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path: root/src/mame/drivers/mc8030.cpp
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// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic
/***************************************************************************

MC-80.3x driver by Miodrag Milanovic

2009-05-12 Skeleton driver.
2009-05-15 Initial implementation
2011-09-01 Modernised

mc80.3x: http://www.ycdt.net/mc80.3x/

mc8030: very little info available. The area from FFD8-FFFF is meant for
interrupt vectors and so on, but most of it is zeroes. Appears the keyboard
is an ascii keyboard with built-in beeper. It communicates via the SIO.
The asp ctc needs at least 2 triggers. The purpose of the zve pio is unknown.

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

#include "emu.h"
#include "cpu/z80/z80.h"
#include "machine/z80daisy.h"
#include "emupal.h"
#include "screen.h"
#include "machine/clock.h"
#include "bus/rs232/rs232.h"
#include "machine/z80ctc.h"
#include "machine/z80pio.h"
#include "machine/z80sio.h"


class mc8030_state : public driver_device
{
public:
	mc8030_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag)
		, m_p_videoram(*this, "vram")
		, m_maincpu(*this, "maincpu")
	{ }

	void mc8030(machine_config &config);

private:
	DECLARE_WRITE8_MEMBER(zve_write_protect_w);
	DECLARE_WRITE8_MEMBER(vis_w);
	DECLARE_WRITE8_MEMBER(eprom_prog_w);
	DECLARE_READ8_MEMBER(zve_port_a_r);
	DECLARE_READ8_MEMBER(zve_port_b_r);
	DECLARE_WRITE8_MEMBER(zve_port_a_w);
	DECLARE_WRITE8_MEMBER(zve_port_b_w);
	DECLARE_READ8_MEMBER(asp_port_a_r);
	DECLARE_READ8_MEMBER(asp_port_b_r);
	DECLARE_WRITE8_MEMBER(asp_port_a_w);
	DECLARE_WRITE8_MEMBER(asp_port_b_w);
	uint32_t screen_update_mc8030(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);

	void io_map(address_map &map);
	void mem_map(address_map &map);

	required_region_ptr<u8> m_p_videoram;
	required_device<cpu_device> m_maincpu;
};


void mc8030_state::mem_map(address_map &map)
{
	map.unmap_value_high();
	//  ZRE 4 * 2KB
	map(0x0000, 0x1fff).rom(); // ZRE ROM's 4 * 2716
	map(0x2000, 0x27ff).rom(); // SPE ROM's 2 * 2708
	map(0x2800, 0x3fff).rom(); // For extension
	map(0x4000, 0xbfff).ram(); // SPE RAM
	map(0xc000, 0xffff).ram(); // ZRE RAM
}

void mc8030_state::io_map(address_map &map)
{
	map.unmap_value_high();
	map(0x30, 0x3f).mirror(0xff00).noprw(); //"mass storage"
	map(0x80, 0x83).mirror(0xff00).rw("zve_ctc", FUNC(z80ctc_device::read), FUNC(z80ctc_device::write)); // user CTC
	map(0x84, 0x87).mirror(0xff00).rw("zve_pio", FUNC(z80pio_device::read), FUNC(z80pio_device::write)); // PIO unknown usage
	map(0x88, 0x8f).mirror(0xff00).w(FUNC(mc8030_state::zve_write_protect_w));
	map(0xc0, 0xcf).select(0xff00).w(FUNC(mc8030_state::vis_w));
	map(0xd0, 0xd3).mirror(0xff00).rw("asp_sio", FUNC(z80sio_device::ba_cd_r), FUNC(z80sio_device::ba_cd_w)); // keyboard & IFSS?
	map(0xd4, 0xd7).mirror(0xff00).rw("asp_ctc", FUNC(z80ctc_device::read), FUNC(z80ctc_device::write)); // sio bauds, KMBG? and kbd
	map(0xd8, 0xdb).mirror(0xff00).rw("asp_pio", FUNC(z80pio_device::read), FUNC(z80pio_device::write)); // external bus
	map(0xe0, 0xef).mirror(0xff00).w(FUNC(mc8030_state::eprom_prog_w));
}

