// license:BSD-3-Clause // copyright-holders:Miodrag Milanovic /*************************************************************************** Specialist machine driver by Miodrag Milanovic 20/03/2008 Cassette support 15/03/2008 Preliminary driver. ****************************************************************************/ #include "emu.h" #include "includes/special.h" /* Driver initialization */ void special_state::init_special() { m_bank1->configure_entry(0, m_mram); m_bank1->configure_entry(1, m_rom); } uint8_t special_state::porta_r() { for (int i = 0; i < 8; i++) if (m_io_keyboard[i]->read() < 0xfc) return (1 << i) ^ 0xff; return 0xff; } u8 special_state::kbd_r() { u8 data = 0xfc; if (m_porta < 0xff) for (u8 i = 0; i < 8; i++) if (!BIT(m_porta, i)) data &= m_io_keyboard[i]->read(); if (BIT(m_portc, 0, 4) < 0x0f) for (u8 i = 0; i < 4; i++) if (!BIT(m_portc, i)) data &= m_io_keyboard[8 + i]->read(); // shift key if (m_io_keyboard[12]->read()) data |= 2; return data; } uint8_t special_state::portb_r() { u8 data = kbd_r(); // strobe if a key is pressed // TODO: this conflicts with function keys - to check if ((data & 0xfc) < 0xfc) data &= 0x7f; // cassette if (m_cassette->input() > 0.01) data |= 0x81; return data; } uint8_t special_state::specimx_portb_r() { u8 data = kbd_r(); // cassette if (m_cassette->input() > 0.01) data |= 0x81; return data; } uint8_t special_state::portc_r() { for (u8 i = 0; i < 4; i++) if (m_io_keyboard[8 + i]->read() < 0xfc) return (1 << i) ^ 0x0f; return 0x0f; } void special_state::porta_w(uint8_t data) { m_porta = data; } void special_state::portb_w(uint8_t data) { m_portb = data; } void special_state::portc_w(uint8_t data) { specimx_portc_w(data); m_bank1->set_entry(BIT(data, 4)); } void special_state::specimx_portc_w(uint8_t data) { m_portc = data; m_cassette->output(BIT(data, 7) ? 1 : -1); m_dac->write(BIT(data, 5)); //beeper } void special_state::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) { switch (id) { case TIMER_PIT8253_GATES: m_pit->write_gate0(0); m_pit->write_gate1(0); m_pit->write_gate2(0); break; default: throw emu_fatalerror("Unknown id in special_state::device_timer"); } } /* Specialist MX */ void special_state::video_memory_w(offs_t offset, uint8_t data) { m_ram->pointer()[0x9000 + offset] = data; m_specimx_colorram[offset] = m_specimx_color; } void special_state::specimx_video_color_w(uint8_t data) { m_specimx_color = data; } uint8_t special_state::specimx_video_color_r() { return m_specimx_color; } void special_state::specimx_set_bank(offs_t i, uint8_t data) { address_space &space = m_maincpu->space(AS_PROGRAM); uint8_t *ram = m_ram->pointer(); space.install_write_bank(0xc000, 0xffbf, "bank3"); space.install_write_bank(0xffc0, 0xffdf, "bank4"); m_bank4->set_base(ram + 0xffc0); switch(i) { case 0 : space.install_write_bank(0x0000, 0x8fff, "bank1"); space.install_write_handler(0x9000, 0xbfff, write8sm_delegate(*this, FUNC(special_state::video_memory_w))); m_bank1->set_base(ram); m_bank2->set_base(ram + 0x9000); m_bank3->set_base(ram + 0xc000); break; case 1 : space.install_write_bank(0x0000, 0x8fff, "bank1"); space.install_write_bank(0x9000, 0xbfff, "bank2"); m_bank1->set_base(ram + 0x10000); m_bank2->set_base(ram + 0x19000); m_bank3->set_base(ram + 0x1c000); break; case 2 : space.unmap_write(0x0000, 0x8fff); space.unmap_write(0x9000, 0xbfff); m_bank1->set_base(m_rom); m_bank2->set_base(m_rom + 0x9000); m_bank3->set_base(ram + (BIT(data, 7) ? 