// license:BSD-3-Clause // copyright-holders:Patrick Mackinlay /* * Labtam 3000 8086 VDU COMM card. * * Sources: * - https://arvutimuuseum.ut.ee/index.php?m=eksponaadid&id=223 * * TODO: * - keyboard click/bell * - light pen * - parallel ports */ #include "emu.h" #include "labtam_vducom.h" #include "machine/input_merger.h" #define VERBOSE 0 #include "logmacro.h" enum u7_mask : u8 { U7_PWRFAIL = 0x01, // enable multibus access U7_WINDOW = 0x02, // 0=lower 512k, 1=upper 512k U7_SWAP = 0x04, // swap data & display segments U7_VDOUBLE = 0x08, // enable double vertical resolution U7_HALF = 0x10, // enable half intensity U7_CLICK = 0x20, // disable key click U7_BLANK = 0x80, // disable blanked screen }; DEFINE_DEVICE_TYPE(LABTAM_8086CPU, labtam_8086cpu_device, "labtam_8086cpu", "Labtam 8086 CPU") DEFINE_DEVICE_TYPE(LABTAM_VDUCOM, labtam_vducom_device, "labtam_vducom", "Labtam 8086 VDU COMM") labtam_vducom_device_base::labtam_vducom_device_base(machine_config const &mconfig, device_type type, char const *tag, device_t *owner, u32 clock) : device_t(mconfig, type, tag, owner, clock) , device_multibus_interface(mconfig, *this) , m_cpu(*this, "cpu") , m_pic(*this, "pic") , m_ctc(*this, "ctc%u", 0U) , m_com(*this, "com%u", 0U) , m_nvram(*this, "nvram%u", 0U) , m_serial(*this, "serial%u", 0U) , m_e4(*this, "E4") , m_mbus(*this, "mbus") , m_installed(false) { } labtam_8086cpu_device::labtam_8086cpu_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock) : labtam_vducom_device_base(mconfig, LABTAM_8086CPU, tag, owner, clock) { } labtam_vducom_device::labtam_vducom_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock) : labtam_vducom_device_base(mconfig, LABTAM_VDUCOM, tag, owner, clock) , m_crtc(*this, "crtc") , m_palette(*this, "palette") , m_screen(*this, "screen") , m_ram(*this, "ram%u", 0U) { } ROM_START(labtam_8086cpu) ROM_REGION16_LE(0x10000, "eprom", 0) ROM_SYSTEM_BIOS(0, "v0", "v0") ROMX_LOAD("slave_1__0.u34", 0xc000, 0x2000, CRC(f5007dd0) SHA1(2362852d88bf32ce605ad394244dc6e21a6df5c6), ROM_SKIP(1) | ROM_BIOS(0)) ROMX_LOAD("slave_1__1.u44", 0xc001, 0x2000, CRC(2de2e667) SHA1(c575d5d53f2fe99569af002c636754dedca09e3b), ROM_SKIP(1) | ROM_BIOS(0)) ROM_END ROM_START(labtam_vducom) ROM_REGION16_LE(0x10000, "eprom", 0) ROM_SYSTEM_BIOS(0, "k84", "Version K84 23/11/84") // date not certain ROMX_LOAD("vdu_com__k84.1_0.u26", 0x0000, 0x4000, CRC(ac27697e) SHA1(eeec9cff06181dffe95a37aefb2b3789a0959b4f), ROM_SKIP(1) | ROM_BIOS(0)) ROMX_LOAD("vdu_com__k84.1_1.u39", 0x0001, 0x4000, CRC(8b3e567d) SHA1(5ce821004155d02b87ed7b6d14989a9fffc38c6a), ROM_SKIP(1) | ROM_BIOS(0)) ROMX_LOAD("vdu_com__k84.1_2.u34", 0x8000, 0x4000, CRC(70a2c615) SHA1(67d265be3101dfe33fa705447e1394410e55f518), ROM_SKIP(1) | ROM_BIOS(0)) ROMX_LOAD("vdu_com__k84.1_3.u44", 0x8001, 0x4000, CRC(dcd7ce03) SHA1(727e5fa72d6088ddf9e8613656d713754d628538), ROM_SKIP(1) | ROM_BIOS(0)) ROM_SYSTEM_BIOS(1, "l83", "Version