/* Input ports */
static INPUT_PORTS_START( mc8030 )
INPUT_PORTS_END


WRITE8_MEMBER( mc8030_state::zve_write_protect_w )
{
}

WRITE8_MEMBER( mc8030_state::vis_w )
{
	// reg C
	// 7 6 5 4 -- module
	//         3 - 0 left half, 1 right half
	//           2 1 0
	//           =====
	//           0 0 0 - dark
	//           0 0 1 - light
	//           0 1 0 - in reg pixel
	//           0 1 1 - negate in reg pixel
	//           1 0 x - operation code in B reg
	// reg B
	//
	uint16_t addr = ((offset & 0xff00) >> 2) | ((offset & 0x08) << 2) | (data >> 3);
	u8 c = 1 << (data & 7);
	if (BIT(offset, 0))
		m_p_videoram[addr] |= c;
	else
		m_p_videoram[addr] &= ~c;
}

WRITE8_MEMBER( mc8030_state::eprom_prog_w )
{
}

READ8_MEMBER( mc8030_state::zve_port_a_r )
{
	return 0xff;
}

READ8_MEMBER( mc8030_state::zve_port_b_r )
{
	return 0xff;
}

READ8_MEMBER( mc8030_state::asp_port_a_r )
{
	return 0xff;
}

READ8_MEMBER( mc8030_state::asp_port_b_r )
{
	return 0xff;
}


uint32_t mc8030_state::screen_update_mc8030(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
	uint8_t gfx;
	uint16_t y=0,ma=0,x;

	for(y = 0; y < 256; y++ )
	{
		uint16_t *p = &bitmap.pix16(y);
		{
			for (x = ma; x < ma + 64; x++)
			{
				gfx = m_p_videoram[x^0x3fff];

				/* Display a scanline of a character */
				*p++ = BIT(gfx, 7);
				*p++ = BIT(gfx, 6);
				*p++ = BIT(gfx, 5);
				*p++ = BIT(gfx, 4);
				*p++ = BIT(gfx, 3);
				*p++ = BIT(gfx, 2);
				*p++ = BIT(gfx, 1);
				*p++ = BIT(gfx, 0);
			}
		}
		ma+=64;
	}
	return 0;
}

// this is a guess there is no information available
static const z80_daisy_config daisy_chain[] =
{
	{ "asp_ctc" },      /* System ctc */
	{ "asp_pio" },      /* System pio */
	{ "asp_sio" },      /* sio */
	{ "zve_pio" },      /* User pio */
	{ "zve_ctc" },      /* User ctc */
	{ nullptr }
};


MACHINE_CONFIG_START(mc8030_state::mc8030)
	/* basic machine hardware */
	MCFG_DEVICE_ADD("maincpu",Z80, XTAL(2'457'600))
	MCFG_DEVICE_PROGRAM_MAP(mem_map)
	MCFG_DEVICE_IO_MAP(io_map)
	MCFG_Z80_DAISY_CHAIN(daisy_chain)

	/* 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(512, 256)
	MCFG_SCREEN_VISIBLE_AREA(0, 512-1, 0, 256-1)
	MCFG_SCREEN_UPDATE_DRIVER(mc8030_state, screen_update_mc8030)
	MCFG_SCREEN_PALETTE("palette")

	MCFG_PALETTE_ADD_MONOCHROME("palette")

	/* Devices */
	MCFG_DEVICE_ADD("zve_pio", Z80PIO, XTAL(2'457'600))
	MCFG_Z80PIO_OUT_INT_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0))
	MCFG_Z80PIO_IN_PA_CB(READ8(*this, mc8030_state, zve_port_a_r))
	//MCFG_Z80PIO_OUT_PA_CB(WRITE8(*this, mc8030_state, zve_port_a_w))
	MCFG_Z80PIO_IN_PB_CB(READ8(*this, mc8030_state, zve_port_b_r))
	//MCFG_Z80PIO_OUT_PB_CB(WRITE8(*this, mc8030_state, zve_port_b_w))

	MCFG_DEVICE_ADD("zve_ctc", Z80CTC, XTAL(2'457'600))
	MCFG_Z80CTC_INTR_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0))
	// ZC0, ZC1, ZC2 for user

	MCFG_DEVICE_ADD("asp_pio", Z80PIO, XTAL(2'457'600))
	MCFG_Z80PIO_OUT_INT_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0))
	MCFG_Z80PIO_IN_PA_CB(READ8(*this, mc8030_state, asp_port_a_r))
	//MCFG_Z80PIO_OUT_PA_CB(WRITE8(*this, mc8030_state, asp_port_a_w))
	MCFG_Z80PIO_IN_PB_CB(READ8(*this, mc8030_state, asp_port_b_r))
	//MCFG_Z80PIO_OUT_PB_CB(WRITE8(*this, mc8030_state, asp_port_b_w))

	MCFG_DEVICE_ADD("asp_ctc", Z80CTC, XTAL(2'457'600))
	MCFG_Z80CTC_INTR_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0))
	// ZC0: to SIO CLK CH A
	// ZC1: to SIO CLK CH B
	// ZC2: KMBG (??)

