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Diffstat (limited to 'src/mame/skeleton/digilog320.cpp')
-rw-r--r-- | src/mame/skeleton/digilog320.cpp | 435 |
1 files changed, 435 insertions, 0 deletions
diff --git a/src/mame/skeleton/digilog320.cpp b/src/mame/skeleton/digilog320.cpp new file mode 100644 index 00000000000..3286933c781 --- /dev/null +++ b/src/mame/skeleton/digilog320.cpp @@ -0,0 +1,435 @@ +// 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 "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 ATTR_COLD; + virtual void machine_reset() override ATTR_COLD; + +private: + required_device<i80186_cpu_device> m_maincpu; + required_device<z80_device> m_subcpu; + required_device<am9519_device> m_uic; + required_device<mc6845_device> m_crtc; + required_device<palette_device> m_palette; + required_device<scn2681_device> m_duart; + required_device_array<scc8530_device, 2> m_scc; + required_device<mb8877_device> m_fdc; + required_device<floppy_connector> m_floppy; + required_shared_ptr<uint16_t> m_vram; + required_region_ptr<uint8_t> m_chargen; + + void main_mem_map(address_map &map) ATTR_COLD; + void main_io_map(address_map &map) ATTR_COLD; + void sub_mem_map(address_map &map) ATTR_COLD; + void sub_io_map(address_map &map) ATTR_COLD; + + 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); + + SCC8530(config, m_scc[0], 3.6864_MHz_XTAL); + + SCC8530(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 ) |