diff options
author | 2015-11-08 12:56:12 +0100 | |
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committer | 2015-11-08 12:56:12 +0100 | |
commit | 7c19aac60e12d6f5ea301bdb34d7826a01e0b06f (patch) | |
tree | f310d86aa2c6bfc19d115307dedde4eb0cd52dad /src/devices/machine/wd7600.c | |
parent | a57b46ae933badd7441ce1644711dbb851e2b504 (diff) |
Rename *.c -> *.cpp in our source (nw)
Diffstat (limited to 'src/devices/machine/wd7600.c')
-rw-r--r-- | src/devices/machine/wd7600.c | 557 |
1 files changed, 0 insertions, 557 deletions
diff --git a/src/devices/machine/wd7600.c b/src/devices/machine/wd7600.c deleted file mode 100644 index 26873553e14..00000000000 --- a/src/devices/machine/wd7600.c +++ /dev/null @@ -1,557 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Barry Rodewald -/* - * Western Digital WD7600 PC system chipset - * - * WD76C10 - system control - * WD76C20 - FDC, RTC, Bus interface - * WD76C30 - 1 parallel and 2 serial ports - * - * Created on: 5/05/2014 - * - * TODO: pretty much everything - */ - -#include "machine/wd7600.h" - -const device_type WD7600 = &device_creator<wd7600_device>; - -#define LOG (1) - -static MACHINE_CONFIG_FRAGMENT( wd7600 ) - MCFG_DEVICE_ADD("dma1", AM9517A, 0) - MCFG_I8237_OUT_HREQ_CB(DEVWRITELINE("dma2", am9517a_device, dreq0_w)) - MCFG_I8237_OUT_EOP_CB(WRITELINE(wd7600_device, dma1_eop_w)) - MCFG_I8237_IN_MEMR_CB(READ8(wd7600_device, dma_read_byte)) - MCFG_I8237_OUT_MEMW_CB(WRITE8(wd7600_device, dma_write_byte)) - MCFG_I8237_IN_IOR_0_CB(READ8(wd7600_device, dma1_ior0_r)) - MCFG_I8237_IN_IOR_1_CB(READ8(wd7600_device, dma1_ior1_r)) - MCFG_I8237_IN_IOR_2_CB(READ8(wd7600_device, dma1_ior2_r)) - MCFG_I8237_IN_IOR_3_CB(READ8(wd7600_device, dma1_ior3_r)) - MCFG_I8237_OUT_IOW_0_CB(WRITE8(wd7600_device, dma1_iow0_w)) - MCFG_I8237_OUT_IOW_1_CB(WRITE8(wd7600_device, dma1_iow1_w)) - MCFG_I8237_OUT_IOW_2_CB(WRITE8(wd7600_device, dma1_iow2_w)) - MCFG_I8237_OUT_IOW_3_CB(WRITE8(wd7600_device, dma1_iow3_w)) - MCFG_I8237_OUT_DACK_0_CB(WRITELINE(wd7600_device, dma1_dack0_w)) - MCFG_I8237_OUT_DACK_1_CB(WRITELINE(wd7600_device, dma1_dack1_w)) - MCFG_I8237_OUT_DACK_2_CB(WRITELINE(wd7600_device, dma1_dack2_w)) - MCFG_I8237_OUT_DACK_3_CB(WRITELINE(wd7600_device, dma1_dack3_w)) - MCFG_DEVICE_ADD("dma2", AM9517A, 0) - MCFG_I8237_OUT_HREQ_CB(WRITELINE(wd7600_device, dma2_hreq_w)) - MCFG_I8237_IN_MEMR_CB(READ8(wd7600_device, dma_read_word)) - MCFG_I8237_OUT_MEMW_CB(WRITE8(wd7600_device, dma_write_word)) - MCFG_I8237_IN_IOR_1_CB(READ8(wd7600_device, dma2_ior1_r)) - MCFG_I8237_IN_IOR_2_CB(READ8(wd7600_device, dma2_ior2_r)) - MCFG_I8237_IN_IOR_3_CB(READ8(wd7600_device, dma2_ior3_r)) - MCFG_I8237_OUT_IOW_1_CB(WRITE8(wd7600_device, dma2_iow1_w)) - MCFG_I8237_OUT_IOW_2_CB(WRITE8(wd7600_device, dma2_iow2_w)) - MCFG_I8237_OUT_IOW_3_CB(WRITE8(wd7600_device, dma2_iow3_w)) - MCFG_I8237_OUT_DACK_0_CB(WRITELINE(wd7600_device, dma2_dack0_w)) - MCFG_I8237_OUT_DACK_1_CB(WRITELINE(wd7600_device, dma2_dack1_w)) - MCFG_I8237_OUT_DACK_2_CB(WRITELINE(wd7600_device, dma2_dack2_w)) - MCFG_I8237_OUT_DACK_3_CB(WRITELINE(wd7600_device, dma2_dack3_w)) - MCFG_PIC8259_ADD("intc1", WRITELINE(wd7600_device, pic1_int_w), VCC, READ8(wd7600_device, pic1_slave_ack_r)) - MCFG_PIC8259_ADD("intc2", DEVWRITELINE("intc1", pic8259_device, ir2_w), GND, NULL) - - MCFG_DEVICE_ADD("ctc", PIT8254, 