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Diffstat (limited to 'src/devices/bus/isa/fdc.cpp')
-rw-r--r--src/devices/bus/isa/fdc.cpp250
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));
}