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-// license:BSD-3-Clause
-// copyright-holders:Angelo Salese, Robbbert
-/******************************************************************************
-
- MYCOMZ-80A (c) 1981 Japan Electronics College
-
- preliminary driver by Angelo Salese
- additions by Robbbert
-
- THE KEYBOARD
- - Uses a 4MO1003A custom mcu.
- - Every combination is documented in the manual, including the unused ones.
- - All commands must be in uppercase - lowercase will produce errors.
- - There are 5 special keys which do crude editing functions. These are in
- the range 0x61 to 0x75. Kana characters occupy the range 0xa0 to 0xff.
- Graphics characters are found in 0x00 to 0x1f, and 0x80 to 0x9f.
- - Editing characters (hold down shift to get them):
- a - shiftlock (toggle). You can then enter any lowercase character.
- c - clear screen and home cursor
- d - insert
- f - vertical tab (cursor up) You can scroll backwards with this,
- and you can reuse old input lines.
- u - cursor right
- - There are switches on the right-hand side which are connected directly
- to one of the PIAs. The switches (not emulated):
- s2 - ?unknown
- s3 - ?unknown but must be high for the keyboard to function
- s4 - cassette motor on/off
- s5 - ?unknown
- - There is also switch s1 which it is not known what it connects to.
- - Please note: The Takeda 80-column monitor expects the enter key to be the
- line feed key. This is the numpad-enter in our emulation. Strangely, the
- standard monitor, and Basic, will also respond to this key.
- - The keyboard has a "English" key on the left, and a "Japan" key on the
- right. Pressing the appropriate key toggles the input language mode.
- Internally, this turns the Kana bit off/on. On our keyboard, the ALT key
- toggles between English and Kana.
-
- TODO/info:
- - FDC, little info, guessing (143kb, single sided, 525sd)
- - Cassette doesn't load
- - Printer
- - Keyboard lookup table for Kana and Shifted Kana
- - Keyboard autorepeat
- - Need software
-
- Basic:
- - To enter Basic, type BASIC. To quit, type EXIT.
-
- Cassette:
- - Bios 0: you can SAVE and LOAD from the monitor, but not from Basic. (see ToDo)
- - Bios 1: Doesn't seem to be supported.
-
- Sound:
- - Bios 0: Sound is initialised with the volume turned off. In Basic, you
- can POKE 4382,144 to enable sound.
- - Bios 1: Doesn't appear to support sound. The included Basic has a SOUND
- command (e.g SOUND 127,80), but no sound is heard.
-
-*******************************************************************************/
-
-#include "emu.h"
-#include "cpu/z80/z80.h"
-#include "imagedev/cassette.h"
-#include "imagedev/floppy.h"
-#include "machine/i8255.h"
-#include "machine/msm5832.h"
-#include "machine/timer.h"
-#include "machine/wd_fdc.h"
-#include "sound/sn76496.h"
-#include "video/mc6845.h"
-#include "emupal.h"
-#include "screen.h"
-#include "speaker.h"
-
-
-class mycom_state : public driver_device
-{
-public:
- mycom_state(const machine_config &mconfig, device_type type, const char *tag)
- : driver_device(mconfig, type, tag)
- , m_maincpu(*this, "maincpu")
- , m_ppi0(*this, "ppi8255_0")
- , m_ppi1(*this, "ppi8255_1")
- , m_ppi2(*this, "ppi8255_2")
- , m_cass(*this, "cassette")
- , m_crtc(*this, "crtc")
- , m_fdc(*this, "fdc")
- , m_floppy0(*this, "fdc:0")
- , m_floppy1(*this, "fdc:1")
- , m_audio(*this, "sn1")
- , m_rtc(*this, "rtc")
- , m_palette(*this, "palette")
- , m_p_videoram(*this, "vram")
- , m_p_chargen(*this, "chargen")
- { }
-
- void mycom(machine_config &config);
-
- void init_mycom();
-
-private:
- DECLARE_READ8_MEMBER(mycom_upper_r);
- DECLARE_WRITE8_MEMBER(mycom_upper_w);
- DECLARE_READ8_MEMBER(vram_data_r);
- DECLARE_WRITE8_MEMBER(vram_data_w);
- DECLARE_WRITE8_MEMBER(mycom_00_w);
- DECLARE_WRITE8_MEMBER(mycom_04_w);
- DECLARE_WRITE8_MEMBER(mycom_06_w);
- DECLARE_WRITE8_MEMBER(mycom_0a_w);
- DECLARE_READ8_MEMBER(mycom_05_r);
- DECLARE_READ8_MEMBER(mycom_06_r);
