summaryrefslogtreecommitdiffstatshomepage
path: root/src/mess/machine/c1571.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/mess/machine/c1571.c')
-rw-r--r--src/mess/machine/c1571.c881
1 files changed, 881 insertions, 0 deletions
diff --git a/src/mess/machine/c1571.c b/src/mess/machine/c1571.c
new file mode 100644
index 00000000000..6773991fe8c
--- /dev/null
+++ b/src/mess/machine/c1571.c
@@ -0,0 +1,881 @@
+/**********************************************************************
+
+ Commodore 1570/1571/1571CR Single Disk Drive emulation
+
+ Copyright MESS Team.
+ Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************/
+
+/*
+
+ TODO:
+
+ - fast serial
+ - 1541/1571 Alignment shows drive speed as 266 rpm, should be 310
+ - CP/M disks
+
+*/
+
+#include "c1541.h"
+#include "c1571.h"
+
+
+
+//**************************************************************************
+// MACROS / CONSTANTS
+//**************************************************************************
+
+#define M6502_TAG "u1"
+#define M6522_0_TAG "u9"
+#define M6522_1_TAG "u4"
+#define M6526_TAG "u20"
+#define WD1770_TAG "u11"
+#define C64H156_TAG "u6"
+
+
+enum
+{
+ LED_POWER = 0,
+ LED_ACT
+};
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type C1570 = &device_creator<c1570_device>;
+const device_type C1571 = &device_creator<c1571_device>;
+const device_type C1571CR = &device_creator<c1571cr_device>;
+const device_type MINI_CHIEF = &device_creator<mini_chief_device>;
+
+
+//-------------------------------------------------
+// device_config_complete - perform any
+// operations now that the configuration is
+// complete
+//-------------------------------------------------
+
+void base_c1571_device::device_config_complete()
+{
+ switch (m_variant)
+ {
+ case TYPE_1570:
+ m_shortname = "c1570";
+ break;
+
+ default:
+ case TYPE_1571:
+ m_shortname = "c1571";
+ break;
+
+ case TYPE_1571CR:
+ m_shortname = "c1571cr";
+ break;
+
+ case TYPE_MINI_CHIEF:
+ m_shortname = "minichif";
+ break;
+ }
+}
+
+
+//-------------------------------------------------
+// ROM( c1570 )
+//-------------------------------------------------
+
+ROM_START( c1570 )
+ ROM_REGION( 0x8000, M6502_TAG, 0 )
+ ROM_LOAD( "315090-01.u2", 0x0000, 0x8000, CRC(5a0c7937) SHA1(5fc06dc82ff6840f183bd43a4d9b8a16956b2f56) )
+ROM_END
+
+
+//-------------------------------------------------
+// ROM( c1571 )
+//-------------------------------------------------
+
+ROM_START( c1571 )
+ ROM_REGION( 0x8000, M6502_TAG, 0 )
+ ROM_DEFAULT_BIOS("r5")
+ ROM_SYSTEM_BIOS( 0, "r3", "Revision 3" )
+ ROMX_LOAD( "310654-03.u2", 0x0000, 0x8000, CRC(3889b8b8) SHA1(e649ef4419d65829d2afd65e07d31f3ce147d6eb), ROM_BIOS(1) )
+ ROM_SYSTEM_BIOS( 1, "r5", "Revision 5" )
+ ROMX_LOAD( "310654-05.u2", 0x0000, 0x8000, CRC(5755bae3) SHA1(f1be619c106641a685f6609e4d43d6fc9eac1e70), ROM_BIOS(2) )
+ ROM_SYSTEM_BIOS( 2, "jiffydos", "JiffyDOS v6.01" )
+ ROMX_LOAD( "jiffydos 1571.u2", 0x0000, 0x8000, CRC(fe6cac6d) SHA1(d4b79b60cf1eaa399d0932200eb7811e00455249), ROM_BIOS(3) )
+ROM_END
