// license:BSD-3-Clause // copyright-holders:Curt Coder /*************************************************************************** Tandy 2000 ****************************************************************************/ /* TODO: - floppy - HDL is also connected to WP/TS input where TS is used to detect motor status - 3 second motor off delay timer - video (video RAM is at memory top - 0x1400, i.e. 0x1ec00) - keyboard ROM, same as earlier tandy 1000 - WD1010 - hard disk - clock/mouse 8042 mcu ROM, probably same as tandy 1000 isa clock/mouse adapter - sab3019 rtc */ #include "emu.h" #include "includes/tandy2k.h" #include "screen.h" #include "softlist.h" #include "speaker.h" #define LOG 1 // Read/Write Handlers void tandy2k_state::update_drq() { int drq0 = CLEAR_LINE; int drq1 = CLEAR_LINE; for (int i = 0; i < 4; i++) { if (BIT(m_dma_mux, 0 + i)) { if (BIT(m_dma_mux, 4 + i)) drq1 |= m_busdmarq[i]; else drq0 |= m_busdmarq[i]; } } m_maincpu->drq0_w(drq0); m_maincpu->drq1_w(drq1); } void tandy2k_state::dma_request(int line, int state) { m_busdmarq[line] = state; update_drq(); } void tandy2k_state::speaker_update() { int level = !(m_spkrdata & m_outspkr); m_speaker->level_w(level); } uint8_t tandy2k_state::char_ram_r(offs_t offset) { return m_char_ram[offset]; } void tandy2k_state::char_ram_w(offs_t offset, uint8_t data) { m_char_ram[offset] = data; } uint8_t tandy2k_state::videoram_r(offs_t offset) { address_space &program = m_maincpu->space(AS_PROGRAM); offs_t addr = (m_vram_base << 15) | (offset << 1); uint16_t data = program.read_word(addr); // character m_drb0->write(data & 0xff); // attributes m_drb1->write(data >> 8); return data & 0xff; } uint8_t tandy2k_state::enable_r() { /* bit signal description 0 RS-232 ring indicator 1 RS-232 carrier detect 2 3 4 5 6 7 _ACLOW */ uint8_t data = 0x80; data |= m_rs232->ri_r(); data |= m_rs232->dcd_r() << 1; return data; } void tandy2k_state::enable_w(uint8_t data) { /* bit signal description 0 KBEN keyboard enable 1 EXTCLK external baud rate clock 2 SPKRGATE enable periodic speaker output 3 SPKRDATA direct output to speaker 4 RFRQGATE enable refresh and baud rate clocks 5 FDCRESET* reset 8272 6 TMRIN0 enable 80186 timer 0 7 TMRIN1 enable 80186 timer 1 */ if (LOG) logerror("ENABLE %02x\n", data); // keyboard enable m_kb->power_w(BIT(data, 0)); m_pc_keyboard->enable(BIT(data, 0)); // external baud rate clock m_extclk = BIT(data, 1); // speaker gate m_pit->write_gate0(BIT(data, 2)); // speaker data m_spkrdata = BIT(data, 3); speaker_update(); // refresh and baud rate clocks m_pit->write_gate1(BIT(data, 4)); m_pit->write_gate2(BIT(data, 4)); // FDC reset m_fdc->reset_w(!BIT(data, 5)); // timer 0 enable m_maincpu->tmrin0_w(BIT(data, 6)); // timer 1 enable m_maincpu->tmrin1_w(BIT(data, 7)); } void tandy2k_state::dma_mux_w(uint8_t data) { /* bit description 0 DMA channel 0 enable 1 DMA channel 1 enable 2 DMA channel 2 enable 3 DMA channel 3 enable 4 DMA channel 0 select 5 DMA channel 1 select 6 DMA channel 2 select 7 DMA channel 3 select */ if (LOG) logerror("DMA MUX %02x\n", data); m_dma_mux = data; // check for DMA error int drq0 = 0; int drq1 = 0; for (int ch = 0; ch < 4; ch++) { if (BIT(data, ch)) { if (BIT(data, ch + 4)) drq1++; else drq0++; } } int dme = (drq0 > 2) || (drq1 > 2); m_pic1->ir6_w(dme); update_drq(); } uint8_t tandy2k_state::kbint_clr_r() { if (m_pb_sel == KBDINEN) { m_kb->busy_w(1); m_pic1->ir0_w(CLEAR_LINE); return m_pc_keyboard->read(); } return 0xff; } uint8_t tandy2k_state::clkmouse_r(offs_t offset) { uint8_t ret = 0; switch (offset) { case 0: if (!m_clkmouse_cnt) return 0; ret = m_clkmouse_cmd[--m_clkmouse_cnt]; m_pic1->ir2_w(0); if (m_clkmouse_cnt > 0) m_mcu_delay->adjust(attotime::from_msec(1)); break; case 2: ret = m_buttons->read(); if (m_clkmouse_cnt) ret |= 1; break; } return ret; } void tandy2k_state::clkmouse_w(offs_t offset, uint8_t data) { switch (offset) { case 0: m_pic1->ir2_w(0); if (m_clkmouse_cnt < 8) m_clkmouse_cmd[m_clkmouse_cnt++] = data; break; case 1: break; case 2: if (m_clkmouse_cnt < 8) m_clkmouse_cmd[m_clkmouse_cnt++] = data; switch (m_clkmouse_cmd[0]) { case 0x01: //set time break; case 0x02: //read time break; case 0x08: if(m_clkmouse_cmd[1] > 0) m_clkmouse_irq |= MO_IRQ; else m_clkmouse_irq &= ~MO_IRQ; if(m_clkmouse_cmd[2] > 0) m_clkmouse_irq |= BT_IRQ; else m_clkmouse_irq &= ~BT_IRQ; break; case 0x20: if(m_clkmouse_cmd[1] > 0) m_mouse_timer->adjust(attotime::from_hz(40), 0, attotime::from_hz(40)); else m_mouse_timer->adjust(attotime::never); break; } m_clkmouse_cnt = 0; break; case 3: m_pic1->ir2_w(0); m_clkmouse_cnt = 0; m_clkmouse_irq = 0; m_mouse_x = m_x_axis->read(); m_mouse_y = m_y_axis->read(); break; } } uint8_t tandy2k_state::fldtc_r() { if (LOG) logerror("FLDTC\n"); fldtc_w(0); return 0; } void tandy2k_state::fldtc_w(uint8_t data) { m_fdc->tc_w(1); m_fdc->tc_w(false); } void tandy2k_state::addr_ctrl_w(uint8_t data) { /* bit signal description 8 A15 A15 of video access 9 A16 A16 of video access 10 A17 A17 of video access 11 A18 A18 of video access 12 A19 A19 of video access 13 CLKSP0 clock speed (0 = 22.4 MHz, 1 = 28 MHz) 14 CLKCNT dots/char (0 = 10 [800x400], 1 = 8 [640x400]) 15 VIDOUTS selects the video source for display on monochrome monitor */ if (LOG) logerror("Address Control %02x\n", data); // video access m_vram_base = data & 0x1f; // video clock speed int clkspd = BIT(data, 5); int clkcnt = BIT(data, 6); if (m_clkspd != clkspd || m_clkcnt != clkcnt) { const XTAL busdotclk = 16_MHz_XTAL * 28 / (clkspd ? 16 : 20); const XTAL vidcclk = busdotclk / (clkcnt ? 8 : 10); m_vpac->set_character_width(clkcnt ? 8 : 10); m_vpac->set_unscaled_clock(vidcclk); m_vac->set_unscaled_clock(busdotclk); m_timer_vidldsh->adjust(attotime::from_hz(vidcclk), 0, attotime::from_hz(vidcclk)); m_clkspd = clkspd; m_clkcnt = clkcnt; } // video source select m_vidouts = BIT(data, 7); } // Memory Maps void tandy2k_state::vrambank_mem(address_map &map) { map(0x00000, 0x17fff).ram().share("hires_ram"); map(0x18000, 0x1ffff).noprw(); } void tandy2k_state::tandy2k_mem(address_map &map) { map.unmap_value_high(); map(0xe0000, 0xe7fff).rw(m_vrambank, FUNC(address_map_bank_device::read16), FUNC(address_map_bank_device::write16)); map(0xf8000, 0xfbfff).rw(FUNC(tandy2k_state::char_ram_r), FUNC(tandy2k_state::char_ram_w)).umask16(0x00ff); map(0xfc000, 0xfdfff).mirror(0x2000).rom().region(I80186_TAG, 0); } void tandy2k_state::tandy2k_io(address_map &map) { map.unmap_value_high(); map(0x00000, 0x00000).mirror(0x8).rw(FUNC(tandy2k_state::enable_r), FUNC(tandy2k_state::enable_w)); map(0x00002, 0x00002).mirror(0x8).w(FUNC(tandy2k_state::dma_mux_w)); map(0x00004, 0x00004).mirror(0x8).rw(FUNC(tandy2k_state::fldtc_r), FUNC(tandy2k_state::fldtc_w)); map(0x00010, 0x00013).mirror(0xc).rw(m_uart, FUNC(i8251_device::read), FUNC(i8251_device::write)).umask16(0x00ff); map(0x00030, 0x00033).mirror(0xc).m(m_fdc, FUNC(i8272a_device::map)).umask16(0x00ff); map(0x00040, 0x00047).mirror(0x8).rw(m_pit, FUNC(pit8253_device::read), FUNC(pit8253_device::write)).umask16(0x00ff); map(0x00050, 0x00057).mirror(0x8).rw(m_i8255a, FUNC(i8255_device::read), FUNC(i8255_device::write)).umask16(0x00ff); map(0x00052, 0x00052).mirror(0x8).r(FUNC(tandy2k_state::kbint_clr_r)); map(0x00060, 