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4460827d21
mame/src/mess/machine/genpc.c
Ivan Vangelista 4460827d21 am9517a_device: converted to devcb2 (nw)
2014-04-29 16:56:31 +00:00

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/***************************************************************************
machine/genpc.c
***************************************************************************/
#include "emu.h"
#include "includes/genpc.h"
#include "machine/i8255.h"
#include "machine/pic8259.h"
#include "machine/pit8253.h"
#include "sound/speaker.h"
#include "machine/ram.h"
#include "imagedev/cassette.h"
#define VERBOSE_PIO 0 /* PIO (keyboard controller) */
#define PIO_LOG(N,M,A) \
do { \
if(VERBOSE_PIO>=N) \
{ \
if( M ) \
logerror("%11.6f: %-24s",machine().time().as_double(),(char*)M ); \
logerror A; \
} \
} while (0)
/*************************************************************************
*
* PC DMA stuff
*
*************************************************************************/
READ8_MEMBER( ibm5160_mb_device::pc_page_r)
{
return 0xff;
}
WRITE8_MEMBER( ibm5160_mb_device::pc_page_w)
{
switch(offset % 4)
{
case 1:
m_dma_offset[2] = data;
break;
case 2:
m_dma_offset[3] = data;
break;
case 3:
m_dma_offset[0] = m_dma_offset[1] = data;
break;
}
}
WRITE_LINE_MEMBER( ibm5160_mb_device::pc_dma_hrq_changed )
{
m_maincpu->set_input_line(INPUT_LINE_HALT, state ? ASSERT_LINE : CLEAR_LINE);
/* Assert HLDA */
m_dma8237->hack_w(state);
}
READ8_MEMBER( ibm5160_mb_device::pc_dma_read_byte )
{
if(m_dma_channel == -1)
return 0xff;
address_space &spaceio = m_maincpu->space(AS_PROGRAM);
offs_t page_offset = (((offs_t) m_dma_offset[m_dma_channel]) << 16) & 0x0F0000;
return spaceio.read_byte( page_offset + offset);
}
WRITE8_MEMBER( ibm5160_mb_device::pc_dma_write_byte )
{
if(m_dma_channel == -1)
return;
address_space &spaceio = m_maincpu->space(AS_PROGRAM);
offs_t page_offset = (((offs_t) m_dma_offset[m_dma_channel]) << 16) & 0x0F0000;
spaceio.write_byte( page_offset + offset, data);
}
READ8_MEMBER( ibm5160_mb_device::pc_dma8237_1_dack_r )
{
return m_isabus->dack_r(1);
}
READ8_MEMBER( ibm5160_mb_device::pc_dma8237_2_dack_r )
{
return m_isabus->dack_r(2);
}
READ8_MEMBER( ibm5160_mb_device::pc_dma8237_3_dack_r )
{
return m_isabus->dack_r(3);
}
WRITE8_MEMBER( ibm5160_mb_device::pc_dma8237_1_dack_w )
{
m_isabus->dack_w(1,data);
}
WRITE8_MEMBER( ibm5160_mb_device::pc_dma8237_2_dack_w )
{
m_isabus->dack_w(2,data);
}
WRITE8_MEMBER( ibm5160_mb_device::pc_dma8237_3_dack_w )
{
m_isabus->dack_w(3,data);
}
WRITE8_MEMBER( ibm5160_mb_device::pc_dma8237_0_dack_w )
{
m_u73_q2 = 0;
m_dma8237->dreq0_w( m_u73_q2 );
}
WRITE_LINE_MEMBER( ibm5160_mb_device::pc_dma8237_out_eop )
{
m_cur_eop = state == ASSERT_LINE;
if(m_dma_channel != -1 && m_cur_eop)
m_isabus->eop_w(m_dma_channel, m_cur_eop ? ASSERT_LINE : CLEAR_LINE );
}
void ibm5160_mb_device::pc_select_dma_channel(int channel, bool state)
{
if(!state) {
m_dma_channel = channel;
if(m_cur_eop)
m_isabus->eop_w(channel, ASSERT_LINE );
} else if(m_dma_channel == channel) {
m_dma_channel = -1;
if(m_cur_eop)
m_isabus->eop_w(channel, CLEAR_LINE );
}
}
WRITE_LINE_MEMBER( ibm5160_mb_device::pc_dack0_w ) { pc_select_dma_channel(0, state); }
WRITE_LINE_MEMBER( ibm5160_mb_device::pc_dack1_w ) { pc_select_dma_channel(1, state); }
WRITE_LINE_MEMBER( ibm5160_mb_device::pc_dack2_w ) { pc_select_dma_channel(2, state); }
WRITE_LINE_MEMBER( ibm5160_mb_device::pc_dack3_w ) { pc_select_dma_channel(3, state); }
/*************************************************************
*
* pic8259 configuration
*
*************************************************************/
WRITE_LINE_MEMBER(ibm5160_mb_device::pc_speaker_set_spkrdata)
{
m_pc_spkrdata = state ? 1 : 0;
m_speaker->level_w(m_pc_spkrdata & m_pit_out2);
}
/*************************************************************
*
* pit8253 configuration
*
*************************************************************/
WRITE_LINE_MEMBER( ibm5160_mb_device::pc_pit8253_out1_changed )
{
/* Trigger DMA channel #0 */
if ( m_out1 == 0 && state == 1 && m_u73_q2 == 0 )
{
m_u73_q2 = 1;
m_dma8237->dreq0_w( m_u73_q2 );
}
m_out1 = state;
}
WRITE_LINE_MEMBER( ibm5160_mb_device::pc_pit8253_out2_changed )
{
m_pit_out2 = state ? 1 : 0;
m_speaker->level_w(m_pc_spkrdata & m_pit_out2);
}
/**********************************************************
*
* PPI8255 interface
*
*
* PORT A (input)
*
* Directly attached to shift register which stores data
* received from the keyboard.