0) - MCFG_PIT8253_CLK0(XTAL_14_31818MHz / 12) - MCFG_PIT8253_OUT0_HANDLER(DEVWRITELINE("intc1", pic8259_device, ir0_w)) - MCFG_PIT8253_CLK1(XTAL_14_31818MHz / 12) - MCFG_PIT8253_OUT1_HANDLER(WRITELINE(wd7600_device, ctc_out1_w)) - MCFG_PIT8253_CLK2(XTAL_14_31818MHz / 12) - MCFG_PIT8253_OUT2_HANDLER(WRITELINE(wd7600_device, ctc_out2_w)) - - MCFG_DS12885_ADD("rtc") - MCFG_MC146818_IRQ_HANDLER(WRITELINE(wd7600_device, rtc_irq_w)) - MCFG_MC146818_CENTURY_INDEX(0x32) -MACHINE_CONFIG_END - -machine_config_constructor wd7600_device::device_mconfig_additions() const -{ - return MACHINE_CONFIG_NAME( wd7600 ); -} - -void wd7600_device::static_set_cputag(device_t &device, const char *tag) -{ - wd7600_device &chip = downcast<wd7600_device &>(device); - chip.m_cputag = tag; -} - -void wd7600_device::static_set_isatag(device_t &device, const char *tag) -{ - wd7600_device &chip = downcast<wd7600_device &>(device); - chip.m_isatag = tag; -} - -void wd7600_device::static_set_biostag(device_t &device, const char *tag) -{ - wd7600_device &chip = downcast<wd7600_device &>(device); - chip.m_biostag = tag; -} - -void wd7600_device::static_set_keybctag(device_t &device, const char *tag) -{ - wd7600_device &chip = downcast<wd7600_device &>(device); - chip.m_keybctag = tag; -} - -wd7600_device::wd7600_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : - device_t(mconfig, WD7600, "WD 7600 chipset", tag, owner, clock, "wd7600", __FILE__), - m_read_ior(*this), - m_write_iow(*this), - m_write_tc(*this), - m_write_hold(*this), - m_write_nmi(*this), - m_write_intr(*this), - m_write_cpureset(*this), - m_write_a20m(*this), - m_write_spkr(*this), - m_dma1(*this, "dma1"), - m_dma2(*this, "dma2"), - m_pic1(*this, "intc1"), - m_pic2(*this, "intc2"), - m_ctc(*this, "ctc"), - m_rtc(*this, "rtc"), - m_portb(0x0f), - m_iochck(1), - m_nmi_mask(1), - m_alt_a20(0), - m_ext_gatea20(0), - m_kbrst(1), - m_refresh_toggle(0), - m_dma_eop(0), - m_dma_high_byte(0xff), - m_dma_channel(-1) - {} - - -void wd7600_device::device_start() -{ - ram_device *ram_dev = machine().device<ram_device>(RAM_TAG); - - // make sure the ram device is already running - if (!ram_dev->started()) - throw device_missing_dependencies(); - - // resolve callbacks - m_read_ior.resolve_safe(0); - m_write_iow.resolve_safe(); - m_write_tc.resolve_safe(); - m_write_hold.resolve_safe(); - m_write_nmi.resolve_safe(); - m_write_intr.resolve_safe(); - m_write_cpureset.resolve_safe(); - m_write_a20m.resolve_safe(); - m_write_spkr.resolve_safe(); - - device_t *cpu = machine().device(m_cputag); - m_space = &cpu->memory().space(AS_PROGRAM); - m_space_io = &cpu->memory().space(AS_IO); - - m_isa = machine().root_device().memregion(m_isatag)->base(); - m_bios = machine().root_device().memregion(m_biostag)->base(); - m_keybc = downcast<at_keyboard_controller_device *>(machine().device(m_keybctag)); - - m_ram = ram_dev->pointer(); - UINT32 ram_size = ram_dev->size(); - - // install base memory - m_space->install_ram(0x000000, 0x09ffff, m_ram); - m_space->install_ram(0x0d0000, 0x0effff, m_ram + 0xd0000); - - // install extended memory - if (ram_size > 0x100000) - m_space->install_ram(0x100000, ram_size - 1, m_ram + 0x100000); - - // install video BIOS (we should use the VGA BIOS at the beginning of the system BIOS ROM, but that gives a - // blank display (but still runs)) - //m_space->install_rom(0x000c0000, 0x000cffff, m_bios + 0xe0000); - m_space->install_rom(0x000c0000, 0x000cffff, m_isa); - - // install BIOS ROM at cpu inital pc - m_space->install_rom(0x000f0000, 0x000fffff, m_bios + 0xf0000); - m_space->install_rom(0xffff0000, 0xffffffff, m_bios + 0xf0000); - - // install i/o accesses - m_space_io->install_readwrite_handler(0x0000, 0x000f, read8_delegate(FUNC(am9517a_device::read), &(*m_dma1)), write8_delegate(FUNC(am9517a_device::write), &(*m_dma1)), 0xffffffff); - m_space_io->install_readwrite_handler(0x0020, 0x003f, read8_delegate(FUNC(pic8259_device::read), &(*m_pic1)), write8_delegate(FUNC(pic8259_device::write), &(*m_pic1)), 0x0000ffff); - m_space_io->install_readwrite_handler(0x0040, 0x0043, read8_delegate(FUNC(pit8254_device::read), &(*m_ctc)), write8_delegate(FUNC(pit8254_device::write), &(*m_ctc)), 0xffffffff); - m_space_io->install_readwrite_handler(0x0060, 0x0063, read8_delegate(FUNC(wd7600_device::keyb_data_r), this), write8_delegate(FUNC(wd7600_device::keyb_data_w), this), 0x000000ff); - m_space_io->install_readwrite_handler(0x0060, 0x0063, read8_delegate(FUNC(wd7600_device::portb_r), this), write8_delegate(FUNC(wd7600_device::portb_w), this), 0x0000ff00); - m_space_io->install_readwrite_handler(0x0064, 0x0067, read8_delegate(FUNC(wd7600_device::keyb_status_r), this), write8_delegate(FUNC(wd7600_device::keyb_cmd_w), this), 0x000000ff); - m_space_io->install_readwrite_handler(0x0070, 0x007f, read8_delegate(FUNC(mc146818_device::read), &(*m_rtc)), write8_delegate(FUNC(wd7600_device::rtc_w), this), 0x0000ffff); - m_space_io->install_readwrite_handler(0x0080, 0x009f, read8_delegate(FUNC(wd7600_device::dma_page_r), this), write8_delegate(FUNC(wd7600_device::dma_page_w), this), 0xffffffff); - m_space_io->install_readwrite_handler(0x0090, 0x0093, read8_delegate(FUNC(wd7600_device::a20_reset_r), this), write8_delegate(FUNC(wd7600_device::a20_reset_w), this), 0x00ff0000); - m_space_io->install_readwrite_handler(0x00a0, 0x00a3, read8_delegate(FUNC(pic8259_device::read), &(*m_pic2)), write8_delegate(FUNC(pic8259_device::write), &(*m_pic2)), 0x0000ffff); - m_space_io->install_readwrite_handler(0x00c0, 0x00df, read8_delegate(FUNC(am9517a_device::read), &(*m_dma2)), write8_delegate(FUNC(am9517a_device::write), &(*m_dma2)), 