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// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic
/***************************************************************************

BK driver by Miodrag Milanovic

2008-03-10 Preliminary driver.


TODO:
- Tape motor on/off to be emulated.

- BK0010 - error message at start - thrown into monitor. H for help.
  Can use M to load a tape. How to run it?

- BK001001 - can load its own recordings, but cannot proceed past the header
  of software-list items.
  However...if you enter the Monitor with MON, enter M, enter the filename
  (case sensitive), start tape - it loads. But then, how to run it?

- BK0010FD - continually reboots. The system expects a rom at A000. Can be
  patched by writing 0087 to address A000 in the debugger at start.

- BK0011M - black screen. No emulation of this variant has been done.
- BK0011M - 128KB RAM, clock speed 4MHz by default, floppy drive facility.

****************************************************************************/


#include "emu.h"
#include "includes/bk.h"

#include "formats/rk_cas.h"

#include "emupal.h"
#include "screen.h"
#include "speaker.h"


/* Address maps */
void bk_state::bk0010_mem(address_map &map)
{
	map.unmap_value_high();
	map(0x0000, 0x3fff).ram();
	map(0x4000, 0x7fff).ram().share("videoram");
	map(0x8000, 0xfeff).rom().region("maincpu",0);
	map(0xffb0, 0xffb1).rw(FUNC(bk_state::key_state_r), FUNC(bk_state::key_state_w));
	map(0xffb2, 0xffb3).r(FUNC(bk_state::key_code_r));
	map(0xffb4, 0xffb5).rw(FUNC(bk_state::vid_scroll_r), FUNC(bk_state::vid_scroll_w));
	map(0xffce, 0xffcf).rw(FUNC(bk_state::key_press_r), FUNC(bk_state::key_press_w));
}

void bk_state::bk0010fd_mem(address_map &map)
{
	map.unmap_value_high();
	map(0x0000, 0x3fff).ram();
	map(0x4000, 0x7fff).ram().share("videoram");
	map(0x8000, 0x9fff).rom().region("maincpu",0);
	map(0xa000, 0xdfff).ram();
	map(0xe000, 0xfdff).rom().region("maincpu",0x6000);
	map(0xfe58, 0xfe59).rw(FUNC(bk_state::floppy_cmd_r), FUNC(bk_state::floppy_cmd_w));
	map(0xfe5a, 0xfe5b).rw(FUNC(bk_state::floppy_data_r), FUNC(bk_state::floppy_data_w));
	map(0xffb0, 0xffb1).rw(FUNC(bk_state::key_state_r), FUNC(bk_state::key_state_w));
	map(0xffb2, 0xffb3).r(FUNC(bk_state::key_code_r));
	map(0xffb4, 0xffb5).rw(FUNC(bk_state::vid_scroll_r), FUNC(bk_state::vid_scroll_w));
	map(0xffce, 0xffcf).rw(FUNC(bk_state::key_press_r), FUNC(bk_state::key_press_w));
}

/* Input ports */
static INPUT_PORTS_START( bk0010 )
	PORT_START("LINE0")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Ctrl") PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL)
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Shift") PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED)

	PORT_START("LINE1")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_LEFT) PORT_CHAR(UCHAR_MAMEKEY(LEFT))
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Clear") PORT_CODE(KEYCODE_HOME)
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Rus") PORT_CODE(KEYCODE_LALT)
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Lat") PORT_CODE(KEYCODE_RALT)

	PORT_START("LINE2")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Tab left") PORT_CODE(KEYCODE_PGUP)
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Tab right") PORT_CODE(KEYCODE_PGDN)
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED)

	PORT_START("LINE3")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Delete") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8)
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT))
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_UP) PORT_CHAR(UCHAR_MAMEKEY(UP))
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN))
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED)

	PORT_START("LINE4")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
	PORT_BIT(0xFE, IP_ACTIVE_HIGH, IPT_UNUSED)

	PORT_START("LINE5")
	PORT_BIT(0xFF, IP_ACTIVE_HIGH, IPT_UNUSED)

