diff options
Diffstat (limited to 'src/mame/machine/at.cpp')
-rw-r--r-- | src/mame/machine/at.cpp | 429 |
1 files changed, 0 insertions, 429 deletions
diff --git a/src/mame/machine/at.cpp b/src/mame/machine/at.cpp deleted file mode 100644 index 3c224b77370..00000000000 --- a/src/mame/machine/at.cpp +++ /dev/null @@ -1,429 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Wilbert Pol, Miodrag Milanovic, Carl -/*************************************************************************** - - IBM AT Compatibles - -***************************************************************************/ - -#include "emu.h" -#include "machine/at.h" -#include "cpu/i86/i286.h" -#include "cpu/i386/i386.h" -#include "machine/at_keybc.h" -#include "bus/pc_kbd/pc_kbdc.h" -#include "softlist_dev.h" -#include "speaker.h" - -#define LOG_PORT80 0 - -DEFINE_DEVICE_TYPE(AT_MB, at_mb_device, "at_mb", "PC/AT Motherboard") - -at_mb_device::at_mb_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : - device_t(mconfig, AT_MB, tag, owner, clock), - m_maincpu(*this, ":maincpu"), - m_isabus(*this, "isabus"), - m_pic8259_slave(*this, "pic8259_slave"), - m_dma8237_1(*this, "dma8237_1"), - m_dma8237_2(*this, "dma8237_2"), - m_pit8254(*this, "pit8254"), - m_speaker(*this, "speaker"), - m_mc146818(*this, "rtc") -{ -} - -void at_mb_device::device_reset() -{ - m_at_spkrdata = 0; - m_pit_out2 = 1; - m_dma_channel = -1; - m_cur_eop = false; -} - -void at_mb_device::device_start() -{ - if(!strncmp(m_maincpu->shortname(), "i80286", 6)) - downcast<i80286_cpu_device *>(m_maincpu.target())->set_a20_callback(i80286_cpu_device::a20_cb(&at_mb_device::a20_286, this)); -} - -void at_mb_device::at_softlists(machine_config &config) -{ - /* software lists */ - SOFTWARE_LIST(config, "pc_disk_list").set_original("ibm5150"); - SOFTWARE_LIST(config, "at_disk_list").set_original("ibm5170"); - SOFTWARE_LIST(config, "at_cdrom_list").set_original("ibm5170_cdrom"); - SOFTWARE_LIST(config, "midi_disk_list").set_compatible("midi_flop"); -} - -void at_mb_device::device_add_mconfig(machine_config &config) -{ - PIT8254(config, m_pit8254, 0); - m_pit8254->set_clk<0>(4772720/4); /* heartbeat IRQ */ - m_pit8254->out_handler<0>().set("pic8259_master", FUNC(pic8259_device::ir0_w)); - m_pit8254->set_clk<1>(4772720/4); /* dram refresh */ - m_pit8254->set_clk<2>(4772720/4); /* pio port c pin 4, and speaker polling enough */ - m_pit8254->out_handler<2>().set(FUNC(at_mb_device::pit8254_out2_changed)); - - AM9517A(config, m_dma8237_1, 14.318181_MHz_XTAL / 3); - m_dma8237_1->out_hreq_callback().set(m_dma8237_2, FUNC(am9517a_device::dreq0_w)); - m_dma8237_1->out_eop_callback().set(FUNC(at_mb_device::dma8237_out_eop)); - m_dma8237_1->in_memr_callback().set(FUNC(at_mb_device::dma_read_byte)); - m_dma8237_1->out_memw_callback().set(FUNC(at_mb_device::dma_write_byte)); - m_dma8237_1->in_ior_callback<0>().set(FUNC(at_mb_device::dma8237_0_dack_r)); - m_dma8237_1->in_ior_callback<1>().set(FUNC(at_mb_device::dma8237_1_dack_r)); - m_dma8237_1->in_ior_callback<2>().set(FUNC(at_mb_device::dma8237_2_dack_r)); - m_dma8237_1->in_ior_callback<3>().set(FUNC(at_mb_device::dma8237_3_dack_r)); - m_dma8237_1->out_iow_callback<0>().set(FUNC(at_mb_device::dma8237_0_dack_w)); - m_dma8237_1->out_iow_callback<1>().set(FUNC(at_mb_device::dma8237_1_dack_w)); - m_dma8237_1->out_iow_callback<2>().set(FUNC(at_mb_device::dma8237_2_dack_w)); - m_dma8237_1->out_iow_callback<3>().set(FUNC(at_mb_device::dma8237_3_dack_w)); - m_dma8237_1->out_dack_callback<0>().set(FUNC(at_mb_device::dack0_w)); - m_dma8237_1->out_dack_callback<1>().set(FUNC(at_mb_device::dack1_w)); - m_dma8237_1->out_dack_callback<2>().set(FUNC(at_mb_device::dack2_w)); - m_dma8237_1->out_dack_callback<3>().set(FUNC(at_mb_device::dack3_w)); - - AM9517A(config, m_dma8237_2, 