diff options
Diffstat (limited to 'src/mame/bondwell/bw2.cpp')
-rw-r--r-- | src/mame/bondwell/bw2.cpp | 640 |
1 files changed, 640 insertions, 0 deletions
diff --git a/src/mame/bondwell/bw2.cpp b/src/mame/bondwell/bw2.cpp new file mode 100644 index 00000000000..fefc5deff83 --- /dev/null +++ b/src/mame/bondwell/bw2.cpp @@ -0,0 +1,640 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/*************************************************************************** + + drivers/bw2.c + + Bondwell BW 2 + + - Z80L CPU 4MHz + - 64KB RAM, expandable to 224KB RAM. + - 4KB System ROM + - MSM6255 LCD controller, 640x200 pixels + - 16KB Video RAM + - TMS2797 FDC controller + - 8251 USART serial interface + - 8253 PIT timer + - 8255 PPI + + http://www.thebattles.net/bondwell/ + + http://www.vintage-computer.com/bondwell2.shtml + + http://www2.okisemi.com/site/productscatalog/displaydrivers/availabledocuments/Intro-7090.html + +***************************************************************************/ + +#include "emu.h" +#include "bw2.h" +#include "bus/rs232/rs232.h" +#include "screen.h" +#include "softlist_dev.h" + + +//************************************************************************** +// MACROS / CONSTANTS +//************************************************************************** + +enum +{ + RAM1 = 0, + VRAM, + RAM2, + RAM3, + RAM4, + RAM5, + RAM6, + ROM +}; + +#define HAS_KB_OF_RAM(_kb) \ + (m_ram->size() >= (_kb * 1024)) + + +//************************************************************************** +// ADDRESS DECODING +//************************************************************************** + +//------------------------------------------------- +// read - +//------------------------------------------------- + +uint8_t bw2_state::read(offs_t offset) +{ + int rom = 1, vram = 1, ram1 = 1, ram2 = 1, ram3 = 1, ram4 = 1, ram5 = 1, ram6 = 1; + + uint8_t data = 0xff; + + switch (m_bank) + { + case RAM1: ram1 = 0; break; + case VRAM: vram = 0; break; + case RAM2: ram2 = 0; break; + case RAM3: ram3 = 0; break; + case RAM4: ram4 = 0; break; + case RAM5: ram5 = 0; break; + case RAM6: ram6 = 0; break; + case ROM: rom = 0; break; + } + + if (offset < 0x8000) + { + if (!rom) + data = m_rom->base()[offset & 0x3fff]; + + if (!vram) + data = m_video_ram[offset & 0x3fff]; + + if (!ram1) + data = m_ram->pointer()[offset]; + + if (!ram2 && HAS_KB_OF_RAM(96)) + data = m_ram->pointer()[0x10000 | offset]; + + if (!ram3 && HAS_KB_OF_RAM(128)) + data = m_ram->pointer()[0x18000 | offset]; + + if (!ram4 && HAS_KB_OF_RAM(160)) + data = m_ram->pointer()[0x20000 | offset]; + + if (!ram5 && HAS_KB_OF_RAM(192)) + data = m_ram->pointer()[0x28000 | offset]; + + if (!ram6 && HAS_KB_OF_RAM(224)) + data = m_ram->pointer()[0x30000 | offset]; + } + else + { + data = m_ram->pointer()[offset]; + } + + return m_exp->cd_r(offset, data, ram2, ram3, ram4, ram5, ram6); +} + + +//------------------------------------------------- +// write - +//------------------------------------------------- + +void bw2_state::write(offs_t offset, uint8_t data) +{ + int vram = 1, ram1 = 1, ram2 = 1, ram3 = 1, ram4 = 1, ram5 = 1, ram6 = 1; + + switch (m_bank) + { + case RAM1: ram1 = 0; break; + case VRAM: vram = 0; break; + case RAM2: ram2 = 0; break; + case RAM3: ram3 = 0; break; + case RAM4: ram4 = 0; break; + case RAM5: ram5 = 0; break; + case RAM6: ram6 = 0; break; + } + + if (offset < 0x8000) + { + if (!vram) + m_video_ram[offset & 0x3fff] = data; + + if (!ram1) + m_ram->pointer()[offset] = data; + + if (!ram2 && HAS_KB_OF_RAM(96)) + m_ram->pointer()[0x10000 | offset] = data; + + if (!ram3 && HAS_KB_OF_RAM(128)) + m_ram->pointer()[0x18000 | offset] = data; + + if (!ram4 && HAS_KB_OF_RAM(160)) + m_ram->pointer()[0x20000 | offset] = data; + + if (!ram5 && HAS_KB_OF_RAM(192)) + m_ram->pointer()[0x28000 | offset] = data; + + if (!ram6 && HAS_KB_OF_RAM(224)) + m_ram->pointer()[0x30000 | offset] = data; + } + else + { + m_ram->pointer()[offset] = data; + } + + m_exp->cd_w(offset, data, ram2, ram3, ram4, ram5, ram6); +} + + + +//************************************************************************** +// ADDRESS