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path: root/src/mame/drivers/cfx9850.cpp
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// license:BSD-3-Clause
// copyright-holders:Wilbert Pol
/***************************************************************************

    Driver for Casio CFX-9850

To operate:
The unit is switched off by default, you have to switch it on by pressing 'Q'.

Currently (year2011) it is on by default, the only key that works is '\'
which turns it off. After that nothing happens.

Debugging information:
1. g 10b3 (Initialise system)
2. cs=23
3. ip= one of these: ip=d1a4,d1af,d1ba,d1c5,d1d0,d1db,d1ea,d1f9,d208,d217,
   d226,d235,d244
4. g 23108c to get a test pattern on the screen.

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

#include "emu.h"
#include "cpu/hcd62121/hcd62121.h"
#include "rendlay.h"

class cfx9850_state : public driver_device
{
public:
	cfx9850_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
		m_video_ram(*this, "video_ram"),
		m_display_ram(*this, "display_ram"),
		m_ko_port(*this, "KO.%u", 0),
		m_maincpu(*this, "maincpu") { }

	DECLARE_WRITE8_MEMBER(kol_w);
	DECLARE_WRITE8_MEMBER(koh_w);
	DECLARE_READ8_MEMBER(ki_r);
	DECLARE_READ8_MEMBER(in0_r);
	required_shared_ptr<u8> m_video_ram;
	required_shared_ptr<u8> m_display_ram;
	u16 m_ko;  // KO lines KO1 - KO14
	DECLARE_PALETTE_INIT(cfx9850);
	u32 screen_update_cfx9850(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);

protected:
	required_ioport_array<12> m_ko_port;
	required_device<cpu_device> m_maincpu;
};


static ADDRESS_MAP_START(cfx9850, AS_PROGRAM, 8, cfx9850_state)
	AM_RANGE( 0x000000, 0x007fff ) AM_ROM
	AM_RANGE( 0x080000, 0x0807ff ) AM_RAM AM_SHARE("video_ram")
//  AM_RANGE( 0x100000, 0x10ffff ) // some memory mapped i/o?
//  AM_RANGE( 0x110000, 0x11ffff ) // some memory mapped i/o?
	AM_RANGE( 0x200000, 0x27ffff ) AM_ROM AM_REGION( "bios", 0 )
	AM_RANGE( 0x400000, 0x40ffff ) AM_RAM
	AM_RANGE( 0x600000, 0x6007ff ) AM_MIRROR(0xf800) AM_RAM AM_SHARE("display_ram")
//  AM_RANGE( 0xe10000, 0xe1ffff ) // some memory mapped i/o?
ADDRESS_MAP_END


WRITE8_MEMBER(cfx9850_state::kol_w)
{
	m_ko = (m_ko & 0xff00) | data;
}

WRITE8_MEMBER(cfx9850_state::koh_w)
{
	m_ko = (m_ko & 0x00ff) | (data << 8);
}


READ8_MEMBER(cfx9850_state::ki_r)
{
	u8 data = 0;

	for (int i = 0; i < 12; i++)
	{
		if (BIT(m_ko, i))
		{
			data |= m_ko_port[i]->read();
		}
	}

	return data;
}


READ8_MEMBER(cfx9850_state::in0_r)
{
	// battery level
	return 0x30;
}


static INPUT_PORTS_START(cfx9850)
	PORT_START("KO.0")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("AC On/Off") PORT_CODE(KEYCODE_BACKSLASH)
	PORT_BIT(0xfe, IP_ACTIVE_HIGH, IPT_UNUSED)

	PORT_START("KO.1")
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("EXE Enter") PORT_CODE(KEYCODE_ENTER)
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("(-) Ares") PORT_CODE(KEYCODE_MINUS)
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("EXP Pi") PORT_CODE(KEYCODE_EQUALS)
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME(". SPACE") PORT_CODE(KEYCODE_SPACE)
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("0   Z") PORT_CODE(KEYCODE_Z)
	PORT_BIT(0x83, IP_ACTIVE_HIGH, IPT_UNUSED)

