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microb.cpp
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microb.cpp
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// license:BSD-3-Clause
// copyright-holders:Robbbert, AJR
/***************************************************************************
BEEHIVE Micro B Series
2009-05-25 Skeleton driver [Robbbert]
2011-04-25 Added partial keyboard.
2011-06-26 Added modifier keys.
This is a series of conventional computer terminals using a serial link.
DM3270 is a clone of the IBM3276-2.
The character gen rom is not dumped. Using the one from 'c10'
for the moment.
System beeps if ^G or ^Z pressed. Pressing ^Q is the same as Enter.
****************************************************************************/
#include "emu.h"
#include "cpu/i8085/i8085.h"
#include "machine/input_merger.h"
#include "machine/i8251.h"
#include "machine/i8255.h"
#include "machine/i8257.h"
#include "machine/pit8253.h"
#include "video/i8275.h"
#include "bus/rs232/rs232.h"
#include "sound/beep.h"
#include "screen.h"
#include "speaker.h"
namespace {
class microb_state : public driver_device
{
public:
microb_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_dmac(*this, "dmac")
, m_p_chargen(*this, "chargen")
, m_beep(*this, "beep")
, m_usart(*this, "usart%u", 1U)
, m_rs232(*this, "rs232%c", 'a')
, m_io_keyboard(*this, "X%u", 0U)
{ }
void microb(machine_config &config);
protected:
virtual void machine_start() override;
private:
void dmac_hrq_w(int state);
u8 dmac_mem_r(offs_t offset);
void dmac_mem_w(offs_t offset, u8 data);
I8275_DRAW_CHARACTER_MEMBER(draw_character);
u8 ppi2_pa_r();
void ppi2_pc_w(u8 data);
void microb_io(address_map &map);
void microb_mem(address_map &map);
required_device<cpu_device> m_maincpu;
required_device<i8257_device> m_dmac;
required_region_ptr<u8> m_p_chargen;
required_device<beep_device> m_beep;
required_device_array<i8251_device, 2> m_usart;
required_device_array<rs232_port_device, 2> m_rs232;
required_ioport_array<16> m_io_keyboard;
u8 m_keyline = 0U;
};
void microb_state::dmac_hrq_w(int state)
{
m_maincpu->set_input_line(INPUT_LINE_HALT, state ? ASSERT_LINE : CLEAR_LINE);
m_dmac->hlda_w(state);
}
u8 microb_state::dmac_mem_r(offs_t offset)
{
return m_maincpu->space(AS_PROGRAM).read_byte(offset);
}
void microb_state::dmac_mem_w(offs_t offset, u8 data)
{
return m_maincpu->space(AS_PROGRAM).write_byte(offset, data);
}
u8 microb_state::ppi2_pa_r()
{
return m_io_keyboard[m_keyline & 15]->read();
}
void microb_state::ppi2_pc_w(u8 data)
{
m_keyline = data;
m_beep->set_state(!BIT(data, 4));
}
void microb_state::microb_mem(address_map &map)
{
map.unmap_value_high();
map(0x0000, 0x17ff).rom();
map(0x8000, 0x8fff).ram();
}
void microb_state::microb_io(address_map &map)
{
map.global_mask(0xff);
map.unmap_value_high();
map(0x00, 0x09).rw(m_dmac, FUNC(i8257_device::read), FUNC(i8257_device::write));
map(0x10, 0x13).rw("ppi1", FUNC(i8255_device::read), FUNC(i8255_device::write));
map(0x20, 0x21).rw(m_usart[0], FUNC(i8251_device::read), FUNC(i8251_device::write));
map(0x30, 0x31).rw(m_usart[1], FUNC(i8251_device::read), FUNC(i8251_device::write));
map(0x50, 0x51).rw("crtc", FUNC(i8275_device::read), FUNC(i8275_device::write));
map(0x60, 0x63).rw("ppi2", FUNC(i8255_device::read), FUNC(i8255_device::write));
map(0xe0, 0xe3).rw("pit1", FUNC(pit8253_device::read), FUNC(pit8253_device::write));
map(0xf0, 0xf3).rw("pit2", FUNC(pit8253_device::read), FUNC(pit8253_device::write));
}
/* Input ports */
static INPUT_PORTS_START( microb )
PORT_START("X0")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Q") PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("W") PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("E") PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E')
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("R") PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R')
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("T") PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Y") PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("U") PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("I") PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I')
