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author | 2016-03-12 12:31:13 +0100 | |
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committer | 2016-03-12 12:31:13 +0100 | |
commit | a026a582f1a0ea8c1ede3acaddacef506ef3f3b0 (patch) | |
tree | e31573822f2359677de519f9f3b600d98e8764cd /src/devices/machine/genpc.cpp | |
parent | 477d2abd43984f076b7e45f5527591fa8fd0d241 (diff) | |
parent | dcab55bf53b94713a6f72e9633f5101c8dd6c08c (diff) |
Merge pull request #15 from mamedev/master
Sync to base master
Diffstat (limited to 'src/devices/machine/genpc.cpp')
-rw-r--r-- | src/devices/machine/genpc.cpp | 921 |
1 files changed, 921 insertions, 0 deletions
diff --git a/src/devices/machine/genpc.cpp b/src/devices/machine/genpc.cpp new file mode 100644 index 00000000000..a363c0d75aa --- /dev/null +++ b/src/devices/machine/genpc.cpp @@ -0,0 +1,921 @@ +// license:BSD-3-Clause +// copyright-holders:Wilbert Pol, Miodrag Milanovic +/*************************************************************************** + + machine/genpc.c + + +***************************************************************************/ + +#include "emu.h" +#include "machine/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 + * + *************************************************************************/ + +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) +{ +} + +DEVICE_ADDRESS_MAP_START( map, 8, ibm5160_mb_device ) + AM_RANGE(0x0000, 0x000f) AM_DEVREADWRITE("dma8237", am9517a_device, read, write) + AM_RANGE(0x0020, 0x002f) AM_DEVREADWRITE("pic8259", pic8259_device, read, write) + AM_RANGE(0x0040, 0x004f) AM_DEVREADWRITE("pit8253", pit8253_device, read, write) + AM_RANGE(0x0060, 0x006f) AM_DEVREADWRITE("ppi8255", i8255_device, read, write) + AM_RANGE(0x0080, 0x008f) AM_WRITE(pc_page_w) + AM_RANGE(0x00a0, 0x00a1) AM_WRITE(nmi_enable_w) +ADDRESS_MAP_END + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void ibm5160_mb_device::device_start() +{ + if(!m_ram->started()) + throw device_missing_dependencies(); + m_maincpu->space(AS_PROGRAM).install_ram(0, m_ram->size() - 1, 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 = 1; + 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 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_DEVICE_MODIFY("ppi8255") + MCFG_I8255_OUT_PORTB_CB(WRITE8(ibm5150_mb_device, pc_ppi_portb_w)) + MCFG_I8255_IN_PORTC_CB(READ8(ibm5150_mb_device, pc_ppi_portc_r)) + + MCFG_CASSETTE_ADD( "cassette" ) + MCFG_CASSETTE_DEFAULT_STATE(CASSETTE_PLAY | CASSETTE_MOTOR_DISABLED | CASSETTE_SPEAKER_ENABLED) +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") +{ +} + +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("ppi8255") + MCFG_I8255_OUT_PORTB_CB(WRITE8(ec1841_mb_device, pc_ppi_portb_w)) + MCFG_I8255_IN_PORTC_CB(READ8(ec1841_mb_device, pc_ppi_portc_r)) + + 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() +{ +} + +// 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 ); +} + +DEVICE_ADDRESS_MAP_START( map, 8, pc_noppi_mb_device ) + AM_RANGE(0x0000, 0x000f) AM_DEVREADWRITE("dma8237", am9517a_device, read, write) + AM_RANGE(0x0020, 0x002f) AM_DEVREADWRITE("pic8259", pic8259_device, read, write) + AM_RANGE(0x0040, 0x004f) AM_DEVREADWRITE("pit8253", pit8253_device, read, write) + AM_RANGE(0x0080, 0x008f) AM_WRITE(pc_page_w) + AM_RANGE(0x00a0, 0x00a1) AM_WRITE(nmi_enable_w) +ADDRESS_MAP_END + +const device_type PCNOPPI_MOTHERBOARD = &device_creator<pc_noppi_mb_device>; |