diff options
Diffstat (limited to 'src/devices/bus/isa/fdc.cpp')
-rw-r--r-- | src/devices/bus/isa/fdc.cpp | 250 |
1 files changed, 203 insertions, 47 deletions
diff --git a/src/devices/bus/isa/fdc.cpp b/src/devices/bus/isa/fdc.cpp index 3ec6db240d1..1d41a496e75 100644 --- a/src/devices/bus/isa/fdc.cpp +++ b/src/devices/bus/isa/fdc.cpp @@ -1,5 +1,5 @@ // license:BSD-3-Clause -// copyright-holders:Miodrag Milanovic +// copyright-holders:Miodrag Milanovic, Wilbert Pol /********************************************************************** ISA 8 bit Floppy Disk Controller @@ -9,17 +9,19 @@ #include "emu.h" #include "fdc.h" #include "machine/busmouse.h" -#include "machine/pc_fdc.h" -#include "formats/pc_dsk.h" #include "formats/naslite_dsk.h" #include "formats/ibmxdf_dsk.h" +#define VERBOSE 0 +#include "logmacro.h" -FLOPPY_FORMATS_MEMBER( isa8_fdc_device::floppy_formats ) - FLOPPY_PC_FORMAT, - FLOPPY_NASLITE_FORMAT, - FLOPPY_IBMXDF_FORMAT -FLOPPY_FORMATS_END + +void isa8_fdc_device::floppy_formats(format_registration &fr) +{ + fr.add_pc_formats(); + fr.add(FLOPPY_NASLITE_FORMAT); + fr.add(FLOPPY_IBMXDF_FORMAT); +} static void pc_dd_floppies(device_slot_interface &device) { @@ -43,23 +45,12 @@ isa8_fdc_device::isa8_fdc_device(const machine_config &mconfig, device_type type { } -void isa8_fdc_device::device_start() -{ - set_isa_device(); - m_isa->install_device(0x03f0, 0x03f7, *m_fdc, &pc_fdc_interface::map); - m_isa->set_dma_channel(2, this, true); -} - -void isa8_fdc_device::device_reset() -{ -} - -WRITE_LINE_MEMBER( isa8_fdc_device::irq_w ) +void isa8_fdc_device::irq_w(int state) { m_isa->irq6_w(state ? ASSERT_LINE : CLEAR_LINE); } -WRITE_LINE_MEMBER( isa8_fdc_device::drq_w ) +void isa8_fdc_device::drq_w(int state) { m_isa->drq2_w(state ? ASSERT_LINE : CLEAR_LINE); } @@ -85,31 +76,179 @@ void isa8_fdc_device::eop_w(int state) } -isa8_fdc_xt_device::isa8_fdc_xt_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : isa8_fdc_device(mconfig, ISA8_FDC_XT, tag, owner, clock) +isa8_upd765_fdc_device::isa8_upd765_fdc_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) + : isa8_fdc_device(mconfig, type, tag, owner, clock) + , dor(0x00) +{ +} + +void isa8_upd765_fdc_device::device_start() +{ + for(int i=0; i<4; i++) { + char name[2] = {static_cast<char>('0'+i), 0}; + floppy_connector *conn = m_fdc->subdevice<floppy_connector>(name); + floppy[i] = conn ? conn->get_device() : nullptr; + } + + irq = drq = false; + fdc_irq = fdc_drq = false; +} + +void isa8_upd765_fdc_device::device_reset() +{ + dor_w(0x00); +} + +// Bits 0-1 select one of the 4 drives, but only if the associated +// motor bit is on + +// Bit 2 is tied to the upd765 reset line + +// Bit 3 enables the irq and drq lines + +// Bit 4-7 control the drive motors + +void isa8_upd765_fdc_device::dor_w(uint8_t data) +{ + LOG("dor = %02x\n", data); + dor = data; + + for(int i=0; i<4; i++) + if(floppy[i]) + floppy[i]->mon_w(!