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mame/src/mess/drivers/c80.c
Miodrag Milanovic 7285b359d2 Merge of MESS sources (no whatsnew)
2012-08-21 10:41:19 +00:00

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7.8 KiB
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/***************************************************************************
C-80
12/05/2009 Skeleton driver.
Pasting:
0-F : as is
+ (inc) : ^
- (dec) : V
M : -
GO : X
Test Paste:
-800^11^22^33^44^55^66^77^88^99^-800
Now press up-arrow to confirm the data has been entered.
****************************************************************************/
#include "includes/c80.h"
#include "c80.lh"
/* Memory Maps */
static ADDRESS_MAP_START( c80_mem, AS_PROGRAM, 8, c80_state )
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x0000, 0x07ff) AM_ROM
AM_RANGE(0x0800, 0x0bff) AM_MIRROR(0x400) AM_RAM
ADDRESS_MAP_END
static ADDRESS_MAP_START( c80_io, AS_IO, 8, c80_state )
ADDRESS_MAP_GLOBAL_MASK(0xff)
AM_RANGE(0x7c, 0x7f) AM_DEVREADWRITE(Z80PIO2_TAG, z80pio_device, read, write)
AM_RANGE(0xbc, 0xbf) AM_DEVREADWRITE(Z80PIO1_TAG, z80pio_device, read, write)
ADDRESS_MAP_END
/* Input Ports */
INPUT_CHANGED_MEMBER( c80_state::trigger_reset )
{
m_maincpu->set_input_line(INPUT_LINE_RESET, newval ? CLEAR_LINE : ASSERT_LINE);
}
INPUT_CHANGED_MEMBER( c80_state::trigger_nmi )
{
m_maincpu->set_input_line(INPUT_LINE_NMI, newval ? CLEAR_LINE : ASSERT_LINE);
}
static INPUT_PORTS_START( c80 )
PORT_START("ROW0")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("REG") PORT_CODE(KEYCODE_R) PORT_CHAR('R')
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("GO") PORT_CODE(KEYCODE_G) PORT_CODE(KEYCODE_X) PORT_CHAR('X')
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_D) PORT_CHAR('D')
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_A) PORT_CHAR('A')
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7')
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4')
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1')
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("FCN") PORT_CODE(KEYCODE_F1)
PORT_START("ROW1")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("+") PORT_CODE(KEYCODE_UP) PORT_CHAR('^')
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("-") PORT_CODE(KEYCODE_DOWN) PORT_CHAR('V')
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_E) PORT_CHAR('E')
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_B) PORT_CHAR('B')
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8')
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5')
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2')
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0')
PORT_START("ROW2")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNUSED )
PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F) PORT_CHAR('F')
PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_C) PORT_CHAR('C')
PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9')
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6')
PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3')
PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("MEM") PORT_CODE(KEYCODE_M) PORT_CHAR('-')
PORT_START("SPECIAL")
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("RES") PORT_CODE(KEYCODE_F10) PORT_CHANGED_MEMBER(DEVICE_SELF, c80_state, trigger_reset, 0)
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("BRK") PORT_CODE(KEYCODE_ESC) PORT_CHANGED_MEMBER(DEVICE_SELF, c80_state, trigger_nmi, 0)
INPUT_PORTS_END
/* Z80-PIO Interface */
READ8_MEMBER( c80_state::pio1_pa_r )
{
/*
bit description
PA0 keyboard row 0 input