0x00ff00ff); - m_space_io->install_readwrite_handler(0x2070, 0x2073, read16_delegate(FUNC(wd7600_device::refresh_r), this), write16_delegate(FUNC(wd7600_device::refresh_w), this), 0xffff0000); - m_space_io->install_readwrite_handler(0x2870, 0x2873, read16_delegate(FUNC(wd7600_device::chipsel_r), this), write16_delegate(FUNC(wd7600_device::chipsel_w), this), 0xffff0000); - m_space_io->install_readwrite_handler(0x3870, 0x3873, read16_delegate(FUNC(wd7600_device::mem_ctrl_r), this), write16_delegate(FUNC(wd7600_device::mem_ctrl_w), this), 0xffff0000); - m_space_io->install_readwrite_handler(0x4870, 0x4873, read16_delegate(FUNC(wd7600_device::bank_01_start_r), this), write16_delegate(FUNC(wd7600_device::bank_01_start_w), this), 0xffff0000); - m_space_io->install_readwrite_handler(0x5070, 0x5073, read16_delegate(FUNC(wd7600_device::bank_23_start_r), this), write16_delegate(FUNC(wd7600_device::bank_23_start_w), this), 0xffff0000); - m_space_io->install_readwrite_handler(0x5870, 0x5873, read16_delegate(FUNC(wd7600_device::split_addr_r), this), write16_delegate(FUNC(wd7600_device::split_addr_w), this), 0xffff0000); - m_space_io->install_readwrite_handler(0x9870, 0x9873, read16_delegate(FUNC(wd7600_device::diag_r), this), write16_delegate(FUNC(wd7600_device::diag_w), this), 0xffff0000); -} - -void wd7600_device::device_reset() -{ - m_split_start = 0; - m_chip_sel = 0; - m_refresh_ctrl = 0; - m_memory_ctrl = 0; - m_diagnostic = 0xe080; - - for(int x=0;x<4;x++) - m_bank_start[x] = 0; - - // initialize dma controller clocks - m_dma1->set_unscaled_clock(clock()); - m_dma2->set_unscaled_clock(clock()); -} - - -WRITE_LINE_MEMBER( wd7600_device::iochck_w ) -{ - if (BIT(m_portb, 3) == 0) - { - if (m_iochck && state == 0) - { - // set channel check latch - m_portb |= 1 << 6; - nmi(); - } - - m_iochck = state; - } -} - -void wd7600_device::nmi() -{ - if (m_nmi_mask & BIT(m_portb, 6)) - { - m_write_nmi(1); - m_write_nmi(0); - } -} - -void wd7600_device::a20m() -{ - // TODO: ignore keyboard A20 signal if set in Diagnostic register (0x9872) - m_write_a20m(m_alt_a20 | m_ext_gatea20); -} - -void wd7600_device::keyboard_gatea20(int state) -{ - m_ext_gatea20 = state; - a20m(); -} - -WRITE8_MEMBER( wd7600_device::rtc_w ) -{ - if (offset == 0) - { - m_nmi_mask = !BIT(data, 7); - data &= 0x7f; - } - - m_rtc->write(space, offset, data); -} - -WRITE_LINE_MEMBER( wd7600_device::rtc_irq_w ) -{ - m_pic2->ir0_w(state ? 0 : 1); // inverted? -} - -READ8_MEMBER( wd7600_device::pic1_slave_ack_r ) -{ - if (offset == 2) // IRQ 2 - return m_pic2->acknowledge(); - - return 0x00; -} - -// Timer outputs -WRITE_LINE_MEMBER( wd7600_device::ctc_out1_w ) -{ - m_refresh_toggle ^= state; - m_portb = (m_portb & 0xef) | (m_refresh_toggle << 4); -} - -WRITE_LINE_MEMBER( wd7600_device::ctc_out2_w ) -{ - m_write_spkr(!