*
* PORT B (output)
* 0 - PB0 - TIM2GATESPK - Enable/disable counting on timer 2 of the 8253
* 1 - PB1 - SPKRDATA - Speaker data
* 2 - PB2 - - Enable receiving data from the keyboard when keyboard is not locked.
* 3 - PB3 - - Dipsswitch set selector
* 4 - PB4 - ENBRAMPCK - Enable ram parity check
* 5 - PB5 - ENABLEI/OCK - Enable expansion I/O check
* 6 - PB6 - - Connected to keyboard clock signal
* 0 = ignore keyboard signals
* 1 = accept keyboard signals
* 7 - PB7 - - Clear/disable shift register and IRQ1 line
* 0 = normal operation
* 1 = clear and disable shift register and clear IRQ1 flip flop
*
* PORT C
* 0 - PC0 - - Dipswitch 0/4 SW1
* 1 - PC1 - - Dipswitch 1/5 SW1
* 2 - PC2 - - Dipswitch 2/6 SW1
* 3 - PC3 - - Dipswitch 3/7 SW1
* 4 - PC4 - SPK - Speaker/cassette data
* 5 - PC5 - I/OCHCK - Expansion I/O check result
* 6 - PC6 - T/C2OUT - Output of 8253 timer 2
* 7 - PC7 - PCK - Parity check result
*
* IBM5150 SW1:
* 0 - OFF - One or more floppy drives
* ON - Diskless operation
* 1 - OFF - 8087 present
* ON - No 8087 present
* 2+3 - Used to determine on board memory configuration
* OFF OFF - 64KB
* ON OFF - 48KB
* OFF ON - 32KB
* ON ON - 16KB
* 4+5 - Used to select display
* OFF OFF - Monochrome
* ON OFF - CGA, 80 column
* OFF ON - CGA, 40 column
* ON ON - EGA/VGA display
* 6+7 - Used to select number of disk drives
* OFF OFF - four disk drives
* ON OFF - three disk drives
* OFF ON - two disk drives
* ON ON - one disk drive
*
**********************************************************/
WRITE_LINE_MEMBER( ibm5150_mb_device::keyboard_clock_w )
{
if (!m_ppi_keyboard_clear && !state && !m_ppi_shift_enable)
{
m_ppi_shift_enable = m_ppi_shift_register & 0x01;
m_ppi_shift_register >>= 1;
m_ppi_shift_register |= m_ppi_data_signal << 7;
m_pic8259->ir1_w(m_ppi_shift_enable);
m_pc_kbdc->data_write_from_mb(!m_ppi_shift_enable);
}
}
WRITE_LINE_MEMBER( ec1841_mb_device::keyboard_clock_w )
{
if (!m_ppi_keyboard_clear && !state && !m_ppi_shift_enable)
{
m_ppi_shift_enable = m_ppi_shift_register & 0x01;
m_ppi_shift_register >>= 1;
m_ppi_shift_register |= m_ppi_data_signal << 7;
m_pic8259->ir1_w(m_ppi_shift_enable);
m_pc_kbdc->data_write_from_mb(!m_ppi_shift_enable);
}
}
WRITE_LINE_MEMBER( ibm5160_mb_device::keyboard_clock_w )
{
if (!m_ppi_keyboard_clear && !state && !m_ppi_shift_enable)
{
m_ppi_shift_enable = m_ppi_shift_register & 0x01;
m_ppi_shift_register >>= 1;
m_ppi_shift_register |= m_ppi_data_signal << 7;
m_pic8259->ir1_w(m_ppi_shift_enable);
m_pc_kbdc->data_write_from_mb(!BIT(m_ppi_portb, 2) && !m_ppi_shift_enable);
}
}
WRITE_LINE_MEMBER( ibm5160_mb_device::keyboard_data_w )
{
m_ppi_data_signal = state;
}
READ8_MEMBER (ibm5160_mb_device::pc_ppi_porta_r)
{
int data = 0xFF;
/* KB port A */
if (m_ppi_keyboard_clear)
{
/* 0 0 - no floppy drives
* 1 Not used
* 2-3 The number of memory banks on the system board
* 4-5 Display mode
* 11 = monochrome
* 10 - color 80x25
* 01 - color 40x25
* 6-7 The number of floppy disk drives
*/
data = ioport("DSW0")->read();
}
else
{
data = m_ppi_shift_register;
}
PIO_LOG(1,"PIO_A_r",("$%02x\n", data));
return data;
}
READ8_MEMBER ( ibm5160_mb_device::pc_ppi_portc_r )
{
int data=0xff;
data&=~0x80; // no parity error
data&=~0x40; // no error on expansion board
