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path: root/src/mame/drivers/peoplepc.cpp
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// license:BSD-3-Clause
// copyright-holders:Carl

#include "emu.h"
#include "cpu/i86/i86.h"
#include "machine/pic8259.h"
#include "machine/pit8253.h"
#include "machine/i8255.h"
#include "machine/i8251.h"
#include "machine/i8257.h"
#include "machine/upd765.h"
#include "video/mc6845.h"
#include "bus/rs232/rs232.h"
#include "bus/rs232/keyboard.h"
#include "screen.h"

class peoplepc_state : public driver_device
{
public:
	peoplepc_state(const machine_config &mconfig, device_type type, const char *tag) :
		driver_device(mconfig, type, tag),
		m_maincpu(*this, "maincpu"),
		m_palette(*this, "palette"),
		m_pic_1(*this, "pic8259_1"),
		m_8251key(*this, "i8251_0"),
		m_8251ser(*this, "i8251_1"),
		m_fdc(*this, "upd765"),
		m_flop0(*this, "upd765:0"),
		m_flop1(*this, "upd765:1"),
		m_dmac(*this, "i8257"),
		m_gfxdecode(*this, "gfxdecode"),
		m_gvram(*this, "gvram"),
		m_cvram(*this, "cvram"),
		m_charram(4*1024)
	{ }
	required_device<cpu_device> m_maincpu;
	required_device<palette_device> m_palette;
	required_device<pic8259_device> m_pic_1;
	required_device<i8251_device> m_8251key;
	required_device<i8251_device> m_8251ser;
	required_device<upd765a_device> m_fdc;
	required_device<floppy_connector> m_flop0;
	required_device<floppy_connector> m_flop1;
	required_device<i8257_device> m_dmac;
	required_device<gfxdecode_device> m_gfxdecode;
	required_shared_ptr<uint16_t> m_gvram;
	required_shared_ptr<uint16_t> m_cvram;
	std::vector<uint8_t> m_charram;

	MC6845_UPDATE_ROW(update_row);
	DECLARE_READ8_MEMBER(get_slave_ack);
	DECLARE_WRITE16_MEMBER(charram_w);
	DECLARE_WRITE_LINE_MEMBER(tty_clock_tick_w);
	DECLARE_WRITE_LINE_MEMBER(kbd_clock_tick_w);
	DECLARE_WRITE8_MEMBER(dmapg_w);
	DECLARE_WRITE_LINE_MEMBER(tc_w);
	DECLARE_WRITE_LINE_MEMBER(hrq_w);
	DECLARE_READ8_MEMBER(memory_read_byte);
	DECLARE_WRITE8_MEMBER(memory_write_byte);
	DECLARE_FLOPPY_FORMATS( floppy_formats );
	image_init_result floppy_load(floppy_image_device *dev);
	void floppy_unload(floppy_image_device *dev);

	uint8_t m_dma0pg;
	void olypeopl(machine_config &config);
	void peoplepc_io(address_map &map);
	void peoplepc_map(address_map &map);
protected:
	virtual void machine_start() override;
	virtual void machine_reset() override;
};

static const gfx_layout peoplepc_charlayout =
{
	8, 19,                   /* 8 x 19 characters */
	128,                    /* 128 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, 12*8, 13*8, 14*8, 15*8, 16*8, 17*8, 18*8 },
	8*32
};

MC6845_UPDATE_ROW(peoplepc_state::update_row)
{
	const rgb_t *palette = m_palette->palette()->entry_list_raw();
	int i, j;

	for(i = 0; i < x_count; i++)
	{
		if(0)
		{
			uint16_t offset = ((ma | (ra << 1)) << 4) + i;
			uint8_t data = m_gvram[offset] >> (offset & 1 ? 8 : 0);

			for(j = 8; j >= 0; j--)
				bitmap.pix32(y, (i * 8) + j) = palette[( data & 1 << j ) ? 1 : 0];
		}
		else
		{
			uint8_t data = m_charram[(m_cvram[(ma + i) & 0x3fff] & 0x7f) * 32 + ra];
			for(j = 0; j < 8; j++)
				bitmap.pix32(y, (i * 8) + j) = palette[(data & (1 << j)) ? 1 : 0];
		}
	}
}