PORT_START("X1")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("O") PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("P") PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("A") PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A')
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("S") PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S')
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("D") PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("F") PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("G") PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("H") PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H')
PORT_START("X2")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("J") PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("K") PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("L") PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L')
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Z") PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z')
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("X") PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("C") PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("V") PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("B") PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B')
PORT_START("X3")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("N") PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("M") PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("`") PORT_CODE(KEYCODE_TILDE) PORT_CHAR('`') PORT_CHAR('~')
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("[") PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[') PORT_CHAR(']')
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("\\") PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\\') PORT_CHAR('|')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME(";") PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR(':')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("'") PORT_CODE(KEYCODE_QUOTE) PORT_CHAR('\'') PORT_CHAR('"')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("{") PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR('{') PORT_CHAR('}')
PORT_START("X4")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("<") PORT_CODE(KEYCODE_BACKSLASH2) PORT_CHAR('<') PORT_CHAR('>')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME(",") PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME(".") PORT_CODE(KEYCODE_STOP) PORT_CHAR('.')
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("/") PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?')
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("1") PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("2") PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('@')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("3") PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("4") PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
PORT_START("X5")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("5") PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("6") PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('^')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("7") PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('&')
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("8") PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('*')
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("9") PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR('(')
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR(')')
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("-") PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('_')
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("=") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=') PORT_CHAR('+')
PORT_START("X6")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("7pad") PORT_CODE(KEYCODE_7_PAD)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("8pad") PORT_CODE(KEYCODE_8_PAD)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("9pad") PORT_CODE(KEYCODE_9_PAD)
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("X7")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_UNUSED) // Does a HOME