14.318181_MHz_XTAL / 3); - m_dma8237_2->out_hreq_callback().set(FUNC(at_mb_device::dma_hrq_changed)); - m_dma8237_2->out_eop_callback().set(FUNC(at_mb_device::dma8237_2_out_eop)); - m_dma8237_2->in_memr_callback().set(FUNC(at_mb_device::dma_read_word)); - m_dma8237_2->out_memw_callback().set(FUNC(at_mb_device::dma_write_word)); - m_dma8237_2->in_ior_callback<1>().set(FUNC(at_mb_device::dma8237_5_dack_r)); - m_dma8237_2->in_ior_callback<2>().set(FUNC(at_mb_device::dma8237_6_dack_r)); - m_dma8237_2->in_ior_callback<3>().set(FUNC(at_mb_device::dma8237_7_dack_r)); - m_dma8237_2->out_iow_callback<1>().set(FUNC(at_mb_device::dma8237_5_dack_w)); - m_dma8237_2->out_iow_callback<2>().set(FUNC(at_mb_device::dma8237_6_dack_w)); - m_dma8237_2->out_iow_callback<3>().set(FUNC(at_mb_device::dma8237_7_dack_w)); - m_dma8237_2->out_dack_callback<0>().set(FUNC(at_mb_device::dack4_w)); - m_dma8237_2->out_dack_callback<1>().set(FUNC(at_mb_device::dack5_w)); - m_dma8237_2->out_dack_callback<2>().set(FUNC(at_mb_device::dack6_w)); - m_dma8237_2->out_dack_callback<3>().set(FUNC(at_mb_device::dack7_w)); - - pic8259_device &pic8259_master(PIC8259(config, "pic8259_master", 0)); - pic8259_master.out_int_callback().set_inputline(":maincpu", 0); - pic8259_master.in_sp_callback().set_constant(1); - pic8259_master.read_slave_ack_callback().set(FUNC(at_mb_device::get_slave_ack)); - - PIC8259(config, m_pic8259_slave, 0); - m_pic8259_slave->out_int_callback().set("pic8259_master", FUNC(pic8259_device::ir2_w)); - m_pic8259_slave->in_sp_callback().set_constant(0); - - ISA16(config, m_isabus, 0); - m_isabus->set_memspace(":maincpu", AS_PROGRAM); - m_isabus->set_iospace(":maincpu", AS_IO); - m_isabus->irq2_callback().set(m_pic8259_slave, FUNC(pic8259_device::ir2_w)); // in place of irq 2 on at irq 9 is used - m_isabus->irq3_callback().set("pic8259_master", FUNC(pic8259_device::ir3_w)); - m_isabus->irq4_callback().set("pic8259_master", FUNC(pic8259_device::ir4_w)); - m_isabus->irq5_callback().set("pic8259_master", FUNC(pic8259_device::ir5_w)); - m_isabus->irq6_callback().set("pic8259_master", FUNC(pic8259_device::ir6_w)); - m_isabus->irq7_callback().set("pic8259_master", FUNC(pic8259_device::ir7_w)); - m_isabus->irq10_callback().set(m_pic8259_slave, FUNC(pic8259_device::ir3_w)); - m_isabus->irq11_callback().set(m_pic8259_slave, FUNC(pic8259_device::ir4_w)); - m_isabus->irq12_callback().set(m_pic8259_slave, FUNC(pic8259_device::ir5_w)); - m_isabus->irq14_callback().set(m_pic8259_slave, FUNC(pic8259_device::ir6_w)); - m_isabus->irq15_callback().set(m_pic8259_slave, FUNC(pic8259_device::ir7_w)); - m_isabus->drq0_callback().set(m_dma8237_1, FUNC(am9517a_device::dreq0_w)); - m_isabus->drq1_callback().set(m_dma8237_1, FUNC(am9517a_device::dreq1_w)); - m_isabus->drq2_callback().set(m_dma8237_1, FUNC(am9517a_device::dreq2_w)); - m_isabus->drq3_callback().set(m_dma8237_1, FUNC(am9517a_device::dreq3_w)); - m_isabus->drq5_callback().set(m_dma8237_2, FUNC(am9517a_device::dreq1_w)); - m_isabus->drq6_callback().set(m_dma8237_2, FUNC(am9517a_device::dreq2_w)); - m_isabus->drq7_callback().set(m_dma8237_2, FUNC(am9517a_device::dreq3_w)); - m_isabus->iochck_callback().set(FUNC(at_mb_device::iochck_w)); - - MC146818(config, m_mc146818, 