(state)); - m_portb = (m_portb & 0xdf) | (state << 5); -} - -// Keyboard -WRITE8_MEMBER( wd7600_device::keyb_data_w ) -{ -// if(LOG) logerror("WD7600 '%s': keyboard data write %02x\n", tag(), data); - m_keybc->data_w(space,0,data); -} - -READ8_MEMBER( wd7600_device::keyb_data_r ) -{ - UINT8 ret = m_keybc->data_r(space,0); -// if(LOG) logerror("WD7600 '%s': keyboard data read %02x\n", tag(), ret); - return ret; -} - -WRITE8_MEMBER( wd7600_device::keyb_cmd_w ) -{ -// if(LOG) logerror("WD7600 '%s': keyboard command %02x\n", tag(), data); - m_keybc->command_w(space,0,data); -} - -READ8_MEMBER( wd7600_device::keyb_status_r ) -{ - return m_keybc->status_r(space,0); -} - -READ8_MEMBER( wd7600_device::portb_r ) -{ - return m_portb; -} - -WRITE8_MEMBER( wd7600_device::portb_w ) -{ - m_portb = (m_portb & 0xf0) | (data & 0x0f); - - // bit 5 forced to 1 if timer disabled - if (!BIT(m_portb, 0)) - m_portb |= 1 << 5; - - m_ctc->write_gate2(BIT(m_portb, 0)); - - m_write_spkr(!BIT(m_portb, 1)); - - // clear channel check latch? - if (BIT(m_portb, 3)) - m_portb &= 0xbf; -} - -// DMA controllers -offs_t wd7600_device::page_offset() -{ - switch (m_dma_channel) - { - case 0: return (offs_t) m_dma_page[0x07] << 16; - case 1: return (offs_t) m_dma_page[0x03] << 16; - case 2: return (offs_t) m_dma_page[0x01] << 16; - case 3: return (offs_t) m_dma_page[0x02] << 16; - case 5: return (offs_t) m_dma_page[0x0b] << 16; - case 6: return (offs_t) m_dma_page[0x09] << 16; - case 7: return (offs_t) m_dma_page[0x0a] << 16; - } - - // should never get here - return 0xff0000; -} - -READ8_MEMBER( wd7600_device::dma_read_byte ) -{ - if (m_dma_channel == -1) - return 0xff; - - return m_space->read_byte(page_offset() + offset); -} - -WRITE8_MEMBER( wd7600_device::dma_write_byte ) -{ - if (m_dma_channel == -1) - return; - - m_space->write_byte(page_offset() + offset, data); -} - -READ8_MEMBER( wd7600_device::dma_read_word ) -{ - if (m_dma_channel == -1) - return 0xff; - - UINT16 result = m_space->read_word(page_offset() + (offset << 1)); - m_dma_high_byte = result >> 8; - - return result; -} - -WRITE8_MEMBER( wd7600_device::dma_write_word ) -{ - if (m_dma_channel == -1) - return; - - m_space->write_word(page_offset() + (offset << 1), (m_dma_high_byte << 8) | data); -} - -WRITE_LINE_MEMBER( wd7600_device::dma2_dack0_w ) -{ - m_dma1->hack_w(state ? 0 : 1); // inverted? -} - -WRITE_LINE_MEMBER( wd7600_device::dma1_eop_w ) -{ - m_dma_eop = state; - if (m_dma_channel != -1) - m_write_tc(m_dma_channel, state, 0xff); -} - -void wd7600_device::set_dma_channel(int channel, bool state) -{ - if (!state) - { - m_dma_channel = channel; - if (m_dma_eop) - m_write_tc(channel, 1, 0xff); - } - else - { - if (m_dma_channel == channel) - { - m_dma_channel = -1; - if (m_dma_eop) - m_write_tc(channel, 0, 0xff); - } - } -} - -WRITE_LINE_MEMBER( wd7600_device::gatea20_w ) -{ - keyboard_gatea20(state); -} - -WRITE_LINE_MEMBER( wd7600_device::kbrst_w ) -{ - // convert to active low signal (gets inverted in at_keybc.c) - state = (state == ASSERT_LINE ? 