0x00063).mirror(0xc).rw(m_pic0, FUNC(pic8259_device::read), FUNC(pic8259_device::write)).umask16(0x00ff); map(0x00070, 0x00073).mirror(0xc).rw(m_pic1, FUNC(pic8259_device::read), FUNC(pic8259_device::write)).umask16(0x00ff); map(0x00080, 0x00080).mirror(0xe).rw(m_fdc, FUNC(i8272a_device::dma_r), FUNC(i8272a_device::dma_w)); map(0x00100, 0x0017f).rw(m_vpac, FUNC(crt9007_device::read), FUNC(crt9007_device::write)).umask16(0x00ff); map(0x00100, 0x0017f).w(FUNC(tandy2k_state::addr_ctrl_w)).umask16(0xff00); map(0x00180, 0x00180).r(FUNC(tandy2k_state::hires_status_r)).umask16(0x00ff); map(0x00180, 0x0018f).mirror(0x10).w(m_colpal, FUNC(palette_device::write8)).umask16(0x00ff).share("colpal"); map(0x001a0, 0x001a0).w(FUNC(tandy2k_state::hires_plane_w)).umask16(0x00ff); map(0x002fc, 0x002ff).rw(FUNC(tandy2k_state::clkmouse_r), FUNC(tandy2k_state::clkmouse_w)); } void tandy2k_state::tandy2k_hd_io(address_map &map) { tandy2k_io(map); // map(0x000e0, 0x000ff).w(FUNC(tandy2k_state::hdc_dack_w).umask16(0x00ff)); // map(0x0026c, 0x0026c).rw(WD1010_TAG, FUNC(wd1010_device::hdc_reset_r), FUNC(wd1010_device::hdc_reset_w)); // map(0x0026e, 0x0027e).rw(WD1010_TAG, FUNC(wd1010_device::wd1010_r), FUNC(wd1010_device::wd1010_w)); } void tandy2k_state::vpac_mem(address_map &map) { map(0x0000, 0x3fff).r(FUNC(tandy2k_state::videoram_r)); } // Input Ports static INPUT_PORTS_START( tandy2k ) // defined in machine/tandy2kb.c PORT_START("MOUSEBTN") PORT_BIT( 0xff8f, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_CODE(MOUSECODE_BUTTON1) PORT_CHANGED_MEMBER(DEVICE_SELF, tandy2k_state, input_changed, 1) PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_CODE(MOUSECODE_BUTTON2) PORT_CHANGED_MEMBER(DEVICE_SELF, tandy2k_state, input_changed, 1) PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_UNUSED ) /* this would be button three but AFAIK no tandy mouse ever had one */ PORT_START("MOUSEX") PORT_BIT( 0xffff, 0x00, IPT_MOUSE_X ) PORT_SENSITIVITY(50) PORT_KEYDELTA(0) PORT_CHANGED_MEMBER(DEVICE_SELF, tandy2k_state, input_changed, 0) PORT_START("MOUSEY") PORT_BIT( 0xffff, 0x00, IPT_MOUSE_Y ) PORT_SENSITIVITY(50) PORT_KEYDELTA(0) PORT_CHANGED_MEMBER(DEVICE_SELF, tandy2k_state, input_changed, 0) INPUT_PORTS_END static INPUT_PORTS_START( tandy2kb_hle ) PORT_INCLUDE(pc_keyboard) PORT_MODIFY("pc_keyboard_2") PORT_BIT(0x0200, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Cursor Up") PORT_CODE(KEYCODE_UP) /* 29 A9 */ PORT_BIT(0x0800, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Cursor Left") PORT_CODE(KEYCODE_LEFT) /* 2B AB */ PORT_MODIFY("pc_keyboard_3") PORT_BIT(0x0400, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Caps") PORT_CODE(KEYCODE_CAPSLOCK) PORT_TOGGLE /* Caps Lock 3A BA */ PORT_MODIFY("pc_keyboard_4") PORT_BIT(0x0020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("NumLock") PORT_CODE(KEYCODE_NUMLOCK) PORT_TOGGLE /* Num Lock 45 C5 */ /* Hold corresponds to Scroll Lock, but pauses the system when pressed - leaving unmapped by default to avoid conflicting with the UI Toggle key */ PORT_BIT(0x0040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Hold") /* 46 C6 */ PORT_BIT(0x0080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("KP 7 \\") PORT_CODE(KEYCODE_7_PAD) /* Keypad 7 47 C7 */ PORT_BIT(0x0100, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("KP 8 ~") PORT_CODE(KEYCODE_8_PAD) /* Keypad 8 48 C8 */ PORT_BIT(0x0200, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("KP 9 (PgUp)") PORT_CODE(KEYCODE_9_PAD) /* Keypad 9 (PgUp) 49 C9 */ PORT_BIT(0x0400, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Cursor