/* KB port C: equipment flags */
if (m_ppi_portc_switch_high)
{
/* read hi nibble of S2 */
data = (data & 0xf0) | ((ioport("DSW0")->read() >> 4) & 0x0f);
PIO_LOG(1,"PIO_C_r (hi)",("$%02x\n", data));
}
else
{
/* read lo nibble of S2 */
data = (data & 0xf0) | (ioport("DSW0")->read() & 0x0f);
PIO_LOG(1,"PIO_C_r (lo)",("$%02x\n", data));
}
if ( m_ppi_portb & 0x01 )
{
data = ( data & ~0x10 ) | ( m_pit_out2 ? 0x10 : 0x00 );
}
data = ( data & ~0x20 ) | ( m_pit_out2 ? 0x20 : 0x00 );
return data;
}
WRITE8_MEMBER( ibm5160_mb_device::pc_ppi_portb_w )
{
/* PPI controller port B*/
m_ppi_portb = data;
m_ppi_portc_switch_high = data & 0x08;
m_ppi_keyboard_clear = data & 0x80;
m_ppi_keyb_clock = data & 0x40;
m_pit8253->write_gate2(BIT(data, 0));
pc_speaker_set_spkrdata( data & 0x02 );
/* If PB7 is set clear the shift register and reset the IRQ line */
if ( m_ppi_keyboard_clear )
{
m_ppi_shift_register = 0;
m_ppi_shift_enable = 0;
m_pic8259->ir1_w(m_ppi_shift_enable);
}
m_pc_kbdc->data_write_from_mb(!BIT(m_ppi_portb, 2) && !m_ppi_shift_enable);
m_ppi_clock_signal = ( m_ppi_keyb_clock ) ? 1 : 0;
m_pc_kbdc->clock_write_from_mb(m_ppi_clock_signal);
}
/**********************************************************
*
* NMI handling
*
**********************************************************/
WRITE8_MEMBER( ibm5160_mb_device::nmi_enable_w )
{
m_nmi_enabled = BIT(data,7);
m_isabus->set_nmi_state(m_nmi_enabled);
}
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
const device_type IBM5160_MOTHERBOARD = &device_creator<ibm5160_mb_device>;
//**************************************************************************
// DEVICE CONFIGURATION
//**************************************************************************
static MACHINE_CONFIG_FRAGMENT( ibm5160_mb_config )
MCFG_DEVICE_ADD("pit8253", PIT8253, 0)
MCFG_PIT8253_CLK0(XTAL_14_31818MHz/12) /* heartbeat IRQ */
MCFG_PIT8253_OUT0_HANDLER(DEVWRITELINE("pic8259", pic8259_device, ir0_w))
MCFG_PIT8253_CLK1(XTAL_14_31818MHz/12) /* dram refresh */
MCFG_PIT8253_OUT1_HANDLER(WRITELINE(ibm5160_mb_device, pc_pit8253_out1_changed))
MCFG_PIT8253_CLK2(XTAL_14_31818MHz/12) /* pio port c pin 4, and speaker polling enough */
MCFG_PIT8253_OUT2_HANDLER(WRITELINE(ibm5160_mb_device, pc_pit8253_out2_changed))
MCFG_DEVICE_ADD( "dma8237", AM9517A, XTAL_14_31818MHz/3 )
MCFG_I8237_OUT_HREQ_CB(WRITELINE(ibm5160_mb_device, pc_dma_hrq_changed))
MCFG_I8237_OUT_EOP_CB(WRITELINE(ibm5160_mb_device, pc_dma8237_out_eop))
MCFG_I8237_IN_MEMR_CB(READ8(ibm5160_mb_device, pc_dma_read_byte))
MCFG_I8237_OUT_MEMW_CB(WRITE8(ibm5160_mb_device, pc_dma_write_byte))
MCFG_I8237_IN_IOR_1_CB(READ8(ibm5160_mb_device, pc_dma8237_1_dack_r))
MCFG_I8237_IN_IOR_2_CB(READ8(ibm5160_mb_device, pc_dma8237_2_dack_r))
MCFG_I8237_IN_IOR_3_CB(READ8(ibm5160_mb_device, pc_dma8237_3_dack_r))
MCFG_I8237_OUT_IOW_0_CB(WRITE8(ibm5160_mb_device, pc_dma8237_0_dack_w))
MCFG_I8237_OUT_IOW_1_CB(WRITE8(ibm5160_mb_device, pc_dma8237_1_dack_w))
MCFG_I8237_OUT_IOW_2_CB(WRITE8(ibm5160_mb_device, pc_dma8237_2_dack_w))
MCFG_I8237_OUT_IOW_3_CB(WRITE8(ibm5160_mb_device, pc_dma8237_3_dack_w))
MCFG_I8237_OUT_DACK_0_CB(WRITELINE(ibm5160_mb_device, pc_dack0_w))
MCFG_I8237_OUT_DACK_1_CB(WRITELINE(ibm5160_mb_device, pc_dack1_w))