- DECLARE_READ8_MEMBER(mycom_08_r);
- TIMER_DEVICE_CALLBACK_MEMBER(mycom_kbd);
- DECLARE_WRITE8_MEMBER(mycom_rtc_w);
- MC6845_UPDATE_ROW(crtc_update_row);
-
- void mycom_io(address_map &map);
- void mycom_map(address_map &map);
-
- uint8_t m_0a;
- uint16_t m_i_videoram;
- uint8_t m_keyb_press;
- uint8_t m_keyb_press_flag;
- uint8_t m_sn_we;
- uint32_t m_upper_sw;
- uint8_t *m_p_ram;
- virtual void machine_reset() override;
- virtual void machine_start() override;
- required_device<cpu_device> m_maincpu;
- required_device<i8255_device> m_ppi0;
- required_device<i8255_device> m_ppi1;
- required_device<i8255_device> m_ppi2;
- required_device<cassette_image_device> m_cass;
- required_device<mc6845_device> m_crtc;
- required_device<fd1771_device> m_fdc;
- required_device<floppy_connector> m_floppy0;
- required_device<floppy_connector> m_floppy1;
- required_device<sn76489_device> m_audio;
- required_device<msm5832_device> m_rtc;
- required_device<palette_device> m_palette;
- required_region_ptr<u8> m_p_videoram;
- required_region_ptr<u8> m_p_chargen;
-};
-
-
-
-MC6845_UPDATE_ROW( mycom_state::crtc_update_row )
-{
- const rgb_t *palette = m_palette->palette()->entry_list_raw();
- uint8_t chr,gfx=0,z;
- uint16_t mem,x;
- uint32_t *p = &bitmap.pix32(y);
-
- if (m_0a & 0x40)
- {
- for (x = 0; x < x_count; x++) // lores pixels
- {
- uint8_t dbit=1;
- if (x == cursor_x) dbit=0;
- mem = (ma + x) & 0x7ff;
- chr = m_p_videoram[mem];
- z = ra / 3;
- *p++ = palette[BIT( chr, z ) ? dbit: dbit^1];
- *p++ = palette[BIT( chr, z ) ? dbit: dbit^1];
- *p++ = palette[BIT( chr, z ) ? dbit: dbit^1];
- *p++ = palette[BIT( chr, z ) ? dbit: dbit^1];
- z += 4;
- *p++ = palette[BIT( chr, z ) ? dbit: dbit^1];
- *p++ = palette[BIT( chr, z ) ? dbit: dbit^1];
- *p++ = palette[BIT( chr, z ) ? dbit: dbit^1];
- *p++ = palette[BIT( chr, z ) ? dbit: dbit^1];
- }
- }
- else
- {
- for (x = 0; x < x_count; x++) // text
- {
- uint8_t inv=0;
- if (x == cursor_x) inv=0xff;
- mem = (ma + x) & 0x7ff;
- if (ra > 7)
- gfx = inv; // some blank spacing lines
- else
- {
- chr = m_p_videoram[mem];
- gfx = m_p_chargen[(chr<<3) | ra] ^ inv;
- }
-
- /* Display a scanline of a character */
- *p++ = palette[BIT(gfx, 7)];
- *p++ = palette[BIT(gfx, 6)];
- *p++ = palette[BIT(gfx, 5)];
- *p++ = palette[BIT(gfx, 4)];
- *p++ = palette[BIT(gfx, 3)];
- *p++ = palette[BIT(gfx, 2)];
- *p++ = palette[BIT(gfx, 1)];
- *p++ = palette[BIT(gfx, 0)];
- }
- }
-}
-
-WRITE8_MEMBER( mycom_state::mycom_00_w )
-{
- switch(data)
- {
- case 0x00: membank("boot")->set_entry(1); break;
- case 0x01: membank("boot")->set_entry(0); break;
- case 0x02: m_upper_sw = 0x10000; break;
- case 0x03: m_upper_sw = 0x0c000; break;
- }
-}
-
-READ8_MEMBER( mycom_state::mycom_upper_r )
-{
- return m_p_ram[offset | m_upper_sw];
-}
-
-WRITE8_MEMBER( mycom_state::mycom_upper_w )
-{
- m_p_ram[offset | 0xc000] = data;
-}
-
-READ8_MEMBER( mycom_state::vram_data_r )
-{
- return m_p_videoram[m_i_videoram];
-}
-
-WRITE8_MEMBER( mycom_state::vram_data_w )
-{
- m_p_videoram[m_i_videoram] = data;
-}
-
-void mycom_state::mycom_map(address_map &map)
-{
- map.unmap_value_high();
- map(0x0000, 0x0fff).bankrw("boot");
- map(0x1000, 0xbfff).ram();
- map(0xc000, 0xffff).rw(FUNC(mycom_state::mycom_upper_r), FUNC(mycom_state::mycom_upper_w));
-}
-
-void mycom_state::mycom_io(address_map &map)
-{
- map.global_mask(0xff);
- map(0x00, 0x00).w(FUNC(mycom_state::mycom_00_w));
- map(0x01, 0x01).rw(FUNC(mycom_state::vram_data_r), FUNC(mycom_state::vram_data_w));
- map(0x02, 0x02).rw(m_crtc, FUNC(mc6845_device::status_r), FUNC(mc6845_device::address_w));
- map(0x03, 0x03).rw(m_crtc, FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w));
- map(0x04, 0x07).rw(m_ppi0, FUNC(i8255_device::read), FUNC(i8255_device::write));
- map(0x08, 0x0b).rw(m_ppi1, FUNC(i8255_device::read), FUNC(i8255_device::write));
- map(0x0c, 0x0f).rw(m_ppi2, FUNC(i8255_device::read), FUNC(i8255_device::write));
