/***************************************************************************
PC/AT 486 with Chips & Technologies CS4031 chipset
license: MAME, GPL-2.0+
copyright-holders: Dirk Best
***************************************************************************/
#include "emu.h"
#include "cpu/i386/i386.h"
#include "machine/ram.h"
#include "machine/cs4031.h"
#include "machine/at_keybc.h"
#include "bus/pc_kbd/pc_kbdc.h"
#include "bus/pc_kbd/keyboards.h"
#include "bus/isa/isa.h"
#include "bus/isa/isa_cards.h"
#include "sound/speaker.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
class ct486_state : public driver_device
{
public:
ct486_state(const machine_config &mconfig, device_type type, const char *tag) :
driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
m_cs4031(*this, "cs4031"),
m_isabus(*this, "isabus"),
m_speaker(*this, "speaker")
{ }
required_device<cpu_device> m_maincpu;
required_device<cs4031_device> m_cs4031;
required_device<isa16_device> m_isabus;
required_device<speaker_sound_device> m_speaker;
virtual void machine_start();
DECLARE_READ16_MEMBER( cs4031_ior );
DECLARE_WRITE16_MEMBER( cs4031_iow );
DECLARE_WRITE_LINE_MEMBER( cs4031_hold );
DECLARE_WRITE8_MEMBER( cs4031_tc ) { m_isabus->eop_w(offset, data); }
DECLARE_WRITE_LINE_MEMBER( cs4031_spkr ) { m_speaker->level_w(state); }
};
//**************************************************************************
// MACHINE EMULATION
//**************************************************************************
void ct486_state::machine_start()
{
}
READ16_MEMBER( ct486_state::cs4031_ior )
{
if (offset < 4)
return m_isabus->dack_r(offset);
else
return m_isabus->dack16_r(offset);
}
WRITE16_MEMBER( ct486_state::cs4031_iow )
{
if (offset < 4)
m_isabus->dack_w(offset, data);
else
m_isabus->dack16_w(offset, data);
}
WRITE_LINE_MEMBER( ct486_state::cs4031_hold )
{
// halt cpu
m_maincpu->set_input_line(INPUT_LINE_HALT, state ? ASSERT_LINE : CLEAR_LINE);
// and acknowledge hold
m_cs4031->hlda_w(state);
}
//**************************************************************************
// ADDRESS MAPS
//**************************************************************************
static ADDRESS_MAP_START( ct486_map, AS_PROGRAM, 32, ct486_state )
ADDRESS_MAP_END
static ADDRESS_MAP_START( ct486_io, AS_IO, 32, ct486_state )
ADDRESS_MAP_UNMAP_HIGH
ADDRESS_MAP_END
//**************************************************************************
// MACHINE DRIVERS
//**************************************************************************
static MACHINE_CONFIG_START( ct486, ct486_state )
MCFG_CPU_ADD("maincpu", I486, XTAL_25MHz)
MCFG_CPU_PROGRAM_MAP(ct486_map)
MCFG_CPU_IO_MAP(ct486_io)
MCFG_CPU_IRQ_ACKNOWLEDGE_DEVICE("cs4031", cs4031_device, int_ack_r)
MCFG_CS4031_ADD("cs4031", XTAL_25MHz, "maincpu", "isa", "bios", "keybc")
// cpu connections
MCFG_CS4031_HOLD(WRITELINE(ct486_state, cs4031_hold));
MCFG_CS4031_NMI(INPUTLINE("maincpu", INPUT_LINE_NMI));
MCFG_CS4031_INTR(INPUTLINE("maincpu", INPUT_LINE_IRQ0));
MCFG_CS4031_CPURESET(INPUTLINE("maincpu", INPUT_LINE_RESET));
MCFG_CS4031_A20M(INPUTLINE("maincpu", INPUT_LINE_A20));
// isa dma
MCFG_CS4031_IOR(READ16(ct486_state, cs4031_ior))
MCFG_CS4031_IOW(WRITE16(ct486_state, cs4031_iow))
MCFG_CS4031_TC(WRITE8(ct486_state, cs4031_tc))
// speaker
MCFG_CS4031_SPKR(WRITELINE(ct486_state, cs4031_spkr))
MCFG_RAM_ADD(RAM_TAG)
MCFG_RAM_DEFAULT_SIZE("4M")
MCFG_RAM_EXTRA_OPTIONS("1M,2M,8M,16M,32M,64M")
MCFG_DEVICE_ADD("keybc", AT_KEYBOARD_CONTROLLER, XTAL_12MHz)
MCFG_AT_KEYBOARD_CONTROLLER_SYSTEM_RESET_CB(DEVWRITELINE("cs4031", cs4031_device, kbrst_w))