(dor & (0x10 << i))); + + int fid = dor & 3; + if(dor & (0x10 << fid)) + m_fdc->set_floppy(floppy[fid]); + else + m_fdc->set_floppy(nullptr); + + check_irq(); + check_drq(); + m_fdc->reset_w(!BIT(dor, 2)); +} + +uint8_t isa8_upd765_fdc_device::dor_r() +{ + return dor; +} + +void isa8_upd765_fdc_device::ccr_w(uint8_t data) +{ + static const int rates[4] = { 500000, 300000, 250000, 1000000 }; + LOG("ccr = %02x\n", data); + m_fdc->set_rate(rates[data & 3]); +} + +uint8_t isa8_upd765_fdc_device::dir_r() +{ + if(floppy[dor & 3]) + return floppy[dor & 3]->dskchg_r() ? 0x00 : 0x80; + return 0x00; +} + +void isa8_upd765_fdc_device::fdc_irq_w(int state) +{ + fdc_irq = state; + check_irq(); +} + +void isa8_upd765_fdc_device::fdc_drq_w(int state) +{ + fdc_drq = state; + check_drq(); +} + +void isa8_upd765_fdc_device::check_irq() +{ + bool pirq = irq; + irq = fdc_irq && (dor & 4) && (dor & 8); + if(irq != pirq) { + LOG("pc_irq = %d\n", irq); + irq_w(irq); + } +} + +void isa8_upd765_fdc_device::check_drq() +{ + bool pdrq = drq; + drq = fdc_drq && (dor & 4) && (dor & 8); + if(drq != pdrq) + drq_w(drq); +} + + +isa8_fdc_xt_device::isa8_fdc_xt_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : isa8_fdc_xt_device(mconfig, ISA8_FDC_XT, tag, owner, clock) +{ +} + +isa8_fdc_xt_device::isa8_fdc_xt_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) : isa8_upd765_fdc_device(mconfig, type, tag, owner, clock) { } void isa8_fdc_xt_device::device_add_mconfig(machine_config &config) { - pc_fdc_xt_device &pc_fdc_xt(PC_FDC_XT(config, m_fdc, 0)); - pc_fdc_xt.intrq_wr_callback().set(FUNC(isa8_fdc_device::irq_w)); - pc_fdc_xt.drq_wr_callback().set(FUNC(isa8_fdc_device::drq_w)); - FLOPPY_CONNECTOR(config, "fdc:0", pc_dd_floppies, "525dd", isa8_fdc_device::floppy_formats); - FLOPPY_CONNECTOR(config, "fdc:1", pc_dd_floppies, "525dd", isa8_fdc_device::floppy_formats); + upd765a_device &upd765a(UPD765A(config, m_fdc, 8'000'000, false, false)); + upd765a.intrq_wr_callback().set(FUNC(isa8_fdc_xt_device::fdc_irq_w)); + upd765a.drq_wr_callback().set(FUNC(isa8_fdc_xt_device::fdc_drq_w)); + FLOPPY_CONNECTOR(config, "fdc:0", pc_dd_floppies, "525dd", isa8_fdc_device::floppy_formats).enable_sound(true); + FLOPPY_CONNECTOR(config, "fdc:1", pc_dd_floppies, "525dd", isa8_fdc_device::floppy_formats).enable_sound(true); +} + +void isa8_fdc_xt_device::device_start() +{ + set_isa_device(); + m_isa->install_device(0x03f0, 0x03f7, *this, &isa8_fdc_xt_device::map); + m_isa->set_dma_channel(2, this, true); + + isa8_upd765_fdc_device::device_start(); } +// The schematics show address decoding is minimal +void isa8_fdc_xt_device::map(address_map &map) +{ + map(0x0, 0x0).r(m_fdc, FUNC(upd765a_device::msr_r)).w(FUNC(isa8_fdc_xt_device::dor_w)); + map(0x1, 0x1).r(m_fdc, FUNC(upd765a_device::fifo_r)).w(FUNC(isa8_fdc_xt_device::dor_fifo_w)); + map(0x2, 0x2).w(FUNC(isa8_fdc_xt_device::dor_w)); + map(0x3, 0x3).w(FUNC(isa8_fdc_xt_device::dor_w)); + map(0x4, 0x5).m(m_fdc, FUNC(upd765a_device::map)); +} -isa8_fdc_at_device::isa8_fdc_at_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : isa8_fdc_device(mconfig, ISA8_FDC_AT, tag, owner, clock) +void isa8_fdc_xt_device::dor_fifo_w(uint8_t