+
+
+//-------------------------------------------------
+// ROM( c1571cr )
+//-------------------------------------------------
+
+ROM_START( c1571cr )
+ ROM_REGION( 0x8000, M6502_TAG, 0 )
+ ROM_DEFAULT_BIOS("cbm")
+ ROM_SYSTEM_BIOS( 0, "cbm", "Commodore" )
+ ROMX_LOAD( "318047-01.u102", 0x0000, 0x8000, CRC(f24efcc4) SHA1(14ee7a0fb7e1c59c51fbf781f944387037daa3ee), ROM_BIOS(1) )
+ ROM_SYSTEM_BIOS( 1, "jiffydos", "JiffyDOS v6.01" )
+ ROMX_LOAD( "jiffydos 1571d.u102", 0x0000, 0x8000, CRC(9cba146d) SHA1(823b178561302b403e6bfd8dd741d757efef3958), ROM_BIOS(2) )
+ROM_END
+
+
+//-------------------------------------------------
+// ROM( minichief )
+//-------------------------------------------------
+
+ROM_START( minichief )
+ ROM_REGION( 0x8000, M6502_TAG, 0 )
+ ROM_LOAD( "ictdos710.u2", 0x0000, 0x8000, CRC(aaacf7e9) SHA1(c1296995238ef23f18e7fec70a144a0566a25a27) )
+ROM_END
+
+
+//-------------------------------------------------
+// rom_region - device-specific ROM region
+//-------------------------------------------------
+
+const rom_entry *base_c1571_device::device_rom_region() const
+{
+ switch (m_variant)
+ {
+ case TYPE_1570:
+ return ROM_NAME( c1570 );
+
+ default:
+ case TYPE_1571:
+ return ROM_NAME( c1571 );
+
+ case TYPE_1571CR:
+ return ROM_NAME( c1571cr );
+
+ case TYPE_MINI_CHIEF:
+ return ROM_NAME( minichief );
+ }
+}
+
+
+//-------------------------------------------------
+// ADDRESS_MAP( c1571_mem )
+//-------------------------------------------------
+
+static ADDRESS_MAP_START( c1571_mem, AS_PROGRAM, 8, base_c1571_device )
+ AM_RANGE(0x0000, 0x07ff) AM_RAM
+ AM_RANGE(0x1800, 0x180f) AM_MIRROR(0x03f0) AM_DEVREADWRITE(M6522_0_TAG, via6522_device, read, write)
+ AM_RANGE(0x1c00, 0x1c0f) AM_MIRROR(0x03f0) AM_DEVREADWRITE(M6522_1_TAG, via6522_device, read, write)
+ AM_RANGE(0x2000, 0x2003) AM_MIRROR(0x1ffc) AM_DEVREADWRITE_LEGACY(WD1770_TAG, wd17xx_r, wd17xx_w)
+ AM_RANGE(0x4000, 0x400f) AM_MIRROR(0x3ff0) AM_DEVREADWRITE_LEGACY(M6526_TAG, mos6526_r, mos6526_w)
+ AM_RANGE(0x8000, 0xffff) AM_ROM AM_REGION(M6502_TAG, 0)
+ADDRESS_MAP_END
+
+
+//-------------------------------------------------
+// via6522_interface via0_intf
+//-------------------------------------------------
+
+WRITE_LINE_MEMBER( base_c1571_device::via0_irq_w )
+{
+ m_via0_irq = state;
+
+ m_maincpu->set_input_line(INPUT_LINE_IRQ0, (m_via0_irq || m_via1_irq || m_cia_irq) ? ASSERT_LINE : CLEAR_LINE);
+}
+
+READ8_MEMBER( base_c1571_device::via0_pa_r )
+{
+ /*
+
+ bit description
+
+ PA0 TRK0 SNS
+ PA1
+ PA2
+ PA3
+ PA4
+ PA5
+ PA6
+ PA7 BYTE RDY
+
+ */
+
+ UINT8 data = 0;
+
+ // track 0 sense
+ data |= floppy_tk00_r(m_image);
+
+ // byte ready
+ data |= m_ga->byte_r() << 7;
+
+ return data;
+}
+
+WRITE8_MEMBER( base_c1571_device::via0_pa_w )
+{
+ /*
+
+ bit description
+
+ PA0
+ PA1 SER DIR
+ PA2 SIDE
+ PA3
+ PA4
+ PA5 _1/2 MHZ
+ PA6 ATN OUT
+ PA7
+
+ */
+
+ // 1/2 MHz
+ int clock_1_2 = BIT(data, 5);
+
+ if (m_1_2mhz != clock_1_2)
+ {
+ UINT32 clock = clock_1_2 ? XTAL_16MHz/8 : XTAL_16MHz/16;
+