MCFG_I8237_OUT_DACK_2_CB(WRITELINE(ibm5160_mb_device, pc_dack2_w))
MCFG_I8237_OUT_DACK_3_CB(WRITELINE(ibm5160_mb_device, pc_dack3_w))
MCFG_PIC8259_ADD( "pic8259", INPUTLINE(":maincpu", 0), VCC, NULL )
MCFG_DEVICE_ADD("ppi8255", I8255A, 0)
MCFG_I8255_IN_PORTA_CB(READ8(ibm5160_mb_device, pc_ppi_porta_r))
MCFG_I8255_OUT_PORTB_CB(WRITE8(ibm5160_mb_device, pc_ppi_portb_w))
MCFG_I8255_IN_PORTC_CB(READ8(ibm5160_mb_device, pc_ppi_portc_r))
MCFG_DEVICE_ADD("isa", ISA8, 0)
MCFG_ISA8_CPU(":maincpu")
MCFG_ISA_OUT_IRQ2_CB(DEVWRITELINE("pic8259", pic8259_device, ir2_w))
MCFG_ISA_OUT_IRQ3_CB(DEVWRITELINE("pic8259", pic8259_device, ir3_w))
MCFG_ISA_OUT_IRQ4_CB(DEVWRITELINE("pic8259", pic8259_device, ir4_w))
MCFG_ISA_OUT_IRQ5_CB(DEVWRITELINE("pic8259", pic8259_device, ir5_w))
MCFG_ISA_OUT_IRQ6_CB(DEVWRITELINE("pic8259", pic8259_device, ir6_w))
MCFG_ISA_OUT_IRQ7_CB(DEVWRITELINE("pic8259", pic8259_device, ir7_w))
MCFG_ISA_OUT_DRQ1_CB(DEVWRITELINE("dma8237", am9517a_device, dreq1_w))
MCFG_ISA_OUT_DRQ2_CB(DEVWRITELINE("dma8237", am9517a_device, dreq2_w))
MCFG_ISA_OUT_DRQ3_CB(DEVWRITELINE("dma8237", am9517a_device, dreq3_w))
MCFG_DEVICE_ADD("pc_kbdc", PC_KBDC, 0)
MCFG_PC_KBDC_OUT_CLOCK_CB(WRITELINE(ibm5160_mb_device, keyboard_clock_w))
MCFG_PC_KBDC_OUT_DATA_CB(WRITELINE(ibm5160_mb_device, keyboard_data_w))
/* sound hardware */
MCFG_SPEAKER_STANDARD_MONO("mono")
MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00)
MACHINE_CONFIG_END
//-------------------------------------------------
// machine_config_additions - device-specific
// machine configurations
//-------------------------------------------------
machine_config_constructor ibm5160_mb_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME( ibm5160_mb_config );
}
static INPUT_PORTS_START( ibm5160_mb )
PORT_START("DSW0") /* IN1 */
PORT_DIPNAME( 0xc0, 0x40, "Number of floppy drives")
PORT_DIPSETTING( 0x00, "1" )
PORT_DIPSETTING( 0x40, "2" )
PORT_DIPSETTING( 0x80, "3" )
PORT_DIPSETTING( 0xc0, "4" )
PORT_DIPNAME( 0x30, 0x30, "Graphics adapter")
PORT_DIPSETTING( 0x00, "EGA/VGA" )
PORT_DIPSETTING( 0x10, "Color 40x25" )
PORT_DIPSETTING( 0x20, "Color 80x25" )
PORT_DIPSETTING( 0x30, "Monochrome" )
PORT_DIPNAME( 0x0c, 0x0c, "RAM banks")
PORT_DIPSETTING( 0x00, "1 - 16/ 64/256K" )
PORT_DIPSETTING( 0x04, "2 - 32/128/512K" )
PORT_DIPSETTING( 0x08, "3 - 48/192/576K" )
PORT_DIPSETTING( 0x0c, "4 - 64/256/640K" )
PORT_DIPNAME( 0x02, 0x00, "8087 installed")
PORT_DIPSETTING( 0x00, DEF_STR(No) )
PORT_DIPSETTING( 0x02, DEF_STR(Yes) )
PORT_DIPNAME( 0x01, 0x01, "Boot from floppy")
PORT_DIPSETTING( 0x01, DEF_STR(Yes) )
PORT_DIPSETTING( 0x00, DEF_STR(No) )
INPUT_PORTS_END
//-------------------------------------------------
// input_ports - device-specific input ports
//-------------------------------------------------
ioport_constructor ibm5160_mb_device::device_input_ports() const
{
return INPUT_PORTS_NAME( ibm5160_mb );
}
void ibm5160_mb_device::static_set_cputag(device_t &device, const char *tag)
{
ibm5160_mb_device &board = downcast<ibm5160_mb_device &>(device);
board.m_cputag = tag;
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// ibm5160_mb_device - constructor
//-------------------------------------------------
