// license:BSD-3-Clause // copyright-holders:Robbbert /*************************************************************************** Excalibur 64 kit computer, designed and sold in Australia by BGR Computers. The official schematics have a LOT of errors and omissions. Skeleton driver created on 2014-12-09. Chips: Z80A, 8251, 8253, 8255, 6845 We have Basic 1.1. Other known versions are 1.01, 2.1 There are 2 versions of the colour prom, which have different palettes. We have the later version. Notes: - Control W then Enter will switch between 40 and 80 characters per line. - Control V turns cursor on - Graphics commands such as LINE, CIRCLE, HGRCLS, HGRSET etc only work with disk basic ToDo: - Colours are approximate. - Hardware supports 20cm and 13cm floppies, but we only support 13cm as this is the only software that exists. - The schematic shows the audio counter connected to 2MHz, but this produces sounds that are too high. Connected to 1MHz for now. - Serial - Pasting can sometimes drop a character. ****************************************************************************/ #include "emu.h" #include "bus/centronics/ctronics.h" #include "bus/rs232/rs232.h" #include "cpu/z80/z80.h" #include "imagedev/cassette.h" #include "imagedev/floppy.h" #include "machine/74123.h" #include "machine/i8251.h" #include "machine/i8255.h" #include "machine/pit8253.h" #include "machine/rescap.h" #include "machine/wd_fdc.h" #include "machine/z80dma.h" #include "sound/spkrdev.h" #include "video/mc6845.h" #include "emupal.h" #include "screen.h" #include "speaker.h" #include "formats/excali64_dsk.h" class excali64_state : public driver_device { public: excali64_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_palette(*this, "palette") , m_maincpu(*this, "maincpu") , m_p_chargen(*this, "chargen") , m_cass(*this, "cassette") , m_crtc(*this, "crtc") , m_io_keyboard(*this, "KEY.%u", 0) , m_dma(*this, "dma") , m_u12(*this, "u12") , m_centronics(*this, "centronics") , m_fdc(*this, "fdc") , m_floppy0(*this, "fdc:0") , m_floppy1(*this, "fdc:1") { } void excali64(machine_config &config); protected: virtual void machine_reset() override; private: void excali64_palette(palette_device &palette); DECLARE_WRITE8_MEMBER(ppib_w); DECLARE_READ8_MEMBER(ppic_r); DECLARE_WRITE8_MEMBER(ppic_w); DECLARE_READ8_MEMBER(port00_r); DECLARE_READ8_MEMBER(port50_r); DECLARE_WRITE8_MEMBER(port70_w); DECLARE_WRITE8_MEMBER(porte4_w); DECLARE_READ8_MEMBER(porte8_r); DECLARE_WRITE8_MEMBER(portec_w); DECLARE_FLOPPY_FORMATS(floppy_formats); DECLARE_WRITE_LINE_MEMBER(cent_busy_w); DECLARE_WRITE_LINE_MEMBER(busreq_w); DECLARE_READ8_MEMBER(memory_read_byte); DECLARE_WRITE8_MEMBER(memory_write_byte); DECLARE_READ8_MEMBER(io_read_byte); DECLARE_WRITE8_MEMBER(io_write_byte); MC6845_UPDATE_ROW(update_row); DECLARE_WRITE_LINE_MEMBER(crtc_hs); DECLARE_WRITE_LINE_MEMBER(crtc_vs); DECLARE_WRITE_LINE_MEMBER(motor_w); void io_map(address_map &map); void mem_map(address_map &map); uint8_t *m_p_videoram; uint8_t *m_p_hiresram; uint8_t m_sys_status; uint8_t m_kbdrow; bool m_crtc_vs; bool m_crtc_hs; bool m_motor; bool m_centronics_busy; required_device m_palette; required_device m_maincpu; required_region_ptr m_p_chargen; required_device m_cass; required_device m_crtc; required_ioport_array<8> m_io_keyboard; required_device m_dma; required_device m_u12; required_device m_centronics; required_device m_fdc; required_device m_floppy0; required_device m_floppy1; }; void excali64_state::mem_map(address_map &map) { map(0x0000, 0x1FFF).bankr("bankr1").bankw("bankw1"); map(0x2000, 0x2FFF).bankr("bankr2").bankw("bankw2"); map(0x3000, 