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Diffstat (limited to 'src/mame/drivers/excali64.cpp')
-rw-r--r-- | src/mame/drivers/excali64.cpp | 647 |
1 files changed, 647 insertions, 0 deletions
diff --git a/src/mame/drivers/excali64.cpp b/src/mame/drivers/excali64.cpp new file mode 100644 index 00000000000..3e4664ca913 --- /dev/null +++ b/src/mame/drivers/excali64.cpp @@ -0,0 +1,647 @@ +// 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 "cpu/z80/z80.h" +#include "video/mc6845.h" +#include "machine/i8251.h" +#include "bus/rs232/rs232.h" +//#include "machine/clock.h" +#include "machine/pit8253.h" +#include "machine/i8255.h" +#include "bus/centronics/ctronics.h" +#include "imagedev/cassette.h" +#include "sound/wave.h" +#include "sound/speaker.h" +#include "machine/z80dma.h" +#include "machine/rescap.h" +#include "machine/74123.h" +#include "machine/wd_fdc.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_cass(*this, "cassette") + , m_crtc(*this, "crtc") + , m_io_keyboard(*this, "KEY") + , 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") + { } + + DECLARE_PALETTE_INIT(excali64); + 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_WRITE8_MEMBER(motor_w); + DECLARE_MACHINE_RESET(excali64); + required_device<palette_device> m_palette; + +private: + const UINT8 *m_p_chargen; + UINT8 *m_p_videoram; + UINT8 *m_p_hiresram; + UINT8 m_sys_status; + UINT8 m_kbdrow; + bool m_crtc_vs; + bool m_crtc_hs; + bool m_motor; + bool m_centronics_busy; + required_device<cpu_device> m_maincpu; + 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_t> m_fdc; + required_device<floppy_connector> m_floppy0; + required_device<floppy_connector> m_floppy1; +}; + +static ADDRESS_MAP_START(excali64_mem, AS_PROGRAM, 8, excali64_state) + AM_RANGE(0x0000, 0x1FFF) AM_READ_BANK("bankr1") AM_WRITE_BANK("bankw1") + AM_RANGE(0x2000, 0x2FFF) AM_READ_BANK("bankr2") AM_WRITE_BANK("bankw2") + AM_RANGE(0x3000, 0x3FFF) AM_READ_BANK("bankr3") AM_WRITE_BANK("bankw3") + AM_RANGE(0x4000, 0xBFFF) AM_READ_BANK("bankr4") AM_WRITE_BANK("bankw4") + AM_RANGE(0xC000, 0xFFFF) AM_RAM AM_REGION("rambank", 0xC000) +ADDRESS_MAP_END + +static ADDRESS_MAP_START(excali64_io, AS_IO, 8, excali64_state) + ADDRESS_MAP_GLOBAL_MASK(0xff) + AM_RANGE(0x00, 0x0f) AM_READ(port00_r) + AM_RANGE(0x10, 0x10) AM_MIRROR(0x0e) AM_DEVREADWRITE("uart",i8251_device, data_r, data_w) + AM_RANGE(0x11, 0x11) AM_MIRROR(0x0e) AM_DEVREADWRITE("uart", i8251_device, status_r, control_w) + AM_RANGE(0x20, 0x23) AM_MIRROR(0x0c) AM_DEVREADWRITE("pit", pit8253_device, read, write) + AM_RANGE(0x30, 0x30) AM_MIRROR(0x0e) AM_DEVREADWRITE("crtc", mc6845_device, status_r, address_w) + AM_RANGE(0x31, 0x31) AM_MIRROR(0x0e) AM_DEVREADWRITE("crtc", mc6845_device, register_r, register_w) + AM_RANGE(0x50, 0x5f) AM_READ(port50_r) + AM_RANGE(0x60, 0x63) AM_MIRROR(0x0c) AM_DEVREADWRITE("ppi", i8255_device, read, write) + AM_RANGE(0x70, 0x7f) AM_WRITE(port70_w) + AM_RANGE(0xe0, 0xe3) AM_DEVREADWRITE("dma", z80dma_device, read, write) + AM_RANGE(0xe4, 0xe7) AM_WRITE(porte4_w) + AM_RANGE(0xe8, 0xeb) AM_READ(porte8_r) + AM_RANGE(0xec, 0xef) AM_WRITE(portec_w) + AM_RANGE(0xf0, 