PA1 keyboard row 1 input
PA2 keyboard row 2 input
PA3
PA4 _BSTB input
PA5 display enable output (0=enabled, 1=disabled)
PA6 tape output
PA7 tape input
*/
UINT8 data = !m_pio1_brdy << 4 | 0x07;
int i;
for (i = 0; i < 8; i++)
{
if (!BIT(m_keylatch, i))
{
if (!BIT(ioport("ROW0")->read(), i)) data &= ~0x01;
if (!BIT(ioport("ROW1")->read(), i)) data &= ~0x02;
if (!BIT(ioport("ROW2")->read(), i)) data &= ~0x04;
}
}
data |= (m_cassette->input() < +0.0) << 7;
return data;
}
WRITE8_MEMBER( c80_state::pio1_pa_w )
{
/*
bit description
PA0 keyboard row 0 input
PA1 keyboard row 1 input
PA2 keyboard row 2 input
PA3
PA4 _BSTB input
PA5 display enable output (0=enabled, 1=disabled)
PA6 tape output
PA7 tape input
*/
m_pio1_a5 = BIT(data, 5);
if (!BIT(data, 5))
{
m_digit = 0;
}
m_cassette->output(BIT(data, 6) ? +1.0 : -1.0);
}
WRITE8_MEMBER( c80_state::pio1_pb_w )
{
/*
bit description
PB0 VQD30 segment A
PB1 VQD30 segment B
PB2 VQD30 segment C
PB3 VQD30 segment D
PB4 VQD30 segment E
PB5 VQD30 segment F
PB6 VQD30 segment G
PB7 VQD30 segment P
*/
if (!m_pio1_a5)
{
output_set_digit_value(m_digit, data);
}
m_keylatch = data;
}
WRITE_LINE_MEMBER( c80_state::pio1_brdy_w )
{
m_pio1_brdy = state;
if (state)
{
if (!m_pio1_a5)
{
m_digit++;
}
m_pio1->strobe_b(1);
m_pio1->strobe_b(0);
}
}
static Z80PIO_INTERFACE( pio1_intf )
{
DEVCB_CPU_INPUT_LINE(Z80_TAG, INPUT_LINE_IRQ0), /* callback when change interrupt status */
DEVCB_DRIVER_MEMBER(c80_state, pio1_pa_r), /* port A read callback */
DEVCB_DRIVER_MEMBER(c80_state, pio1_pa_w), /* port A write callback */
DEVCB_NULL, /* portA ready active callback */
DEVCB_NULL, /* port B read callback */
DEVCB_DRIVER_MEMBER(c80_state, pio1_pb_w), /* port B write callback */
DEVCB_DRIVER_LINE_MEMBER(c80_state, pio1_brdy_w) /* portB ready active callback */
};
static Z80PIO_INTERFACE( pio2_intf )
{
DEVCB_CPU_INPUT_LINE(Z80_TAG, INPUT_LINE_IRQ0), /* callback when change interrupt status */
DEVCB_NULL, /* port A read callback */
DEVCB_NULL, /* port A write callback */
DEVCB_NULL, /* portA ready active callback */
DEVCB_NULL, /* port B read callback */
DEVCB_NULL, /* port B write callback */
DEVCB_NULL /* portB ready active callback */
};
/* Z80 Daisy Chain */
static const z80_daisy_config c80_daisy_chain[] =
{
{ Z80PIO1_TAG },
{ Z80PIO2_TAG },
{ NULL }
};
/* Machine Initialization */
void c80_state::machine_start()
{
/* register for state saving */
save_item(NAME(m_keylatch));
save_item(NAME(m_digit));
save_item(NAME(m_pio1_a5));
save_item(NAME(m_pio1_brdy));
}
/* Machine Driver */
static const cassette_interface c80_cassette_interface =
{
cassette_default_formats,
NULL,
(cassette_state)(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_MUTED),
NULL,
NULL
};
static MACHINE_CONFIG_START( c80, c80_state )
/* basic machine hardware */
MCFG_CPU_ADD(Z80_TAG, Z80, 2500000) /* U880D */
MCFG_CPU_PROGRAM_MAP(c80_mem)
MCFG_CPU_IO_MAP(c80_io)
MCFG_CPU_CONFIG(c80_daisy_chain)
/* video hardware */
MCFG_DEFAULT_LAYOUT( layout_c80 )
/* devices */
MCFG_Z80PIO_ADD(Z80PIO1_TAG, 2500000, pio1_intf)
MCFG_Z80PIO_ADD(Z80PIO2_TAG, 2500000, pio2_intf)
MCFG_CASSETTE_ADD(CASSETTE_TAG, c80_cassette_interface)
/* internal ram */
MCFG_RAM_ADD(RAM_TAG)
MCFG_RAM_DEFAULT_SIZE("1K")
MACHINE_CONFIG_END
/* ROMs */
ROM_START( c80 )
ROM_REGION( 0x10000, Z80_TAG, 0 )
ROM_LOAD( "c80.d3", 0x0000, 0x0400, CRC(ad2b3296) SHA1(14f72cb73a4068b7a5d763cc0e254639c251ce2e) )
ROM_END
/* System Drivers */
/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
COMP( 1986, c80, 0, 0, c80, c80, driver_device, 0, "Joachim Czepa", "C-80", GAME_SUPPORTS_SAVE | GAME_NO_SOUND)
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