0x3FFF).bankr("bankr3").bankw("bankw3"); map(0x4000, 0xBFFF).bankr("bankr4").bankw("bankw4"); map(0xC000, 0xFFFF).ram().region("rambank", 0xC000); } void excali64_state::io_map(address_map &map) { map.global_mask(0xff); map(0x00, 0x0f).r(FUNC(excali64_state::port00_r)); map(0x10, 0x11).mirror(0x0e).rw("uart", FUNC(i8251_device::read), FUNC(i8251_device::write)); map(0x20, 0x23).mirror(0x0c).rw("pit", FUNC(pit8253_device::read), FUNC(pit8253_device::write)); map(0x30, 0x30).mirror(0x0e).rw(m_crtc, FUNC(mc6845_device::status_r), FUNC(mc6845_device::address_w)); map(0x31, 0x31).mirror(0x0e).rw(m_crtc, FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w)); map(0x50, 0x5f).r(FUNC(excali64_state::port50_r)); map(0x60, 0x63).mirror(0x0c).rw("ppi", FUNC(i8255_device::read), FUNC(i8255_device::write)); map(0x70, 0x7f).w(FUNC(excali64_state::port70_w)); map(0xe0, 0xe3).rw(m_dma, FUNC(z80dma_device::bus_r), FUNC(z80dma_device::bus_w)); map(0xe4, 0xe7).w(FUNC(excali64_state::porte4_w)); map(0xe8, 0xeb).r(FUNC(excali64_state::porte8_r)); map(0xec, 0xef).w(FUNC(excali64_state::portec_w)); map(0xf0, 0xf3).rw(m_fdc, FUNC(wd2793_device::read), FUNC(wd2793_device::write)); } static INPUT_PORTS_START( excali64 ) PORT_START("KEY.0") /* line 0 */ PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("R") PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R') PORT_CHAR(0x12) PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("W") PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W') PORT_CHAR(0x17) PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Shift") PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1) PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E') PORT_CHAR(0x05) PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("TAB") PORT_CODE(KEYCODE_TAB) PORT_CHAR(0x09) PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("CAPSLOCK") PORT_CODE(KEYCODE_CAPSLOCK) PORT_TOGGLE PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A') PORT_CHAR(0x01) PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Q") PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q') PORT_CHAR(0x11) PORT_START("KEY.1") /* line 1 */ PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F3") PORT_CODE(KEYCODE_F3) PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F2") PORT_CODE(KEYCODE_F2) PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F4") PORT_CODE(KEYCODE_F4) PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Space") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("CTRL") PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_SHIFT_2) PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED) // space PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F1") PORT_CODE(KEYCODE_F1) PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED) // F1 PORT_START("KEY.2") /* line 2 */ PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME(". >") PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("M") PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M') PORT_CHAR(0x0d) PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("/ ?") PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?') PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME(", <") PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B') PORT_CHAR(0x02) PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED) //B PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("N") PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N') PORT_CHAR(0x0e) PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED) //N PORT_START("KEY.3") /* line 3 */ PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("' \"") PORT_CODE(KEYCODE_QUOTE) PORT_CHAR(0x27) PORT_CHAR(0x22) PORT_CHAR(0x27) PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("L") PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L') PORT_CHAR(0x0c) PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("RETURN") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(0x0d) PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("; :") PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR(':') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("J") PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J') PORT_CHAR(0x0a) PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("G") PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G') PORT_CHAR(0x07) PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("K") PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K') PORT_CHAR(0x0b) PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("H") PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H') PORT_CHAR(0x08) PORT_START("KEY.4") /* line 4 */ PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("4 $") PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("2 @") PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('@') PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("5 %") PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%') PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("3 #") PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("DEL") PORT_CODE(KEYCODE_DEL) PORT_CHAR(0x7f) PORT_CHAR(0x7f) PORT_CHAR(0x1f) PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("ESC") PORT_CODE(KEYCODE_ESC) PORT_CHAR(0x1b) PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("1 !") PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!') PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("INS") PORT_CODE(KEYCODE_INSERT) PORT_START("KEY.5") /* line 5 */ PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("[ {") PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[') PORT_CHAR('{') PORT_CHAR(0x1b) PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("O") PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O') PORT_CHAR(0x0f) PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("] }") PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(']') PORT_CHAR('}') PORT_CHAR(0x1d) PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("P") PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P') PORT_CHAR(0x10) PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("U") PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U') PORT_CHAR(0x15) PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("T") PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T') PORT_CHAR(0x14) PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("I") PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I') PORT_CHAR(0x09) PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Y") PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y') PORT_CHAR(0x19) PORT_START("KEY.6") /* line 6 */ PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F') PORT_CHAR(0x06) PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("X") PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X') PORT_CHAR(0x18) PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("V") PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V') PORT_CHAR(0x16) PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C') PORT_CHAR(0x03) PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D') PORT_CHAR(0x04) PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("S") PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S') PORT_CHAR(0x13) PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Z") PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z') PORT_CHAR(0x1a) PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED) //Z