- map(0x10, 0x13).rw(m_fdc, FUNC(fd1771_device::read), FUNC(fd1771_device::write));
-}
-
-/* Input ports */
-static INPUT_PORTS_START( mycom )
- PORT_START("X0")
- PORT_BIT(0x001,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("ESC") PORT_CHAR(27)
- PORT_BIT(0x100,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("RETURN") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
-
- PORT_START("X1")
- PORT_BIT(0x002,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("1 !") PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
- PORT_BIT(0x004,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("2 \"") PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('"')
- PORT_BIT(0x008,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("3 #") PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
- PORT_BIT(0x010,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("4 $") PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
- PORT_BIT(0x020,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("5 %") PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
- PORT_BIT(0x040,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("6 &") PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&')
- PORT_BIT(0x080,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("7 '") PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'')
- PORT_BIT(0x100,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("8 (") PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(')
- PORT_BIT(0x200,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("9 )") PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')')
-
- PORT_START("X2")
- PORT_BIT(0x002,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("Q") PORT_CODE(KEYCODE_Q) PORT_CHAR('Q') PORT_CHAR('q') PORT_CHAR(17)
- PORT_BIT(0x004,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("W") PORT_CODE(KEYCODE_W) PORT_CHAR('W') PORT_CHAR('w') PORT_CHAR(23)
- PORT_BIT(0x008,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('E') PORT_CHAR('e') PORT_CHAR(5)
- PORT_BIT(0x010,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("R") PORT_CODE(KEYCODE_R) PORT_CHAR('R') PORT_CHAR('r') PORT_CHAR(18)
- PORT_BIT(0x020,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("T") PORT_CODE(KEYCODE_T) PORT_CHAR('T') PORT_CHAR('t') PORT_CHAR(20)
- PORT_BIT(0x040,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("Y") PORT_CODE(KEYCODE_Y) PORT_CHAR('Y') PORT_CHAR('y') PORT_CHAR(25)
- PORT_BIT(0x080,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("U") PORT_CODE(KEYCODE_U) PORT_CHAR('U') PORT_CHAR('u') PORT_CHAR(21)
- PORT_BIT(0x100,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("I") PORT_CODE(KEYCODE_I) PORT_CHAR('I') PORT_CHAR('i') PORT_CHAR(9)
- PORT_BIT(0x200,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("O") PORT_CODE(KEYCODE_O) PORT_CHAR('O') PORT_CHAR('o') PORT_CHAR(15)
-
- PORT_START("X3")
- PORT_BIT(0x002,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('A') PORT_CHAR('a') PORT_CHAR(1)
- PORT_BIT(0x004,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("S") PORT_CODE(KEYCODE_S) PORT_CHAR('S') PORT_CHAR('s') PORT_CHAR(19)
- PORT_BIT(0x008,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('D') PORT_CHAR('d') PORT_CHAR(4)
- PORT_BIT(0x010,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('F') PORT_CHAR('f') PORT_CHAR(6)
- PORT_BIT(0x020,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("G") PORT_CODE(KEYCODE_G) PORT_CHAR('G') PORT_CHAR('g') PORT_CHAR(7)
- PORT_BIT(0x040,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("H") PORT_CODE(KEYCODE_H) PORT_CHAR('H') PORT_CHAR('h') PORT_CHAR(8)
- PORT_BIT(0x080,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("J") PORT_CODE(KEYCODE_J) PORT_CHAR('J') PORT_CHAR('j') PORT_CHAR(10)
- PORT_BIT(0x100,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("K") PORT_CODE(KEYCODE_K) PORT_CHAR('K') PORT_CHAR('k') PORT_CHAR(11)
