// license: BSD-3-Clause // copyright-holders: Dirk Best /**************************************************************************** Digilog 320 Protocol analyzer Hardware: PCB 24-0710-02B: - Speaker - XTAL 1.344 MHz - R80186-10 - XTAL 20 MHz - DS1241 - HM62256LP-15 x4 - AT27C512R x6 PCB 24-0706-02C: - MB8877A - FDC9229BT - XTAL 16 MHz - P8251A - XTAL 3.6864 MHz - SCN2681AC1N40 - HD46505SP-2 - HM6264ALP-12 x2 - AM27128DC "24-1140-00 A" - XTAL 5.659200 MHz - PAL labeled "20-1110-1 A" PCB 24-0709-02D: - XTAL 16 MHz - Z0840008PSC Z80 CPU - HM62256LP-12 - Z8530H-8PC x2 - AT27C256 "24-0196-01 C" - AM9519A-1PC - XTAL 2.688 MHz - XTAL 3.6864 MHz TODO: - Finish floppy hookup - SCC interrupts - Unknown DUART inputs/outputs - RS232 - RTC - Artwork with LEDs Notes: - Everything here guessed, no manuals available ****************************************************************************/ #include "emu.h" #include "cpu/i86/i186.h" #include "cpu/z80/z80.h" #include "machine/am9519.h" #include "machine/digilog_kbd.h" #include "machine/i8251.h" #include "machine/mc68681.h" #include "machine/nvram.h" #include "machine/wd_fdc.h" #include "machine/z80scc.h" #include "video/mc6845.h" #include "imagedev/floppy.h" #include "emupal.h" #include "screen.h" #include "softlist_dev.h" namespace { //************************************************************************** // TYPE DEFINITIONS //************************************************************************** class digilog320_state : public driver_device { public: digilog320_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_maincpu(*this, "maincpu"), m_subcpu(*this, "subcpu"), m_uic(*this, "uic"), m_crtc(*this, "crtc"), m_palette(*this, "palette"), m_duart(*this, "duart"), m_scc(*this, "scc%u", 0U), m_fdc(*this, "fdc"), m_floppy(*this, "fdc:0"), m_vram(*this, "vram"), m_chargen(*this, "chargen") { } void digilog320(machine_config &config); protected: virtual void machine_start() override; virtual void machine_reset() override; private: required_device m_maincpu; required_device m_subcpu; required_device m_uic; required_device m_crtc; required_device m_palette; required_device m_duart; required_device_array m_scc; required_device m_fdc; required_device m_floppy; required_shared_ptr m_vram; required_region_ptr m_chargen; void main_mem_map(address_map &map); void main_io_map(address_map &map); void sub_mem_map(address_map &map); void sub_io_map(address_map &map); MC6845_UPDATE_ROW(update_row); uint8_t fdc_r(offs_t offset); void fdc_w(offs_t offset, uint8_t data); void fdc_ctrl_w(uint8_t data); uint8_t subcpu_to_maincpu_r(); void maincpu_to_subcpu_w(uint8_t data); uint8_t maincpu_to_subcpu_r(); void subcpu_to_maincpu_w(uint8_t data); uint8_t maincpu_status_r(); uint8_t m_subcpu_to_maincpu = 0; uint8_t m_maincpu_to_subcpu = 0; uint8_t m_maincpu_status = 0; }; //************************************************************************** // ADDRESS MAPS //************************************************************************** void digilog320_state::main_mem_map(address_map &map) { map(0x00000, 0x1ffff).ram(); map(0x80000, 0x83fff).ram().share("vram"); map(0x90000, 0x91fff).ram().share("nvram"); map(0xa0000, 0xfffff).rom().region("maincpu", 0); } void digilog320_state::main_io_map(address_map &map) { map(0x000, 0x003).rw("usart", FUNC(i8251_device::read), FUNC(i8251_device::write)).umask16(0x00ff); map(0x080, 0x09f).rw(m_duart, FUNC(scn2681_device::read), FUNC(scn2681_device::write)).umask16(0x00ff); map(0x100, 0x107).rw(FUNC(digilog320_state::fdc_r), FUNC(digilog320_state::fdc_w)).umask16(0x00ff); map(0x180, 0x180).w(m_crtc, FUNC(mc6845_device::address_w)); map(0x182, 0x182).w(m_crtc, FUNC(mc6845_device::register_w)); map(0x200, 0x200).w(FUNC(digilog320_state::fdc_ctrl_w)); map(0x280, 0x280).rw(FUNC(digilog320_state::subcpu_to_maincpu_r), FUNC(digilog320_state::maincpu_to_subcpu_w)); } void digilog320_state::sub_mem_map(address_map &map) { map(0x0000, 