MAPS +//************************************************************************** + +//------------------------------------------------- +// ADDRESS_MAP( bw2_mem ) +//------------------------------------------------- + +void bw2_state::bw2_mem(address_map &map) +{ + map.unmap_value_high(); + map(0x0000, 0xffff).rw(FUNC(bw2_state::read), FUNC(bw2_state::write)); +} + + +//------------------------------------------------- +// ADDRESS_MAP( bw2_io ) +//------------------------------------------------- + +void bw2_state::bw2_io(address_map &map) +{ + map.unmap_value_high(); + map.global_mask(0xff); + map(0x00, 0x03).rw(I8255A_TAG, FUNC(i8255_device::read), FUNC(i8255_device::write)); + map(0x10, 0x13).rw(m_pit, FUNC(pit8253_device::read), FUNC(pit8253_device::write)); + map(0x20, 0x21).m(m_lcdc, FUNC(msm6255_device::map)); + map(0x30, 0x3f).rw(m_exp, FUNC(bw2_expansion_slot_device::slot_r), FUNC(bw2_expansion_slot_device::slot_w)); + map(0x40, 0x41).rw(m_uart, FUNC(i8251_device::read), FUNC(i8251_device::write)); + map(0x50, 0x50).w("cent_data_out", FUNC(output_latch_device::write)); + map(0x60, 0x63).rw(m_fdc, FUNC(wd2797_device::read), FUNC(wd2797_device::write)); + map(0x70, 0x7f).rw(m_exp, FUNC(bw2_expansion_slot_device::modsel_r), FUNC(bw2_expansion_slot_device::modsel_w)); +} + + +//------------------------------------------------- +// ADDRESS_MAP( lcdc_map ) +//------------------------------------------------- + +void bw2_state::lcdc_map(address_map &map) +{ + map.global_mask(0x3fff); + map(0x0000, 0x3fff).ram().share("videoram"); +} + + + +//************************************************************************** +// INPUT PORTS +//************************************************************************** + +//------------------------------------------------- +// INPUT_PORTS( bw2 ) +//------------------------------------------------- + +/* + Keyboard matrix + X0 X1 X2 X3 X4 X5 X6 X7 + +-----+-----+-----+-----+-----+-----+-----+-----+ + Y9 |CAPS | | | | | | | | + +-----+-----+-----+-----+-----+-----+-----+-----+ + Y8 |SHIFT| |SPACE| Z | A | Q | 2 " | F1 | + +-----+-----+-----+-----+-----+-----+-----+-----+ + Y7 |CTRL | - = | \ | | X | S | W | 3 # | F2 | + +-----+-----+-----+-----+-----+-----+-----+-----+ + Y6 | @ ` | P | UP | C | D | E | 4 $ | F3 | + +-----+-----+-----+-----+-----+-----+-----+-----+ + Y5 | 1 ! | | | V | F | R | 5 % | F4 | + +-----+-----+-----+-----+-----+-----+-----+-----+ + Y4 | ESC | | | B | G | T | 6 & | F5 | + +-----+-----+-----+-----+-----+-----+-----+-----+ + Y3 | TAB | : * |ENTER| N | H | Y | 7 ' | F6 | + +-----+-----+-----+-----+-----+-----+-----+-----+ + Y2 |DOWN | ^ ~ | [ { | M | J | U | 8 ( | F7 | + +-----+-----+-----+-----+-----+-----+-----+-----+ + Y1 |RIGHT| ; + | ] } | , < | K | I | 9 ) | F8 | + +-----+-----+-----+-----+-----+-----+-----+-----+ + Y0 |LEFT | BS | / ? | . > | L | O | 0 _ | DEL | + +-----+-----+-----+-----+-----+-----+-----+-----+ +*/ + +static INPUT_PORTS_START( bw2 ) + PORT_START("Y0") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_LEFT) PORT_CHAR(UCHAR_MAMEKEY(LEFT)) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?') + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>') + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L') + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O') + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR('_') + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_DEL) PORT_CHAR(UCHAR_MAMEKEY(DEL)) + + PORT_START("Y1") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT)) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR('+') + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(']') PORT_CHAR('}') + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<') + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K') + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I') + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')') + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F8) PORT_CHAR(UCHAR_MAMEKEY(F8)) + + PORT_START("Y2") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN)) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_TILDE) PORT_CHAR('^') PORT_CHAR('~') + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[') PORT_CHAR('{') + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M') + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J') + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U') + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(') + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F7) PORT_CHAR(UCHAR_MAMEKEY(F7)) + + PORT_START("Y3") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_TAB) PORT_CHAR(UCHAR_MAMEKEY(TAB)) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR(':') PORT_CHAR('*') + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N') + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H') + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y') + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'') + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F6) PORT_CHAR(UCHAR_MAMEKEY(F6)) + + PORT_START("Y4") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_ESC) PORT_CHAR(27) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNUSED) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B') + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G') + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T') + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&') + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F5) PORT_CHAR(UCHAR_MAMEKEY(F5)) + + PORT_START("Y5") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!') + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNUSED) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V') + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F') + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R') + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%') + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F4) PORT_CHAR(UCHAR_MAMEKEY(F4)) + + PORT_START("Y6") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR('@') PORT_CHAR('`') + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P') + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_UP) PORT_CHAR(UCHAR_MAMEKEY(UP)) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C') PORT_CHAR(3) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D') + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E') + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$') + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F3) PORT_CHAR(UCHAR_MAMEKEY(F3)) + + PORT_START("Y7") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_LCONTROL) PORT_CHAR(UCHAR_SHIFT_2) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('=') + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\\') PORT_CHAR('|') + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X') + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S') + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W') + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#') + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F2) PORT_CHAR(UCHAR_MAMEKEY(F2)) + + PORT_START("Y8") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ') + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z') + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A') + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q') + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('"') + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F1) PORT_CHAR(UCHAR_MAMEKEY(F1)) + + PORT_START("Y9") + PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_CAPSLOCK) PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK)) + PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED) + PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNUSED) + PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNUSED) + PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED) + PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED) + PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED) + PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED) + + PORT_START("BAUD") + PORT_CONFNAME( 0x05, 0x05, "Baud rate") + PORT_CONFSETTING( 