- PORT_BIT(0x200,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("L") PORT_CODE(KEYCODE_L) PORT_CHAR('L') PORT_CHAR('l') PORT_CHAR(12)
-
- PORT_START("X4")
- PORT_BIT(0x001,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("Tab") PORT_CODE(KEYCODE_TAB) PORT_CHAR(9)
- PORT_BIT(0x002,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("Z") PORT_CODE(KEYCODE_Z) PORT_CHAR('Z') PORT_CHAR('z') PORT_CHAR(26)
- PORT_BIT(0x004,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("X") PORT_CODE(KEYCODE_X) PORT_CHAR('X') PORT_CHAR('x') PORT_CHAR(24)
- PORT_BIT(0x008,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('C') PORT_CHAR('c') PORT_CHAR(3)
- PORT_BIT(0x010,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("V") PORT_CODE(KEYCODE_V) PORT_CHAR('V') PORT_CHAR('v') PORT_CHAR(22)
- PORT_BIT(0x020,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('B') PORT_CHAR('b') PORT_CHAR(2)
- PORT_BIT(0x040,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("N") PORT_CODE(KEYCODE_N) PORT_CHAR('N') PORT_CHAR('n') PORT_CHAR(14)
- PORT_BIT(0x080,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("M") PORT_CODE(KEYCODE_M) PORT_CHAR('M') PORT_CHAR('m') PORT_CHAR(13)
- PORT_BIT(0x100,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("< ,") PORT_CODE(KEYCODE_COMMA) PORT_CHAR('<') PORT_CHAR(',')
- PORT_BIT(0x200,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("> .") PORT_CODE(KEYCODE_STOP) PORT_CHAR('>') PORT_CHAR('.')
-
- PORT_START("X5")
- PORT_BIT(0x020,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("(u)") PORT_CHAR('u')
- PORT_BIT(0x200,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("(c)") PORT_CHAR('c')
-
- PORT_START("X6")
- PORT_BIT(0x001,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CHAR('0')
- PORT_BIT(0x002,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("- =") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('=')
- PORT_BIT(0x004,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("^ ~") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('^') PORT_CHAR('~') PORT_CHAR(30)
- PORT_BIT(0x008,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("\\ _") PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\\') PORT_CHAR('_') PORT_CHAR(28)
- PORT_BIT(0x020,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("(d)") PORT_CHAR('d')
- PORT_BIT(0x200,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("(f)") PORT_CHAR('f')
-
- PORT_START("X7")
- PORT_BIT(0x001,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("P") PORT_CODE(KEYCODE_P) PORT_CHAR('P') PORT_CHAR('p') PORT_CHAR(16)
- PORT_BIT(0x002,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("@ `") PORT_CODE(KEYCODE_TILDE) PORT_CHAR('@') PORT_CHAR('`') PORT_CHAR(0)
- PORT_BIT(0x004,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("[") PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[') PORT_CHAR('{') PORT_CHAR(27)
- PORT_BIT(0x008,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("LineFeed") PORT_CODE(KEYCODE_ENTER_PAD) PORT_CHAR(10)
- PORT_BIT(0x010,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("Backspace") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8)
- PORT_BIT(0x200,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("(a)") PORT_CHAR('a')
-
- PORT_START("X8")
- PORT_BIT(0x001,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("; +") PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR('+')
- PORT_BIT(0x002,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME(": *") PORT_CODE(KEYCODE_QUOTE) PORT_CHAR(':') PORT_CHAR('*')
- PORT_BIT(0x004,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("]") PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(']') PORT_CHAR('}') PORT_CHAR(29)
- PORT_BIT(0x020,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("Space") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
- PORT_BIT(0x200,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("/ ?") PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?')