data) +{ + m_fdc->fifo_w(data); + dor_w(data); +} + + +isa8_fdc_at_device::isa8_fdc_at_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : isa8_upd765_fdc_device(mconfig, ISA8_FDC_AT, tag, owner, clock) { } void isa8_fdc_at_device::device_add_mconfig(machine_config &config) { - pc_fdc_at_device &pc_fdc_at(PC_FDC_AT(config, m_fdc, 0)); - pc_fdc_at.intrq_wr_callback().set(FUNC(isa8_fdc_device::irq_w)); - pc_fdc_at.drq_wr_callback().set(FUNC(isa8_fdc_device::drq_w)); - FLOPPY_CONNECTOR(config, "fdc:0", pc_hd_floppies, "35hd", isa8_fdc_device::floppy_formats); - FLOPPY_CONNECTOR(config, "fdc:1", pc_hd_floppies, "35hd", isa8_fdc_device::floppy_formats); + upd765a_device &upd765a(UPD765A(config, m_fdc, 8'000'000, false, false)); + upd765a.intrq_wr_callback().set(FUNC(isa8_fdc_at_device::fdc_irq_w)); + upd765a.drq_wr_callback().set(FUNC(isa8_fdc_at_device::fdc_drq_w)); + FLOPPY_CONNECTOR(config, "fdc:0", pc_hd_floppies, "35hd", isa8_fdc_device::floppy_formats).enable_sound(true); + FLOPPY_CONNECTOR(config, "fdc:1", pc_hd_floppies, "35hd", isa8_fdc_device::floppy_formats).enable_sound(true); +} + +// Decoding is through a PAL, so presumably complete +void isa8_fdc_at_device::map(address_map &map) +{ + map(0x2, 0x2).rw(FUNC(isa8_fdc_at_device::dor_r), FUNC(isa8_fdc_at_device::dor_w)); + map(0x4, 0x5).m(m_fdc, FUNC(upd765a_device::map)); + map(0x7, 0x7).rw(FUNC(isa8_fdc_at_device::dir_r), FUNC(isa8_fdc_at_device::ccr_w)); +} + +void isa8_fdc_at_device::device_start() +{ + set_isa_device(); + m_isa->install_device(0x03f0, 0x03f7, *this, &isa8_fdc_at_device::map); + m_isa->set_dma_channel(2, this, true); + + isa8_upd765_fdc_device::device_start(); } isa8_fdc_smc_device::isa8_fdc_smc_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : isa8_fdc_device(mconfig, ISA8_FDC_SMC, tag, owner, clock) @@ -121,8 +260,15 @@ void isa8_fdc_smc_device::device_add_mconfig(machine_config &config) smc37c78_device &smc(SMC37C78(config, m_fdc, 24'000'000)); smc.intrq_wr_callback().set(FUNC(isa8_fdc_device::irq_w)); smc.drq_wr_callback().set(FUNC(isa8_fdc_device::drq_w)); - FLOPPY_CONNECTOR(config, "fdc:0", pc_hd_floppies, "35hd", isa8_fdc_device::floppy_formats); - FLOPPY_CONNECTOR(config, "fdc:1", pc_hd_floppies, "35hd", isa8_fdc_device::floppy_formats); + FLOPPY_CONNECTOR(config, "fdc:0", pc_hd_floppies, "35hd", isa8_fdc_device::floppy_formats).enable_sound(true); + FLOPPY_CONNECTOR(config, "fdc:1", pc_hd_floppies, "35hd", isa8_fdc_device::floppy_formats).enable_sound(true); +} + +void isa8_fdc_smc_device::device_start() +{ + set_isa_device(); + m_isa->install_device(0x03f0, 0x03f7, downcast<smc37c78_device &>(*m_fdc), &smc37c78_device::map); + m_isa->set_dma_channel(2, this, true); } isa8_fdc_ps2_device::isa8_fdc_ps2_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : isa8_fdc_device(mconfig, ISA8_FDC_PS2, tag, owner, clock) @@ -135,8 +281,15 @@ void isa8_fdc_ps2_device::device_add_mconfig(machine_config &config) n82077aa.set_mode(n82077aa_device::mode_t::PS2); n82077aa.intrq_wr_callback().set(FUNC(isa8_fdc_device::irq_w)); n82077aa.drq_wr_callback().set(FUNC(isa8_fdc_device::drq_w)); - FLOPPY_CONNECTOR(config, "fdc:0", pc_hd_floppies, "35hd", isa8_fdc_device::floppy_formats); - FLOPPY_CONNECTOR(config, "fdc:1", pc_hd_floppies, "35hd", isa8_fdc_device::floppy_formats); + FLOPPY_CONNECTOR(config, "fdc:0", pc_hd_floppies, "35hd", isa8_fdc_device::floppy_formats).enable_sound(true); + FLOPPY_CONNECTOR(config, "fdc:1", pc_hd_floppies, "35hd", isa8_fdc_device::floppy_formats).enable_sound(true); +} + +void isa8_fdc_ps2_device::device_start() +{ + set_isa_device(); + m_isa->install_device(0x03f0, 0x03f7, downcast<n82077aa_device &>(*m_fdc), &n82077aa_device::map); + m_isa->set_dma_channel(2, this, true); } isa8_fdc_superio_device::isa8_fdc_superio_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : isa8_fdc_device(mconfig, ISA8_FDC_SUPERIO, tag, owner, clock) @@ -148,34 +301,37 @@ void isa8_fdc_superio_device::device_add_mconfig(machine_config &config) pc_fdc_superio_device &superio(PC_FDC_SUPERIO(config, m_fdc, 24'000'000)); superio.intrq_wr_callback().set(FUNC(isa8_fdc_device::irq_w)); superio.drq_wr_callback().set(FUNC(isa8_fdc_device::drq_w)); - FLOPPY_CONNECTOR(config, "fdc:0", pc_hd_floppies, "35hd", isa8_fdc_device::floppy_formats); - FLOPPY_CONNECTOR(config, "fdc:1", pc_hd_floppies, "35hd", isa8_fdc_device::floppy_formats); + FLOPPY_CONNECTOR(config, "fdc:0", pc_hd_floppies, "35hd", isa8_fdc_device::floppy_formats).enable_sound(true); + FLOPPY_CONNECTOR(config, "fdc:1", pc_hd_floppies, "35hd", isa8_fdc_device::floppy_formats).enable_sound(true); +} + +void isa8_fdc_superio_device::device_start() +{ + set_isa_device(); + m_isa->install_device(0x03f0, 0x03f7, downcast<pc_fdc_superio_device &>(*m_fdc), &pc_fdc_superio_device::map); + m_isa->set_dma_channel(2, this, true); } isa8_ec1841_0003_device::isa8_ec1841_0003_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) - : isa8_fdc_device(mconfig, ISA8_EC1841_0003, tag, owner, clock) + : isa8_fdc_xt_device(mconfig, ISA8_EC1841_0003, tag, owner, clock) , m_bus_mouse(*this, "bus_mouse") { } void isa8_ec1841_0003_device::device_start() { - isa8_fdc_device::device_start(); + isa8_fdc_xt_device::device_start(); m_isa->install_device(0x023c, 0x023f, *m_bus_mouse, &bus_mouse_device::map); } -WRITE_LINE_MEMBER( isa8_ec1841_0003_device::aux_irq_w ) +void isa8_ec1841_0003_device::aux_irq_w(int state) { m_isa->irq4_w(state ? ASSERT_LINE : CLEAR_LINE); } void isa8_ec1841_0003_device::device_add_mconfig(machine_config &config) { - pc_fdc_xt_device &pc_fdc_xt(PC_FDC_XT(config, m_fdc, 0)); - pc_fdc_xt.intrq_wr_callback().set(FUNC(isa8_fdc_device::irq_w)); - pc_fdc_xt.drq_wr_callback().set(FUNC(isa8_fdc_device::drq_w)); - FLOPPY_CONNECTOR(config, "fdc:0", pc_dd_floppies, "525dd", isa8_fdc_device::floppy_formats); - FLOPPY_CONNECTOR(config, "fdc:1", pc_dd_floppies, "525dd", isa8_fdc_device::floppy_formats); + isa8_fdc_xt_device::device_add_mconfig(config); BUS_MOUSE(config, "bus_mouse", 0).extint_callback().set(FUNC(isa8_ec1841_0003_device::aux_irq_w)); } |