0 : 1); - - // detect transition - if (m_kbrst == 1 && state == 0) - { - m_write_cpureset(1); - m_write_cpureset(0); - } - - m_kbrst = state; -} - -WRITE8_MEMBER( wd7600_device::a20_reset_w ) -{ - m_alt_a20 = BIT(data,1); - a20m(); - // TODO: proper timing. Reset occurs 128 cycles after changing to a 1, and lasts for 16 cycles - if(BIT(data,0)) - { - m_write_cpureset(1); - m_write_cpureset(0); - if(LOG) logerror("WD7600 '%s': System reset\n",tag()); - } -} - -READ8_MEMBER( wd7600_device::a20_reset_r ) -{ - UINT8 ret = 0; - if(m_alt_a20) - ret |= 0x02; - return ret; -} - -// port 0x2072 - Refresh Control, and serial/parallel port address select -READ16_MEMBER(wd7600_device::refresh_r) -{ - return m_refresh_ctrl; -} - -WRITE16_MEMBER(wd7600_device::refresh_w) -{ - // TODO: select serial/parallel I/O port location - m_refresh_ctrl = data; - if(LOG) logerror("WD7600 '%s': Refresh Control write %04x\n",tag(),data); -} - -// port 0x2872 - chip select -READ16_MEMBER(wd7600_device::chipsel_r) -{ - return m_chip_sel; -} - -WRITE16_MEMBER(wd7600_device::chipsel_w) -{ - m_chip_sel = data; - if(LOG) logerror("WD7600 '%s': Chip Select write %04x\n",tag(),data); -} - -// port 0x3872 - Memory Control -READ16_MEMBER(wd7600_device::mem_ctrl_r) -{ - return m_memory_ctrl; -} - -WRITE16_MEMBER(wd7600_device::mem_ctrl_w) -{ - m_memory_ctrl = data; - if(LOG) logerror("WD7600 '%s': Memory Control write %04x\n",tag(),data); -} - -// port 0x4872 - Bank 0 and 1 start address -READ16_MEMBER(wd7600_device::bank_01_start_r) -{ - return (m_bank_start[1] << 8) | m_bank_start[0]; -} - -WRITE16_MEMBER(wd7600_device::bank_01_start_w) -{ - if(ACCESSING_BITS_0_7) - { - m_bank_start[0] = data & 0xff; - if(LOG) logerror("WD7600 '%s': Bank 0 start address %08x\n",tag(),m_bank_start[0] << 16); - } - if(ACCESSING_BITS_8_15) - { - m_bank_start[1] = (data & 0xff00) >> 8; - if(LOG) logerror("WD7600 '%s': Bank 1 start address %08x\n",tag(),m_bank_start[1] << 16); - } -} - -// port 0x5072 - Bank 2 and 3 start address -READ16_MEMBER(wd7600_device::bank_23_start_r) -{ - return (m_bank_start[3] << 8) | m_bank_start[2]; -} - -WRITE16_MEMBER(wd7600_device::bank_23_start_w) -{ - if(ACCESSING_BITS_0_7) - { - m_bank_start[2] = data & 0xff; - if(LOG) logerror("WD7600 '%s': Bank 2 start address %08x\n",tag(),m_bank_start[2] << 16); - } - if(ACCESSING_BITS_8_15) - { - m_bank_start[3] = (data & 0xff00) >> 8; - if(LOG) logerror("WD7600 '%s': Bank 3 start address %08x\n",tag(),m_bank_start[3] << 16); - } -} - -// port 0x5872 - split starting address (used for BIOS shadowing) -READ16_MEMBER(wd7600_device::split_addr_r) -{ - return m_split_start; -} - -WRITE16_MEMBER(wd7600_device::split_addr_w) -{ - m_split_start = data; - if(LOG) logerror("WD7600 '%s': Split start address write %04x\n",tag(),data); -} - -// port 0x9872 - Diagnostic -READ16_MEMBER(wd7600_device::diag_r) -{ - return m_diagnostic | 0xe080; -} - -WRITE16_MEMBER(wd7600_device::diag_w) -{ - m_diagnostic = data; - if(LOG) logerror("WD7600 '%s': Diagnostic write %04x\n",tag(),data); -} |