-
- PORT_START("XX")
- PORT_BIT(0x001,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("CTRL") PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL)
- PORT_BIT(0x002,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("SHIFT") PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT)
- PORT_BIT(0x004,IP_ACTIVE_HIGH,IPT_KEYBOARD) PORT_NAME("KANA") PORT_CODE(KEYCODE_LALT) PORT_CODE(KEYCODE_RALT) PORT_TOGGLE
-INPUT_PORTS_END
-
-
-/* F4 Character Displayer */
-static const gfx_layout mycom_charlayout =
-{
- 8, 8, /* 8 x 8 characters */
- 256, /* 256 characters */
- 1, /* 1 bits per pixel */
- { 0 }, /* no bitplanes */
- /* x offsets */
- { 0, 1, 2, 3, 4, 5, 6, 7 },
- /* y offsets */
- { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
- 8*8 /* every char takes 8 bytes */
-};
-
-static GFXDECODE_START( gfx_mycom )
- GFXDECODE_ENTRY( "chargen", 0x0000, mycom_charlayout, 0, 1 )
-GFXDECODE_END
-
-WRITE8_MEMBER( mycom_state::mycom_04_w )
-{
- m_i_videoram = (m_i_videoram & 0x700) | data;
-
- m_sn_we = data;
-}
-
-WRITE8_MEMBER( mycom_state::mycom_06_w )
-{
- m_i_videoram = (m_i_videoram & 0x0ff) | ((data & 0x007) << 8);
-}
-
-READ8_MEMBER( mycom_state::mycom_08_r )
-{
- /*
- x--- ---- display flag
- ---- --x- keyboard shift
- ---- ---x keyboard strobe
- */
- uint8_t data = 0;
-
- data = m_keyb_press_flag; //~m_keyb_press_flag & 1;
-
- if ((m_cass)->input() > 0.03) // not working
- data+=4;
-
- return data;
-}
-
-READ8_MEMBER( mycom_state::mycom_06_r )
-{
- /*
- x--- ---- keyboard s5
- -x-- ---- keyboard s4 (motor on/off)
- --x- ---- keyboard s3 (must be high)
- ---x ---- keyboard s2
- */
- return 0xff;
-}
-
-READ8_MEMBER( mycom_state::mycom_05_r )
-{
- return m_keyb_press;
-}
-
-WRITE8_MEMBER( mycom_state::mycom_0a_w )
-{
- /*
- x--- ---- width 80/40 (0 = 80, 1 = 40)
- -x-- ---- video mode (0= tile, 1 = bitmap)
- --x- ---- PSG Chip Select bit
- ---x ---- PSG Write Enable bit
- ---- x--- cmt remote (defaults to on)
- ---- -x-- cmt output
- ---- --x- printer reset
- ---- ---x printer strobe
- */
-
- if ( (BIT(m_0a, 3)) != (BIT(data, 3)) )
- m_cass->change_state(
- BIT(data,3) ? CASSETTE_MOTOR_ENABLED : CASSETTE_MOTOR_DISABLED, CASSETTE_MASK_MOTOR);
-
- if (BIT(data, 3)) // motor on
- m_cass->output( BIT(data, 2) ? -1.0 : +1.0);
-
- if ( (BIT(data, 7)) != (BIT(m_0a, 7)) )
- m_crtc->set_unscaled_clock(BIT(data, 7) ? 1008000 : 2016000);
-
- m_0a = data;
-
- // if WE & CE are low, pass sound command to audio chip
- if ((data & 0x30)==0)
- m_audio->write(m_sn_we);
-}
-
-WRITE8_MEMBER(mycom_state::mycom_rtc_w)
-{
- m_rtc->address_w(data & 0x0f);
-
- m_rtc->hold_w(BIT(data, 4));
- m_rtc->read_w(BIT(data, 5));
- m_rtc->write_w(BIT(data, 6));
- m_rtc->cs_w(BIT(data, 7));
-}
-
-static const uint8_t mycom_keyval[] = { 0,
-0x1b,0x1b,0x7c,0x7c,0x18,0x18,0x0f,0x0f,0x09,0x09,0x1c,0x1c,0x30,0x00,0x50,0x70,0x3b,0x2b,
-0x00,0x00,0x31,0x21,0x51,0x71,0x41,0x61,0x5a,0x7a,0x17,0x17,0x2d,0x3d,0x40,0x60,0x3a,0x2a,
-0x0b,0x0b,0x32,0x22,0x57,0x77,0x53,0x73,0x58,0x78,0x03,0x03,0x5e,0x7e,0x5b,0x7b,0x5d,0x7d,
-0x1f,0x1f,0x33,0x23,0x45,0x65,0x44,0x64,0x43,0x63,0x0c,0x0c,0x5c,0x7c,0x0a,0x0a,0x00,0x00,
-0x01,0x01,0x34,0x24,0x52,0x72,0x46,0x66,0x56,0x76,0x04,0x04,0x7f,0x7f,0x08,0x08,0x0e,0x0e,