+ m_maincpu->set_unscaled_clock(clock);
+ m_cia->set_unscaled_clock(clock);
+ m_via0->set_unscaled_clock(clock);
+ m_via1->set_unscaled_clock(clock);
+ m_ga->accl_w(clock_1_2);
+
+ m_1_2mhz = clock_1_2;
+ }
+
+ // fast serial direction
+ int ser_dir = BIT(data, 1);
+
+ if (m_ser_dir != ser_dir)
+ {
+ m_ser_dir = ser_dir;
+
+ set_iec_data();
+ set_iec_srq();
+
+ if (!m_ser_dir)
+ {
+ //m_cia->cnt_w(m_bus->srq_r());
+ //m_cia->sp_w(m_bus->data_r());
+ }
+ }
+
+ // side select
+ m_ga->set_side(BIT(data, 2));
+
+ // attention out
+ m_bus->atn_w(this, !BIT(data, 6));
+}
+
+READ8_MEMBER( base_c1571_device::via0_pb_r )
+{
+ /*
+
+ bit description
+
+ PB0 DATA IN
+ PB1
+ PB2 CLK IN
+ PB3
+ PB4
+ PB5 DEV# SEL
+ PB6 DEV# SEL
+ PB7 ATN IN
+
+ */
+
+ UINT8 data = 0;
+
+ // data in
+ data = !m_bus->data_r();
+
+ // clock in
+ data |= !m_bus->clk_r() << 2;
+
+ // serial bus address
+ data |= (m_address - 8) << 5;
+
+ // attention in
+ data |= !m_bus->atn_r() << 7;
+
+ return data;
+}
+
+WRITE8_MEMBER( base_c1571_device::via0_pb_w )
+{
+ /*
+
+ bit description
+
+ PB0
+ PB1 DATA OUT
+ PB2
+ PB3 CLK OUT
+ PB4 ATN ACK
+ PB5
+ PB6
+ PB7
+
+ */
+
+ // data out
+ m_data_out = BIT(data, 1);
+
+ // attention acknowledge
+ m_ga->atna_w(BIT(data, 4));
+
+ // clock out
+ m_bus->clk_w(this, !BIT(data, 3));
+}
+
+READ_LINE_MEMBER( base_c1571_device::atn_in_r )
+{
+ return !m_bus->atn_r();
+}
+
+READ_LINE_MEMBER( base_c1571_device::wprt_r )
+{
+ return !floppy_wpt_r(m_image);
+}
+
+static const via6522_interface via0_intf =
+{
+ DEVCB_DEVICE_MEMBER(DEVICE_SELF_OWNER, base_c1571_device, via0_pa_r),
+ DEVCB_DEVICE_MEMBER(DEVICE_SELF_OWNER, base_c1571_device, via0_pb_r),
+ DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, base_c1571_device, atn_in_r),
+ DEVCB_NULL,
+ DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, base_c1571_device, wprt_r),
+ DEVCB_NULL,
+
+ DEVCB_DEVICE_MEMBER(DEVICE_SELF_OWNER, base_c1571_device, via0_pa_w),
+ DEVCB_DEVICE_MEMBER(DEVICE_SELF_OWNER, base_c1571_device, via0_pb_w),
+ DEVCB_NULL,
+ DEVCB_NULL,
+ DEVCB_NULL,
+ DEVCB_NULL,
+
+ DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, base_c1571_device, via0_irq_w)
+};
+
+
+//-------------------------------------------------
+// via6522_interface via1_intf
+//-------------------------------------------------
+
+WRITE_LINE_MEMBER( base_c1571_device::via1_irq_w )
+{
+ m_via1_irq = state;
+
+ m_maincpu->set_input_line(INPUT_LINE_IRQ0, (m_via0_irq || m_via1_irq || m_cia_irq) ? ASSERT_LINE : CLEAR_LINE);
+}
+
+READ8_MEMBER( base_c1571_device::via1_pb_r )
+{
+ /*
+
+ bit signal description
+
+ PB0
+ PB1
+ PB2
+ PB3
+ PB4 _WPRT write protect sense
+ PB5
+ PB6
+ PB7 _SYNC SYNC detect line
+
+ */
+
+ UINT8 data = 0;
+
+ // write protect sense
+ data |= !floppy_wpt_r(m_image) << 4;
+
+ // SYNC detect line
+ data |= m_ga->sync_r() << 7;
+
+ return data;
+}
+
+WRITE8_MEMBER( base_c1571_device::via1_pb_w )
+{
+ /*
+
+ bit signal description
+
+ PB0 STP0 stepping motor bit 0
+ PB1 STP1 stepping motor bit 1
+ PB2 MTR motor ON/OFF
