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Diffstat (limited to 'src/mame/drivers/excali64.cpp')
-rw-r--r-- | src/mame/drivers/excali64.cpp | 693 |
1 files changed, 0 insertions, 693 deletions
diff --git a/src/mame/drivers/excali64.cpp b/src/mame/drivers/excali64.cpp deleted file mode 100644 index dde711a63a1..00000000000 --- a/src/mame/drivers/excali64.cpp +++ /dev/null @@ -1,693 +0,0 @@ -// 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: -- When booted it asks for a disk. Press enter to start ROM BASIC. -- 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" - - -namespace { - -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_bankr(*this, "bankr%u", 1U) - , m_bankw(*this, "bankw%u", 1U) - , 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; - virtual void machine_start() override; - -private: - void excali64_palette(palette_device &palette); - void ppib_w(u8 data); - u8 ppic_r(); - void ppic_w(u8 data); - u8 port00_r(); - u8 port50_r(); - void port70_w(u8 data); - void porte4_w(u8 data); - u8 porte8_r(); - void portec_w(u8 data); - static void floppy_formats(format_registration &fr); - DECLARE_WRITE_LINE_MEMBER(cent_busy_w); - DECLARE_WRITE_LINE_MEMBER(busreq_w); - u8 memory_read_byte(offs_t offset); - void memory_write_byte(offs_t offset, u8 data); - u8 io_read_byte(offs_t offset); - void io_write_byte(offs_t offset, u8 data); - 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); - - u8 m_sys_status; - u8 m_kbdrow; - bool m_crtc_vs; - bool m_crtc_hs; - bool m_motor; - bool m_centronics_busy; - std::unique_ptr<u8[]> m_vram; - std::unique_ptr<u8[]> m_hram; - std::unique_ptr<u8[]> m_ram; - required_device<palette_device> m_palette; - required_device<z80_device> m_maincpu; - required_region_ptr<u8> m_p_chargen; - required_memory_bank_array<4> m_bankr; - required_memory_bank_array<4> m_bankw; - required_device<cassette_image_device> m_cass; - required_device<mc6845_device> m_crtc; - required_ioport_array<8> m_io_keyboard; - required_device<z80dma_device> m_dma; - required_device<ttl74123_device> m_u12; - required_device<centronics_device> m_centronics; - required_device<wd2793_device> m_fdc; - required_device<floppy_connector> m_floppy0; - required_device<floppy_connector> m_floppy1; -}; - -void excali64_state::mem_map(address_map &map) -{ - map(0x0000, 0x1fff).bankr(m_bankr[0]).bankw(m_bankw[0]); - map(0x2000, 0x2fff).bankr(m_bankr[1]).bankw(m_bankw[1]); - map(0x3000, 0x3fff).bankr(m_bankr[2]).bankw(m_bankw[2]); - map(0x4000, 0xbfff).bankr(m_bankr[3]).bankw(m_bankw[3]); - map(0xc000, 0xffff).ram(); -} - -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::read), FUNC(z80dma_device::write)); - 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; -} - -void excali64_state::floppy_formats(format_registration &fr) -{ - fr.add_mfm_containers(); - fr.add(FLOPPY_EXCALI64_FORMAT); -} - -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); -} - -u8 excali64_state::porte8_r() -{ - return 0xfc | (u8)m_motor; -} - -void excali64_state::porte4_w(u8 data) -{ - 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) -*/ -void excali64_state::portec_w(u8 data) -{ - 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 -} - -u8 excali64_state::memory_read_byte(offs_t offset) -{ - address_space& prog_space = m_maincpu->space(AS_PROGRAM); - return prog_space.read_byte(offset); -} - -void excali64_state::memory_write_byte(offs_t offset, u8 data) -{ - address_space& prog_space = m_maincpu->space(AS_PROGRAM); - prog_space.write_byte(offset, data); -} - -u8 excali64_state::io_read_byte(offs_t offset) -{ - address_space& prog_space = m_maincpu->space(AS_IO); - return prog_space.read_byte(offset); -} - -void excali64_state::io_write_byte(offs_t offset, u8 data) -{ - address_space& prog_space = m_maincpu->space(AS_IO); - prog_space.write_byte(offset, data); -} - -void excali64_state::ppib_w(u8 data) -{ - m_kbdrow = data; -} - -u8 excali64_state::ppic_r() -{ - u8 data = 0xf4; // READY line must be low to print - data |= (u8)m_centronics_busy; - data |= (m_cass->input() > 0.1) << 3; - return data; -} - -void excali64_state::ppic_w(u8 data) -{ - m_cass->output(BIT(data, 7) ? -1.0 : +1.0); - m_centronics->write_strobe(BIT(data, 4)); -} - -u8 excali64_state::port00_r() -{ - u8 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 -*/ -u8 excali64_state::port50_r() -{ - u8 data = m_sys_status & 0x2f; - bool csync = m_crtc_hs | m_crtc_vs; - data |= (u8)csync << 4; - return data; -} - -/* -d0,1,2,3,5 : same as port50 -(schematic wrongly says d7 used for 2nd colour set) -*/ -void excali64_state::port70_w(u8 data) -{ - m_sys_status = data; - m_crtc->set_unscaled_clock(BIT(data, 2) ? 