Down") PORT_CODE(KEYCODE_DOWN) /* 4A CA */ PORT_BIT(0x0800, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("KP 4 |") PORT_CODE(KEYCODE_4_PAD) /* Keypad 4 4B CB */ PORT_BIT(0x2000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("KP 6") PORT_CODE(KEYCODE_6_PAD) /* Keypad 6 4D CD */ PORT_BIT(0x4000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Cursor Right") PORT_CODE(KEYCODE_RIGHT) /* 4E CE */ PORT_BIT(0x8000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("KP 1 (End)") PORT_CODE(KEYCODE_1_PAD) /* Keypad 1 (End) 4F CF */ PORT_MODIFY("pc_keyboard_5") PORT_BIT(0x0001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("KP 2 `") PORT_CODE(KEYCODE_2_PAD) /* Keypad 2 50 D0 */ PORT_BIT(0x0002, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("KP 3 (PgDn)") PORT_CODE(KEYCODE_3_PAD) /* Keypad 3 (PgDn) 51 D1 */ PORT_BIT(0x0004, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("KP 0") PORT_CODE(KEYCODE_0_PAD) /* Keypad 0 52 D2 */ PORT_BIT(0x0008, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("KP - (Del)") PORT_CODE(KEYCODE_MINUS_PAD) /* - Delete 53 D3 */ PORT_BIT(0x0010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Break") PORT_CODE(KEYCODE_STOP) /* Break 54 D4 */ PORT_BIT(0x0020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("+ Insert") PORT_CODE(KEYCODE_PLUS_PAD) /* + Insert 55 D5 */ PORT_BIT(0x0040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME(".") PORT_CODE(KEYCODE_DEL_PAD) /* . 56 D6 */ PORT_BIT(0x0080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Enter") PORT_CODE(KEYCODE_ENTER_PAD) /* Enter 57 D7 */ PORT_BIT(0x0100, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Home") PORT_CODE(KEYCODE_HOME) /* HOME 58 D8 */ PORT_BIT(0x0200, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F11") PORT_CODE(KEYCODE_F11) /* F11 59 D9 */ PORT_BIT(0x0400, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F12") PORT_CODE(KEYCODE_F12) /* F12 5a Da */ INPUT_PORTS_END class tandy2kb_hle_device : public pc_keyboard_device { public: tandy2kb_hle_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0); protected: virtual ioport_constructor device_input_ports() const override; }; DEFINE_DEVICE_TYPE(TANDY2K_HLE_KEYB, tandy2kb_hle_device, "tandy2kb_hle", "Tandy 2000 Keyboard HLE") tandy2kb_hle_device::tandy2kb_hle_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : pc_keyboard_device(mconfig, TANDY2K_HLE_KEYB, tag, owner, clock) { m_type = KEYBOARD_TYPE::PC; } ioport_constructor tandy2kb_hle_device::device_input_ports() const { return INPUT_PORTS_NAME(tandy2kb_hle); } INPUT_CHANGED_MEMBER(tandy2k_state::input_changed) { if (m_clkmouse_cnt || !m_clkmouse_irq) return; const bool is_button = bool(param); if ((m_clkmouse_irq & BT_IRQ) && is_button) { m_clkmouse_cnt = 1; m_clkmouse_cmd[0] = 'B'; } else if ((m_clkmouse_irq & MO_IRQ)) { uint16_t x = m_x_axis->read(); uint16_t y = m_y_axis->read(); uint16_t dx = x - m_mouse_x; uint16_t dy = y - m_mouse_y; m_mouse_x = x; m_mouse_y = y; m_clkmouse_cnt = 5; m_clkmouse_cmd[4] = 'M'; m_clkmouse_cmd[3] = dx & 0xff; m_clkmouse_cmd[2] = dx >> 8; m_clkmouse_cmd[1] = dy & 0xff; m_clkmouse_cmd[0] = dy >> 8; } m_pic1->ir2_w(1); } // Video uint32_t tandy2k_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) { const pen_t *cpen = m_colpal->pens(); address_space &program = m_maincpu->space(AS_PROGRAM); for (int y = 0; y < 400; y++) { uint8_t cgra = y % 16; for (int sx = 0; sx < 80; sx++) { if (m_hires_en & 2) { uint8_t a = ((uint8_t *)m_hires_ram.target())[(y * 80) + sx]; uint8_t b = ((uint8_t *)m_hires_ram.target())[(y * 80) + sx + 0x8000]; uint8_t c = ((uint8_t *)m_hires_ram.target())[(y * 80) + sx + 0x8000 * 2]; for (int x = 0; x < 8; x++) { int color = BIT(a, x) | (BIT(b, x) << 1) | (BIT(c, x) << 2); bitmap.pix(y, (sx * 8) + (7 - x)) = cpen[color]; } } else { offs_t addr = m_ram->size() - 0x1400 + (((y / 16) * 80) + sx) * 2; uint16_t vidla = program.read_word(addr); uint8_t attr = vidla >> 8; uint8_t data = m_char_ram[((vidla & 0xff) << 4) | cgra]; if(attr & 0x80) data = ~data; for (int x = 0; x < 8; x++) { int color = 4 | (BIT(attr, 6) << 1) | BIT(data, 7); bitmap.pix(y, (sx * 8) + x) = cpen[color]; data <<= 1; } } } } return 0; } WRITE_LINE_MEMBER( tandy2k_state::vpac_vlt_w ) { m_drb0->ren_w(state); m_drb0->clrcnt_w(state); m_drb1->ren_w(state); m_drb1->clrcnt_w(state); } WRITE_LINE_MEMBER( tandy2k_state::vpac_drb_w ) { m_drb0->tog_w(state); m_drb1->tog_w(state); } WRITE_LINE_MEMBER( tandy2k_state::vpac_wben_w ) { m_drb0->wen1_w(state); m_drb1->wen1_w(state); } WRITE_LINE_MEMBER( tandy2k_state::vpac_cblank_w ) { m_cblank = state; } WRITE_LINE_MEMBER( tandy2k_state::vpac_slg_w ) { m_slg = state; m_vac->slg_w(state); } WRITE_LINE_MEMBER( tandy2k_state::vpac_sld_w ) { m_sld = state; m_vac->sld_w(state); } void tandy2k_state::hires_plane_w(uint8_t data) { int bank = 3; if (((data & 1) + ((data >> 1) & 1) + ((data >> 2) & 1)) == 1) bank = (data & 1) ? 0 : (data & 2) ? 1 : (data & 4) ? 2 : 0; m_vrambank->set_bank(bank); m_hires_en = (data >> 4) & 3; } // bit 0 - 0 = hires board installed // bit 1 - 0 = 1 plane, 1 = 3 planes // bit 2-4 - board rev uint8_t tandy2k_state::hires_status_r() { return 2; } void tandy2k_state::vidla_w(uint8_t data) { m_vidla = data; } void tandy2k_state::drb_attr_w(uint8_t data) { /* bit description 0 BLC -> DBLC (delayed 2 CCLKs) 1 BKC -> DBKC (delayed 2 CCLKs) 2 CHABL 3 MS0 4 MS1 5 BLINK 6 INT 7 REVID */ m_blc = BIT(data, 0); m_bkc = BIT(data, 1); m_vac->chabl_w(BIT(data, 2)); m_vac->ms0_w(BIT(data, 3)); m_vac->ms1_w(BIT(data, 4)); m_vac->blink_w(BIT(data, 5)); m_vac->intin_w(BIT(data, 6)); m_vac->revid_w(BIT(data, 7)); } CRT9021_DRAW_CHARACTER_MEMBER( tandy2k_state::vac_draw_character ) { const pen_t *pen = m_colpal->pens(); for (int i = 0; i < 8; i++) { int color = BIT(video, 7 - i); bitmap.pix(y, x++) = pen[color]; } } TIMER_DEVICE_CALLBACK_MEMBER( tandy2k_state::vidldsh_tick ) { m_drb0->rclk_w(0); m_drb0->wclk_w(0); m_drb1->rclk_w(0); m_drb1->wclk_w(0); m_vac->ld_sh_w(0); // 1 busdotclk later m_vac->blc_w(BIT(m_dblc, 0)); m_dblc >>= 1; m_dblc |= m_blc << 2; m_vac->bkc_w(BIT(m_dbkc, 0)); m_dbkc >>= 1; m_dbkc |= m_bkc << 2; m_vac->retbl_w(BIT(m_dblank, 0)); m_dblank >>= 1; m_dblank |= m_cblank << 2; if (!m_slg) { m_cgra >>= 1; m_cgra |= m_sld << 3; } uint8_t vidd = m_char_ram[(m_vidla << 4) | m_cgra]; m_vac->write(vidd); m_drb0->rclk_w(1); m_drb0->wclk_w(1); m_drb1->rclk_w(1); m_drb1->wclk_w(1); m_vac->ld_sh_w(1); } // Intel 8251A Interface WRITE_LINE_MEMBER( tandy2k_state::rxrdy_w ) { m_rxrdy = state; m_pic0->ir2_w(m_rxrdy || m_txrdy); } WRITE_LINE_MEMBER( tandy2k_state::txrdy_w ) { m_txrdy = state; m_pic0->ir2_w(m_rxrdy || m_txrdy); } // Intel 8253 Interface WRITE_LINE_MEMBER( tandy2k_state::outspkr_w ) { m_outspkr = state; speaker_update(); } WRITE_LINE_MEMBER( tandy2k_state::intbrclk_w ) { if (!m_extclk) { m_uart->write_txc(state); m_uart->write_rxc(state); } } WRITE_LINE_MEMBER( tandy2k_state::rfrqpulse_w ) { // memory refresh counter up } // Intel 8255A Interface WRITE_LINE_MEMBER( tandy2k_state::write_centronics_ack ) { m_centronics_ack = state; m_i8255a->pc6_w(state); } WRITE_LINE_MEMBER( tandy2k_state::write_centronics_busy ) { m_centronics_busy = state; } WRITE_LINE_MEMBER( tandy2k_state::write_centronics_perror ) { m_centronics_perror = state; } WRITE_LINE_MEMBER( tandy2k_state::write_centronics_select ) { m_centronics_select = state; } WRITE_LINE_MEMBER( tandy2k_state::write_centronics_fault ) { m_centronics_fault = state; } uint8_t tandy2k_state::ppi_pb_r() { /* bit signal description 0 LPRIN0 auxiliary input 0 1 LPRIN1 auxiliary input 1 2 LPRIN2 auxiliary input 2 3 _LPRACK acknowledge 4 _LPRFLT fault 5 _LPRSEL select 6 LPRPAEM paper empty 7 LPRBSY busy */ uint8_t data = 0; switch (m_pb_sel) { case LPINEN: // printer acknowledge data |= m_centronics_ack << 3; // printer fault data |= m_centronics_fault << 4; // printer select data |= m_centronics_select << 5; // paper empty data |= m_centronics_perror << 6; // printer busy data |= m_centronics_busy << 7; break; case KBDINEN: // keyboard data data = m_kbdin; break; case PORTINEN: // PCB revision data = 0x03; break; } return data; } void tandy2k_state::ppi_pc_w(uint8_t data) { /* bit signal description 0 port A direction 1 port B input select bit 0 2 port B input select bit 1 3 LPRINT13 interrupt 4 STROBE IN 5 INBUFFULL 6 _LPRACK 7 _LPRDATSTB */ // input select m_pb_sel = (data >> 1) & 0x03; // interrupt m_pic1->ir3_w(BIT(data, 3)); // printer strobe m_centronics->write_strobe(BIT(data, 7)); } // Intel 8259 Interfaces /* IR0 MEMINT00 IR1 TMOINT01 IR2 SERINT02 IR3 BUSINT03 IR4 FLDINT04 IR5 BUSINT05 IR6 HDCINT06 IR7 BUSINT07 */ /* IR0 KBDINT10 IR1 VIDINT11 IR2 RATINT12 IR3 LPRINT13 IR4 MCPINT14 IR5 MEMINT15 IR6 DMEINT16 IR7 BUSINT17 */ // Intel 8272 Interface WRITE_LINE_MEMBER( tandy2k_state::fdc_drq_w ) { dma_request(0, state); } WRITE_LINE_MEMBER( tandy2k_state::fdc_hdl_w ) { m_floppy0->mon_w(!state); m_floppy1->mon_w(!state); } void tandy2k_state::floppy_formats(format_registration &fr) { fr.add_mfm_containers(); fr.add(FLOPPY_TANDY_2000_FORMAT); } static void tandy2k_floppies(device_slot_interface &device) { device.option_add("525qd", FLOPPY_525_QD); } // Keyboard WRITE_LINE_MEMBER( tandy2k_state::kbdclk_w ) { if (!m_kbdclk && state) { m_kbdin >>= 1; m_kbdin |= m_kb->data_r() << 7; } m_kbdclk = state; } WRITE_LINE_MEMBER( tandy2k_state::kbddat_w ) { if (!m_kbddat && state) { m_kb->busy_w(m_kbdclk); m_pic1->ir0_w(!m_kbdclk); } m_kbddat = state; } uint8_t tandy2k_state::irq_callback(offs_t offset) { return (offset ? m_pic1 : m_pic0)->acknowledge(); } // Machine Initialization void tandy2k_state::machine_start() { address_space &program = m_maincpu->space(AS_PROGRAM); uint8_t *ram = m_ram->pointer(); int ram_size = m_ram->size(); program.install_ram(0x00000, ram_size - 1, ram); m_mouse_timer = timer_alloc(FUNC(tandy2k_state::update_mouse), this); m_mcu_delay = timer_alloc(FUNC(tandy2k_state::mcu_delay_cb), this); // register for state saving save_item(NAME(m_dma_mux)); save_item(NAME(m_kbdclk)); save_item(NAME(m_kbddat)); save_item(NAME(m_kbdin)); save_item(NAME(m_extclk)); save_item(NAME(m_rxrdy)); save_item(NAME(m_txrdy)); save_item(NAME(m_pb_sel)); save_item(NAME(m_vidouts)); save_item(NAME(m_clkspd)); save_item(NAME(m_clkcnt)); save_item(NAME(m_outspkr)); save_item(NAME(m_spkrdata)); save_item(NAME(m_clkmouse_cmd)); save_item(NAME(m_clkmouse_cnt)); save_item(NAME(m_clkmouse_irq)); save_item(NAME(m_mouse_x)); save_item(NAME(m_mouse_y)); save_item(NAME(m_hires_en)); } void tandy2k_state::machine_reset() { m_hires_en = 0; m_clkmouse_cnt = 0; m_clkmouse_irq = 0; } void tandy2k_state::device_reset_after_children() { m_pc_keyboard->enable(0); } TIMER_CALLBACK_MEMBER(tandy2k_state::update_mouse) { uint16_t x = m_x_axis->read(); uint16_t y = m_y_axis->read(); uint16_t dx = x - m_mouse_x; uint16_t dy = y - m_mouse_y; m_mouse_x = x; m_mouse_y = y; m_clkmouse_cnt = 5; m_clkmouse_cmd[4] = 'A'; m_clkmouse_cmd[3] = dx & 0xff; m_clkmouse_cmd[2] = dx >> 8; m_clkmouse_cmd[1] = dy & 0xff; m_clkmouse_cmd[0] = dy >> 8; m_pic1->ir2_w(1); } TIMER_CALLBACK_MEMBER(tandy2k_state::mcu_delay_cb) { m_pic1->ir2_w(1); } rgb_t tandy2k_state::IRGB(uint32_t raw) { uint8_t i = (raw >> 3) & 1; return rgb_t(pal2bit(((raw & 4) >> 1) | i), pal2bit((raw & 2) | i), pal2bit(((raw & 1) << 1) | i)); } // Machine Driver void tandy2k_state::tandy2k(machine_config &config) { // basic machine hardware I80186(config, m_maincpu, 16_MHz_XTAL); m_maincpu->set_addrmap(AS_PROGRAM, &tandy2k_state::tandy2k_mem); m_maincpu->set_addrmap(AS_IO, &tandy2k_state::tandy2k_io); m_maincpu->read_slave_ack_callback().set(FUNC(tandy2k_state::irq_callback)); // video hardware screen_device &screen(SCREEN(config, SCREEN_TAG, SCREEN_TYPE_RASTER)); screen.set_refresh_hz(50); screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); // not accurate screen.set_size(640, 400); screen.set_visarea(0, 640-1, 0, 400-1); //screen.set_screen_update(CRT9021B_TAG, FUNC(crt9021_device::screen_update)); screen.set_screen_update(FUNC(tandy2k_state::screen_update)); PALETTE(config, m_colpal).set_format(1, &tandy2k_state::IRGB, 8); crt9007_device &vpac(CRT9007(config, CRT9007_TAG, 16_MHz_XTAL * 28 / 20 / 8)); vpac.set_addrmap(0, &tandy2k_state::vpac_mem); vpac.set_character_width(8); vpac.int_callback().set(I8259A_1_TAG, FUNC(pic8259_device::ir1_w)); vpac.vs_callback().set(CRT9021B_TAG, FUNC(crt9021_device::vsync_w)); vpac.vlt_callback().set(FUNC(tandy2k_state::vpac_vlt_w)); vpac.curs_callback().set(CRT9021B_TAG, FUNC(crt9021_device::cursor_w)); vpac.drb_callback().set(FUNC(tandy2k_state::vpac_drb_w)); vpac.wben_callback().set(FUNC(tandy2k_state::vpac_wben_w)); vpac.cblank_callback().set(FUNC(tandy2k_state::vpac_cblank_w)); vpac.slg_callback().set(FUNC(tandy2k_state::vpac_slg_w)); vpac.sld_callback().set(FUNC(tandy2k_state::vpac_sld_w)); vpac.set_screen(SCREEN_TAG); CRT9212(config, m_drb0, 0); m_drb0->set_wen2(1); m_drb0->dout().set(FUNC(tandy2k_state::vidla_w)); CRT9212(config, m_drb1, 0); m_drb1->set_wen2(1); m_drb1->dout().set(FUNC(tandy2k_state::drb_attr_w)); CRT9021(config, m_vac, 16_MHz_XTAL * 28 / 20); m_vac->set_screen(SCREEN_TAG); ADDRESS_MAP_BANK(config, m_vrambank).set_map(&tandy2k_state::vrambank_mem).set_options(ENDIANNESS_LITTLE, 16, 17, 0x8000); TIMER(config, "vidldsh").configure_generic(FUNC(tandy2k_state::vidldsh_tick)); // sound hardware SPEAKER(config, "mono").front_center(); SPEAKER_SOUND(config, m_speaker).add_route(ALL_OUTPUTS, "mono", 0.25); // devices I8255A(config, m_i8255a); m_i8255a->out_pa_callback().set("cent_data_out", FUNC(output_latch_device::write)); m_i8255a->in_pb_callback().set(FUNC(tandy2k_state::ppi_pb_r)); m_i8255a->out_pc_callback().set(FUNC(tandy2k_state::ppi_pc_w)); I8251(config, m_uart, 0); m_uart->txd_handler().set(m_rs232, FUNC(rs232_port_device::write_txd)); m_uart->dtr_handler().set(m_rs232, FUNC(rs232_port_device::write_dtr)); m_uart->rts_handler().set(m_rs232, FUNC(rs232_port_device::write_rts)); m_uart->rxrdy_handler().set(FUNC(tandy2k_state::rxrdy_w)); m_uart->txrdy_handler().set(FUNC(tandy2k_state::txrdy_w)); RS232_PORT(config, m_rs232, default_rs232_devices, nullptr); m_rs232->rxd_handler().set(m_uart, FUNC(i8251_device::write_rxd)); m_rs232->dsr_handler().set(m_uart, FUNC(i8251_device::write_dsr)); // TODO pin 15 external transmit clock // TODO pin 17 external receiver clock PIT8253(config, m_pit, 