	MCFG_DEVICE_ADD("uart_clock", CLOCK, 153600)
	MCFG_CLOCK_SIGNAL_HANDLER(WRITELINE("asp_sio", z80sio_device, txca_w))
	MCFG_DEVCB_CHAIN_OUTPUT(WRITELINE("asp_sio", z80sio_device, rxca_w))

	MCFG_DEVICE_ADD("asp_sio", Z80SIO, 4800)
	MCFG_Z80SIO_OUT_INT_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0))
	// SIO CH A in = keyboard; out = beeper; CH B = IFSS (??)
	MCFG_Z80SIO_OUT_TXDA_CB(WRITELINE("rs232", rs232_port_device, write_txd))
	MCFG_Z80SIO_OUT_DTRA_CB(WRITELINE("rs232", rs232_port_device, write_dtr))
	MCFG_Z80SIO_OUT_RTSA_CB(WRITELINE("rs232", rs232_port_device, write_rts))

	MCFG_DEVICE_ADD("rs232", RS232_PORT, default_rs232_devices, "keyboard")
	MCFG_RS232_RXD_HANDLER(WRITELINE("asp_sio", z80sio_device, rxa_w))
	MCFG_RS232_CTS_HANDLER(WRITELINE("asp_sio", z80sio_device, ctsa_w))
MACHINE_CONFIG_END

/* ROM definition */
ROM_START( mc8030 )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
	ROM_LOAD( "zve_1.rom", 0x0000, 0x0800, CRC(31ec0159) SHA1(a97ea9eb733c462e77d625a7942134e45d911c0a))
	ROM_LOAD( "zve_2.rom", 0x0800, 0x0800, CRC(5104983d) SHA1(7516274904042f4fc6813aa8b2a75c0a64f9b937))
	ROM_LOAD( "zve_3.rom", 0x1000, 0x0800, CRC(4bcfd727) SHA1(d296e587098e70270ad60db8edaa685af368b849))
	ROM_LOAD( "zve_4.rom", 0x1800, 0x0800, CRC(f949ae43) SHA1(68c324cf5578497db7ae65da5695fcb30493f612))
	ROM_LOAD( "spe_1.rom", 0x2000, 0x0400, CRC(826f609c) SHA1(e77ff6c180f5a6d7756d076173ae264a0e26f066))
	ROM_LOAD( "spe_2.rom", 0x2400, 0x0400, CRC(98320040) SHA1(6baf87e196f1ccdf44912deafa6042becbfb0679))

	ROM_REGION( 0x4000, "vram", ROMREGION_ERASE00 )

