 4 PA5 2716 D5, segment B PA6 2716 D6, segment A PA7 2716 D7 */ UINT8 data = 0xff; switch (m_ls145_p) { case 6: data &= m_q6->read(); break; case 7: data &= m_q7->read(); break; case 8: data &= m_q8->read(); break; case 9: data &= m_q9->read(); break; default: if (!m_eprom_oe && !m_eprom_ce) { data = m_eprom->base()[m_eprom_addr & 0x7ff]; popmessage("EPROM read %04x = %02x\n", m_eprom_addr & 0x7ff, data); } } return data; } WRITE8_MEMBER( beta_state::riot_pa_w ) { /* bit description PA0 2716 D0, segment D, key bit 0 PA1 2716 D1, segment E, key bit 1 PA2 2716 D2, segment C, key bit 2 PA3 2716 D3, segment G, key bit 3 PA4 2716 D4, segment F, key bit 4 PA5 2716 D5, segment B PA6 2716 D6, segment A PA7 2716 D7 */ // logerror("PA %02x\n", data); /* display */ m_segment = BITSWAP8(data, 7, 3, 4, 1, 0, 2, 5, 6) & 0x7f; m_led_refresh_timer->adjust(attotime::from_usec(70)); /* EPROM data */ m_eprom_data = data; } READ8_MEMBER( beta_state::riot_pb_r ) { return 0; } WRITE8_MEMBER( beta_state::riot_pb_w ) { /* bit description PB0 74LS145 P0 PB1 74LS145 P1 PB2 74LS145 P2 PB3 74LS145 P3, 74LS164 D PB4 loudspeaker, data led PB5 address led, 74LS164 CP PB6 2716 _OE PB7 2716 _CE */ //logerror("PB %02x %02x\n", data, olddata); /* display */ m_ls145_p = data & 0x0f; /* speaker */ m_speaker->level_w(!BIT(data, 4)); /* address led */ output_set_led_value(0, BIT(data, 5)); /* data led */ output_set_led_value(1, !BIT(data, 5)); /* EPROM address shift */ if (!BIT(m_old_data, 5) && BIT(data, 5)) { m_eprom_addr <<= 1; m_eprom_addr |= BIT(m_old_data, 3); } /* EPROM output enable */ m_eprom_oe = BIT(data, 6); /* EPROM chip enable */ m_eprom_ce = BIT(data, 7); if (BIT(data, 6) && (!BIT(m_old_data, 7) && BIT(data, 7))) { popmessage("EPROM write %04x = %02x\n", m_eprom_addr & 0x7ff, m_eprom_data); m_eprom->base()[m_eprom_addr & 0x7ff] &= m_eprom_data; } m_old_data = data; } static const riot6532_interface beta_riot_interface = { DEVCB_DRIVER_MEMBER(beta_state, riot_pa_r), DEVCB_DRIVER_MEMBER(beta_state, riot_pb_r), DEVCB_DRIVER_MEMBER(beta_state, riot_pa_w), DEVCB_DRIVER_MEMBER(beta_state, riot_pb_w), DEVCB_CPU_INPUT_LINE(M6502_TAG, M6502_IRQ_LINE) }; /* Quickload */ DEVICE_IMAGE_UNLOAD_MEMBER( beta_state, beta_eprom ) { UINT8 *ptr = m_eprom->base(); image.fwrite(ptr, 0x800); } /* Machine Initialization */ void beta_state::machine_start() { m_led_refresh_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(beta_state::led_refresh),this)); // state saving save_item(NAME(m_eprom_oe)); save_item(NAME(m_eprom_ce)); save_item(NAME(m_eprom_addr)); save_item(NAME(m_eprom_data)); save_item(NAME(m_old_data)); save_item(NAME(m_ls145_p)); save_item(NAME(m_segment)); } /* Machine Driver */ static MACHINE_CONFIG_START( beta, beta_state ) /* basic machine hardware */ MCFG_CPU_ADD(M6502_TAG, M6502, XTAL_4MHz/4) MCFG_CPU_PROGRAM_MAP(beta_mem) /* video hardware */ MCFG_DEFAULT_LAYOUT( layout_beta ) /* sound hardware */ MCFG_SPEAKER_STANDARD_MONO("mono") MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0) MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25) /* devices */ MCFG_RIOT6532_ADD(M6532_TAG, XTAL_4MHz/4, beta_riot_interface) /* EPROM socket */ MCFG_CARTSLOT_ADD(EPROM_TAG) MCFG_CARTSLOT_EXTENSION_LIST("bin,rom") MCFG_CARTSLOT_NOT_MANDATORY MCFG_CARTSLOT_UNLOAD(beta_state,beta_eprom) /* internal ram */ MCFG_RAM_ADD(RAM_TAG) MCFG_RAM_DEFAULT_SIZE("256") MACHINE_CONFIG_END /* ROMs */ ROM_START( beta ) ROM_REGION( 0x10000, M6502_TAG, 0 ) ROM_LOAD( "beta.rom", 0x8000, 0x0800, CRC(d42fdb17) SHA1(595225a0cd43dd76c46b2aff6c0f27d5991cc4f0)) ROM_REGION( 0x800, EPROM_TAG, ROMREGION_ERASEFF ) ROM_CART_LOAD( EPROM_TAG, 0x0000, 0x0800, ROM_FULLSIZE ) ROM_END /* System Drivers */ /* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */ COMP( 1984, beta, 0, 0, beta, beta, driver_device, 0, "Pitronics", "Beta", GAME_SUPPORTS_SAVE )