	PORT_START("KO.2")
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("- ] Y") PORT_CODE(KEYCODE_Y)
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("+ [ X") PORT_CODE(KEYCODE_X)
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("3   W") PORT_CODE(KEYCODE_W)
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("2   V") PORT_CODE(KEYCODE_V)
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("1   U") PORT_CODE(KEYCODE_U)
	PORT_BIT(0x83, IP_ACTIVE_HIGH, IPT_UNUSED)

	PORT_START("KO.3")
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("/ } T") PORT_CODE(KEYCODE_T)
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("* { S") PORT_CODE(KEYCODE_S)
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("6   R") PORT_CODE(KEYCODE_R)
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("5   Q") PORT_CODE(KEYCODE_Q)
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("4   P") PORT_CODE(KEYCODE_P)
	PORT_BIT(0x83, IP_ACTIVE_HIGH, IPT_UNUSED)

	PORT_START("KO.4")
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("DEL DG") PORT_CODE(KEYCODE_BACKSPACE)
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("9   O") PORT_CODE(KEYCODE_O)
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("8   N") PORT_CODE(KEYCODE_N)
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("7   M") PORT_CODE(KEYCODE_M)
	PORT_BIT(0x87, IP_ACTIVE_HIGH, IPT_UNUSED)

	PORT_START("KO.5")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("TAB L") PORT_CODE(KEYCODE_L)
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME(",   K") PORT_CODE(KEYCODE_K)
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME(") x^-1 J") PORT_CODE(KEYCODE_J)
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("( .. I") PORT_CODE(KEYCODE_I)
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F<=>0 H") PORT_CODE(KEYCODE_H)
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("a b/c G") PORT_CODE(KEYCODE_G)
	PORT_BIT(0x81, IP_ACTIVE_HIGH, IPT_UNUSED)

	PORT_START("KO.6")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("tan tan^-1 F") PORT_CODE(KEYCODE_F)
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("cos cas^-1 E") PORT_CODE(KEYCODE_E)
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("sin sin^-1 D") PORT_CODE(KEYCODE_D)
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("ln e^x C") PORT_CODE(KEYCODE_C)
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("log 10^x B") PORT_CODE(KEYCODE_B)
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("x,d,t A") PORT_CODE(KEYCODE_A)
	PORT_BIT(0x81, IP_ACTIVE_HIGH, IPT_UNUSED)

	PORT_START("KO.7")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Right") PORT_CODE(KEYCODE_RIGHT)
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Down") PORT_CODE(KEYCODE_DOWN)
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("EXIT QUIT") PORT_CODE(KEYCODE_STOP)
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("/\\ .. ..") PORT_CODE(KEYCODE_COMMA)
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("x^2 sqrt ..") PORT_CODE(KEYCODE_SLASH)
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("ALPHA ..-LOCK") PORT_CODE(KEYCODE_CAPSLOCK)
	PORT_BIT(0x81, IP_ACTIVE_HIGH, IPT_UNUSED)

	PORT_START("KO.8")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Up") PORT_CODE(KEYCODE_UP)
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Left") PORT_CODE(KEYCODE_LEFT)
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("MENU SET UP") PORT_CODE(KEYCODE_OPENBRACE)
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("VARS PRGM") PORT_CODE(KEYCODE_CLOSEBRACE)
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("OPTN") PORT_CODE(KEYCODE_LCONTROL)
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("SHIFT") PORT_CODE(KEYCODE_LSHIFT)
	PORT_BIT(0x81, IP_ACTIVE_HIGH, IPT_UNUSED)

	PORT_START("KO.9")
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F6 G<=>T") PORT_CODE(KEYCODE_F6)
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F5 G-Solv") PORT_CODE(KEYCODE_F5)
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F4 Sketch") PORT_CODE(KEYCODE_F4)
	PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F3 V-Window") PORT_CODE(KEYCODE_F3)
	PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F2 Zoom") PORT_CODE(KEYCODE_F2)
	PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F1 Trace") PORT_CODE(KEYCODE_F1)
	PORT_BIT(0x81, IP_ACTIVE_HIGH, IPT_UNUSED)