32.768_kHz_XTAL); - m_mc146818->irq().set(m_pic8259_slave, FUNC(pic8259_device::ir0_w)); - m_mc146818->set_century_index(0x32); - - /* sound hardware */ - SPEAKER(config, "mono").front_center(); - SPEAKER_SOUND(config, m_speaker).add_route(ALL_OUTPUTS, "mono", 0.50); - - at_keyboard_controller_device &keybc(AT_KEYBOARD_CONTROLLER(config, "keybc", 12_MHz_XTAL)); - keybc.hot_res().set_inputline(":maincpu", INPUT_LINE_RESET); - keybc.gate_a20().set_inputline(":maincpu", INPUT_LINE_A20); - keybc.kbd_irq().set("pic8259_master", FUNC(pic8259_device::ir1_w)); - keybc.kbd_clk().set("pc_kbdc", FUNC(pc_kbdc_device::clock_write_from_mb)); - keybc.kbd_data().set("pc_kbdc", FUNC(pc_kbdc_device::data_write_from_mb)); - - pc_kbdc_device &pc_kbdc(PC_KBDC(config, "pc_kbdc", 0)); - pc_kbdc.out_clock_cb().set("keybc", FUNC(at_keyboard_controller_device::kbd_clk_w)); - pc_kbdc.out_data_cb().set("keybc", FUNC(at_keyboard_controller_device::kbd_data_w)); -} - - -void at_mb_device::map(address_map &map) -{ - map(0x0000, 0x001f).rw("dma8237_1", FUNC(am9517a_device::read), FUNC(am9517a_device::write)).umask16(0xffff); - map(0x0020, 0x003f).rw("pic8259_master", FUNC(pic8259_device::read), FUNC(pic8259_device::write)).umask16(0xffff); - map(0x0040, 0x005f).rw(m_pit8254, FUNC(pit8254_device::read), FUNC(pit8254_device::write)).umask16(0xffff); - map(0x0061, 0x0061).rw(FUNC(at_mb_device::portb_r), FUNC(at_mb_device::portb_w)); - map(0x0060, 0x0060).rw("keybc", FUNC(at_keyboard_controller_device::data_r), FUNC(at_keyboard_controller_device::data_w)); - map(0x0064, 0x0064).rw("keybc", FUNC(at_keyboard_controller_device::status_r), FUNC(at_keyboard_controller_device::command_w)); - map(0x0070, 0x007f).r("rtc", FUNC(mc146818_device::read)).umask16(0xffff).w(FUNC(at_mb_device::write_rtc)).umask16(0xffff); - map(0x0080, 0x009f).rw(FUNC(at_mb_device::page8_r), FUNC(at_mb_device::page8_w)).umask16(0xffff); - map(0x00a0, 0x00bf).rw("pic8259_slave", FUNC(pic8259_device::read), FUNC(pic8259_device::write)).umask16(0xffff); - map(0x00c0, 0x00df).rw("dma8237_2", FUNC(am9517a_device::read), FUNC(am9517a_device::write)).umask16(0x00ff); -} - -/************************************************************* - * - * pic8259 configuration - * - *************************************************************/ -READ8_MEMBER( at_mb_device::get_slave_ack ) -{ - if (offset==2) // IRQ = 2 - return m_pic8259_slave->acknowledge(); - - return 0x00; -} - -/************************************************************************* - * - * PC Speaker related - * - *************************************************************************/ - -void at_mb_device::speaker_set_spkrdata(uint8_t data) -{ - m_at_spkrdata = data ? 1 : 0; - m_speaker->level_w(m_at_spkrdata & m_pit_out2); -} - - - -/************************************************************* - * - * pit8254 configuration - * - *************************************************************/ - -WRITE_LINE_MEMBER( at_mb_device::pit8254_out2_changed ) -{ - m_pit_out2 = state ? 