L83 15/12/83") // date not certain ROMX_LOAD("vdu_com__l83.3_0.u26", 0x0000, 0x4000, CRC(2ff53d1d) SHA1(034a89f25dd03e43bdeae710f55d948483624dbe), ROM_SKIP(1) | ROM_BIOS(1)) ROMX_LOAD("vdu_com__l83.3_1.u39", 0x0001, 0x4000, CRC(5c425046) SHA1(baad928d3189ed6112ed1849511ce230ddb66166), ROM_SKIP(1) | ROM_BIOS(1)) ROMX_LOAD("vdu_com__l83.3_2.u34", 0x8000, 0x4000, CRC(2ed84e20) SHA1(36fdf5e83b1e8f9b706a221930cec1aa2c587a96), ROM_SKIP(1) | ROM_BIOS(1)) ROMX_LOAD("vdu_com__l83.3_3.u44", 0x8001, 0x4000, CRC(c601c308) SHA1(61503b5109183a5814be3fcaa393fde8f5bd5359), ROM_SKIP(1) | ROM_BIOS(1)) ROM_END static INPUT_PORTS_START(labtam_vducom) PORT_START("E4") PORT_DIPNAME(0x08, 0x08, "Keyboard Select 1") PORT_DIPLOCATION("E4:1") PORT_DIPSETTING(0x00, DEF_STR(Yes)) PORT_DIPSETTING(0x08, DEF_STR(No)) PORT_DIPNAME(0x10, 0x10, "Disable Graphics") PORT_DIPLOCATION("E4:2") PORT_DIPSETTING(0x00, DEF_STR(Yes)) PORT_DIPSETTING(0x10, DEF_STR(No)) PORT_DIPNAME(0x04, 0x04, "Keyboard Select 0") PORT_DIPLOCATION("E4:3") PORT_DIPSETTING(0x00, DEF_STR(Yes)) PORT_DIPSETTING(0x04, DEF_STR(No)) PORT_DIPNAME(0x20, 0x20, "Killer Enable") PORT_DIPLOCATION("E4:4") PORT_DIPSETTING(0x00, DEF_STR(Yes)) PORT_DIPSETTING(0x20, DEF_STR(No)) PORT_DIPNAME(0x02, 0x02, "Init NVRAM") PORT_DIPLOCATION("E4:5") PORT_DIPSETTING(0x00, DEF_STR(Yes)) PORT_DIPSETTING(0x02, DEF_STR(No)) PORT_DIPNAME(0x01, 0x01, "Terminal Mode") PORT_DIPLOCATION("E4:7") PORT_DIPSETTING(0x00, DEF_STR(Yes)) PORT_DIPSETTING(0x01, DEF_STR(No)) PORT_DIPUNUSED_DIPLOC(0xc0, 0xc0, "E4:6,8") INPUT_PORTS_END static INPUT_PORTS_START(labtam_8086cpu) PORT_START("E4") PORT_DIPNAME(0x08, 0x08, "Keyboard Select 1") PORT_DIPLOCATION("E4:1") PORT_DIPSETTING(0x00, DEF_STR(Yes)) PORT_DIPSETTING(0x08, DEF_STR(No)) PORT_DIPNAME(0x10, 0x00, "Disable Graphics") PORT_DIPLOCATION("E4:2") PORT_DIPSETTING(0x00, DEF_STR(Yes)) PORT_DIPSETTING(0x10, DEF_STR(No)) PORT_DIPNAME(0x04, 0x04, "Keyboard Select 0") PORT_DIPLOCATION("E4:3") PORT_DIPSETTING(0x00, DEF_STR(Yes)) PORT_DIPSETTING(0x04, DEF_STR(No)) PORT_DIPNAME(0x20, 0x20, "Killer Enable") PORT_DIPLOCATION("E4:4") PORT_DIPSETTING(0x00, DEF_STR(Yes)) PORT_DIPSETTING(0x20, DEF_STR(No)) PORT_DIPNAME(0x02, 0x02, "Init NVRAM") PORT_DIPLOCATION("E4:5") PORT_DIPSETTING(0x00, DEF_STR(Yes)) PORT_DIPSETTING(0x02, DEF_STR(No)) PORT_DIPNAME(0x01, 0x01, "Terminal Mode") PORT_DIPLOCATION("E4:7") PORT_DIPSETTING(0x00, DEF_STR(Yes)) PORT_DIPSETTING(0x01, DEF_STR(No)) PORT_DIPUNUSED_DIPLOC(0xc0, 0xc0, "E4:6,8") INPUT_PORTS_END static const gfx_layout vducom_char_set_1 = { 8, 12, 64, 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 * 12 }; static const gfx_layout vducom_char_set_2 = { 8, 12, 96, 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 * 12 }; static GFXDECODE_START(labtam_vducom) GFXDECODE_ENTRY("eprom", 0xbc80, vducom_char_set_1, 0, 1) GFXDECODE_ENTRY("eprom", 