0x1c000 : 0xc000)); break; } } void special_state::specimx_select_bank(offs_t offset, uint8_t data) { specimx_set_bank(offset, data); } uint8_t special_state::specimx_disk_ctrl_r() { return 0xff; } WRITE_LINE_MEMBER( special_state::fdc_drq ) { /* Clears HALT state of CPU when data is ready to read */ if(state) { m_maincpu->set_input_line(INPUT_LINE_HALT, CLEAR_LINE); } } void special_state::specimx_disk_ctrl_w(offs_t offset, uint8_t data) { floppy_image_device *floppy = nullptr; floppy_connector *con = m_fdd[m_drive & 1].target(); if(con) floppy = con->get_device(); m_fdc->set_floppy(floppy); floppy->mon_w(0); switch(offset) { case 0 : m_maincpu->set_input_line(INPUT_LINE_HALT, ASSERT_LINE); break; case 2 : floppy->ss_w(data & 1); break; case 3 : m_drive = data & 1; break; } } /* Erik */ void special_state::erik_set_bank() { uint8_t bank1 = m_RR_register & 3; uint8_t bank2 = BIT(m_RR_register, 2, 2); uint8_t bank3 = BIT(m_RR_register, 4, 2); uint8_t bank4 = BIT(m_RR_register, 6, 2); uint8_t *ram = m_ram->pointer(); address_space &space = m_maincpu->space(AS_PROGRAM); space.install_write_bank(0x0000, 0x3fff, "bank1"); space.install_write_bank(0x4000, 0x8fff, "bank2"); space.install_write_bank(0x9000, 0xbfff, "bank3"); space.install_write_bank(0xc000, 0xefff, "bank4"); space.install_write_bank(0xf000, 0xf7ff, "bank5"); space.install_write_bank(0xf800, 0xffff, "bank6"); switch(bank1) { case 1: case 2: case 3: m_bank1->set_base(ram + 0x10000*(bank1-1)); break; case 0: space.unmap_write(0x0000, 0x3fff); m_bank1->set_base(m_rom); break; } switch(bank2) { case 1: case 2: case 3: m_bank2->set_base(ram + 0x10000*(bank2-1) + 0x4000); break; case 0: space.unmap_write(0x4000, 0x8fff); m_bank2->set_base(m_rom + 0x4000); break; } switch(bank3) { case 1: case 2: case 3: m_bank3->set_base(ram + 0x10000*(bank3-1) + 0x9000); break; case 0: space.unmap_write(0x9000, 0xbfff); m_bank3->set_base(m_rom + 0x9000); break; } switch(bank4) { case 1: case 2: case 3: m_bank4->set_base(ram + 0x10000*(bank4-1) + 0xc000); m_bank5->set_base(ram + 0x10000*(bank4-1) + 0xf000); m_bank6->set_base(ram + 0x10000*(bank4-1) + 0xf800); break; case 0: space.unmap_write(0xc000, 0xefff); m_bank4->set_base(m_rom + 0xc000); space.unmap_write(0xf000, 0xf7ff); space.nop_read(0xf000, 0xf7ff); space.install_readwrite_handler(0xf800, 0xf803, 0, 0x7fc, 0, read8sm_delegate(*m_ppi, FUNC(i8255_device::read)), write8sm_delegate(*m_ppi, FUNC(i8255_device::write))); break; } } void special_state::init_erik() { m_erik_color_1 = 0; m_erik_color_2 = 0; m_erik_background = 0; } void special_state::machine_reset() { if (m_bank6) // erik { m_erik_color_1 = 0; m_erik_color_2 = 0; m_erik_background = 0; m_RR_register = 0x00; m_RC_register = 0x00; erik_set_bank(); } else if (m_bank4) // specimx { m_specimx_color = 0xF0; // default for -bios 1/2, since they don't have colour specimx_set_bank(2, 0); // Initial load ROM disk timer_set(attotime::zero, TIMER_PIT8253_GATES); } } void special_state::machine_start() { if (m_bank6) // erik { save_item(NAME(m_erik_color_1)); save_item(NAME(m_erik_color_2)); save_item(NAME(m_erik_background)); save_item(NAME(m_RR_register)); save_item(NAME(m_RC_register)); } else if (m_bank4) // specimx { m_specimx_colorram = std::make_unique(0x3000); save_pointer(NAME(m_specimx_colorram), 0x3000); save_item(NAME(m_drive)); save_item(NAME(m_specimx_color)); } save_item(NAME(m_porta)); save_item(NAME(m_portb)); save_item(NAME(m_portc)); } uint8_t special_state::erik_rr_reg_r() { return m_RR_register; } void special_state::erik_rr_reg_w(uint8_t data) { m_RR_register = data; erik_set_bank(); } uint8_t special_state::erik_rc_reg_r() { return m_RC_register; } void special_state::erik_rc_reg_w(uint8_t data) { m_RC_register = data; m_erik_color_1 = m_RC_register & 7; m_erik_color_2 = BIT(m_RC_register, 3, 3); m_erik_background = BIT(m_RC_register, 6) + BIT(m_RC_register, 7) * 4; } uint8_t special_state::erik_disk_reg_r() { return 0xff; } void special_state::erik_disk_reg_w(uint8_t data) { /* wd17xx_set_side (m_fdc,data & 1); wd17xx_set_drive(m_fdc,(data >> 1) & 1); wd17xx_dden_w(m_fdc, BIT(data, 2)); floppy_mon_w(floppy_get_device(machine(), BIT(data, 1)), 0); floppy_mon_w(floppy_get_device(machine(), BIT(data, 1) ^ 1), 1); floppy_drive_set_ready_state(floppy_get_device(machine(), BIT(data, 1)), 1, 1);*/ }