+ PB3 ACT drive 0 LED
+ PB4
+ PB5 DS0 density select 0
+ PB6 DS1 density select 1
+ PB7
+
+ */
+
+ // spindle motor
+ m_ga->mtr_w(BIT(data, 2));
+
+ // stepper motor
+ m_ga->stp_w(data & 0x03); // TODO actually STP1=0, STP0=!(PB0^PB1), Y0=PB1, Y2=!PB1
+
+ // activity LED
+ output_set_led_value(LED_ACT, BIT(data, 3));
+
+ // density select
+ m_ga->ds_w((data >> 5) & 0x03);
+}
+
+static const via6522_interface via1_intf =
+{
+ DEVCB_DEVICE_MEMBER(C64H156_TAG, c64h156_device, yb_r),
+ DEVCB_DEVICE_MEMBER(DEVICE_SELF_OWNER, base_c1571_device, via1_pb_r),
+ DEVCB_DEVICE_LINE_MEMBER(C64H156_TAG, c64h156_device, byte_r),
+ DEVCB_NULL,
+ DEVCB_NULL,
+ DEVCB_NULL,
+
+ DEVCB_DEVICE_MEMBER(C64H156_TAG, c64h156_device, yb_w),
+ DEVCB_DEVICE_MEMBER(DEVICE_SELF_OWNER, base_c1571_device, via1_pb_w),
+ DEVCB_NULL,
+ DEVCB_NULL,
+ DEVCB_DEVICE_LINE_MEMBER(C64H156_TAG, c64h156_device, soe_w),
+ DEVCB_DEVICE_LINE_MEMBER(C64H156_TAG, c64h156_device, oe_w),
+
+ DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, base_c1571_device, via1_irq_w)
+};
+
+
+//-------------------------------------------------
+// mos6526_interface cia_intf
+//-------------------------------------------------
+
+WRITE_LINE_MEMBER( base_c1571_device::cia_irq_w )
+{
+ m_cia_irq = state;
+
+ m_maincpu->set_input_line(INPUT_LINE_IRQ0, (m_via0_irq || m_via1_irq || m_cia_irq) ? ASSERT_LINE : CLEAR_LINE);
+}
+
+WRITE_LINE_MEMBER( base_c1571_device::cia_pc_w )
+{
+ if (m_other != NULL)
+ {
+ m_other->parallel_strobe_w(state);
+ }
+}
+
+WRITE_LINE_MEMBER( base_c1571_device::cia_cnt_w )
+{
+ // fast serial clock out
+ m_cnt_out = state;
+ set_iec_srq();
+}
+
+WRITE_LINE_MEMBER( base_c1571_device::cia_sp_w )
+{
+ // fast serial data out
+ m_sp_out = state;
+ set_iec_data();
+}
+
+READ8_MEMBER( base_c1571_device::cia_pb_r )
+{
+ return m_parallel_data;
+}
+
+WRITE8_MEMBER( base_c1571_device::cia_pb_w )
+{
+ if (m_other != NULL)
+ {
+ m_other->parallel_data_w(data);
+ }
+}
+
+static MOS6526_INTERFACE( cia_intf )
+{
+ 0,
+ DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, base_c1571_device, cia_irq_w),
+ DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, base_c1571_device, cia_pc_w),
+ DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, base_c1571_device, cia_cnt_w),
+ DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, base_c1571_device, cia_sp_w),
+ DEVCB_NULL,
+ DEVCB_NULL,
+ DEVCB_DEVICE_MEMBER(DEVICE_SELF_OWNER, base_c1571_device, cia_pb_r),
+ DEVCB_DEVICE_MEMBER(DEVICE_SELF_OWNER, base_c1571_device, cia_pb_w)
+};
+
+
+//-------------------------------------------------
+// C64H156_INTERFACE( ga_intf )
+//-------------------------------------------------
+
+WRITE_LINE_MEMBER( base_c1571_device::atn_w )
+{
+ set_iec_data();
+}
+
+WRITE_LINE_MEMBER( base_c1571_device::byte_w )
+{
+ m_maincpu->set_input_line(M6502_SET_OVERFLOW, state);
+
+ m_via1->write_ca1(state);
+}
+
+static C64H156_INTERFACE( ga_intf )
+{
+ DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, base_c1571_device, atn_w),
+ DEVCB_NULL,
+ DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, base_c1571_device, byte_w)
+};
+
+
+//-------------------------------------------------
+// wd17xx_interface fdc_intf
+//-------------------------------------------------
+
+static const wd17xx_interface fdc_intf =
+{
+ DEVCB_LINE_GND,
+ DEVCB_NULL,
+ DEVCB_NULL,
+ { FLOPPY_0, NULL, NULL, NULL }
+};
+
+
+//-------------------------------------------------
+// LEGACY_FLOPPY_OPTIONS( c1571 )
+//-------------------------------------------------
+
+static LEGACY_FLOPPY_OPTIONS_START( c1571 )
+ LEGACY_FLOPPY_OPTION( c1571, "g64", "Commodore 1541 GCR Disk Image", g64_dsk_identify, g64_dsk_construct, NULL, NULL )
+ LEGACY_FLOPPY_OPTION( c1571, "d64", "Commodore 1541 Disk Image", d64_dsk_identify, d64_dsk_construct, NULL, NULL )
+ LEGACY_FLOPPY_OPTION( c1571, "d71", "Commodore 1571 Disk Image", d71_dsk_identify, d64_dsk_construct, NULL, NULL )
+LEGACY_FLOPPY_OPTIONS_END
+
+
+//-------------------------------------------------
+// floppy_interface c1571_floppy_interface
+//-------------------------------------------------
+
+WRITE_LINE_MEMBER( base_c1571_device::wpt_w )
+{
+ m_via0->write_ca2(!state);
+}
+
+static const floppy_interface c1571_floppy_interface =
+{
+ DEVCB_NULL,
+ DEVCB_NULL,
+ DEVCB_NULL,
+ DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, base_c1571_device, wpt_w),
+ DEVCB_NULL,
+ FLOPPY_STANDARD_5_25_DSDD,
+ LEGACY_FLOPPY_OPTIONS_NAME(c1571),
+ "floppy_5_25",
+ NULL
+};
+
+
+//-------------------------------------------------
+// floppy_interface c1570_floppy_interface
+//-------------------------------------------------
+
+static const floppy_interface c1570_floppy_interface =
+{
+ DEVCB_NULL,
+ DEVCB_NULL,
+ DEVCB_NULL,
+ DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, base_c1571_device, wpt_w),
+ DEVCB_NULL,
+ FLOPPY_STANDARD_5_25_SSDD,
+ LEGACY_FLOPPY_OPTIONS_NAME(c1541),
+ "floppy_5_25",
+ NULL
+};
+
+
+//-------------------------------------------------
+// MACHINE_DRIVER( c1571 )
+//-------------------------------------------------
+
+static MACHINE_CONFIG_FRAGMENT( c1571 )
+ MCFG_CPU_ADD(M6502_TAG, M6502, XTAL_16MHz/16)
+ MCFG_CPU_PROGRAM_MAP(c1571_mem)
+ MCFG_QUANTUM_PERFECT_CPU(M6502_TAG)
+
+ MCFG_VIA6522_ADD(M6522_0_TAG, XTAL_16MHz/16, via0_intf)
+ MCFG_VIA6522_ADD(M6522_1_TAG, XTAL_16MHz/16, via1_intf)
+ MCFG_MOS6526R1_ADD(M6526_TAG, XTAL_16MHz/16, cia_intf)
+ MCFG_WD1770_ADD(WD1770_TAG, /* XTAL_16MHz/2, */ fdc_intf)
+
+ MCFG_LEGACY_FLOPPY_DRIVE_ADD(FLOPPY_0, c1571_floppy_interface)
+ MCFG_64H156_ADD(C64H156_TAG, XTAL_16MHz, ga_intf)
+MACHINE_CONFIG_END
+
+
+//-------------------------------------------------
+// MACHINE_DRIVER( c1570 )
+//-------------------------------------------------
+
+static MACHINE_CONFIG_FRAGMENT( c1570 )
+ MCFG_CPU_ADD(M6502_TAG, M6502, XTAL_16MHz/16)
+ MCFG_CPU_PROGRAM_MAP(c1571_mem)
+ MCFG_QUANTUM_PERFECT_CPU(M6502_TAG)
+
+ MCFG_VIA6522_ADD(M6522_0_TAG, XTAL_16MHz/16, via0_intf)
+ MCFG_VIA6522_ADD(M6522_1_TAG, XTAL_16MHz/16, via1_intf)
+ MCFG_MOS6526R1_ADD(M6526_TAG, XTAL_16MHz/16, cia_intf)