0xc100, vducom_char_set_2, 0, 1) GFXDECODE_END const tiny_rom_entry *labtam_vducom_device::device_rom_region() const { return ROM_NAME(labtam_vducom); } const tiny_rom_entry *labtam_8086cpu_device::device_rom_region() const { return ROM_NAME(labtam_8086cpu); } ioport_constructor labtam_vducom_device::device_input_ports() const { return INPUT_PORTS_NAME(labtam_vducom); } ioport_constructor labtam_8086cpu_device::device_input_ports() const { return INPUT_PORTS_NAME(labtam_8086cpu); } void labtam_vducom_device_base::device_start() { save_item(NAME(m_start)); save_item(NAME(m_u7)); } void labtam_vducom_device_base::device_reset() { if (!m_installed) m_installed = true; m_u7 = 0; m_start = 0; m_nvram[0]->recall(1); m_nvram[1]->recall(1); m_mbus.select(0); m_ctc[0]->gate1_w(1); m_ctc[0]->gate2_w(1); m_ctc[0]->gate3_w(1); m_ctc[0]->gate4_w(1); m_ctc[0]->gate5_w(1); m_ctc[0]->source1_w(1); m_ctc[0]->source2_w(1); m_ctc[0]->source3_w(1); m_ctc[0]->source4_w(1); m_ctc[0]->source5_w(1); m_ctc[1]->gate4_w(1); m_ctc[1]->source5_w(1); } void labtam_vducom_device_base::device_add_mconfig(machine_config &config) { I8086(config, m_cpu, 16_MHz_XTAL / 2); m_cpu->set_addrmap(AS_PROGRAM, &labtam_vducom_device_base::cpu_mem); m_cpu->set_addrmap(AS_IO, &labtam_vducom_device_base::cpu_pio); m_cpu->set_irq_acknowledge_callback(m_pic, FUNC(pic8259_device::inta_cb)); AM9513(config, m_ctc[1], 16_MHz_XTAL / 4); m_ctc[1]->out4_cb().set(m_ctc[1], FUNC(am9513_device::gate5_w)); m_ctc[1]->out5_cb().set(m_ctc[1], FUNC(am9513_device::source4_w)); // TODO: also keyboard bell AM9513(config, m_ctc[0], 16_MHz_XTAL / 4); m_ctc[0]->out1_cb().set(m_com[1], FUNC(upd7201_device::txcb_w)); m_ctc[0]->out2_cb().set(m_com[1], FUNC(upd7201_device::rxcb_w)); m_ctc[0]->out3_cb().set(m_com[1], FUNC(upd7201_device::rxca_w)); m_ctc[0]->out3_cb().append(m_com[1], FUNC(upd7201_device::txca_w)); m_ctc[0]->out4_cb().set(m_com[0], FUNC(upd7201_device::rxcb_w)); m_ctc[0]->out4_cb().append(m_com[0], FUNC(upd7201_device::txcb_w)); m_ctc[0]->out5_cb().set(m_com[0], FUNC(upd7201_device::rxca_w)); m_ctc[0]->out5_cb().append(m_com[0], FUNC(upd7201_device::txca_w)); PIC8259(config, m_pic); /* * irq source * 0 crtc vsync * 1 light pen strobe * 2 com1 * 3 com0 * 4 parallel input strobe * 5 parallel printer acknowledge * 6 parallel printer busy * 7 not connected */ m_pic->out_int_callback().set_inputline(m_cpu, INPUT_LINE_INT0); int_callback<3>().set(m_pic, FUNC(pic8259_device::ir6_w)); UPD7201(config, m_com[0], 16_MHz_XTAL / 4); m_com[0]->out_int_callback().set(m_pic, FUNC(pic8259_device::ir3_w)); RS232_PORT(config, m_serial[0], default_rs232_devices, nullptr); input_merger_any_high_device &com0dcda(INPUT_MERGER_ANY_HIGH(config, "com0dcda")); input_merger_any_high_device &com0ctsa(INPUT_MERGER_ANY_HIGH(config, "com0ctsa")); m_serial[0]->cts_handler().set(com0ctsa, FUNC(input_merger_any_high_device::in_w<0>)); m_serial[0]->dsr_handler().set(com0ctsa, FUNC(input_merger_any_high_device::in_w<1>)); com0ctsa.output_handler().set(m_com[0], FUNC(upd7201_device::ctsa_w)); m_serial[0]->dcd_handler().set(com0dcda, FUNC(input_merger_any_high_device::in_w<0>)); m_serial[0]->dsr_handler().append(com0dcda, FUNC(input_merger_any_high_device::in_w<1>)); com0dcda.output_handler().set(m_com[0], FUNC(upd7201_device::dcda_w)); m_serial[0]->rxd_handler().set(m_com[0], FUNC(upd7201_device::rxa_w)); m_com[0]->out_dtra_callback().set(m_serial[0], FUNC(rs232_port_device::write_dtr)); m_com[0]->out_rtsa_callback().set(m_serial[0], FUNC(rs232_port_device::write_rts)); m_com[0]->out_txda_callback().set(m_serial[0], FUNC(rs232_port_device::write_txd)); RS232_PORT(config, m_serial[1], default_rs232_devices, nullptr); input_merger_any_high_device &com0dcdb(INPUT_MERGER_ANY_HIGH(config, "com0dcdb")); input_merger_any_high_device &com0ctsb(INPUT_MERGER_ANY_HIGH(config, "com0ctsb")); m_serial[1]->cts_handler().set(com0ctsb, FUNC(input_merger_any_high_device::in_w<0>)); m_serial[1]->dsr_handler().set(com0ctsb, FUNC(input_merger_any_high_device::in_w<1>)); com0ctsb.output_handler().set(m_com[0], FUNC(upd7201_device::ctsb_w)); m_serial[1]->dcd_handler().set(com0dcdb, FUNC(input_merger_any_high_device::in_w<0>)); m_serial[1]->dsr_handler().append(com0dcdb, FUNC(input_merger_any_high_device::in_w<1>)); com0dcdb.output_handler().set(m_com[0], FUNC(upd7201_device::dcdb_w)); m_serial[1]->rxd_handler().set(m_com[0], FUNC(upd7201_device::rxb_w)); m_com[0]->out_txdb_callback().set(m_serial[1], FUNC(rs232_port_device::write_txd)); m_com[0]->out_rtsb_callback().set(m_serial[1], FUNC(rs232_port_device::write_rts)); m_com[0]->out_dtrb_callback().set(m_serial[1], FUNC(rs232_port_device::write_dtr)); UPD7201(config, m_com[1], 16_MHz_XTAL / 4); m_com[1]->out_int_callback().set(m_pic, FUNC(pic8259_device::ir2_w)); RS232_PORT(config, m_serial[2], default_rs232_devices, nullptr); input_merger_any_high_device &com1dcda(INPUT_MERGER_ANY_HIGH(config, "com1dcda")); input_merger_any_high_device &com1ctsa(INPUT_MERGER_ANY_HIGH(config, "com1ctsa")); m_serial[2]->cts_handler().set(com1ctsa, FUNC(input_merger_any_high_device::in_w<0>)); m_serial[2]->dsr_handler().set(com1ctsa, FUNC(input_merger_any_high_device::in_w<1>)); com1ctsa.output_handler().set(m_com[1], FUNC(upd7201_device::ctsa_w)); m_serial[2]->dcd_handler().set(com1dcda, FUNC(input_merger_any_high_device::in_w<0>)); m_serial[2]->dsr_handler().append(com1dcda, FUNC(input_merger_any_high_device::in_w<1>)); com1dcda.output_handler().set(m_com[1], FUNC(upd7201_device::dcda_w)); m_serial[2]->rxd_handler().set(m_com[1], FUNC(upd7201_device::rxa_w)); m_com[1]->out_dtra_callback().set(m_serial[2], FUNC(rs232_port_device::write_dtr)); m_com[1]->out_rtsa_callback().set(m_serial[2], FUNC(rs232_port_device::write_rts)); m_com[1]->out_txda_callback().set(m_serial[2], FUNC(