0); m_pit->set_clk<0>(16_MHz_XTAL / 16); m_pit->out_handler<0>().set(FUNC(tandy2k_state::outspkr_w)); m_pit->set_clk<1>(16_MHz_XTAL / 8); m_pit->out_handler<1>().set(FUNC(tandy2k_state::intbrclk_w)); //m_pit->set_clk<2>(16_MHz_XTAL / 8); //m_pit->out_handler<2>().set(FUNC(tandy2k_state::rfrqpulse_w)); PIC8259(config, m_pic0, 0); m_pic0->out_int_callback().set(m_maincpu, FUNC(i80186_cpu_device::int0_w)); PIC8259(config, m_pic1, 0); m_pic1->out_int_callback().set(m_maincpu, FUNC(i80186_cpu_device::int1_w)); I8272A(config, m_fdc, 16_MHz_XTAL / 4, true); m_fdc->set_select_lines_connected(true); m_fdc->intrq_wr_callback().set(m_pic0, FUNC(pic8259_device::ir4_w)); m_fdc->drq_wr_callback().set(FUNC(tandy2k_state::fdc_drq_w)); m_fdc->hdl_wr_callback().set(FUNC(tandy2k_state::fdc_hdl_w)); FLOPPY_CONNECTOR(config, I8272A_TAG ":0", tandy2k_floppies, "525qd", tandy2k_state::floppy_formats); FLOPPY_CONNECTOR(config, I8272A_TAG ":1", tandy2k_floppies, "525qd", tandy2k_state::floppy_formats); CENTRONICS(config, m_centronics, centronics_devices, "printer"); m_centronics->ack_handler().set(FUNC(tandy2k_state::write_centronics_ack)); m_centronics->busy_handler().set(FUNC(tandy2k_state::write_centronics_busy)); m_centronics->perror_handler().set(FUNC(tandy2k_state::write_centronics_perror)); m_centronics->select_handler().set(FUNC(tandy2k_state::write_centronics_select)); m_centronics->fault_handler().set(FUNC(tandy2k_state::write_centronics_fault)); output_latch_device ¢_data_out(OUTPUT_LATCH(config, "cent_data_out")); m_centronics->set_output_latch(cent_data_out); TANDY2K_KEYBOARD(config, m_kb, 0); m_kb->clock_wr_callback().set(FUNC(tandy2k_state::kbdclk_w)); m_kb->data_wr_callback().set(FUNC(tandy2k_state::kbddat_w)); // temporary until the tandy keyboard has a rom dump TANDY2K_HLE_KEYB(config, m_pc_keyboard, 0).keypress().set(I8259A_1_TAG, FUNC(pic8259_device::ir0_w)); // software lists SOFTWARE_LIST(config, "flop_list").set_original("tandy2k"); // internal ram RAM(config, RAM_TAG).set_default_size("128K").set_extra_options("256K,384K,512K,640K,768K,896K"); } void tandy2k_state::tandy2k_hd(machine_config &config) { tandy2k(config); // basic machine hardware m_maincpu->set_addrmap(AS_IO, &tandy2k_state::tandy2k_hd_io); // Tandon TM502 hard disk HARDDISK(config, "harddisk0", 0); //MCFG_WD1010_ADD(WD1010_TAG, wd1010_intf) //MCFG_WD1100_11_ADD(WD1100_11_TAG, wd1100_11_intf) } // ROMs ROM_START( tandy2k ) ROM_REGION( 0x2000, I80186_TAG, 0 ) ROM_LOAD16_BYTE( "484a00.u48", 0x0000, 0x1000, CRC(a5ee3e90) SHA1(4b1f404a4337c67065dd272d62ff88dcdee5e34b) ) ROM_LOAD16_BYTE( "474600.u47", 0x0001, 0x1000, CRC(345701c5) SHA1(a775cbfa110b7a88f32834aaa2a9b868cbeed25b) ) ROM_REGION( 0x100, "plds", 0 ) ROM_LOAD( "82s153.u62", 0x000, 0x100, NO_DUMP ) // interrupt/DMA ROM_LOAD( "82s153.u68", 0x000, 0x100, NO_DUMP ) // video ROM_LOAD( "82s153.u95", 0x000, 0x100, NO_DUMP ) // memory timing ROM_LOAD( "pal10l8.u82", 0x000, 0x100, NO_DUMP ) // video ROM_LOAD( "pal16l8a.u102", 0x000, 0x100, NO_DUMP ) // bus interface ROM_LOAD( "pal16l8a.u103", 0x000, 0x100, NO_DUMP ) // bus interface ROM_LOAD( "pal20l8.u103", 0x000, 0x100, NO_DUMP ) // bus interface, alternate ROM_LOAD( "pal16r6a.u16", 0x000, 0x100, NO_DUMP ) // HDC ROM_END #define rom_tandy2khd rom_tandy2k // System Drivers // YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS COMP( 1983, tandy2k, 0, 0, tandy2k, tandy2k, tandy2k_state, empty_init, "Tandy Radio Shack", "Tandy 2000", MACHINE_NOT_WORKING ) COMP( 1983, tandy2khd, tandy2k, 0, tandy2k_hd, tandy2k, tandy2k_state, empty_init, "Tandy Radio Shack", "Tandy 2000HD", MACHINE_NOT_WORKING )