PORT_START("KEY.7") /* line 7 */ PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("= +") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=') PORT_CHAR('+') PORT_CHAR('=') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("0 )") PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR(')') PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Backspace") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(0x08) PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("- _") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('_') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("8 *") PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('*') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("6 ^") PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('^') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("9 (") PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR('(') PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("7 &") PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('&') INPUT_PORTS_END WRITE_LINE_MEMBER( excali64_state::cent_busy_w ) { m_centronics_busy = state; } FLOPPY_FORMATS_MEMBER( excali64_state::floppy_formats ) FLOPPY_EXCALI64_FORMAT FLOPPY_FORMATS_END static void excali64_floppies(device_slot_interface &device) { device.option_add("525qd", FLOPPY_525_QD); } // pulses from port E4 bit 5 restart the 74123. After 3.6 secs without a pulse, the motor gets turned off. WRITE_LINE_MEMBER( excali64_state::motor_w ) { m_motor = state; m_floppy1->get_device()->mon_w(!m_motor); m_floppy0->get_device()->mon_w(!m_motor); } READ8_MEMBER( excali64_state::porte8_r ) { return 0xfc | (uint8_t)m_motor; } WRITE8_MEMBER( excali64_state::porte4_w ) { floppy_image_device *floppy = nullptr; if (BIT(data, 0)) floppy = m_floppy0->get_device(); if (BIT(data, 1)) floppy = m_floppy1->get_device(); m_fdc->set_floppy(floppy); if (floppy) floppy->ss_w(BIT(data, 4)); m_u12->b_w(BIT(data, 5)); // motor pulse } /* d0 = precomp (selectable by jumper) d1 = size select d2 = density select (0 = double) */ WRITE8_MEMBER( excali64_state::portec_w ) { m_fdc->enmf_w(BIT(data, 1)); m_fdc->dden_w(BIT(data, 2)); } WRITE_LINE_MEMBER( excali64_state::busreq_w ) { // since our Z80 has no support for BUSACK, we assume it is granted immediately m_maincpu->set_input_line(Z80_INPUT_LINE_BUSRQ, state); m_dma->bai_w(state); // tell dma that bus has been granted } READ8_MEMBER( excali64_state::memory_read_byte ) { address_space& prog_space = m_maincpu->space(AS_PROGRAM); return prog_space.read_byte(offset); } WRITE8_MEMBER( excali64_state::memory_write_byte ) { address_space& prog_space = m_maincpu->space(AS_PROGRAM); prog_space.write_byte(offset, data); } READ8_MEMBER( excali64_state::io_read_byte ) { address_space& prog_space = m_maincpu->space(AS_IO); return prog_space.read_byte(offset); } WRITE8_MEMBER( excali64_state::io_write_byte ) { address_space& prog_space = m_maincpu->space(AS_IO); prog_space.write_byte(offset, data); } WRITE8_MEMBER( excali64_state::ppib_w ) { m_kbdrow = data; } READ8_MEMBER( excali64_state::ppic_r ) { uint8_t data = 0xf4; // READY line must be low to print data |= (uint8_t)m_centronics_busy; data |= (m_cass->input() > 0.1) << 3; return data; } WRITE8_MEMBER( excali64_state::ppic_w ) { m_cass->output(BIT(data, 7) ? -1.0 : +1.0); m_centronics->write_strobe(BIT(data, 4)); } READ8_MEMBER( excali64_state::port00_r ) { uint8_t data = 0xff; for (int i = 0; i < 8; i++) { if (!BIT(m_kbdrow, i)) data &= m_io_keyboard[i]->read(); } return data; } /* d0 : /rom ; screen d1 : ram on d2 : /low ; high res d3 : 2nd colour set (previously, dispen, which is a mistake in hardware and schematic) d4 : vsync d5 : rombank */ READ8_MEMBER( excali64_state::port50_r ) { uint8_t data = m_sys_status & 0x2f; bool csync = m_crtc_hs | m_crtc_vs; data |= (uint8_t)csync << 4; return data; } /* d0,1,2,3,5 : same as port50 (schematic wrongly says d7 used for 2nd colour set) */ WRITE8_MEMBER( excali64_state::port70_w ) { m_sys_status = data; m_crtc->set_unscaled_clock(BIT(data, 2) ? 2e6 : 1e6); if (BIT(data, 1)) { // select 64k ram membank("bankr1")->set_entry(0); membank("bankr2")->set_entry(0); membank("bankr3")->set_entry(0); membank("bankr4")->set_entry(0); membank("bankw2")->set_entry(0); membank("bankw3")->set_entry(0); membank("bankw4")->set_entry(0); } else if (BIT(data, 0)) { // select videoram and hiresram membank("bankr1")->set_entry(1); membank("bankr2")->set_entry(2); membank("bankr3")->set_entry(2); membank("bankw2")->set_entry(2); membank("bankw3")->set_entry(2); membank("bankr4")->set_entry(2); membank("bankw4")->set_entry(2); } else { // select rom, videoram, and main ram membank("bankr1")->set_entry(1); membank("bankr2")->set_entry(1); membank("bankr3")->set_entry(1); membank("bankw2")->set_entry(2); membank("bankw3")->set_entry(2); membank("bankr4")->set_entry(0); membank("bankw4")->set_entry(0); } // other half of ROM_1 if ((data & 0x22) == 0x20) membank("bankr1")->set_entry(2); } void excali64_state::machine_reset() { membank("bankr1")->set_entry(1); // read from ROM membank("bankr2")->set_entry(1); // read from ROM membank("bankr3")->set_entry(1); // read from ROM membank("bankr4")->set_entry(0); // read from RAM membank("bankw1")->set_entry(0); // write to RAM membank("bankw2")->set_entry(2); // write to videoram membank("bankw3")->set_entry(2); // write to videoram hires pointers membank("bankw4")->set_entry(0); // write to RAM m_maincpu->reset(); } WRITE_LINE_MEMBER( excali64_state::crtc_hs ) { m_crtc_hs = state; } WRITE_LINE_MEMBER( excali64_state::crtc_vs ) { m_crtc_vs = state; } /* F4 Character Displayer */ static const gfx_layout excali64_charlayout = { 8, 12, /* 8 x 12 characters */ 256, /* 256 characters */ 1, /* 1 bits per pixel */ { 0 }, /* no bitplanes */ /* x offsets */ { 7, 6, 5, 4, 3, 2, 1, 0 }, /* y offsets */ { 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 /* every char takes 16 bytes */ }; static GFXDECODE_START( gfx_excali64 ) GFXDECODE_ENTRY( "chargen", 0x0000, excali64_charlayout, 0, 1 ) GFXDECODE_END // The prom, the schematic, and the manual all contradict each other, // so the colours can only be described as wild guesses. Further, the 38 // colour-load resistors are missing labels and values. void excali64_state::excali64_palette(palette_device &palette) { // do this here because driver_init hasn't run yet m_p_videoram = memregion("videoram")->base(); m_p_hiresram = m_p_videoram + 0x2000; uint8_t *main = memregion("roms")->base(); uint8_t *ram = memregion("rambank")->base(); // main ram (cp/m mode) membank("bankr1")->configure_entry(0, &ram[0x0000]); membank("bankr2")->configure_entry(0, &ram[0x2000]); membank("bankr3")->configure_entry(0, &ram[0x3000]); membank("bankr4")->configure_entry(0, &ram[0x4000]);//boot membank("bankw1")->configure_entry(0, &ram[0x0000]);//boot membank("bankw2")->configure_entry(0, &ram[0x2000]); membank("bankw3")->configure_entry(0, &ram[0x3000]); membank("bankw4")->configure_entry(0, &ram[0x4000]);//boot // rom_1 