ibm5160_mb_device::ibm5160_mb_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: device_t(mconfig, IBM5160_MOTHERBOARD, "IBM5160_MOTHERBOARD", tag, owner, clock, "ibm5160_mb", __FILE__),
m_maincpu(*owner, "maincpu"),
m_pic8259(*this, "pic8259"),
m_dma8237(*this, "dma8237"),
m_pit8253(*this, "pit8253"),
m_ppi8255(*this, "ppi8255"),
m_speaker(*this, "speaker"),
m_isabus(*this, "isa"),
m_pc_kbdc(*this, "pc_kbdc"),
m_ram(*this, ":" RAM_TAG)
{
}
void ibm5160_mb_device::install_device(offs_t start, offs_t end, offs_t mask, offs_t mirror, read8_delegate rhandler, write8_delegate whandler)
{
int buswidth = m_maincpu->space_config(AS_IO)->m_databus_width;
switch(buswidth)
{
case 8:
if(!rhandler.isnull()) m_maincpu->space(AS_IO).install_read_handler(start, end, mask, mirror, rhandler, 0);
if(!whandler.isnull()) m_maincpu->space(AS_IO).install_write_handler(start, end, mask, mirror, whandler, 0);
break;
case 16:
if(!rhandler.isnull()) m_maincpu->space(AS_IO).install_read_handler(start, end, mask, mirror, rhandler, 0xffff);
if(!whandler.isnull()) m_maincpu->space(AS_IO).install_write_handler(start, end, mask, mirror, whandler, 0xffff);
break;
default:
fatalerror("IBM5160_MOTHERBOARD: Bus width %d not supported\n", buswidth);
break;
}
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void ibm5160_mb_device::device_start()
{
install_device(0x0000, 0x000f, 0, 0, read8_delegate(FUNC(am9517a_device::read), (am9517a_device*)m_dma8237), write8_delegate(FUNC(am9517a_device::write), (am9517a_device*)m_dma8237) );
install_device(0x0020, 0x0021, 0, 0, read8_delegate(FUNC(pic8259_device::read), (pic8259_device*)m_pic8259), write8_delegate(FUNC(pic8259_device::write), (pic8259_device*)m_pic8259) );
install_device(0x0040, 0x0043, 0, 0, read8_delegate(FUNC(pit8253_device::read), (pit8253_device*)m_pit8253), write8_delegate(FUNC(pit8253_device::write), (pit8253_device*)m_pit8253) );
install_device(0x0060, 0x0063, 0, 0, read8_delegate(FUNC(i8255_device::read), (i8255_device*)m_ppi8255), write8_delegate(FUNC(i8255_device::write), (i8255_device*)m_ppi8255) );
install_device(0x0080, 0x0087, 0, 0, read8_delegate(FUNC(ibm5160_mb_device::pc_page_r), this), write8_delegate(FUNC(ibm5160_mb_device::pc_page_w),this) );
install_device(0x00a0, 0x00a1, 0, 0, read8_delegate(), write8_delegate(FUNC(ibm5160_mb_device::nmi_enable_w),this));
/* MESS managed RAM */
if ( m_ram->pointer() )
membank( "bank10" )->set_base( m_ram->pointer() );
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void ibm5160_mb_device::device_reset()
{
m_u73_q2 = 0;
m_out1 = 2; // initial state of pit output is undefined
m_pc_spkrdata = 0;
m_pit_out2 = 0;
m_dma_channel = -1;
m_cur_eop = false;
memset(m_dma_offset,0,sizeof(m_dma_offset));
m_ppi_portc_switch_high = 0;
m_ppi_speaker = 0;
m_ppi_keyboard_clear = 0;
m_ppi_keyb_clock = 0;
m_ppi_portb = 0;
m_ppi_clock_signal = 0;
m_ppi_data_signal = 0;
m_ppi_shift_register = 0;
m_ppi_shift_enable = 0;
m_nmi_enabled = 0;
m_speaker->level_w(0);
}
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
const device_type IBM5150_MOTHERBOARD = &device_creator<ibm5150_mb_device>;
//**************************************************************************
// DEVICE CONFIGURATION
//**************************************************************************