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Home") PORT_CODE(KEYCODE_HOME)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("4pad") PORT_CODE(KEYCODE_4_PAD)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("5pad") PORT_CODE(KEYCODE_5_PAD)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("6pad") PORT_CODE(KEYCODE_6_PAD)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Backspace") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8)
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("X8")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("1pad") PORT_CODE(KEYCODE_1_PAD)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("2pad") PORT_CODE(KEYCODE_2_PAD)
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("3pad") PORT_CODE(KEYCODE_3_PAD)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Esc") PORT_CODE(KEYCODE_ESC)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Show/Hide Status")
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Down") PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN))
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Up") PORT_CODE(KEYCODE_UP) PORT_CHAR(UCHAR_MAMEKEY(UP))
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("0pad") PORT_CODE(KEYCODE_0_PAD)
PORT_START("X9")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME(".pad") PORT_CODE(KEYCODE_DEL_PAD)
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("-pad") PORT_CODE(KEYCODE_MINUS_PAD)
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Cursor Blink On/Off")
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED) // carriage return
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Left") PORT_CODE(KEYCODE_LEFT) PORT_CHAR(UCHAR_MAMEKEY(LEFT))
PORT_START("X10")
PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Right") PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT))
PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Space") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("XMIT") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_BIT(0x80, IP_ACTIVE_LOW, IPT_UNUSED)
// This row is scanned but nothing happens
PORT_START("X11")
PORT_BIT(0xff, IP_ACTIVE_LOW, IPT_UNUSED)
// These probably not exist
PORT_START("X12")
PORT_BIT(0xff, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("X13")
PORT_BIT(0xff, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("X14")
PORT_BIT(0xff, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("X15")
PORT_BIT(0xff, IP_ACTIVE_LOW, IPT_UNUSED)
PORT_START("MODIFIERS")
PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Capslock") PORT_CODE(KEYCODE_CAPSLOCK)
PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("LCtrl") PORT_CODE(KEYCODE_LCONTROL) PORT_CHAR(UCHAR_SHIFT_2)
PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("RCtrl") PORT_CODE(KEYCODE_RCONTROL)
PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("LShift") PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("RShift") PORT_CODE(KEYCODE_RSHIFT)
PORT_BIT(0x83, IP_ACTIVE_LOW, IPT_UNUSED)
// assumed to be dipswitches, purpose unknown, see code from 12D
PORT_START("DIPS")
PORT_DIPNAME( 0x01, 0x01, "Switch A") PORT_DIPLOCATION("SW1:1")
PORT_DIPSETTING( 0x01, DEF_STR(Off))
PORT_DIPSETTING( 0x00, DEF_STR(On))
PORT_DIPNAME( 0x02, 0x02, "Switch B") PORT_DIPLOCATION("SW1:2")
PORT_DIPSETTING( 0x02, DEF_STR(Off))
PORT_DIPSETTING( 0x00, DEF_STR(On))
PORT_BIT(0x3c, 0x2c, IPT_UNUSED) // this is required to sync keyboard and A-LOCK indicator
PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED) // unused
PORT_DIPNAME( 0x80, 0x80, "Switch C") PORT_DIPLOCATION("SW1:3")
PORT_DIPSETTING( 0x80, DEF_STR(Off))
PORT_DIPSETTING( 0x00, DEF_STR(On))
INPUT_PORTS_END
void microb_state::machine_start()
{
save_item(NAME(m_keyline));
}
I8275_DRAW_CHARACTER_MEMBER(microb_state::draw_character)
{
using namespace i8275_attributes;
u8 dots = BIT(attrcode, LTEN) ? 0xff : (BIT(attrcode, VSP) || linecount == 9) ? 0 : m_p_chargen[(charcode << 4) | linecount];
if (BIT(attrcode, RVV))
dots ^= 0xff;
// HLGT is active on status line
rgb_t const fg = BIT(attrcode, HLGT) ? rgb_t(0xc0, 0xc0, 0xc0) : rgb_t::white();
u32 *pix = &bitmap.pix(y, x);
for (int i = 0; i < 8; i++)
{
*pix++ = BIT(dots, 7) ? fg : rgb_t::black();
dots <<= 1;
}
}
void microb_state::microb(machine_config &config)
{
/* basic machine hardware */
I8085A(config, m_maincpu, XTAL(4'000'000));
m_maincpu->set_addrmap(AS_PROGRAM, µb_state::microb_mem);