1 : 0; - m_speaker->level_w(m_at_spkrdata & m_pit_out2); -} - - -/************************************************************************* - * - * PC DMA stuff - * - *************************************************************************/ - -READ8_MEMBER( at_mb_device::page8_r ) -{ - uint8_t data = m_at_pages[offset % 0x10]; - - switch(offset % 8) - { - case 1: - data = m_dma_offset[BIT(offset, 3)][2]; - break; - case 2: - data = m_dma_offset[BIT(offset, 3)][3]; - break; - case 3: - data = m_dma_offset[BIT(offset, 3)][1]; - break; - case 7: - data = m_dma_offset[BIT(offset, 3)][0]; - break; - } - return data; -} - - -WRITE8_MEMBER( at_mb_device::page8_w ) -{ - m_at_pages[offset % 0x10] = data; - - if (LOG_PORT80 && (offset == 0)) - { - logerror(" at_page8_w(): Port 80h <== 0x%02x (PC=0x%08x)\n", data, - (unsigned) m_maincpu->pc()); - } - - switch(offset % 8) - { - case 1: - m_dma_offset[BIT(offset, 3)][2] = data; - break; - case 2: - m_dma_offset[BIT(offset, 3)][3] = data; - break; - case 3: - m_dma_offset[BIT(offset, 3)][1] = data; - break; - case 7: - m_dma_offset[BIT(offset, 3)][0] = data; - break; - } -} - - -WRITE_LINE_MEMBER( at_mb_device::dma_hrq_changed ) -{ - m_maincpu->set_input_line(INPUT_LINE_HALT, state ? ASSERT_LINE : CLEAR_LINE); - - /* Assert HLDA */ - m_dma8237_2->hack_w(state); -} - -READ8_MEMBER(at_mb_device::dma_read_byte) -{ - address_space& prog_space = m_maincpu->space(AS_PROGRAM); // get the right address space - if(m_dma_channel == -1) - return 0xff; - uint8_t result; - offs_t page_offset = ((offs_t) m_dma_offset[0][m_dma_channel]) << 16; - - result = prog_space.read_byte(page_offset + offset); - return result; -} - - -WRITE8_MEMBER(at_mb_device::dma_write_byte) -{ - address_space& prog_space = m_maincpu->space(AS_PROGRAM); // get the right address space - if(m_dma_channel == -1) - return; - offs_t page_offset = ((offs_t) m_dma_offset[0][m_dma_channel]) << 16; - - prog_space.write_byte(page_offset + offset, data); -} - - -READ8_MEMBER(at_mb_device::dma_read_word) -{ - address_space& prog_space = m_maincpu->space(AS_PROGRAM); // get the right address space - if(m_dma_channel == -1) - return 0xff; - uint16_t result; - offs_t page_offset = ((offs_t) m_dma_offset[1][m_dma_channel & 3]) << 16; - - result = prog_space.read_word((page_offset & 0xfe0000) | (offset << 1)); - m_dma_high_byte = result & 0xFF00; - - return result & 0xFF; -} - - -WRITE8_MEMBER(at_mb_device::dma_write_word) -{ - address_space& prog_space = m_maincpu->space(AS_PROGRAM); // get the right address space - if(m_dma_channel == -1) - return; - offs_t page_offset = ((offs_t) m_dma_offset[1][m_dma_channel & 3]) << 16; - - prog_space.write_word((page_offset & 0xfe0000) | (offset << 1), m_dma_high_byte | data); -} - -READ8_MEMBER( at_mb_device::dma8237_0_dack_r ) { return m_isabus->dack_r(0); } -READ8_MEMBER( at_mb_device::dma8237_1_dack_r ) { return m_isabus->dack_r(1); } -READ8_MEMBER( at_mb_device::dma8237_2_dack_r ) { return m_isabus->dack_r(2); } -READ8_MEMBER( at_mb_device::dma8237_3_dack_r ) { return m_isabus->dack_r(3); } -READ8_MEMBER( at_mb_device::dma8237_5_dack_r ) { uint16_t ret = m_isabus->dack16_r(5); m_dma_high_byte = ret & 0xff00; return ret; } -READ8_MEMBER( at_mb_device::dma8237_6_dack_r ) { uint16_t ret = m_isabus->dack16_r(6); m_dma_high_byte = ret & 0xff00; return ret; } -READ8_MEMBER( at_mb_device::dma8237_7_dack_r ) { uint16_t ret = m_isabus->dack16_r(7); m_dma_high_byte = ret & 0xff00; return ret; } - - -WRITE8_MEMBER( at_mb_device::dma8237_0_dack_w ){ m_isabus->dack_w(0, data); } -WRITE8_MEMBER( at_mb_device::dma8237_1_dack_w ){ m_isabus->dack_w(1, data); } -WRITE8_MEMBER( at_mb_device::dma8237_2_dack_w ){ m_isabus->dack_w(2, data); } -WRITE8_MEMBER( at_mb_device::dma8237_3_dack_w ){ m_isabus->dack_w(3, data); } -WRITE8_MEMBER( at_mb_device::dma8237_5_dack_w ){ m_isabus->dack16_w(5, m_dma_high_byte | data); } -WRITE8_MEMBER( at_mb_device::dma8237_6_dack_w ){ m_isabus->dack16_w(6, m_dma_high_byte | data); } -WRITE8_MEMBER( at_mb_device::dma8237_7_dack_w ){ m_isabus->dack16_w(7, m_dma_high_byte | data); } - -WRITE_LINE_MEMBER( at_mb_device::dma8237_out_eop ) -{ - m_cur_eop = state == ASSERT_LINE; - if(m_dma_channel != -1) - m_isabus->eop_w(m_dma_channel, m_cur_eop ? ASSERT_LINE : CLEAR_LINE ); -} - -WRITE_LINE_MEMBER( at_mb_device::dma8237_2_out_eop ) -{ - m_cur_eop2 = state == ASSERT_LINE; - if(m_dma_channel != -1) - m_isabus->eop_w(m_dma_channel, m_cur_eop2 ? ASSERT_LINE : CLEAR_LINE ); -} - -void at_mb_device::set_dma_channel(int channel, int 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 ); - } -} - -WRITE8_MEMBER( at_mb_device::write_rtc ) -{ - if (offset==0) { - m_nmi_enabled = BIT(data,7); - if (!m_nmi_enabled) - m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE); - m_mc146818->write(0,data); - } - else { - m_mc146818->write(offset,data); - } -} - -uint32_t at_mb_device::a20_286(bool state) -{ - return (state ? 0xffffff : 0xefffff); -} - -WRITE_LINE_MEMBER( at_mb_device::shutdown ) -{ - if(state) - m_maincpu->reset(); -} -WRITE_LINE_MEMBER( at_mb_device::dack0_w ) { set_dma_channel(0, state); } -WRITE_LINE_MEMBER( at_mb_device::dack1_w ) { set_dma_channel(1, state); } -WRITE_LINE_MEMBER( at_mb_device::dack2_w ) { set_dma_channel(2, state); } -WRITE_LINE_MEMBER( at_mb_device::dack3_w ) { set_dma_channel(3, state); } -WRITE_LINE_MEMBER( at_mb_device::dack4_w ) { m_dma8237_1->hack_w(state ? 0 : 1); } // it's inverted -WRITE_LINE_MEMBER( at_mb_device::dack5_w ) { set_dma_channel(5, state); } -WRITE_LINE_MEMBER( at_mb_device::dack6_w ) { set_dma_channel(6, state); } -WRITE_LINE_MEMBER( at_mb_device::dack7_w ) { set_dma_channel(7, state); } - -READ8_MEMBER( at_mb_device::portb_r ) -{ - uint8_t data = m_at_speaker; - data &= ~0xd0; /* AT BIOS don't likes this being set */ - - /* 0x10 is the dram refresh line bit, 15.085us. */ - data |= (machine().time().as_ticks(110000) & 1) ? 0x10 : 0; - - if (m_pit_out2) - data |= 0x20; - else - data &= ~0x20; /* ps2m30 wants this */ - - return data; -} - -WRITE8_MEMBER( at_mb_device::portb_w ) -{ - m_at_speaker = data; - m_pit8254->write_gate2(BIT(data, 0)); - speaker_set_spkrdata( BIT(data, 1)); - m_channel_check = BIT(data, 3); - if (m_channel_check) - m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE); -} - -WRITE_LINE_MEMBER( at_mb_device::iochck_w ) -{ - if (!state && m_nmi_enabled && !m_channel_check) - m_maincpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE); -} |