static const cassette_interface ibm5150_cassette_interface =
{
cassette_default_formats,
NULL,
(cassette_state)(CASSETTE_PLAY | CASSETTE_MOTOR_DISABLED | CASSETTE_SPEAKER_ENABLED),
NULL,
NULL
};
static MACHINE_CONFIG_FRAGMENT( ibm5150_mb_config )
MCFG_FRAGMENT_ADD(ibm5160_mb_config)
MCFG_DEVICE_MODIFY("pc_kbdc")
MCFG_PC_KBDC_OUT_CLOCK_CB(WRITELINE(ibm5150_mb_device, keyboard_clock_w))
MCFG_CASSETTE_ADD( "cassette", ibm5150_cassette_interface )
MACHINE_CONFIG_END
//-------------------------------------------------
// machine_config_additions - device-specific
// machine configurations
//-------------------------------------------------
machine_config_constructor ibm5150_mb_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME( ibm5150_mb_config );
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// ibm5150_mb_device - constructor
//-------------------------------------------------
ibm5150_mb_device::ibm5150_mb_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: ibm5160_mb_device(mconfig, tag, owner, clock),
m_cassette(*this, "cassette")
{
}
void ibm5150_mb_device::device_start()
{
ibm5160_mb_device::device_start();
}
void ibm5150_mb_device::device_reset()
{
ibm5160_mb_device::device_reset();
}
READ8_MEMBER (ibm5150_mb_device::pc_ppi_porta_r)
{
int data = 0xFF;
/* KB port A */
if (m_ppi_keyboard_clear)
{
/* 0 0 - no floppy drives
* 1 Not used
* 2-3 The number of memory banks on the system board
* 4-5 Display mode
* 11 = monochrome
* 10 - color 80x25
* 01 - color 40x25
* 6-7 The number of floppy disk drives
*/
data = ioport("DSW0")->read() & 0xF3;
switch ( m_ram->size() )
{
case 16 * 1024:
data |= 0x00;
break;
case 32 * 1024: /* Need to verify if this is correct */
data |= 0x04;
break;
case 48 * 1024: /* Need to verify if this is correct */
data |= 0x08;
break;
default:
data |= 0x0C;
break;
}
}
else
{
data = m_ppi_shift_register;
}
PIO_LOG(1,"PIO_A_r",("$%02x\n", data));
return data;
}
READ8_MEMBER ( ibm5150_mb_device::pc_ppi_portc_r )
{
int data=0xff;
data&=~0x80; // no parity error
data&=~0x40; // no error on expansion board
/* KB port C: equipment flags */
if (m_ppi_portc_switch_high)
{
/* read hi nibble of SW2 */
data = data & 0xf0;
switch ( m_ram->size() - 64 * 1024 )
{
case 64 * 1024: data |= 0x00; break;
case 128 * 1024: data |= 0x02; break;
case 192 * 1024: data |= 0x04; break;
case 256 * 1024: data |= 0x06; break;
case 320 * 1024: data |= 0x08; break;
case 384 * 1024: data |= 0x0A; break;
case 448 * 1024: data |= 0x0C; break;
case 512 * 1024: data |= 0x0E; break;
case 576 * 1024: data |= 0x01; break;
case 640 * 1024: data |= 0x03; break;
case 704 * 1024: data |= 0x05; break;
case 768 * 1024: data |= 0x07; break;
case 832 * 1024: data |= 0x09; break;
case 896 * 1024: data |= 0x0B; break;
case 960 * 1024: data |= 0x0D; break;
}
if ( m_ram->size() > 960 * 1024 )
data |= 0x0D;
PIO_LOG(1,"PIO_C_r (hi)",("$%02x\n", data));
}
else
{
/* read lo nibble of S2 */
data = (data & 0xf0) | (ioport("DSW0")->read() & 0x0f);
PIO_LOG(1,"PIO_C_r (lo)",("$%02x\n", data));
}
if ( ! ( m_ppi_portb & 0x08 ) )
{
double tap_val = m_cassette->input();
if ( tap_val < 0 )
{
data &= ~0x10;
}
else
{
data |= 0x10;
}
}
else
{
if ( m_ppi_portb & 0x01 )
{
data = ( data & ~0x10 ) | ( m_pit_out2 ? 0x10 : 0x00 );
}
}