READ8_MEMBER(peoplepc_state::get_slave_ack)
{
	if (offset == 7)
		return m_pic_1->acknowledge();

	return 0x00;
}

WRITE16_MEMBER(peoplepc_state::charram_w)
{
	m_charram[offset] = data;
	m_gfxdecode->gfx(0)->mark_dirty(offset/16);
}

WRITE_LINE_MEMBER(peoplepc_state::tty_clock_tick_w)
{
	m_8251ser->write_txc(state);
	m_8251ser->write_rxc(state);
}

WRITE_LINE_MEMBER(peoplepc_state::kbd_clock_tick_w)
{
	m_8251key->write_txc(state);
	m_8251key->write_rxc(state);
}

WRITE8_MEMBER(peoplepc_state::dmapg_w)
{
	m_dma0pg = data;
}

WRITE_LINE_MEMBER(peoplepc_state::tc_w)
{
	m_fdc->tc_w(state);
}

WRITE_LINE_MEMBER(peoplepc_state::hrq_w)
{
	m_maincpu->set_input_line(INPUT_LINE_HALT, state);
	m_dmac->hlda_w(state);
}

READ8_MEMBER(peoplepc_state::memory_read_byte)
{
	address_space& prog_space = m_maincpu->space(AS_PROGRAM);
	return prog_space.read_byte(offset | (m_dma0pg << 16));
}

WRITE8_MEMBER(peoplepc_state::memory_write_byte)
{
	address_space& prog_space = m_maincpu->space(AS_PROGRAM);
	prog_space.write_byte(offset | (m_dma0pg << 16), data);
}

image_init_result peoplepc_state::floppy_load(floppy_image_device *dev)
{
	dev->mon_w(0);
	return image_init_result::PASS;
}

void peoplepc_state::floppy_unload(floppy_image_device *dev)
{
	dev->mon_w(1);
}

void peoplepc_state::machine_reset()
{
	m_flop0->get_device()->mon_w(!m_flop0->get_device()->exists());
	m_flop1->get_device()->mon_w(!m_flop1->get_device()->exists());
}

void peoplepc_state::machine_start()
{
	m_gfxdecode->set_gfx(0, std::make_unique<gfx_element>(m_palette, peoplepc_charlayout, &m_charram[0], 0, 1, 0));
	m_dma0pg = 0;

	// FIXME: cheat as there no docs about how or obvious ports that set to control the motor
	m_flop0->get_device()->setup_load_cb(floppy_image_device::load_cb(&peoplepc_state::floppy_load, this));
	m_flop0->get_device()->setup_unload_cb(floppy_image_device::unload_cb(&peoplepc_state::floppy_unload, this));
	m_flop1->get_device()->setup_load_cb(floppy_image_device::load_cb(&peoplepc_state::floppy_load, this));
	m_flop1->get_device()->setup_unload_cb(floppy_image_device::unload_cb(&peoplepc_state::floppy_unload, this));
}

void peoplepc_state::peoplepc_map(address_map &map)
{
	map.unmap_value_high();
	map(0x00000, 0x7ffff).ram();
	map(0xc0000, 0xdffff).ram().share("gvram");
	map(0xe0000, 0xe3fff).ram().share("cvram");
	map(0xe4000, 0xe5fff).w(this, FUNC(peoplepc_state::charram_w));
	map(0xfe000, 0xfffff).rom().region("maincpu", 0);
}

void peoplepc_state::peoplepc_io(address_map &map)
{
	map.unmap_value_high();
	map(0x0014, 0x0017).rw(m_pic_1, FUNC(pic8259_device::read), FUNC(pic8259_device::write)).umask16(0x00ff);
	map(0x0018, 0x001b).rw("pic8259_0", FUNC(pic8259_device::read), FUNC(pic8259_device::write)).umask16(0x00ff);
	map(0x0020, 0x0031).rw(m_dmac, FUNC(i8257_device::read), FUNC(i8257_device::write)).umask16(0x00ff);
	map(0x0040, 0x0047).rw("ppi8255", FUNC(i8255_device::read), FUNC(i8255_device::write)).umask16(0x00ff);
	map(0x0048, 0x004f).rw("pit8253", FUNC(pit8253_device::read), FUNC(pit8253_device::write)).umask16(0x00ff);
	map(0x0054, 0x0054).rw(m_8251key, FUNC(i8251_device::data_r), FUNC(i8251_device::data_w));
	map(0x0056, 0x0056).rw(m_8251key, FUNC(i8251_device::status_r), FUNC(i8251_device::control_w));
	map(0x005c, 0x005c).rw(m_8251ser, FUNC(i8251_device::data_r), FUNC(i8251_device::data_w));
	map(0x005e, 0x005e).rw(m_8251ser, FUNC(i8251_device::status_r), FUNC(i8251_device::control_w));
	map(0x0064, 0x0067).m(m_fdc, FUNC(upd765a_device::map)).umask16(0x00ff);
	map(0x006c, 0x006c).w("h46505", FUNC(mc6845_device::address_w));
	map(0x006e, 0x006e).rw("h46505", FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w));
	map(0x0070, 0x0070).w(this, FUNC(peoplepc_state::dmapg_w));
}