rs232_port_device::write_txd)); RS232_PORT(config, m_serial[3], default_rs232_devices, nullptr); m_serial[3]->dcd_handler().set(m_com[1], FUNC(upd7201_device::dcdb_w)); m_serial[3]->cts_handler().set(m_com[1], FUNC(upd7201_device::ctsb_w)); m_serial[3]->rxd_handler().set(m_com[1], FUNC(upd7201_device::rxb_w)); m_com[1]->out_dtrb_callback().set(m_serial[3], FUNC(rs232_port_device::write_dtr)); m_com[1]->out_rtsb_callback().set(m_serial[3], FUNC(rs232_port_device::write_rts)); m_com[1]->out_txdb_callback().set(m_serial[3], FUNC(rs232_port_device::write_txd)); X2212(config, m_nvram[0]); X2212(config, m_nvram[1]); } static DEVICE_INPUT_DEFAULTS_START(keyboard_defaults) DEVICE_INPUT_DEFAULTS("RS232_TXBAUD", 0xff, RS232_BAUD_110) DEVICE_INPUT_DEFAULTS_END void labtam_vducom_device::device_add_mconfig(machine_config &config) { labtam_vducom_device_base::device_add_mconfig(config); m_serial[3]->set_default_option("keyboard"); m_serial[3]->set_option_device_input_defaults("keyboard", DEVICE_INPUT_DEFAULTS_NAME(keyboard_defaults)); MC6845(config, m_crtc, 16_MHz_XTAL / 16); m_crtc->set_show_border_area(false); m_crtc->set_hpixels_per_column(16); m_crtc->out_vsync_callback().set("pic", FUNC(pic8259_device::ir0_w)); m_crtc->set_update_row_callback(FUNC(labtam_vducom_device::update_row)); m_crtc->set_screen(m_screen); PALETTE(config, m_palette, FUNC(labtam_vducom_device::palette_init), 4); SCREEN(config, m_screen, SCREEN_TYPE_RASTER); m_screen->set_raw(16_MHz_XTAL / 16, 62 * 16, 2 * 16, 52 * 16, 78 * 4, 3 * 4, 75 * 4); m_screen->set_screen_update(m_crtc, FUNC(mc6845_device::screen_update)); // gfxdecode is only to show the font data in the tile viewer GFXDECODE(config, "gfx", m_palette, labtam_vducom); } void labtam_vducom_device_base::cpu_mem(address_map &map) { map(0x00000, 0x0ffff).ram().share("ram1"); map(0x10000, 0x1ffff).ram().share("ram0"); map(0x20000, 0x2ffff).rom().region("eprom", 0).mirror(0x50000); map(0x80000, 0xfffff).view(m_mbus); m_mbus[0](0x80000, 0x8ffff).rom().region("eprom", 0).mirror(0x70000); m_mbus[1](0x80000, 0xfffff).rw(FUNC(labtam_vducom_device_base::bus_mem_r), FUNC(labtam_vducom_device_base::bus_mem_w)); } void labtam_vducom_device_base::cpu_pio(address_map &map) { map(0x0000, 0x7fff).rw(FUNC(labtam_vducom_device_base::bus_pio_r), FUNC(labtam_vducom_device_base::bus_pio_w)); map(0xe400, 0xe403).rw(m_pic, FUNC(pic8259_device::read), FUNC(pic8259_device::write)).umask16(0x00ff); map(0xe600, 0xe607).rw(m_com[0], FUNC(upd7201_device::ba_cd_r), FUNC(upd7201_device::ba_cd_w)).umask16(0x00ff); map(0xe800, 0xe807).rw(m_com[1], FUNC(upd7201_device::ba_cd_r), FUNC(upd7201_device::ba_cd_w)).umask16(0x00ff); map(0xea00, 0xea03).rw(m_ctc[0], FUNC(am9513_device::read8), FUNC(am9513_device::write8)).umask16(0x00ff); map(0xec00, 0xec03).rw(m_ctc[1], FUNC(am9513_device::read8), FUNC(am9513_device::write8)).umask16(0x00ff); map(0xee00, 