	ROM_REGION( 0x4000, "user1", 0 )
	// marked as "80.3x"
	ROM_LOAD( "mc80.3-x-2c00-c63c.bin", 0x2c00, 0x0400, CRC(469be754) SHA1(a7fea257a1c0970349f75504c0870a2649b50303) )
	ROM_LOAD( "mc80.3-ccd-3000-f10a.bin", 0x3000, 0x0400, CRC(7d220128) SHA1(bb6070c9d460ec7ea1a1b46b19ca9520d55e127c) ) // 80.3x ccd test system
	ROM_LOAD( "mc80.3-x-3800-7280.bin", 0x3800, 0x0400, CRC(09976efb) SHA1(1a708adbf1cd68d450a9bfccafe1f82e755e5885) )
	// marked as "80.3x rk"
	ROM_LOAD( "mc80.3-rk-3000-5642.bin", 0x3000, 0x0400, CRC(280b2211) SHA1(d2c05ff7f7ea534776bf7e92263f1c10192e5385) )
	ROM_LOAD( "mc80.3-rk-3400-c6a7.bin", 0x3400, 0x0400, CRC(fc5656f3) SHA1(0ad5abb6536665719693063bf8da2993238c84dd) )
	ROM_LOAD( "mc80.3-rk-3800-1678.bin", 0x3800, 0x0400, CRC(34d7e1cf) SHA1(14d3e49f34e0c2a95967613538b33a671998e7a8) )
	// marked as "80.30e v1"
	ROM_LOAD( "mc80.30e-0000.bin", 0x0000, 0x0800, CRC(ebdf766f) SHA1(d06f1e4467104f59554168d17cd15b98d107375e) )
	// marked as "80.30e v2"
	ROM_LOAD( "mc80.30e-0000v2.bin", 0x0000, 0x0800, CRC(259b55e9) SHA1(6e8fd84f1b225f33bc0fd30ecc6e30b8063eaeed) )
	ROM_LOAD( "mc80.30e-0800v2.bin", 0x0800, 0x0800, CRC(fe7a01a7) SHA1(6531cde5b9dea2a15a813598937aa3d9540a8066) )
	// marked as "80.31e"
	ROM_LOAD( "mc80.31e-2400-d0d7.bin", 0x2400, 0x0400, CRC(43c22046) SHA1(a179fe83b5cbbbc5f92a4b2ef1012099ccb333d9) )
	ROM_LOAD( "mc80.31e-3000-0d15.bin", 0x3000, 0x0400, CRC(cf6f090b) SHA1(0bc352ca42f41cfe7e28052c099dcd020b776dd5) )
	ROM_LOAD( "mc80.31e-3400-9993.bin", 0x3400, 0x0400, CRC(918d2b55) SHA1(b6dec17e996c464cf189a699d24d270494540b49) )
	ROM_LOAD( "mc80.31e-3800-7a4c.bin", 0x3800, 0x0400, CRC(62d9f989) SHA1(a20b731daed51270d86f486751302055eb93dd1c) )
	// marked as "80.31e?"
	ROM_LOAD( "mc80.3s-2000.bin", 0x2000, 0x0400, CRC(28f1df56) SHA1(9752c9eab3d9f72c23b5f5618a5db1a038953e29) )
	ROM_LOAD( "mc80.3s-2400.bin", 0x2400, 0x0400, CRC(43c22046) SHA1(a179fe83b5cbbbc5f92a4b2ef1012099ccb333d9) )
	ROM_LOAD( "mc80.3s-2800.bin", 0x2800, 0x0400, CRC(4b52deb1) SHA1(f8a9ddb4363f8389990fd263985e882a73265c5d) )
	ROM_LOAD( "mc80.3s-2c00.bin", 0x2c00, 0x0400, CRC(a13d8302) SHA1(1fcdcd6b7af8ef4b18a0658a1a50d0db26b7f214) )
	ROM_LOAD( "mc80.3s-3000.bin", 0x3000, 0x0400, CRC(cf6f090b) SHA1(0bc352ca42f41cfe7e28052c099dcd020b776dd5) )
	ROM_LOAD( "mc80.3s-3400.bin", 0x3400, 0x0400, CRC(918d2b55) SHA1(b6dec17e996c464cf189a699d24d270494540b49) )
	ROM_LOAD( "mc80.3s-3800.bin", 0x3800, 0x0400, CRC(6104646b) SHA1(630f7c57e928db0eb4070139a66f2d313a6314b4) )
	ROM_LOAD( "mc80.3s-3c00.bin", 0x3c00, 0x0400, CRC(2f82d032) SHA1(fe8f642b94a0ba8852ec56d8cbb7a52bb7e5d55a) )
	// marked as "80.33 original"
	ROM_LOAD( "mc80.33-1000.bin", 0x1000, 0x0800, CRC(c7e062b1) SHA1(81b999655b32d9b39287a08896a274278a2f739c) )
	// random set, zve_1 - 4 same as main set
	ROM_LOAD( "spe_1a.rom",    0x2000, 0x000800, CRC(37c71c68) SHA1(951650698b00f65facf5ccfbd8dd13628a93425d) )
	ROM_LOAD( "spe_2a.rom",    0x2800, 0x000400, CRC(9ec8f287) SHA1(cdf5a9583d898814ba480ffbc8d906a642c6dc81) )
ROM_END

/* Driver */

//    YEAR  NAME    PARENT  COMPAT  MACHINE  INPUT   CLASS         INIT        COMPANY                FULLNAME       FLAGS
COMP( 198?, mc8030, 0,      0,      mc8030,  mc8030, mc8030_state, empty_init, "VEB Elektronik Gera", "MC-80.30/31", MACHINE_NOT_WORKING | MACHINE_NO_SOUND | ORIENTATION_FLIP_X )