data = ( data & ~0x20 ) | ( m_pit_out2 ? 0x20 : 0x00 );
return data;
}
WRITE8_MEMBER( ibm5150_mb_device::pc_ppi_portb_w )
{
/* KB controller port B */
m_ppi_portb = data;
m_ppi_portc_switch_high = data & 0x08;
m_ppi_keyboard_clear = data & 0x80;
m_ppi_keyb_clock = data & 0x40;
m_pit8253->write_gate2(BIT(data, 0));
pc_speaker_set_spkrdata( data & 0x02 );
m_cassette->change_state(( data & 0x08 ) ? CASSETTE_MOTOR_DISABLED : CASSETTE_MOTOR_ENABLED,CASSETTE_MASK_MOTOR);
/* If PB7 is set clear the shift register and reset the IRQ line */
if ( m_ppi_keyboard_clear )
{
m_ppi_shift_register = 0;
m_ppi_shift_enable = 0;
m_pic8259->ir1_w(m_ppi_shift_enable);
}
m_pc_kbdc->data_write_from_mb(!m_ppi_shift_enable);
m_ppi_clock_signal = ( m_ppi_keyb_clock ) ? 1 : 0;
m_pc_kbdc->clock_write_from_mb(m_ppi_clock_signal);
}
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
const device_type EC1841_MOTHERBOARD = &device_creator<ec1841_mb_device>;
static MACHINE_CONFIG_FRAGMENT( ec1841_mb_config )
MCFG_FRAGMENT_ADD(ibm5160_mb_config)
MCFG_DEVICE_MODIFY("pc_kbdc")
MCFG_PC_KBDC_OUT_CLOCK_CB(WRITELINE(ec1841_mb_device, keyboard_clock_w))
MACHINE_CONFIG_END
//-------------------------------------------------
// machine_config_additions - device-specific
// machine configurations
//-------------------------------------------------
machine_config_constructor ec1841_mb_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME( ec1841_mb_config );
}
static INPUT_PORTS_START( ec1841_mb )
PORT_START("DSW0") /* SA1 */
PORT_DIPNAME( 0xc0, 0x40, "Number of floppy drives")
PORT_DIPSETTING( 0x00, "1" )
PORT_DIPSETTING( 0x40, "2" )
PORT_DIPSETTING( 0x80, "3" )
PORT_DIPSETTING( 0xc0, "4" )
PORT_DIPNAME( 0x30, 0x20, "Graphics adapter")
PORT_DIPSETTING( 0x00, "Reserved" )
PORT_DIPSETTING( 0x10, "Color 40x25" )
PORT_DIPSETTING( 0x20, "Color 80x25" )
PORT_DIPSETTING( 0x30, "Monochrome" )
PORT_BIT( 0x08, 0x08, IPT_UNUSED )
/* BIOS does not support booting from QD floppies */
PORT_DIPNAME( 0x04, 0x04, "Floppy type")
PORT_DIPSETTING( 0x00, "80 tracks" )
PORT_DIPSETTING( 0x04, "40 tracks" )
PORT_DIPNAME( 0x02, 0x00, "8087 installed")
PORT_DIPSETTING( 0x00, DEF_STR(No) )
PORT_DIPSETTING( 0x02, DEF_STR(Yes) )
PORT_DIPNAME( 0x01, 0x01, "Boot from floppy")
PORT_DIPSETTING( 0x01, DEF_STR(Yes) )
PORT_DIPSETTING( 0x00, DEF_STR(No) )
PORT_START("SA2")
PORT_DIPNAME( 0x04, 0x04, "Speech synthesizer")
PORT_DIPSETTING( 0x00, "Installed" )
PORT_DIPSETTING( 0x04, "Not installed" )
INPUT_PORTS_END
//-------------------------------------------------
// input_ports - device-specific input ports
//-------------------------------------------------
ioport_constructor ec1841_mb_device::device_input_ports() const
{
return INPUT_PORTS_NAME( ec1841_mb );
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// ec1841_mb_device - constructor
//-------------------------------------------------
ec1841_mb_device::ec1841_mb_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: ibm5160_mb_device(mconfig, tag, owner, clock)
{
}
void ec1841_mb_device::device_start()
{
ibm5160_mb_device::device_start();
}
void ec1841_mb_device::device_reset()
{
ibm5160_mb_device::device_reset();
}
// kbd interface is 5150-like but PB2 controls access to second bank of DIP switches (SA2).