0xefff).rw(FUNC(labtam_vducom_device_base::nvram_r), FUNC(labtam_vducom_device_base::nvram_w)).umask16(0x00ff); map(0xf000, 0xf00f).rw(FUNC(labtam_vducom_device_base::u15_r), FUNC(labtam_vducom_device_base::u7_w)).umask16(0x00ff); map(0xf200, 0xf200).lw8([this](u8 data) { m_start = (m_start & 0xff00) | u16(data) << 0; }, "start_lo"); map(0xf400, 0xf400).lw8([this](u8 data) { m_start = (m_start & 0x00ff) | u16(data) << 8; }, "start_hi"); //map(0xf600, 0xf600); // r:parallel data input, w:joystick start pulse //map(0xf800, 0xf800); // r:parallel data acknowledge, w:parallel printer output //map(0xfa00, 0xfa00); // w:parallel printer strobe map(0xfe00, 0xfe00).rw(FUNC(labtam_vducom_device_base::nvram_recall), FUNC(labtam_vducom_device_base::nvram_store)); } void labtam_vducom_device::cpu_pio(address_map &map) { labtam_vducom_device_base::cpu_pio(map); map(0xe000, 0xe000).rw(m_crtc, FUNC(mc6845_device::status_r), FUNC(mc6845_device::address_w)); map(0xe002, 0xe002).rw(m_crtc, FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w)); } void labtam_vducom_device::palette_init(palette_device &palette) { // 0=black, 1=dim, 2=normal, 3=bold palette.set_pen_color(0, rgb_t::black()); palette.set_pen_color(1, rgb_t(0x80, 0x80, 0x80)); palette.set_pen_color(2, rgb_t(0xc0, 0xc0, 0xc0)); palette.set_pen_color(3, rgb_t::white()); } // non-interlace: two planes 800x300, each 32k, 2bpp -> 4 levels (black, dim, normal, bold) // interlace: one plane 800x600, 64k, (black, normal) MC6845_UPDATE_ROW(labtam_vducom_device::update_row) { required_shared_ptr const ram = m_ram[BIT(u7(), 2)]; offs_t const offset = (start() >> 1) + ma * 4 + ra * 50; for (unsigned x = 0; x < x_count; x++) { u16 const data0 = ram[(offset + x)]; u16 const data1 = ram[(offset + x) ^ 0x4000]; for (unsigned b = 0; b < 16; b++) { unsigned c = BIT(data0, b) << 1; if (u7() & U7_HALF) c |= BIT(data1, b); bitmap.pix(y, x * 16 + b) = m_palette->pen_color(c); } } } void labtam_vducom_device_base::u7_w(offs_t offset, u8 data) { LOG("u7_w offset %d data %d (%s)\n", offset, data, machine().describe_context()); if (BIT(data, 0)) m_u7 |= 1U << offset; else m_u7 &= ~(1U << offset); m_mbus.select(BIT(m_u7, 0)); } void labtam_vducom_device_base::bus_mem_w(offs_t offset, u16 data, u16 mem_mask) { offs_t const address = (BIT(m_u7, 1) ? 0x80000 : 0) | (offset << 1); m_bus->space(AS_PROGRAM).write_word(address, data, mem_mask); } u16 labtam_vducom_device_base::bus_mem_r(offs_t offset, u16 mem_mask) { offs_t const address = (BIT(m_u7, 1) ? 0x80000 : 0) | (offset << 1); return m_bus->space(AS_PROGRAM).read_word(address, mem_mask); } u8 labtam_vducom_device_base::nvram_recall() { m_nvram[0]->recall(1); m_nvram[1]->recall(1); m_nvram[0]->recall(0); m_nvram[1]->recall(0); return 0; } void labtam_vducom_device_base::nvram_store(u8 data) { m_nvram[0]->store(1); m_nvram[1]->store(1); m_nvram[0]->store(0); m_nvram[1]->store(0); }