static void peoplepc_floppies(device_slot_interface &device)
{
	device.option_add("525qd", FLOPPY_525_QD);
}

FLOPPY_FORMATS_MEMBER( peoplepc_state::floppy_formats )
	FLOPPY_IMD_FORMAT
FLOPPY_FORMATS_END

void peoplepc_keyboard_devices(device_slot_interface &device)
{
	device.option_add("keyboard", SERIAL_KEYBOARD);
}

static DEVICE_INPUT_DEFAULTS_START(keyboard)
	DEVICE_INPUT_DEFAULTS( "RS232_TXBAUD", 0xff, RS232_BAUD_1200 )
	DEVICE_INPUT_DEFAULTS( "RS232_STARTBITS", 0xff, RS232_STARTBITS_1 )
	DEVICE_INPUT_DEFAULTS( "RS232_DATABITS", 0xff, RS232_DATABITS_8 )
	DEVICE_INPUT_DEFAULTS( "RS232_PARITY", 0xff, RS232_PARITY_EVEN )
	DEVICE_INPUT_DEFAULTS( "RS232_STOPBITS", 0xff, RS232_STOPBITS_1 )
DEVICE_INPUT_DEFAULTS_END

MACHINE_CONFIG_START(peoplepc_state::olypeopl)
	/* basic machine hardware */
	MCFG_DEVICE_ADD("maincpu", I8086, XTAL(14'745'600)/3)
	MCFG_DEVICE_PROGRAM_MAP(peoplepc_map)
	MCFG_DEVICE_IO_MAP(peoplepc_io)
	MCFG_DEVICE_IRQ_ACKNOWLEDGE_DEVICE("pic8259_0", pic8259_device, inta_cb)

	MCFG_DEVICE_ADD("pit8253", PIT8253, 0)
	MCFG_PIT8253_CLK0(XTAL(14'745'600)/6)
	MCFG_PIT8253_OUT0_HANDLER(WRITELINE(*this, peoplepc_state, kbd_clock_tick_w))
	MCFG_PIT8253_CLK1(XTAL(14'745'600)/6)
	MCFG_PIT8253_OUT1_HANDLER(WRITELINE(*this, peoplepc_state, tty_clock_tick_w))
	MCFG_PIT8253_CLK2(XTAL(14'745'600)/6)
	MCFG_PIT8253_OUT2_HANDLER(WRITELINE("pic8259_0", pic8259_device, ir0_w))

	MCFG_DEVICE_ADD("pic8259_0", PIC8259, 0)
	MCFG_PIC8259_OUT_INT_CB(INPUTLINE("maincpu", 0))
	MCFG_PIC8259_IN_SP_CB(VCC)
	MCFG_PIC8259_CASCADE_ACK_CB(READ8(*this, peoplepc_state, get_slave_ack))

	MCFG_DEVICE_ADD("pic8259_1", PIC8259, 0)
	MCFG_PIC8259_OUT_INT_CB(WRITELINE("pic8259_0", pic8259_device, ir7_w))
	MCFG_PIC8259_IN_SP_CB(GND)

	MCFG_DEVICE_ADD("ppi8255", I8255, 0)

	MCFG_SCREEN_ADD_MONOCHROME("screen", RASTER, rgb_t::green())
	MCFG_SCREEN_RAW_PARAMS(XTAL(22'000'000),640,0,640,475,0,475)
	MCFG_SCREEN_UPDATE_DEVICE( "h46505", mc6845_device, screen_update )