+ MCFG_WD1770_ADD(WD1770_TAG, /* XTAL_16MHz/2, */ fdc_intf)
+
+ MCFG_LEGACY_FLOPPY_DRIVE_ADD(FLOPPY_0, c1570_floppy_interface)
+ MCFG_64H156_ADD(C64H156_TAG, XTAL_16MHz, ga_intf)
+MACHINE_CONFIG_END
+
+
+//-------------------------------------------------
+// machine_config_additions - device-specific
+// machine configurations
+//-------------------------------------------------
+
+machine_config_constructor base_c1571_device::device_mconfig_additions() const
+{
+ switch (m_variant)
+ {
+ case TYPE_1570:
+ return MACHINE_CONFIG_NAME( c1570 );
+
+ default:
+ return MACHINE_CONFIG_NAME( c1571 );
+ }
+}
+
+
+
+//**************************************************************************
+// INLINE HELPERS
+//**************************************************************************
+
+//-------------------------------------------------
+// base_c1571_device - constructor
+//-------------------------------------------------
+
+inline void base_c1571_device::set_iec_data()
+{
+ int data = !m_data_out && !m_ga->atn_r();
+
+ // fast serial data
+ if (m_ser_dir) data &= m_sp_out;
+
+ m_bus->data_w(this, data);
+}
+
+
+//-------------------------------------------------
+// base_c1571_device - constructor
+//-------------------------------------------------
+
+inline void base_c1571_device::set_iec_srq()
+{
+ int srq = 1;
+
+ // fast serial clock
+ if (m_ser_dir) srq &= m_cnt_out;
+
+ m_bus->srq_w(this, srq);
+}
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// base_c1571_device - constructor
+//-------------------------------------------------
+
+base_c1571_device::base_c1571_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, UINT32 variant)
+ : device_t(mconfig, type, name, tag, owner, clock),
+ device_cbm_iec_interface(mconfig, *this),
+ device_c64_floppy_parallel_interface(mconfig, *this),
+ m_maincpu(*this, M6502_TAG),
+ m_via0(*this, M6522_0_TAG),
+ m_via1(*this, M6522_1_TAG),
+ m_cia(*this, M6526_TAG),
+ m_fdc(*this, WD1770_TAG),
+ m_ga(*this, C64H156_TAG),
+ m_image(*this, FLOPPY_0),
+ m_1_2mhz(0),
+ m_data_out(1),
+ m_ser_dir(0),
+ m_sp_out(1),
+ m_cnt_out(1),
+ m_via0_irq(CLEAR_LINE),
+ m_via1_irq(CLEAR_LINE),
+ m_cia_irq(CLEAR_LINE),
+ m_variant(variant)
+{
+}
+
+
+//-------------------------------------------------
+// c1570_device - constructor
+//-------------------------------------------------
+
+c1570_device::c1570_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : base_c1571_device(mconfig, C1570, "C1570", tag, owner, clock, TYPE_1570) { }
+
+
+//-------------------------------------------------
+// c1571_device - constructor
+//-------------------------------------------------
+
+c1571_device::c1571_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : base_c1571_device(mconfig, C1571, "C1571", tag, owner, clock, TYPE_1571) { }
+
+
+//-------------------------------------------------
+// c1571cr_device - constructor
+//-------------------------------------------------
+