	PORT_START("LINE6")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0')
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('\"')
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR(0xA4)
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&')
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'')

	PORT_START("LINE7")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(')
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')')
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR(':') PORT_CHAR('*')
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR('+')
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_COMMA) PORT_CHAR('<') PORT_CHAR(',')
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('=') PORT_CHAR('-')
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_STOP) PORT_CHAR('>') PORT_CHAR('.')
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('?') PORT_CHAR('/')

	PORT_START("LINE8")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("<>") PORT_CODE(KEYCODE_END)
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('A') PORT_CHAR('a')
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('B') PORT_CHAR('b')
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('C') PORT_CHAR('c')
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('D') PORT_CHAR('d')
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CHAR('E') PORT_CHAR('e')
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('F') PORT_CHAR('f')
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('G') PORT_CHAR('g')

	PORT_START("LINE9")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('H') PORT_CHAR('h')
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CHAR('I') PORT_CHAR('i')
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('J') PORT_CHAR('j')
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('K') PORT_CHAR('k')
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_L) PORT_CHAR('L') PORT_CHAR('l')
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_M) PORT_CHAR('M') PORT_CHAR('m')
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CHAR('N') PORT_CHAR('n')
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CHAR('O') PORT_CHAR('o')

	PORT_START("LINE10")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('P') PORT_CHAR('p')
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('Q') PORT_CHAR('q')
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('R') PORT_CHAR('r')
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('S') PORT_CHAR('s')
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('T') PORT_CHAR('t')
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_U) PORT_CHAR('U') PORT_CHAR('u')
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('V') PORT_CHAR('v')
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('W') PORT_CHAR('w')

	PORT_START("LINE11")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('X') PORT_CHAR('x')
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('Y') PORT_CHAR('y')
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('Z') PORT_CHAR('z')
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[') PORT_CHAR('{')
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\\') PORT_CHAR('|')
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(']') PORT_CHAR('}')
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("~") PORT_CODE(KEYCODE_TILDE)    // this alone gives nothing and gives ` with Shift!
	PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("=") PORT_CODE(KEYCODE_EQUALS)   // this alone acts like Enter and gives no result with Shift
INPUT_PORTS_END


void bk_state::bk0010(machine_config &config)
{
	/* basic machine hardware */
	T11(config, m_maincpu, 3000000); // FIXME: actually K1801VM1
	m_maincpu->set_initial_mode(0x36ff); /* initial mode word has DAL15,14,11,8 pulled low */
	m_maincpu->set_addrmap(AS_PROGRAM, &bk_state::bk0010_mem);
	m_maincpu->in_iack().set(FUNC(bk_state::irq_callback));

	/* 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(512, 256);
	screen.set_visarea(0, 512-1, 0, 256-1);
	screen.set_screen_update(FUNC(bk_state::screen_update));
	screen.set_palette("palette");

	PALETTE(config, "palette", palette_device::MONOCHROME);

	SPEAKER(config, "mono").front_center();

	CASSETTE(config, m_cassette);
	m_cassette->set_default_state(CASSETTE_STOPPED | CASSETTE_SPEAKER_ENABLED | CASSETTE_MOTOR_ENABLED);
	m_cassette->add_route(ALL_OUTPUTS, "mono", 0.05);
	m_cassette->set_interface("bk0010_cass");

	SOFTWARE_LIST(config, "cass_list").set_original("bk0010");
}

void bk_state::bk0010fd(machine_config &config)
{
	bk0010(config);
	/* basic machine hardware */
	m_maincpu->set_addrmap(AS_PROGRAM, &bk_state::bk0010fd_mem);
}


/* ROM definition */

ROM_START( bk0010 )
	ROM_REGION( 0x8000, "maincpu", ROMREGION_ERASEFF )
	ROM_LOAD( "monit10.rom", 0x0000, 0x2000, CRC(26c6e8a0) SHA1(4e83a94ae5155bbea14d7331a5a8db82457bd5ae) )  // to 8000
	ROM_LOAD( "focal.rom",   0x2000, 0x2000, CRC(717149b7) SHA1(75df26f81ebd281bcb5c55ba81a7d97f31e388b2) )  // to A000
	ROM_LOAD( "tests.rom",   0x6000, 0x1f80, CRC(91aecb4d) SHA1(6b14d552045194a3004bb6b795a2538110921519) )  // to E000
ROM_END