	// KO11 is not connected
	PORT_START("KO.10")
	PORT_BIT(0xff, IP_ACTIVE_HIGH, IPT_UNUSED)

	PORT_START("KO.11")
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("TEST") PORT_CODE(KEYCODE_TILDE)
	PORT_BIT(0xf7, IP_ACTIVE_HIGH, IPT_UNUSED)
INPUT_PORTS_END


PALETTE_INIT_MEMBER(cfx9850_state, cfx9850)
{
	palette.set_pen_color(0, 0xff, 0xff, 0xff);
	palette.set_pen_color(1, 0x00, 0x00, 0xff);
	palette.set_pen_color(2, 0x00, 0xff, 0x00);
	palette.set_pen_color(3, 0xff, 0x00, 0x00);
}


u32 cfx9850_state::screen_update_cfx9850(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
	u16 offset = 0;

	for (int i = 0; i < 16; i++)
	{
		int x = 120 - i * 8;

		for (int j = 0; j < 64; j++)
		{
			u8 data1 = m_display_ram[offset];
			u8 data2 = m_display_ram[offset + 0x400];

			for (int b = 0; b < 8; b++)
			{
				bitmap.pix16(63-j, x+b) = ( data1 & 0x80 ) ? ( data2 & 0x80 ? 3 : 2 ) : ( data2 & 0x80 ? 1 : 0 );
				data1 <<= 1;
				data2 <<= 1;
			}

			offset++;
		}
	}

	return 0;
}


static MACHINE_CONFIG_START(cfx9850, cfx9850_state)
	MCFG_CPU_ADD("maincpu", HCD62121, 4300000)    /* 4.3 MHz */
	MCFG_CPU_PROGRAM_MAP(cfx9850)
	MCFG_HCD62121_KOL_CB(WRITE8(cfx9850_state, kol_w))
	MCFG_HCD62121_KOH_CB(WRITE8(cfx9850_state, koh_w))
	MCFG_HCD62121_KI_CB(READ8(cfx9850_state, ki_r))
	MCFG_HCD62121_IN0_CB(READ8(cfx9850_state, in0_r))

	MCFG_SCREEN_ADD("screen", LCD)
	MCFG_SCREEN_REFRESH_RATE(60)
	MCFG_SCREEN_SIZE(128, 64)
	MCFG_SCREEN_VISIBLE_AREA(0, 127, 0, 63)
	MCFG_SCREEN_UPDATE_DRIVER(cfx9850_state, screen_update_cfx9850)
	MCFG_SCREEN_PALETTE("palette")

	MCFG_DEFAULT_LAYOUT(layout_lcd)

	// TODO: Verify amount of colors and palette
	MCFG_PALETTE_ADD("palette", 4)
	MCFG_PALETTE_INIT_OWNER(cfx9850_state, cfx9850)
MACHINE_CONFIG_END


ROM_START(cfx9850)
	ROM_REGION(0x8000, "maincpu", 0)
	ROM_LOAD("hcd62121.bin", 0x0000, 0x8000, CRC(e72075f8) SHA1(f50d176e1c225dab69abfc67702c9dfb296b6a78))

	ROM_REGION(0x80000, "bios", 0)
	// Unknown yet which rom is which version.
	ROM_SYSTEM_BIOS(0, "rom1", "rom1, version unknown")
	ROMX_LOAD("cfx9850.bin", 0x00000, 0x80000, CRC(6c9bd903) SHA1(d5b6677ab4e0d3f84e5769e89e8f3d101f98f848), ROM_BIOS(1))
	ROM_SYSTEM_BIOS(1, "rom2", "rom2, version unknown")
	ROMX_LOAD("cfx9850b.bin", 0x00000, 0x80000, CRC(cd3c497f) SHA1(1d1aa38205eec7aba3ed6bef7389767e38afe075), ROM_BIOS(2))
ROM_END


COMP(1996, cfx9850, 0, 0, cfx9850, cfx9850, driver_device, 0, "Casio", "CFX-9850G", MACHINE_NO_SOUND | MACHINE_NOT_WORKING)