summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/drivers/excali64.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/mame/drivers/excali64.cpp')
-rw-r--r--src/mame/drivers/excali64.cpp693
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 &cent_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 )