0x7fff).rom().region("subcpu", 0); map(0x8000, 0xffff).ram(); } void digilog320_state::sub_io_map(address_map &map) { map.global_mask(0xff); map(0x00, 0x00).rw(m_uic, FUNC(am9519_device::data_r), FUNC(am9519_device::data_w)); map(0x01, 0x01).rw(m_uic, FUNC(am9519_device::stat_r), FUNC(am9519_device::cmd_w)); map(0x04, 0x07).rw(m_scc[0], FUNC(z80scc_device::dc_ab_r), FUNC(z80scc_device::dc_ab_w)); map(0x08, 0x0b).rw(m_scc[1], FUNC(z80scc_device::dc_ab_r), FUNC(z80scc_device::dc_ab_w)); map(0x10, 0x10).rw(FUNC(digilog320_state::maincpu_to_subcpu_r), FUNC(digilog320_state::subcpu_to_maincpu_w)); map(0x11, 0x11).r(FUNC(digilog320_state::maincpu_status_r)); } //************************************************************************** // VIDEO EMULATION //************************************************************************** MC6845_UPDATE_ROW( digilog320_state::update_row ) { pen_t const *const pen = m_palette->pens(); for (int x = 0; x < x_count; x++) { // attributes // 76------ unknown // --5----- half intensity // ---4---- unknown // ----3--- reverse // -----2-- unknown // ------10 chargen high bits uint16_t const data = (m_vram[ma + x]); uint8_t gfx = m_chargen[((data & 0x3ff) << 4) | ra]; uint8_t attr = data >> 8; if (x == cursor_x) gfx ^= 0xff; if (BIT(attr, 3)) gfx ^= 0xff; // foreground/background colors rgb_t fg = BIT(attr, 5) ? pen[1] : pen[2]; rgb_t bg = pen[0]; // draw 8 pixels of the character for (int i = 0; i < 8; i++) bitmap.pix(y, x * 8 + i) = BIT(gfx, i) ? fg : bg; } } static const gfx_layout char_layout = { 8, 12, RGN_FRAC(1, 1), 1, { 0 }, { 7, 6, 5, 4, 3, 2, 1, 0 }, { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8, 10*8, 11*8 }, 8 * 16 }; static GFXDECODE_START(chars) GFXDECODE_ENTRY("chargen", 0, char_layout, 0, 1) GFXDECODE_END //************************************************************************** // FLOPPY //************************************************************************** // either cpu too fast or fdc too slow, assume some waitstates to pass check uint8_t digilog320_state::fdc_r(offs_t offset) { m_maincpu->adjust_icount(-2); return m_fdc->read(offset); } void digilog320_state::fdc_w(offs_t offset, uint8_t data) { m_maincpu->adjust_icount(-2); m_fdc->write(offset, data); } void digilog320_state::fdc_ctrl_w(uint8_t data) { // 7654---- unknown (not used?) // ----3--- unknown (motor on?) // -----2-- side select // ------10 unknown (drive select?) logerror("fdc_ctrl_w: %02x\n", data); floppy_image_device *floppy = m_floppy->get_device(); m_fdc->set_floppy(floppy); if (floppy) { floppy->ss_w(BIT(data, 2)); // motor always on for now floppy->mon_w(0); } // set to mfm m_fdc->dden_w(0); } static void digilog320_floppies(device_slot_interface &device) { device.option_add("35dd", FLOPPY_35_DD); } //************************************************************************** // MACHINE EMULATION //************************************************************************** uint8_t digilog320_state::subcpu_to_maincpu_r() { logerror("subcpu_to_maincpu_r: %02x\n", m_subcpu_to_maincpu); m_maincpu_status &= ~0x40; m_duart->ip3_w(0); return m_subcpu_to_maincpu; } void digilog320_state::maincpu_to_subcpu_w(uint8_t data) { logerror("maincpu_to_subcpu_w: %02x\n", data); m_maincpu_to_subcpu = data; m_duart->ip0_w(1); m_uic->ireq4_w(0); } uint8_t digilog320_state::maincpu_to_subcpu_r() { logerror("maincpu_to_subcpu_r: %02x\n", m_maincpu_to_subcpu); m_duart->ip0_w(0); m_uic->ireq4_w(1); return m_maincpu_to_subcpu; } void digilog320_state::subcpu_to_maincpu_w(uint8_t data) { logerror("subcpu_to_maincpu_w: %02x\n", data); m_subcpu_to_maincpu = data; m_maincpu_status |= 0x40; m_duart->ip3_w(1); } uint8_t digilog320_state::maincpu_status_r() { // 7------- unknown // -6------ maincpu ready to receive data (0 = ready) // --543210 unknown return m_maincpu_status; } void digilog320_state::machine_start() { // register for save states