MCFG_AT_KEYBOARD_CONTROLLER_GATE_A20_CB(DEVWRITELINE("cs4031", cs4031_device, gatea20_w))
MCFG_AT_KEYBOARD_CONTROLLER_INPUT_BUFFER_FULL_CB(DEVWRITELINE("cs4031", cs4031_device, irq01_w))
MCFG_AT_KEYBOARD_CONTROLLER_KEYBOARD_CLOCK_CB(DEVWRITELINE("pc_kbdc", pc_kbdc_device, clock_write_from_mb))
MCFG_AT_KEYBOARD_CONTROLLER_KEYBOARD_DATA_CB(DEVWRITELINE("pc_kbdc", pc_kbdc_device, data_write_from_mb))
MCFG_DEVICE_ADD("pc_kbdc", PC_KBDC, 0)
MCFG_PC_KBDC_OUT_CLOCK_CB(DEVWRITELINE("keybc", at_keyboard_controller_device, keyboard_clock_w))
MCFG_PC_KBDC_OUT_DATA_CB(DEVWRITELINE("keybc", at_keyboard_controller_device, keyboard_data_w))
MCFG_PC_KBDC_SLOT_ADD("pc_kbdc", "kbd", pc_at_keyboards, STR_KBD_MICROSOFT_NATURAL)
MCFG_DEVICE_ADD("isabus", ISA16, 0)
MCFG_ISA16_CPU(":maincpu")
MCFG_ISA_BUS_IOCHCK(DEVWRITELINE("cs4031", cs4031_device, iochck_w))
MCFG_ISA_OUT_IRQ2_CB(DEVWRITELINE("cs4031", cs4031_device, irq09_w))
MCFG_ISA_OUT_IRQ3_CB(DEVWRITELINE("cs4031", cs4031_device, irq03_w))
MCFG_ISA_OUT_IRQ4_CB(DEVWRITELINE("cs4031", cs4031_device, irq04_w))
MCFG_ISA_OUT_IRQ5_CB(DEVWRITELINE("cs4031", cs4031_device, irq05_w))
MCFG_ISA_OUT_IRQ6_CB(DEVWRITELINE("cs4031", cs4031_device, irq06_w))
MCFG_ISA_OUT_IRQ7_CB(DEVWRITELINE("cs4031", cs4031_device, irq07_w))
MCFG_ISA_OUT_IRQ10_CB(DEVWRITELINE("cs4031", cs4031_device, irq10_w))
MCFG_ISA_OUT_IRQ11_CB(DEVWRITELINE("cs4031", cs4031_device, irq11_w))
MCFG_ISA_OUT_IRQ12_CB(DEVWRITELINE("cs4031", cs4031_device, irq12_w))
MCFG_ISA_OUT_IRQ14_CB(DEVWRITELINE("cs4031", cs4031_device, irq14_w))
MCFG_ISA_OUT_IRQ15_CB(DEVWRITELINE("cs4031", cs4031_device, irq15_w))
MCFG_ISA_OUT_DRQ0_CB(DEVWRITELINE("cs4031", cs4031_device, dreq0_w))
MCFG_ISA_OUT_DRQ1_CB(DEVWRITELINE("cs4031", cs4031_device, dreq1_w))
MCFG_ISA_OUT_DRQ2_CB(DEVWRITELINE("cs4031", cs4031_device, dreq2_w))
MCFG_ISA_OUT_DRQ3_CB(DEVWRITELINE("cs4031", cs4031_device, dreq3_w))
MCFG_ISA_OUT_DRQ5_CB(DEVWRITELINE("cs4031", cs4031_device, dreq5_w))
MCFG_ISA_OUT_DRQ6_CB(DEVWRITELINE("cs4031", cs4031_device, dreq6_w))
MCFG_ISA_OUT_DRQ7_CB(DEVWRITELINE("cs4031", cs4031_device, dreq7_w))
MCFG_ISA16_SLOT_ADD("isabus", "board1", pc_isa16_cards, "fdcsmc", true)
MCFG_ISA16_SLOT_ADD("isabus", "board2", pc_isa16_cards, "comat", true)
MCFG_ISA16_SLOT_ADD("isabus", "board3", pc_isa16_cards, "ide", true)
MCFG_ISA16_SLOT_ADD("isabus", "board4", pc_isa16_cards, "lpt", true)
MCFG_ISA16_SLOT_ADD("isabus", "isa1", pc_isa16_cards, "svga_et4k", false)
MCFG_ISA16_SLOT_ADD("isabus", "isa2", pc_isa16_cards, NULL, false)
MCFG_ISA16_SLOT_ADD("isabus", "isa3", pc_isa16_cards, NULL, false)
MCFG_ISA16_SLOT_ADD("isabus", "isa4", pc_isa16_cards, NULL, false)
MCFG_ISA16_SLOT_ADD("isabus", "isa5", pc_isa16_cards, NULL, false)
// sound hardware
MCFG_SPEAKER_STANDARD_MONO("mono")
MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.50)
// video hardware
MCFG_PALETTE_ADD("palette", 256) // todo: really needed?
MACHINE_CONFIG_END
//**************************************************************************
// ROM DEFINITIONS
//**************************************************************************
ROM_START( ct486 )
ROM_REGION(0x40000, "isa", ROMREGION_ERASEFF)
ROM_REGION(0x100000, "bios", 0)
ROM_LOAD("chips_1.ami", 0xf0000, 0x10000, CRC(a14a7511) SHA1(b88d09be66905ed2deddc26a6f8522e7d2d6f9a8))
ROM_END
//**************************************************************************
// GAME DRIVERS
//**************************************************************************
COMP( 1993, ct486, 0, 0, ct486, 0, driver_device, 0, "<unknown>", "PC/AT 486 with CS4031 chipset", 0 )