0xf3) AM_DEVREADWRITE("fdc", wd2793_t, read, write) +ADDRESS_MAP_END + + +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 SLOT_INTERFACE_START( excali64_floppies ) + SLOT_INTERFACE( "drive0", FLOPPY_525_QD ) + SLOT_INTERFACE( "drive1", FLOPPY_525_QD ) +SLOT_INTERFACE_END + +// pulses from port E4 bit 5 restart the 74123. After 3.6 secs without a pulse, the motor gets turned off. +WRITE8_MEMBER( excali64_state::motor_w ) +{ + m_motor = BIT(data, 0); + 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)m_motor; +} + +WRITE8_MEMBER( excali64_state::porte4_w ) +{ + floppy_image_device *floppy = NULL; + 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(space,offset, BIT(data, 5)); // motor pulse +} + +/* +d0 = precomp (selectable by jumper) +d1 = size select (we only support 13cm) +d2 = density select (0 = double) +*/ +WRITE8_MEMBER( excali64_state::portec_w ) +{ + 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 data = 0xf4; // READY line must be low to print + data |= (UINT8)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 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 data = m_sys_status & 0x2f; + bool csync = m_crtc_hs | m_crtc_vs; + data |= (UINT8)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); +} + +MACHINE_RESET_MEMBER( excali64_state, excali64 ) +{ + 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( 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. +PALETTE_INIT_MEMBER( excali64_state, excali64 ) +{ + // do this here because driver_init hasn't run yet + m_p_videoram = memregion("videoram")->base(); + m_p_chargen = memregion("chargen")->base(); + m_p_hiresram = m_p_videoram + 0x2000; + UINT8 *main = memregion("roms")->base(); + UINT8 *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 + UINT8 r,g,b,i,code; + for (i = 0; i < 32; i++) + { + code = m_p_chargen[0x1000+i]; + r = (BIT(code, 0) ? 38 : 0) + (BIT(code, 1) ? 73 : 0) + (BIT(code, 2) ? 144 : 0); + b = (BIT(code, 3) ? 38 : 0) + (BIT(code, 4) ? 73 : 0) + (BIT(code, 5) ? 144 : 0); + 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 chr,gfx,col,bg,fg; + UINT16 mem,x; + UINT8 col_base = BIT(m_sys_status, 3) ? 16 : 0; + UINT32 *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 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 = BITSWAP8(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]; + } +} + +static MACHINE_CONFIG_START( excali64, excali64_state ) + /* basic machine hardware */ + MCFG_CPU_ADD("maincpu", Z80, XTAL_16MHz / 4) + MCFG_CPU_PROGRAM_MAP(excali64_mem) + MCFG_CPU_IO_MAP(excali64_io) + + MCFG_MACHINE_RESET_OVERRIDE(excali64_state, excali64) + + MCFG_DEVICE_ADD("uart", I8251, 0) + //MCFG_I8251_TXD_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_txd)) + //MCFG_I8251_RTS_HANDLER(DEVWRITELINE("rs232", rs232_port_device, write_rts)) + + MCFG_DEVICE_ADD("pit", PIT8253, 0) + MCFG_PIT8253_CLK0(XTAL_16MHz / 16) /* Timer 0: tone gen for speaker */ + MCFG_PIT8253_OUT0_HANDLER(DEVWRITELINE("speaker", speaker_sound_device, level_w)) + //MCFG_PIT8253_CLK1(XTAL_16MHz / 16) /* Timer 1: baud rate gen for 8251 */ + //MCFG_PIT8253_OUT1_HANDLER(WRITELINE(excali64_state, write_uart_clock)) + //MCFG_PIT8253_CLK2(XTAL_16MHz / 16) /* Timer 2: not used */ + + MCFG_DEVICE_ADD("ppi", I8255A, 0 ) + MCFG_I8255_OUT_PORTA_CB(DEVWRITE8("cent_data_out", output_latch_device, write)) // parallel port + MCFG_I8255_OUT_PORTB_CB(WRITE8(excali64_state, ppib_w)) + MCFG_I8255_IN_PORTC_CB(READ8(excali64_state, ppic_r)) + MCFG_I8255_OUT_PORTC_CB(WRITE8(excali64_state, ppic_w)) + + /* sound hardware */ + MCFG_SPEAKER_STANDARD_MONO("mono") + MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0) + MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50) + MCFG_SOUND_WAVE_ADD(WAVE_TAG, "cassette") + MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25) + + /* Video hardware */ + MCFG_SCREEN_ADD("screen", RASTER) + MCFG_SCREEN_REFRESH_RATE(50) + MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */ + MCFG_SCREEN_SIZE(80*8, 24*12) + MCFG_SCREEN_VISIBLE_AREA(0, 80*8-1, 0, 24*12-1) + MCFG_SCREEN_UPDATE_DEVICE("crtc", mc6845_device, screen_update) + MCFG_PALETTE_ADD("palette", 40) + MCFG_PALETTE_INIT_OWNER(excali64_state, excali64) + MCFG_GFXDECODE_ADD("gfxdecode", "palette", excali64) + MCFG_MC6845_ADD("crtc", MC6845, "screen", XTAL_16MHz / 16) // 1MHz for lowres; 2MHz for highres + MCFG_MC6845_SHOW_BORDER_AREA(false) + MCFG_MC6845_CHAR_WIDTH(8) + MCFG_MC6845_UPDATE_ROW_CB(excali64_state, update_row) + MCFG_MC6845_OUT_HSYNC_CB(WRITELINE(excali64_state, crtc_hs)) + MCFG_MC6845_OUT_VSYNC_CB(WRITELINE(excali64_state, crtc_vs)) + + /* Devices */ + MCFG_CASSETTE_ADD( "cassette" ) + + MCFG_WD2793_ADD("fdc", XTAL_16MHz / 16) + MCFG_WD_FDC_DRQ_CALLBACK(DEVWRITELINE("dma", z80dma_device, rdy_w)) + MCFG_FLOPPY_DRIVE_ADD("fdc:0", excali64_floppies, "drive0", excali64_state::floppy_formats) + MCFG_FLOPPY_DRIVE_SOUND(true) + MCFG_FLOPPY_DRIVE_ADD("fdc:1", excali64_floppies, "drive1", excali64_state::floppy_formats) + MCFG_FLOPPY_DRIVE_SOUND(true) + + MCFG_DEVICE_ADD("dma", Z80DMA, XTAL_16MHz/4) + MCFG_Z80DMA_OUT_BUSREQ_CB(WRITELINE(excali64_state, busreq_w)) + MCFG_Z80DMA_IN_MREQ_CB(READ8(excali64_state, memory_read_byte)) + MCFG_Z80DMA_OUT_MREQ_CB(WRITE8(excali64_state, memory_write_byte)) + MCFG_Z80DMA_IN_IORQ_CB(READ8(excali64_state, io_read_byte)) + MCFG_Z80DMA_OUT_IORQ_CB(WRITE8(excali64_state, io_write_byte)) + + MCFG_DEVICE_ADD("u12", TTL74123, 0) + MCFG_TTL74123_CONNECTION_TYPE(TTL74123_GROUNDED) /* Hook up type (no idea what this means) */ + MCFG_TTL74123_RESISTOR_VALUE(RES_K(100)) /* resistor connected between RCext & 5v */ + MCFG_TTL74123_CAPACITOR_VALUE(CAP_U(100)) /* capacitor connected between Cext and RCext */ + MCFG_TTL74123_A_PIN_VALUE(0) /* A pin - grounded */ + MCFG_TTL74123_B_PIN_VALUE(1) /* B pin - driven by port e4 bit 5 */ + MCFG_TTL74123_CLEAR_PIN_VALUE(1) /* Clear pin - pulled high */ + MCFG_TTL74123_OUTPUT_CHANGED_CB(WRITE8(excali64_state, motor_w)) + + MCFG_CENTRONICS_ADD("centronics", centronics_devices, "printer") + MCFG_CENTRONICS_BUSY_HANDLER(WRITELINE(excali64_state, cent_busy_w)) + MCFG_CENTRONICS_OUTPUT_LATCH_ADD("cent_data_out", "centronics") +MACHINE_CONFIG_END + +/* 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, driver_device, 0, "BGR Computers", "Excalibur 64", 0 ) |