WRITE8_MEMBER( ec1841_mb_device::pc_ppi_portb_w )
{
/* KB controller port B */
m_ppi_portb = data;
m_ppi_portc_switch_high = data & 0x04;
m_ppi_keyboard_clear = data & 0x80;
m_ppi_keyb_clock = data & 0x40;
m_pit8253->write_gate2(BIT(data, 0));
pc_speaker_set_spkrdata( data & 0x02 );
/* If PB7 is set clear the shift register and reset the IRQ line */
if ( m_ppi_keyboard_clear )
{
m_ppi_shift_register = 0;
m_ppi_shift_enable = 0;
m_pic8259->ir1_w(m_ppi_shift_enable);
}
m_pc_kbdc->data_write_from_mb(!m_ppi_shift_enable);
m_ppi_clock_signal = ( m_ppi_keyb_clock ) ? 1 : 0;
m_pc_kbdc->clock_write_from_mb(m_ppi_clock_signal);
}
READ8_MEMBER ( ec1841_mb_device::pc_ppi_portc_r )
{
int data=0xff;
data&=~0x80; // no parity error
data&=~0x40; // no error on expansion board
if (m_ppi_portc_switch_high)
{
data = (data & 0xf0) | (ioport("SA2")->read() & 0x0f);
}
data = ( data & ~0x20 ) | ( m_pit_out2 ? 0x20 : 0x00 );
return data;
}
pc_noppi_mb_device::pc_noppi_mb_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
: ibm5160_mb_device(mconfig, tag, owner, clock)
{
}
//**************************************************************************
// DEVICE CONFIGURATION
//**************************************************************************
static MACHINE_CONFIG_FRAGMENT( pc_noppi_mb_config )
MCFG_FRAGMENT_ADD(ibm5160_mb_config)
MCFG_DEVICE_REMOVE("pc_kbdc")
MCFG_DEVICE_REMOVE("ppi8255")
MACHINE_CONFIG_END
static INPUT_PORTS_START( pc_noppi_mb )
INPUT_PORTS_END
//-------------------------------------------------
// machine_config_additions - device-specific
// machine configurations
//-------------------------------------------------
machine_config_constructor pc_noppi_mb_device::device_mconfig_additions() const
{
return MACHINE_CONFIG_NAME( pc_noppi_mb_config );
}
ioport_constructor pc_noppi_mb_device::device_input_ports() const
{
return INPUT_PORTS_NAME( pc_noppi_mb );
}
void pc_noppi_mb_device::device_start()
{
install_device(0x0000, 0x000f, 0, 0, read8_delegate(FUNC(am9517a_device::read), (am9517a_device*)m_dma8237), write8_delegate(FUNC(am9517a_device::write), (am9517a_device*)m_dma8237) );
install_device(0x0020, 0x0021, 0, 0, read8_delegate(FUNC(pic8259_device::read), (pic8259_device*)m_pic8259), write8_delegate(FUNC(pic8259_device::write), (pic8259_device*)m_pic8259) );
install_device(0x0040, 0x0043, 0, 0, read8_delegate(FUNC(pit8253_device::read), (pit8253_device*)m_pit8253), write8_delegate(FUNC(pit8253_device::write), (pit8253_device*)m_pit8253) );
install_device(0x0080, 0x0087, 0, 0, read8_delegate(FUNC(ibm5160_mb_device::pc_page_r), this), write8_delegate(FUNC(ibm5160_mb_device::pc_page_w),this) );
install_device(0x00a0, 0x00a1, 0, 0, read8_delegate(), write8_delegate(FUNC(ibm5160_mb_device::nmi_enable_w),this));
/* MESS managed RAM */
if ( m_ram->pointer() )
membank( "bank10" )->set_base( m_ram->pointer() );
}
const device_type PCNOPPI_MOTHERBOARD = &device_creator<pc_noppi_mb_device>;
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