	MCFG_DEVICE_ADD("gfxdecode", GFXDECODE, "palette", gfxdecode_device::empty)
	MCFG_PALETTE_ADD_MONOCHROME("palette")

	MCFG_MC6845_ADD("h46505", H46505, "screen", XTAL(22'000'000)/8)
	MCFG_MC6845_SHOW_BORDER_AREA(false)
	MCFG_MC6845_CHAR_WIDTH(8)
	MCFG_MC6845_UPDATE_ROW_CB(peoplepc_state, update_row)

	MCFG_DEVICE_ADD("i8257", I8257, XTAL(14'745'600)/3)
	MCFG_I8257_OUT_HRQ_CB(WRITELINE(*this, peoplepc_state, hrq_w))
	MCFG_I8257_OUT_TC_CB(WRITELINE(*this, peoplepc_state, tc_w))
	MCFG_I8257_IN_MEMR_CB(READ8(*this, peoplepc_state, memory_read_byte))
	MCFG_I8257_OUT_MEMW_CB(WRITE8(*this, peoplepc_state, memory_write_byte))
	MCFG_I8257_IN_IOR_0_CB(READ8("upd765", upd765a_device, mdma_r))
	MCFG_I8257_OUT_IOW_0_CB(WRITE8("upd765", upd765a_device, mdma_w))

	MCFG_UPD765A_ADD("upd765", true, true)
	MCFG_UPD765_INTRQ_CALLBACK(WRITELINE("pic8259_0", pic8259_device, ir2_w))
	MCFG_UPD765_DRQ_CALLBACK(WRITELINE("i8257", i8257_device, dreq0_w))
	MCFG_FLOPPY_DRIVE_ADD("upd765:0", peoplepc_floppies, "525qd", peoplepc_state::floppy_formats)
	MCFG_FLOPPY_DRIVE_ADD("upd765:1", peoplepc_floppies, "525qd", peoplepc_state::floppy_formats)

	MCFG_DEVICE_ADD("i8251_0", I8251, 0)
	MCFG_I8251_RXRDY_HANDLER(WRITELINE("pic8259_1", pic8259_device, ir1_w))
	MCFG_I8251_TXD_HANDLER(WRITELINE("kbd", rs232_port_device, write_txd))

	MCFG_DEVICE_ADD("kbd", RS232_PORT, peoplepc_keyboard_devices, "keyboard")
	MCFG_RS232_RXD_HANDLER(WRITELINE("i8251_0", i8251_device, write_rxd))
	MCFG_SLOT_OPTION_DEVICE_INPUT_DEFAULTS("keyboard", keyboard)

	MCFG_DEVICE_ADD("i8251_1", I8251, 0)
MACHINE_CONFIG_END

ROM_START( olypeopl )
	ROM_REGION(0x2000,"maincpu", 0)
	ROM_SYSTEM_BIOS(0, "hd",  "HD ROM")
	ROMX_LOAD( "u01271c0.bin", 0x00000, 0x1000, CRC(8e0ef114) SHA1(774bab0a3e29853e9f6b951cf73082063ea61e6d), ROM_SKIP(1)|ROM_BIOS(1))
	ROMX_LOAD( "u01271d0.bin", 0x00001, 0x1000, CRC(e2419bf9) SHA1(d88381f8709c91e2adba08f378e29bd0d19ee5ae), ROM_SKIP(1)|ROM_BIOS(1))
	ROM_SYSTEM_BIOS(1, "2fd",  "2 FD ROM")
	ROMX_LOAD( "u01277f3.bin", 0x00000, 0x1000, CRC(428ff135) SHA1(ec11f0e43455570c40f5dc4b84f8420da5939368), ROM_SKIP(1)|ROM_BIOS(2))
	ROMX_LOAD( "u01277g3.bin", 0x00001, 0x1000, CRC(3295691c) SHA1(7d7ade62117d11656b8dd86cf0703127616d55bc), ROM_SKIP(1)|ROM_BIOS(2))
ROM_END

COMP( 198?, olypeopl, 0, 0, olypeopl, 0, peoplepc_state, empty_init, "Olympia", "People PC", MACHINE_NOT_WORKING|MACHINE_NO_SOUND)