-0x02,0x02,0x35,0x25,0x54,0x74,0x47,0x67,0x42,0x62,0x75,0x75,0x64,0x64,0x00,0x00,0x20,0x20,
-0x1e,0x1e,0x36,0x26,0x59,0x79,0x48,0x68,0x4e,0x6e,0x37,0x37,0x34,0x34,0x31,0x31,0x30,0x30,
-0x1d,0x1d,0x37,0x27,0x55,0x75,0x4a,0x6a,0x4d,0x6d,0x38,0x38,0x35,0x35,0x32,0x32,0x11,0x11,
-0x0d,0x0d,0x38,0x28,0x49,0x69,0x4b,0x6b,0x2c,0x3c,0x39,0x39,0x36,0x36,0x33,0x33,0x12,0x12,
-0x07,0x07,0x39,0x29,0x4f,0x6f,0x4c,0x6c,0x2e,0x3e,0x63,0x63,0x66,0x66,0x61,0x61,0x2f,0x3f };
-
-TIMER_DEVICE_CALLBACK_MEMBER(mycom_state::mycom_kbd)
-{
- uint8_t x, y, scancode = 0;
- uint16_t pressed[9];
- char kbdrow[3];
- uint8_t modifiers = ioport("XX")->read();
- uint8_t shift_pressed = (modifiers & 2) >> 1;
- m_keyb_press_flag = 0;
-
- /* see what is pressed */
- for (x = 0; x < 9; x++)
- {
- sprintf(kbdrow,"X%d",x);
- pressed[x] = (ioport(kbdrow)->read());
- }
-
- /* find what has changed */
- for (x = 0; x < 9; x++)
- {
- if (pressed[x])
- {
- /* get scankey value */
- for (y = 0; y < 10; y++)
- {
- if (BIT(pressed[x], y))
- {
- scancode = ((x + y * 9) << 1) + shift_pressed + 1;
- m_keyb_press_flag = 1;
- m_keyb_press = mycom_keyval[scancode];
- }
- }
- }
- }
-
- if (m_keyb_press_flag)
- {
- if (modifiers & 1) m_keyb_press &= 0xbf;
- if (modifiers & 4) m_keyb_press |= 0x80;
- }
-}
-
-
-
-static void mycom_floppies(device_slot_interface &device)
-{
- device.option_add("525sd", FLOPPY_525_SD);
-}
-
-void mycom_state::machine_start()
-{
- m_p_ram = memregion("maincpu")->base();
-}
-
-void mycom_state::machine_reset()
-{
- membank("boot")->set_entry(1);
- m_upper_sw = 0x10000;
- m_0a = 0;
-}
-
-void mycom_state::init_mycom()
-{
- uint8_t *RAM = memregion("maincpu")->base();
- membank("boot")->configure_entries(0, 2, &RAM[0x0000], 0x10000);
-}
-
-void mycom_state::mycom(machine_config &config)
-{
- /* basic machine hardware */
- Z80(config, m_maincpu, 10_MHz_XTAL / 4);
- m_maincpu->set_addrmap(AS_PROGRAM, &mycom_state::mycom_map);
- m_maincpu->set_addrmap(AS_IO, &mycom_state::mycom_io);
-
- I8255(config, m_ppi0);
- m_ppi0->out_pa_callback().set(FUNC(mycom_state::mycom_04_w));
- m_ppi0->in_pb_callback().set(FUNC(mycom_state::mycom_05_r));
- m_ppi0->in_pc_callback().set(FUNC(mycom_state::mycom_06_r));
- m_ppi0->out_pc_callback().set(FUNC(mycom_state::mycom_06_w));
-
- I8255(config, m_ppi1);
- m_ppi1->in_pa_callback().set(FUNC(mycom_state::mycom_08_r));
- m_ppi1->out_pc_callback().set(FUNC(mycom_state::mycom_0a_w));
-
- I8255(config, m_ppi2);
- m_ppi2->in_pb_callback().set(m_rtc, FUNC(msm5832_device::data_r));
- m_ppi2->out_pb_callback().set(m_rtc, FUNC(msm5832_device::data_w));
- m_ppi2->out_pc_callback().set(FUNC(mycom_state::mycom_rtc_w));
-
- /* video hardware */
- screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
- screen.set_refresh_hz(60);
- screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */
- screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update));
- screen.set_size(640, 480);
- screen.set_visarea(0, 320-1, 0, 192-1);
- PALETTE(config, m_palette, palette_device::MONOCHROME);
- GFXDECODE(config, "gfxdecode", m_palette, gfx_mycom);
-
- /* Manual states clock is 1.008mhz for 40 cols, and 2.016 mhz for 80 cols.