+c1571cr_device::c1571cr_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : base_c1571_device(mconfig, C1571CR, "C1571CR", tag, owner, clock, TYPE_1571CR) { }
+
+
+//-------------------------------------------------
+// mini_chief_device - constructor
+//-------------------------------------------------
+
+mini_chief_device::mini_chief_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : base_c1571_device(mconfig, MINI_CHIEF, "ICT Mini Chief", tag, owner, clock, TYPE_MINI_CHIEF) { }
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void base_c1571_device::device_start()
+{
+ // install image callbacks
+ floppy_install_unload_proc(m_image, base_c1571_device::on_disk_change);
+ floppy_install_load_proc(m_image, base_c1571_device::on_disk_change);
+
+ // register for state saving
+ save_item(NAME(m_1_2mhz));
+ save_item(NAME(m_data_out));
+ save_item(NAME(m_ser_dir));
+ save_item(NAME(m_sp_out));
+ save_item(NAME(m_cnt_out));
+ save_item(NAME(m_via0_irq));
+ save_item(NAME(m_via1_irq));
+ save_item(NAME(m_cia_irq));
+}
+
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void base_c1571_device::device_reset()
+{
+ m_maincpu->reset();
+
+ m_via0->reset();
+ m_via1->reset();
+ m_cia->reset();
+
+ wd17xx_mr_w(m_fdc, 0);
+ wd17xx_mr_w(m_fdc, 1);
+
+ m_sp_out = 1;
+ set_iec_data();
+
+ m_cnt_out = 1;
+ set_iec_srq();
+}
+
+
+//-------------------------------------------------
+// cbm_iec_srq -
+//-------------------------------------------------
+
+void base_c1571_device::cbm_iec_srq(int state)
+{
+ if (!m_ser_dir)
+ {
+ m_cia->cnt_w(state);
+ }
+}
+
+
+//-------------------------------------------------
+// cbm_iec_atn -
+//-------------------------------------------------
+
+void base_c1571_device::cbm_iec_atn(int state)
+{
+ m_via0->write_ca1(!state);
+ m_ga->atni_w(!state);
+
+ set_iec_data();
+}
+
+
+//-------------------------------------------------
+// cbm_iec_data -
+//-------------------------------------------------
+
+void base_c1571_device::cbm_iec_data(int state)
+{
+ if (!m_ser_dir)
+ {
+ m_cia->sp_w(state);
+ }
+}
+
+
+//-------------------------------------------------
+// cbm_iec_reset -
+//-------------------------------------------------
+
+void base_c1571_device::cbm_iec_reset(int state)
+{
+ if (!state)
+ {
+ device_reset();
+ }
+}
+
+
+//-------------------------------------------------
+// parallel_data_w -
+//-------------------------------------------------
+
+void base_c1571_device::parallel_data_w(UINT8 data)
+{
+ m_parallel_data = data;
+}
+
+
+//-------------------------------------------------
+// parallel_strobe_w -
+//-------------------------------------------------
+
+void base_c1571_device::parallel_strobe_w(int state)
+{
+ m_cia->flag_w(state);
+}
+
+
+//-------------------------------------------------
+// on_disk_change -
+//-------------------------------------------------
+
+void base_c1571_device::on_disk_change(device_image_interface &image)
+{
+ base_c1571_device *c1571 = static_cast<base_c1571_device *>(image.device().owner());
+
+ int wp = floppy_wpt_r(image);
+ c1571->m_ga->on_disk_changed(wp);
+}