ROM_START( bk001001 )
	ROM_REGION( 0x8000, "maincpu", ROMREGION_ERASEFF )
	ROM_LOAD( "monit10.rom",   0x0000, 0x2000, CRC(26c6e8a0) SHA1(4e83a94ae5155bbea14d7331a5a8db82457bd5ae) ) // to 8000
	ROM_LOAD( "basic10-1.rom", 0x2000, 0x2000, CRC(5e3ff5da) SHA1(5ea4db1eaac87bd0ac96e52a608bc783709f5042) ) // to A000
	ROM_LOAD( "basic10-2.rom", 0x4000, 0x2000, CRC(ea63863c) SHA1(acf068925e4052989b05dd5cf736a1dab5438011) ) // to C000
	ROM_LOAD( "basic10-3.rom", 0x6000, 0x1f80, CRC(63f3df2e) SHA1(b5463f08e7c5f9f5aa31a2e7b6c1ed94fe029d65) ) // to E000
ROM_END

ROM_START( bk0010fd )
	ROM_REGION( 0x8000, "maincpu", ROMREGION_ERASEFF )
	ROM_LOAD( "monit10.rom",  0x0000, 0x2000, CRC(26c6e8a0) SHA1(4e83a94ae5155bbea14d7331a5a8db82457bd5ae) ) // to 8000
	ROM_LOAD( "disk_327.rom", 0x6000, 0x1000, CRC(ed8a43ae) SHA1(28eefbb63047b26e4aec104aeeca74e2f9d0276c) ) // to E000
ROM_END

ROM_START( bk0011m )
	ROM_REGION( 0x1b000, "maincpu", ROMREGION_ERASEFF )
	ROM_LOAD( "bas11m_0.rom", 0x10000, 0x4000, CRC(e71f9339) SHA1(9d76f3eefd64e032c763fa1ebf9cd3d9bd22317a) )
	ROM_LOAD( "bas11m_1.rom", 0x14000, 0x2000, CRC(4c68ff59) SHA1(34fa37599f2f9eb607390ef2458a3c22d87f09a9) )
	ROM_LOAD( "b11m_ext.rom", 0x16000, 0x2000, CRC(b2e4c33c) SHA1(f087af69044432a1ef2431a72ac06946e32f2dd3) )
	ROM_LOAD( "b11m_bos.rom", 0x18000, 0x2000, CRC(8ffd5efa) SHA1(7e9a30e38d7b78981999821640a68a201bb6df01) )
	ROM_LOAD( "disk_327.rom", 0x1A000, 0x1000, CRC(ed8a43ae) SHA1(28eefbb63047b26e4aec104aeeca74e2f9d0276c) )
ROM_END

/* Driver */

/*    YEAR  NAME      PARENT  COMPAT  MACHINE   INPUT   CLASS     INIT        COMPANY        FULLNAME       FLAGS */
COMP( 1985, bk0010,   0,      0,      bk0010,   bk0010, bk_state, empty_init, "Elektronika", "BK 0010",     MACHINE_NOT_WORKING | MACHINE_SUPPORTS_SAVE )
COMP( 1986, bk001001, bk0010, 0,      bk0010,   bk0010, bk_state, empty_init, "Elektronika", "BK 0010-01",  MACHINE_SUPPORTS_SAVE )
COMP( 1986, bk0010fd, bk0010, 0,      bk0010fd, bk0010, bk_state, empty_init, "Elektronika", "BK 0010 FDD", MACHINE_NOT_WORKING | MACHINE_SUPPORTS_SAVE )
COMP( 1986, bk0011m,  bk0010, 0,      bk0010fd, bk0010, bk_state, empty_init, "Elektronika", "BK 0011M",    MACHINE_NOT_WORKING | MACHINE_SUPPORTS_SAVE )