m_maincpu->set_addrmap(AS_IO, µb_state::microb_io);
INPUT_MERGER_ANY_HIGH(config, "usartint").output_handler().set_inputline(m_maincpu, I8085_RST55_LINE);
I8257(config, m_dmac, 2'000'000);
m_dmac->out_hrq_cb().set(FUNC(microb_state::dmac_hrq_w));
m_dmac->in_memr_cb().set(FUNC(microb_state::dmac_mem_r));
m_dmac->out_memw_cb().set(FUNC(microb_state::dmac_mem_w));
m_dmac->out_iow_cb<2>().set("crtc", FUNC(i8275_device::dack_w));
m_dmac->out_tc_cb().set_inputline(m_maincpu, I8085_RST75_LINE);
/* video hardware */
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER, rgb_t::green()));
screen.set_raw(1'620'000 * 8, 800, 0, 640, 324, 0, 300);
//screen.set_raw(1'620'000 * 8, 800, 0, 640, 270, 0, 250);
screen.set_screen_update("crtc", FUNC(i8275_device::screen_update));
i8275_device &crtc(I8275(config, "crtc", 1'620'000));
crtc.set_screen("screen");
crtc.set_character_width(8);
crtc.set_display_callback(FUNC(microb_state::draw_character));
crtc.irq_wr_callback().set_inputline(m_maincpu, I8085_RST65_LINE);
crtc.drq_wr_callback().set(m_dmac, FUNC(i8257_device::dreq2_w));
i8255_device &ppi1(I8255(config, "ppi1"));
ppi1.in_pb_callback().set_ioport("DIPS");
i8255_device &ppi2(I8255(config, "ppi2"));
ppi2.in_pa_callback().set(FUNC(microb_state::ppi2_pa_r));
ppi2.in_pb_callback().set_ioport("MODIFIERS");
ppi2.out_pc_callback().set(FUNC(microb_state::ppi2_pc_w));
pit8253_device &pit1(PIT8253(config, "pit1"));
pit1.set_clk<2>(1'536'000);
pit1.out_handler<2>().set(m_usart[1], FUNC(i8251_device::write_rxc));
pit8253_device &pit2(PIT8253(config, "pit2"));
pit2.set_clk<0>(1'536'000);
pit2.set_clk<1>(1'536'000);
pit2.set_clk<2>(1'536'000);
pit2.out_handler<0>().set(m_usart[0], FUNC(i8251_device::write_txc));
pit2.out_handler<1>().set(m_usart[0], FUNC(i8251_device::write_rxc));
pit2.out_handler<2>().set(m_usart[1], FUNC(i8251_device::write_txc));
SPEAKER(config, "mono").front_center();
BEEP(config, m_beep, 1000).add_route(ALL_OUTPUTS, "mono", 0.5);
I8251(config, m_usart[0], 0);
m_usart[0]->txd_handler().set(m_rs232[0], FUNC(rs232_port_device::write_txd));
m_usart[0]->dtr_handler().set(m_rs232[0], FUNC(rs232_port_device::write_dtr));
m_usart[0]->rts_handler().set(m_rs232[0], FUNC(rs232_port_device::write_rts));
m_usart[0]->rxrdy_handler().set("usartint", FUNC(input_merger_device::in_w<0>));
m_usart[0]->txrdy_handler().set("usartint", FUNC(input_merger_device::in_w<1>));
RS232_PORT(config, m_rs232[0], default_rs232_devices, nullptr);
m_rs232[0]->rxd_handler().set(m_usart[0], FUNC(i8251_device::write_rxd));
m_rs232[0]->dsr_handler().set(m_usart[0], FUNC(i8251_device::write_dsr));
m_rs232[0]->cts_handler().set(m_usart[0], FUNC(i8251_device::write_cts));
I8251(config, m_usart[1], 0);
m_usart[1]->txd_handler().set(m_rs232[1], FUNC(rs232_port_device::write_txd));
m_usart[1]->dtr_handler().set(m_rs232[1], FUNC(rs232_port_device::write_dtr));
m_usart[1]->rts_handler().set(m_rs232[1], FUNC(rs232_port_device::write_rts));
m_usart[1]->rxrdy_handler().set("usartint", FUNC(input_merger_device::in_w<2>));
m_usart[1]->txrdy_handler().set("usartint", FUNC(input_merger_device::in_w<3>));
RS232_PORT(config, m_rs232[1], default_rs232_devices, nullptr);
m_rs232[1]->rxd_handler().set(m_usart[1], FUNC(i8251_device::write_rxd));
m_rs232[1]->dsr_handler().set(m_usart[1], FUNC(i8251_device::write_dsr));
m_rs232[1]->cts_handler().set(m_usart[1], FUNC(i8251_device::write_cts));
}
/* ROM definition */
ROM_START( dm3270 )
ROM_REGION( 0x1800, "maincpu", 0 )
ROM_LOAD( "dm3270-1.rom", 0x0000, 0x0800, CRC(781bde32) SHA1(a3fe25baadd2bfc2b1791f509bb0f4960281ee32) )
ROM_LOAD( "dm3270-2.rom", 0x0800, 0x0800, CRC(4d3476b7) SHA1(627ad42029ca6c8574cda8134d047d20515baf53) )
ROM_LOAD( "dm3270-3.rom", 0x1000, 0x0800, CRC(dbf15833) SHA1(ae93117260a259236c50885c5cecead2aad9b3c4) )
/* character generator not dumped, using the one from 'c10' for now */
ROM_REGION( 0x2000, "chargen", 0 )
ROM_LOAD( "c10_char.bin", 0x0000, 0x2000, BAD_DUMP CRC(cb530b6f) SHA1(95590bbb433db9c4317f535723b29516b9b9fcbf))
ROM_END
} // Anonymous namespace
// YEAR NAME PARENT COMPAT MACHINE INPU CLASS INIT COMPANY FULLNAME FLAGS
COMP( 1982, dm3270, 0, 0, microb, microb, microb_state, empty_init, "Beehive International", "DM3270 Control Unit Display Station", MACHINE_IMPERFECT_SOUND | MACHINE_SUPPORTS_SAVE )