membank("bankr1")->configure_entry(1, &main[0x0000]);//boot membank("bankr1")->configure_entry(2, &main[0x2000]); // rom_2 membank("bankr2")->configure_entry(1, &main[0x4000]);//boot membank("bankr3")->configure_entry(1, &main[0x5000]);//boot // videoram membank("bankr2")->configure_entry(2, &m_p_videoram[0x0000]); membank("bankw2")->configure_entry(2, &m_p_videoram[0x0000]);//boot // hiresram membank("bankr3")->configure_entry(2, &m_p_videoram[0x1000]); membank("bankw3")->configure_entry(2, &m_p_videoram[0x1000]);//boot membank("bankr4")->configure_entry(2, &m_p_hiresram[0x0000]); membank("bankw4")->configure_entry(2, &m_p_hiresram[0x0000]); // Set up foreground colours for (uint8_t i = 0; i < 32; i++) { uint8_t const code = m_p_chargen[0x1000+i]; uint8_t const r = (BIT(code, 0) ? 38 : 0) + (BIT(code, 1) ? 73 : 0) + (BIT(code, 2) ? 144 : 0); uint8_t const b = (BIT(code, 3) ? 38 : 0) + (BIT(code, 4) ? 73 : 0) + (BIT(code, 5) ? 144 : 0); uint8_t const g = (BIT(code, 6) ? 85 : 0) + (BIT(code, 7) ? 170 : 0); palette.set_pen_color(i, r, g, b); } // Background palette.set_pen_color(32, 0x00, 0x00, 0x00); // 0 Black palette.set_pen_color(33, 0xff, 0x00, 0x00); // 1 Red palette.set_pen_color(34, 0x00, 0x00, 0xff); // 2 Blue palette.set_pen_color(35, 0xff, 0x00, 0xff); // 3 Magenta palette.set_pen_color(36, 0x00, 0xff, 0x00); // 4 Green palette.set_pen_color(37, 0xff, 0xff, 0x00); // 5 Yellow palette.set_pen_color(38, 0x00, 0xff, 0xff); // 6 Cyan palette.set_pen_color(39, 0xff, 0xff, 0xff); // 7 White } MC6845_UPDATE_ROW( excali64_state::update_row ) { const rgb_t *palette = m_palette->palette()->entry_list_raw(); uint8_t chr,gfx,col,bg,fg; uint16_t mem,x; uint8_t col_base = BIT(m_sys_status, 3) ? 16 : 0; uint32_t *p = &bitmap.pix32(y); for (x = 0; x < x_count; x++) { mem = (ma + x) & 0x7ff; chr = m_p_videoram[mem]; col = m_p_videoram[mem+0x800]; fg = col_base + (col >> 4); bg = 32 + ((col >> 1) & 7); if (BIT(col, 0)) { uint8_t h = m_p_videoram[mem+0x1000] - 4; if (h > 5) h = 0; // keep us in bounds // hires definition - pixels are opposite order to characters gfx = bitswap<8>(m_p_hiresram[(h << 12) | (chr<<4) | ra], 0, 1, 2, 3, 4, 5, 6, 7); } else gfx = m_p_chargen[(chr<<4) | ra]; // normal character gfx ^= (x == cursor_x) ? 0xff : 0; /* Display a scanline of a character */ *p++ = palette[BIT(gfx, 0) ? fg : bg]; *p++ = palette[BIT(gfx, 1) ? fg : bg]; *p++ = palette[BIT(gfx, 2) ? fg : bg]; *p++ = palette[BIT(gfx, 3) ? fg : bg]; *p++ = palette[BIT(gfx, 4) ? fg : bg]; *p++ = palette[BIT(gfx, 5) ? fg : bg]; *p++ = palette[BIT(gfx, 6) ? fg : bg]; *p++ = palette[BIT(gfx, 7) ? fg : bg]; } } void excali64_state::excali64(machine_config &config) { /* basic machine hardware */ Z80(config, m_maincpu, 16_MHz_XTAL / 4); m_maincpu->set_addrmap(AS_PROGRAM, &excali64_state::mem_map); m_maincpu->set_addrmap(AS_IO, &excali64_state::io_map); I8251(config, "uart", 0); //uart.txd_handler().set("rs232", FUNC(rs232_port_device::write_txd)); //uart.rts_handler().set("rs232", FUNC(rs232_port_device::write_rts)); pit8253_device &pit(PIT8253(config, "pit", 0)); pit.set_clk<0>(16_MHz_XTAL / 16); /* Timer 0: tone gen for speaker */ pit.out_handler<0>().set("speaker", FUNC(speaker_sound_device::level_w)); //pit.set_clk<1>(16_MHz_XTAL / 16); /* Timer 1: baud rate gen for 8251 */ //pit.out_handler<1>().set(FUNC(excali64_state::write_uart_clock)); //pit.set_clk<2>(16_MHz_XTAL / 16); /* Timer 2: not used */ i8255_device &ppi(I8255A(config, "ppi")); ppi.out_pa_callback().set("cent_data_out", FUNC(output_latch_device::bus_w)); // parallel port