2e6 : 1e6); - if (BIT(data, 1)) - { - // select 64k ram - m_bankr[0]->set_entry(0); - m_bankr[1]->set_entry(0); - m_bankr[2]->set_entry(0); - m_bankr[3]->set_entry(0); - - m_bankw[1]->set_entry(0); - m_bankw[2]->set_entry(0); - m_bankw[3]->set_entry(0); - } - else if (BIT(data, 0)) - { - // select videoram and hiresram - m_bankr[0]->set_entry(1); - m_bankr[1]->set_entry(2); - m_bankr[2]->set_entry(2); - m_bankr[3]->set_entry(2); - - m_bankw[1]->set_entry(2); - m_bankw[2]->set_entry(2); - m_bankw[3]->set_entry(2); - } - else - { - // select rom, videoram, and main ram - m_bankr[0]->set_entry(1); - m_bankr[1]->set_entry(1); - m_bankr[2]->set_entry(1); - m_bankr[3]->set_entry(0); - - m_bankw[1]->set_entry(2); - m_bankw[2]->set_entry(2); - m_bankw[3]->set_entry(0); - } - - // other half of ROM_1 - if ((data & 0x22) == 0x20) - m_bankr[0]->set_entry(2); -} - -void excali64_state::machine_reset() -{ - m_bankr[0]->set_entry(1); // read from ROM - m_bankr[1]->set_entry(1); // read from ROM - m_bankr[2]->set_entry(1); // read from ROM - m_bankr[3]->set_entry(0); // read from RAM - - m_bankw[0]->set_entry(0); // write to RAM - m_bankw[1]->set_entry(2); // write to videoram - m_bankw[2]->set_entry(2); // write to videoram hires pointers - m_bankw[3]->set_entry(0); // write to RAM - - m_maincpu->reset(); -} - -void excali64_state::machine_start() -{ - save_pointer(NAME(m_vram), 0x2000); - save_pointer(NAME(m_hram), 0x8000); - save_pointer(NAME(m_ram), 0xc000); - save_item(NAME(m_sys_status)); - save_item(NAME(m_kbdrow)); - save_item(NAME(m_crtc_vs)); - save_item(NAME(m_crtc_hs)); - save_item(NAME(m_motor)); - save_item(NAME(m_centronics_busy)); - - m_sys_status = 0; -} -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_vram = make_unique_clear<u8[]>(0x2000); - m_hram = make_unique_clear<u8[]>(0x8000); - m_ram = make_unique_clear<u8[]>(0xc000); - u8 *v = m_vram.get(); - u8 *h = m_hram.get(); - u8 *r = m_ram.get(); - u8 *main = memregion("roms")->base(); - - // main ram (cp/m mode) - m_bankr[0]->configure_entry(0, r); - m_bankr[1]->configure_entry(0, r+0x2000); - m_bankr[2]->configure_entry(0, r+0x3000); - m_bankr[3]->configure_entry(0, r+0x4000);//boot - m_bankw[0]->configure_entry(0, r);//boot - m_bankw[1]->configure_entry(0, r+0x2000); - m_bankw[2]->configure_entry(0, r+0x3000); - m_bankw[3]->configure_entry(0, r+0x4000);//boot - // rom_1 - m_bankr[0]->configure_entry(1, &main[0x0000]);//boot - m_bankr[0]->configure_entry(2, &main[0x2000]); - // rom_2 - m_bankr[1]->configure_entry(1, &main[0x4000]);//boot - m_bankr[2]->configure_entry(1, &main[0x5000]);//boot - // videoram - m_bankr[1]->configure_entry(2, v); - m_bankw[1]->configure_entry(2, v);//boot - // hiresram - m_bankr[2]->configure_entry(2, v+0x1000); - m_bankw[2]->configure_entry(2, v+0x1000);//boot - m_bankr[3]->configure_entry(2, h); - m_bankw[3]->configure_entry(2, h); - - // Set up foreground colours - for (u8 i = 0; i < 32; i++) - { - u8 const code = m_p_chargen[0x1000+i]; - u8 const r = (BIT(code, 0) ? 38 : 0) + (BIT(code, 1) ? 73 : 0) + (BIT(code, 2) ? 144 : 0); - u8 const b = (BIT(code, 3) ? 38 : 0) + (BIT(code, 4) ? 73 : 0) + (BIT(code, 5) ? 144 : 0); - u8 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 ) -{ - rgb_t const *const palette = m_palette->palette()->entry_list_raw(); - u8 const col_base = BIT(m_sys_status, 3) ? 16 : 0; - u32 *p = &bitmap.pix(y); - - for (u16 x = 0; x < x_count; x++) - { - u16 const mem = (ma + x) & 0x7ff; - u8 const chr = m_vram[mem]; - u8 const col = m_vram[mem+0x800]; - u8 const fg = col_base + (col >> 4); - u8 const bg = 32 + ((col >> 1) & 7); - - u8 gfx; - if (BIT(col, 0)) - { - u8 h = m_vram[mem+0x1000] - 4; - if (h > 5) - h = 0; // keep us in bounds - // hires definition - pixels are opposite order to characters - gfx = bitswap<8>(m_hram[(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::write)); // 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); - - SOFTWARE_LIST(config, "flop_list").set_original("excalibur64"); -} - -/* 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(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 - -} // Anonymous namespace - - -/* 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", MACHINE_SUPPORTS_SAVE ) |