- The manual states the CRTC is a HD46505S (apparently same as HD6845S). The start registers need to be readable. */
- HD6845S(config, m_crtc, 1008000);
- 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(mycom_state::crtc_update_row));
-
- SPEAKER(config, "mono").front_center();
- SN76489(config, m_audio, 10_MHz_XTAL / 4).add_route(ALL_OUTPUTS, "mono", 1.50);
-
- /* Devices */
- MSM5832(config, m_rtc, 32.768_kHz_XTAL);
-
- CASSETTE(config, m_cass);
- m_cass->add_route(ALL_OUTPUTS, "mono", 0.05);
-
- FD1771(config, m_fdc, 16_MHz_XTAL / 16);
- FLOPPY_CONNECTOR(config, "fdc:0", mycom_floppies, "525sd", floppy_image_device::default_floppy_formats).enable_sound(true);
- FLOPPY_CONNECTOR(config, "fdc:1", mycom_floppies, "525sd", floppy_image_device::default_floppy_formats).enable_sound(true);
-
- TIMER(config, "keyboard_timer").configure_periodic(FUNC(mycom_state::mycom_kbd), attotime::from_hz(20));
-}
-
-/* ROM definition */
-ROM_START( mycom )
- ROM_REGION( 0x14000, "maincpu", ROMREGION_ERASEFF )
- ROM_DEFAULT_BIOS("mycom")
- ROM_SYSTEM_BIOS(0, "mycom", "40 column")
- ROMX_LOAD("bios0.rom", 0x10000, 0x3000, CRC(e6f50355) SHA1(5d3acea360c0a8ab547db03a43e1bae5125f9c2a), ROM_BIOS(0))
- ROMX_LOAD("basic0.rom",0x13000, 0x1000, CRC(3b077465) SHA1(777427182627f371542c5e0521ed3ca1466a90e1), ROM_BIOS(0))
- ROM_SYSTEM_BIOS(1, "takeda", "80 column")
- ROMX_LOAD("bios1.rom", 0x10000, 0x3000, CRC(c51d7fcb) SHA1(31d39db43b77cca4d49ff9814d531e056924e716), ROM_BIOS(1))
- ROMX_LOAD("basic1.rom",0x13000, 0x1000, CRC(30a573f1) SHA1(e3fe2e73644e831b52e2789dc7c181989cc30b82), ROM_BIOS(1))
- /* Takeda bios has no cursor. Use the next lines to turn on cursor, but you must comment out when done. */
- //ROM_FILL( 0x11eb6, 1, 0x47 )
- //ROM_FILL( 0x11eb7, 1, 0x07 )
-
- ROM_REGION( 0x0800, "vram", ROMREGION_ERASE00 )
-
- ROM_REGION( 0x0800, "chargen", 0 )
- ROM_LOAD( "font.rom", 0x0000, 0x0800, CRC(4039bb6f) SHA1(086ad303bf4bcf983fd6472577acbf744875fea8) )
-ROM_END
-
-/* Driver */
-
-// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
-COMP( 1981, mycom, 0, 0, mycom, mycom, mycom_state, init_mycom, "Japan Electronics College", "MYCOMZ-80A", MACHINE_NOT_WORKING )