ppi.out_pb_callback().set(FUNC(excali64_state::ppib_w)); ppi.in_pc_callback().set(FUNC(excali64_state::ppic_r)); ppi.out_pc_callback().set(FUNC(excali64_state::ppic_w)); /* sound hardware */ SPEAKER(config, "mono").front_center(); SPEAKER_SOUND(config, "speaker").add_route(ALL_OUTPUTS, "mono", 0.50); /* Video hardware */ screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER)); screen.set_refresh_hz(50); screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */ screen.set_size(80*8, 24*12); screen.set_visarea_full(); screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update)); PALETTE(config, m_palette, FUNC(excali64_state::excali64_palette), 40); GFXDECODE(config, "gfxdecode", m_palette, gfx_excali64); MC6845(config, m_crtc, 16_MHz_XTAL / 16); // 1MHz for lowres; 2MHz for highres m_crtc->set_screen("screen"); m_crtc->set_show_border_area(false); m_crtc->set_char_width(8); m_crtc->set_update_row_callback(FUNC(excali64_state::update_row)); m_crtc->out_hsync_callback().set(FUNC(excali64_state::crtc_hs)); m_crtc->out_vsync_callback().set(FUNC(excali64_state::crtc_vs)); /* Devices */ CASSETTE(config, m_cass); m_cass->add_route(ALL_OUTPUTS, "mono", 0.05); WD2793(config, m_fdc, 16_MHz_XTAL / 8); m_fdc->drq_wr_callback().set(m_dma, FUNC(z80dma_device::rdy_w)); FLOPPY_CONNECTOR(config, "fdc:0", excali64_floppies, "525qd", excali64_state::floppy_formats).enable_sound(true); FLOPPY_CONNECTOR(config, "fdc:1", excali64_floppies, "525qd", excali64_state::floppy_formats).enable_sound(true); Z80DMA(config, m_dma, 16_MHz_XTAL / 4); m_dma->out_busreq_callback().set(FUNC(excali64_state::busreq_w)); m_dma->in_mreq_callback().set(FUNC(excali64_state::memory_read_byte)); m_dma->out_mreq_callback().set(FUNC(excali64_state::memory_write_byte)); m_dma->in_iorq_callback().set(FUNC(excali64_state::io_read_byte)); m_dma->out_iorq_callback().set(FUNC(excali64_state::io_write_byte)); TTL74123(config, m_u12, 0); m_u12->set_connection_type(TTL74123_GROUNDED); /* Hook up type (no idea what this means) */ m_u12->set_resistor_value(RES_K(100)); /* resistor connected between RCext & 5v */ m_u12->set_capacitor_value(CAP_U(100)); /* capacitor connected between Cext and RCext */ m_u12->set_a_pin_value(0); /* A pin - grounded */ m_u12->set_b_pin_value(1); /* B pin - driven by port e4 bit 5 */ m_u12->set_clear_pin_value(1); /* Clear pin - pulled high */ m_u12->out_cb().set(FUNC(excali64_state::motor_w)); CENTRONICS(config, m_centronics, centronics_devices, "printer"); m_centronics->busy_handler().set(FUNC(excali64_state::cent_busy_w)); output_latch_device ¢_data_out(OUTPUT_LATCH(config, "cent_data_out")); m_centronics->set_output_latch(cent_data_out); } /* ROM definition */ ROM_START( excali64 ) ROM_REGION(0x6000, "roms", 0) ROM_LOAD( "rom_1.ic17", 0x0000, 0x4000, CRC(e129a305) SHA1(e43ec7d040c2b2e548d22fd6bbc7df8b45a26e5a) ) ROM_LOAD( "rom_2.ic24", 0x4000, 0x2000, CRC(916d9f5a) SHA1(91c527cce963481b7bebf077e955ca89578bb553) ) // fix a bug that causes screen to be filled with 'p' ROM_FILL(0x4ee, 1, 0) ROM_FILL(0x4ef, 1, 8) ROM_FILL(0x4f6, 1, 0) ROM_FILL(0x4f7, 1, 8) // patch out the protection ROM_FILL(0x3ce7, 1, 0) ROM_REGION(0x10000, "rambank", ROMREGION_ERASE00) ROM_REGION(0xA000, "videoram", ROMREGION_ERASE00) ROM_REGION(0x1020, "chargen", 0) ROM_LOAD( "genex_3.ic43", 0x0000, 0x1000, CRC(b91619a9) SHA1(2ced636cb7b94ba9d329868d7ecf79963cefe9d9) ) ROM_LOAD( "hm7603.ic55", 0x1000, 0x0020, CRC(c74f47dc) SHA1(331ff3c913846191ddd97cacb80bd19438c1ff71) ) ROM_END /* Driver */ // YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS COMP( 1984, excali64, 0, 0, excali64, excali64, excali64_state, empty_init, "BGR Computers", "Excalibur 64", 0 )