save_item(NAME(m_subcpu_to_maincpu)); save_item(NAME(m_maincpu_to_subcpu)); save_item(NAME(m_maincpu_status)); } void digilog320_state::machine_reset() { m_maincpu_status = 0x00; } //************************************************************************** // MACHINE DEFINTIONS //************************************************************************** void digilog320_state::digilog320(machine_config &config) { I80186(config, m_maincpu, 20_MHz_XTAL); // R80186-10 m_maincpu->set_addrmap(AS_PROGRAM, &digilog320_state::main_mem_map); m_maincpu->set_addrmap(AS_IO, &digilog320_state::main_io_map); Z80(config, m_subcpu, 16_MHz_XTAL / 2); // Z0840008PSC m_subcpu->set_addrmap(AS_PROGRAM, &digilog320_state::sub_mem_map); m_subcpu->set_addrmap(AS_IO, &digilog320_state::sub_io_map); m_subcpu->set_irq_acknowledge_callback(m_uic, FUNC(am9519_device::iack_cb)); NVRAM(config, "nvram", nvram_device::DEFAULT_ALL_0); AM9519(config, m_uic, 0); m_uic->out_int_callback().set_inputline(m_subcpu, INPUT_LINE_IRQ0); screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER)); screen.set_raw(5.6592_MHz_XTAL, 320, 0, 256, 262, 0, 192); screen.set_screen_update(m_crtc, FUNC(mc6845_device::screen_update)); PALETTE(config, m_palette, palette_device::MONOCHROME_HIGHLIGHT); GFXDECODE(config, "gfxdecode", m_palette, chars); MC6845(config, m_crtc, 5.6592_MHz_XTAL / 8); // HD46505SP-2 m_crtc->set_char_width(8); m_crtc->set_show_border_area(false); m_crtc->set_update_row_callback(FUNC(digilog320_state::update_row)); SCN2681(config, m_duart, 3.6864_MHz_XTAL); m_duart->irq_cb().set(m_maincpu, FUNC(i80186_cpu_device::int0_w)); m_duart->outport_cb().set("usart", FUNC(i8251_device::write_txc)).bit(3); m_duart->outport_cb().append("usart", FUNC(i8251_device::write_rxc)).bit(3); I8251(config, "usart", 0); SCC8530N(config, m_scc[0], 3.6864_MHz_XTAL); SCC8530N(config, m_scc[1], 3.6864_MHz_XTAL); MB8877(config, m_fdc, 16_MHz_XTAL / 16); m_fdc->intrq_wr_callback().set(m_maincpu, FUNC(i80186_cpu_device::int3_w)); m_fdc->drq_wr_callback().set(m_maincpu, FUNC(i80186_cpu_device::drq1_w)); FLOPPY_CONNECTOR(config, "fdc:0", digilog320_floppies, "35dd", floppy_image_device::default_mfm_floppy_formats); SOFTWARE_LIST(config, "floppy_list").set_original("digilog320"); digilog_kbd_device &kbd(DIGILOG_KBD(config, "kbd")); kbd.tx_handler().set(m_duart, FUNC(scn2681_device::rx_a_w)); } //************************************************************************** // ROM DEFINITIONS //************************************************************************** ROM_START( digilog320 ) ROM_REGION(0x60000, "maincpu", 0) ROM_LOAD16_BYTE("24-0197-01_e.u33", 0x00000, 0x10000, CRC(d1be8c1f) SHA1(5cef9d54e341da4cfa6ca50939c889c6d502240a)) ROM_LOAD16_BYTE("24-0197-02_e.u24", 0x00001, 0x10000, CRC(1bbe293d) SHA1(69d22456e6b20fc3ce1c5208af169310e414e955)) ROM_LOAD16_BYTE("24-0197-03_e.u34", 0x20000, 0x10000, CRC(d492b6fd) SHA1(474220128e63133eeb8591401edb3ad65d71e027)) ROM_LOAD16_BYTE("24-0197-04_e.u25", 0x20001, 0x10000, CRC(a5667746) SHA1(ebecd69ebf394365e9bedfcbe98d71ce4ec7feb1)) ROM_LOAD16_BYTE("24-0197-05_e.u35", 0x40000, 0x10000, CRC(17273a19) SHA1(0c28b304e1447d4afd821b3b1a4fb6029bf2a24d)) ROM_LOAD16_BYTE("24-0197-06_e.u26", 0x40001, 0x10000, CRC(cb29ca28) SHA1(8827de70c006250ba2989c4dc57e402ed222f948)) ROM_REGION(0x8000, "subcpu", 0) ROM_LOAD("24-0196-01_c.u12", 0x0000, 0x8000, CRC(20291d21) SHA1(1151414531040af59f4f692aab31bfc04e7fc56c)) ROM_REGION(0x4000, "chargen", 0) ROM_LOAD("24-1140-00_a.bin", 0x0000, 0x4000, CRC(7a4d0b82) SHA1(15952655cef77918a76c0c268b749be34b28634b)) ROM_END } // anonymous namespace //************************************************************************** // SYSTEM DRIVERS //************************************************************************** // YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS COMP( 1988, digilog320, 0, 0, digilog320, 0, digilog320_state, empty_init, "Digilog", "320", MACHINE_NOT_WORKING | MACHINE_SUPPORTS_SAVE )