0x00, "9600 baud" ) + PORT_CONFSETTING( 0x01, "4800 baud" ) + PORT_CONFSETTING( 0x02, "2400 baud" ) + PORT_CONFSETTING( 0x03, "1200 baud" ) + PORT_CONFSETTING( 0x04, "600 baud" ) + PORT_CONFSETTING( 0x05, "300 baud" ) +INPUT_PORTS_END + + + +//************************************************************************** +// DEVICE CONFIGURATION +//************************************************************************** + +void bw2_state::write_centronics_busy(int state) +{ + m_centronics_busy = state; +} + +//------------------------------------------------- +// I8255A interface +//------------------------------------------------- + +void bw2_state::ppi_pa_w(uint8_t data) +{ + /* + + PA0 KB0 Keyboard line select 0 + PA1 KB1 Keyboard line select 1 + PA2 KB2 Keyboard line select 2 + PA3 KB3 Keyboard line select 3 + PA4 /DS0 Drive select 0 + PA5 /DS1 Drive select 1 + PA6 Select RS232 connector + PA7 /STROBE to centronics printer + + */ + + // keyboard + m_kb = data & 0x0f; + + // drive select + m_floppy = nullptr; + if (BIT(data, 4)) m_floppy = m_floppy0->get_device(); + if (BIT(data, 5)) m_floppy = m_floppy1->get_device(); + + m_fdc->set_floppy(m_floppy); + if (m_floppy) m_floppy->mon_w(m_mtron); + + // centronics strobe + m_centronics->write_strobe(BIT(data, 7)); +} + +uint8_t bw2_state::ppi_pb_r() +{ + /* + + PB0 Keyboard column status of selected line + PB1 Keyboard column status of selected line + PB2 Keyboard column status of selected line + PB3 Keyboard column status of selected line + PB4 Keyboard column status of selected line + PB5 Keyboard column status of selected line + PB6 Keyboard column status of selected line + PB7 Keyboard column status of selected line + + */ + + uint8_t data = 0xff; + + if (m_kb < 10) + { + data = m_y[m_kb]->read(); + } + + return data; +} + +void bw2_state::ppi_pc_w(uint8_t data) +{ + /* + + PC0 Memory bank select + PC1 Memory bank select + PC2 Memory bank select + PC3 Not connected + + */ + + m_bank = data & 0x07; +} + +uint8_t bw2_state::ppi_pc_r() +{ + /* + + PC4 BUSY from centronics printer + PC5 M/FDBK motor feedback + PC6 RLSD Carrier detect from RS232 + PC7 /PROT Write protected disk + + */ + + uint8_t data = m_bank; + + // centronics busy + data |= m_centronics_busy << 4; + + // floppy motor + data |= m_mfdbk << 5; + + // write protect + if (m_floppy) data |= !m_floppy->wpt_r() << 7; + + return data; +} + +//------------------------------------------------- +// pit8253_config pit_intf +//------------------------------------------------- + +void bw2_state::mtron_w(int state) +{ + m_mtron = state; + m_mfdbk = !state; + + if (m_floppy) m_floppy->mon_w(m_mtron); +} + +//------------------------------------------------- +// floppy_formats +//------------------------------------------------- + +void bw2_state::fdc_drq_w(int state) +{ + if (state) + { + if (m_maincpu->state_int(Z80_HALT)) + { + m_maincpu->set_input_line(INPUT_LINE_NMI, HOLD_LINE); + } + } + else + { + m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE); + } +} + +void bw2_state::floppy_formats(format_registration &fr) +{ + fr.add_mfm_containers(); + fr.add(FLOPPY_BW2_FORMAT); +} + +static void bw2_floppies(device_slot_interface &device) +{ + device.option_add("35dd", FLOPPY_35_DD); // Teac FD-35 +} + + + +//************************************************************************** +// MACHINE INITIALIZATION +//************************************************************************** + + +void bw2_state::bw2_palette(palette_device &palette) const +{ + palette.set_pen_color(0, 0xa5, 0xad, 0xa5); + palette.set_pen_color(1, 0x31, 0x39, 0x10); +} + + +//------------------------------------------------- +// MACHINE_START( bw2 ) +//------------------------------------------------- + +void bw2_state::machine_start() +{ + // register for state saving + save_item(NAME(m_kb)); + save_item(NAME(m_bank)); + save_item(NAME(m_mtron)); + save_item(NAME(m_mfdbk)); + save_item(NAME(m_centronics_busy)); +} + + + +//************************************************************************** +// MACHINE DRIVERS +//************************************************************************** + +//------------------------------------------------- +// machine_config( bw2 ) +//------------------------------------------------- + +void bw2_state::bw2(machine_config &config) +{ + // basic machine hardware + Z80(config, m_maincpu, 16_MHz_XTAL / 4); + m_maincpu->set_addrmap(AS_PROGRAM, &bw2_state::bw2_mem); + m_maincpu->set_addrmap(AS_IO, &bw2_state::bw2_io); + + // video hardware + screen_device &screen(SCREEN(config, SCREEN_TAG, SCREEN_TYPE_LCD)); + screen.set_refresh_hz(60); + screen.set_screen_update(MSM6255_TAG, FUNC(msm6255_device::screen_update)); + screen.set_size(640, 200); + screen.set_visarea(0, 640-1, 0, 200-1); + screen.set_palette("palette"); + + PALETTE(config, "palette", FUNC(bw2_state::bw2_palette), 2); + + // devices + PIT8253(config, m_pit, 0); + m_pit->set_clk<0>(16_MHz_XTAL / 4); // 8251 USART TXC, RXC + m_pit->out_handler<0>().set(m_uart, FUNC(i8251_device::write_txc)); + m_pit->out_handler<0>().append(m_uart, FUNC(i8251_device::write_rxc)); + m_pit->set_clk<1>(11000); // LCD controller + m_pit->out_handler<1>().set(m_pit, FUNC(pit8253_device::write_clk2)); + m_pit->set_clk<2>(0); // Floppy /MTRON + m_pit->out_handler<2>().set(FUNC(bw2_state::mtron_w)); + + i8255_device &ppi(I8255A(config, I8255A_TAG)); + ppi.out_pa_callback().set(FUNC(bw2_state::ppi_pa_w)); + ppi.in_pb_callback().set(FUNC(bw2_state::ppi_pb_r)); + ppi.in_pc_callback().set(FUNC(bw2_state::ppi_pc_r)); + ppi.out_pc_callback().set(FUNC(bw2_state::ppi_pc_w)); + + MSM6255(config, m_lcdc, 16_MHz_XTAL); + m_lcdc->set_addrmap(0, &bw2_state::lcdc_map); + m_lcdc->set_screen(SCREEN_TAG); + + CENTRONICS(config, m_centronics, centronics_devices, "printer"); + m_centronics->busy_handler().set(FUNC(bw2_state::write_centronics_busy)); + + output_latch_device &latch(OUTPUT_LATCH(config, "cent_data_out")); + m_centronics->set_output_latch(latch); + + I8251(config, m_uart, 0); + m_uart->txd_handler().set(RS232_TAG, FUNC(rs232_port_device::write_txd)); + m_uart->dtr_handler().set(RS232_TAG, FUNC(rs232_port_device::write_dtr)); + m_uart->rts_handler().set(RS232_TAG, FUNC(rs232_port_device::write_rts)); + + rs232_port_device &rs232(RS232_PORT(config, RS232_TAG, default_rs232_devices, nullptr)); + rs232.rxd_handler().set(m_uart, FUNC(i8251_device::write_rxd)); + rs232.dsr_handler().set(m_uart, FUNC(i8251_device::write_dsr)); + + WD2797(config, m_fdc, 16_MHz_XTAL / 16); + m_fdc->intrq_wr_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0); + m_fdc->drq_wr_callback().set(FUNC(bw2_state::fdc_drq_w)); + + FLOPPY_CONNECTOR(config, WD2797_TAG":0", bw2_floppies, "35dd", bw2_state::floppy_formats); + FLOPPY_CONNECTOR(config, WD2797_TAG":1", bw2_floppies, nullptr, bw2_state::floppy_formats); + BW2_EXPANSION_SLOT(config, m_exp, 16_MHz_XTAL, bw2_expansion_cards, nullptr); + + // software list + SOFTWARE_LIST(config, "flop_list").set_original("bw2"); + + // internal ram + RAM(config, RAM_TAG).set_default_size("64K").set_extra_options("96K,128K,160K,192K,224K"); +} + + + +//************************************************************************** +// ROMS +//************************************************************************** + +//------------------------------------------------- +// ROM( bw2 ) +//------------------------------------------------- + +ROM_START( bw2 ) + ROM_REGION( 0x1000, Z80_TAG, 0 ) + ROM_DEFAULT_BIOS( "v20" ) + ROM_SYSTEM_BIOS( 0, "v12", "BW 2 v1.2" ) + ROMX_LOAD( "bw2-12.ic8", 0x0000, 0x1000, CRC(0ab42d10) SHA1(430b232631eee9b715151b8d191b7eb9449ac513), ROM_BIOS(0) ) + ROM_SYSTEM_BIOS( 1, "v20", "BW 2 v2.0" ) + ROMX_LOAD( "bw2-20.ic8", 0x0000, 0x1000, CRC(86f36471) SHA1(a3e2ba4edd50ff8424bb0675bdbb3b9f13c04c9d), ROM_BIOS(1) ) +ROM_END + + + +//************************************************************************** +// SYSTEM DRIVERS +//************************************************************************** + +// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS +COMP( 1985, bw2, 0, 0, bw2, bw2, bw2_state, empty_init, "Bondwell Holding", "Bondwell Model 2", MACHINE_NO_SOUND_HW ) |