diff options
Diffstat (limited to 'src/mame/drivers/ct486.c')
-rw-r--r-- | src/mame/drivers/ct486.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/src/mame/drivers/ct486.c b/src/mame/drivers/ct486.c new file mode 100644 index 00000000000..91cc9d85c3f --- /dev/null +++ b/src/mame/drivers/ct486.c @@ -0,0 +1,198 @@ +// license:GPL-2.0+ +// copyright-holders:Dirk Best +/*************************************************************************** + + PC/AT 486 with Chips & Technologies CS4031 chipset + +***************************************************************************/ + +#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? + + /* software lists */ + MCFG_SOFTWARE_LIST_ADD("pc_disk_list","ibm5150") + MCFG_SOFTWARE_LIST_ADD("xt_disk_list","ibm5160_flop") + MCFG_SOFTWARE_LIST_ADD("at_disk_list","ibm5170") + MCFG_SOFTWARE_LIST_ADD("at_cdrom_list","ibm5170_cdrom") +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 ) |