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Diffstat (limited to 'src/devices/bus/bml3/bml3mp1802.cpp')
-rw-r--r--src/devices/bus/bml3/bml3mp1802.cpp71
1 files changed, 36 insertions, 35 deletions
diff --git a/src/devices/bus/bml3/bml3mp1802.cpp b/src/devices/bus/bml3/bml3mp1802.cpp
index 707a0254e81..9ee4c8a3248 100644
--- a/src/devices/bus/bml3/bml3mp1802.cpp
+++ b/src/devices/bus/bml3/bml3mp1802.cpp
@@ -12,6 +12,8 @@
#include "emu.h"
#include "bml3mp1802.h"
+#include "softlist_dev.h"
+
/***************************************************************************
PARAMETERS
@@ -28,21 +30,18 @@ static void mp1802_floppies(device_slot_interface &device)
device.option_add("dd", FLOPPY_525_DD);
}
-WRITE_LINE_MEMBER( bml3bus_mp1802_device::bml3_wd17xx_intrq_w )
+void bml3bus_mp1802_device::nmi_w(int state)
{
if (state)
- {
raise_slot_nmi();
+ else
lower_slot_nmi();
- }
}
-#define MP1802_ROM_REGION "mp1802_rom"
-
ROM_START( mp1802 )
- ROM_REGION(0x10000, MP1802_ROM_REGION, 0)
+ ROM_REGION(0x800, "mp1802_rom", 0)
// MP-1802 disk controller ROM, which replaces part of the system ROM
- ROM_LOAD( "mp1802.rom", 0xf800, 0x800, BAD_DUMP CRC(8d0dc101) SHA1(92f7d1cebecafa7472e45c4999520de5c01c6dbc))
+ ROM_LOAD( "mp1802.rom", 0x000, 0x800, BAD_DUMP CRC(8d0dc101) SHA1(92f7d1cebecafa7472e45c4999520de5c01c6dbc))
ROM_END
@@ -59,12 +58,15 @@ void bml3bus_mp1802_device::device_add_mconfig(machine_config &config)
constexpr auto CLK16M = 32.256_MHz_XTAL / 2;
MB8866(config, m_fdc, CLK16M / 16); // 16MCLK divided by IC628 (HD74LS93P)
- m_fdc->intrq_wr_callback().set(FUNC(bml3bus_mp1802_device::bml3_wd17xx_intrq_w));
+ m_fdc->intrq_wr_callback().set(m_nmigate, FUNC(input_merger_device::in_w<0>));
+
+ INPUT_MERGER_ALL_HIGH(config, m_nmigate);
+ m_nmigate->output_handler().set(FUNC(bml3bus_mp1802_device::nmi_w));
- FLOPPY_CONNECTOR(config, m_floppy0, mp1802_floppies, "dd", floppy_image_device::default_mfm_floppy_formats);
- FLOPPY_CONNECTOR(config, m_floppy1, mp1802_floppies, "dd", floppy_image_device::default_mfm_floppy_formats);
- FLOPPY_CONNECTOR(config, m_floppy2, mp1802_floppies, nullptr, floppy_image_device::default_mfm_floppy_formats);
- FLOPPY_CONNECTOR(config, m_floppy3, mp1802_floppies, nullptr, floppy_image_device::default_mfm_floppy_formats);
+ FLOPPY_CONNECTOR(config, m_floppy[0], mp1802_floppies, "dd", floppy_image_device::default_mfm_floppy_formats);
+ FLOPPY_CONNECTOR(config, m_floppy[1], mp1802_floppies, "dd", floppy_image_device::default_mfm_floppy_formats);
+ FLOPPY_CONNECTOR(config, m_floppy[2], mp1802_floppies, nullptr, floppy_image_device::default_mfm_floppy_formats);
+ FLOPPY_CONNECTOR(config, m_floppy[3], mp1802_floppies, nullptr, floppy_image_device::default_mfm_floppy_formats);
SOFTWARE_LIST(config, "flop_list").set_original("bml3_flop").set_filter("5");
}
@@ -79,28 +81,23 @@ const tiny_rom_entry *bml3bus_mp1802_device::device_rom_region() const
uint8_t bml3bus_mp1802_device::bml3_mp1802_r()
{
- return m_fdc->drq_r() ? 0x00 : 0x80;
+ return (m_fdc->drq_r() ? 0x00 : 0x80) | (m_fdc->intrq_r() ? 0x00 : 0x40);
}
void bml3bus_mp1802_device::bml3_mp1802_w(uint8_t data)
{
- floppy_image_device *floppy = nullptr;
-
- switch (data & 0x03)
- {
- case 0: floppy = m_floppy0->get_device(); break;
- case 1: floppy = m_floppy1->get_device(); break;
- case 2: floppy = m_floppy2->get_device(); break;
- case 3: floppy = m_floppy3->get_device(); break;
- }
+ floppy_image_device *floppy = m_floppy[data & 0x03]->get_device();
m_fdc->set_floppy(floppy);
+ m_fdc->dden_w(!BIT(data, 5));
if (floppy)
{
floppy->mon_w(!BIT(data, 3));
floppy->ss_w(BIT(data, 4));
}
+
+ m_nmigate->in_w<1>(!BIT(data, 6));
}
@@ -112,10 +109,9 @@ bml3bus_mp1802_device::bml3bus_mp1802_device(const machine_config &mconfig, cons
device_t(mconfig, BML3BUS_MP1802, tag, owner, clock),
device_bml3bus_card_interface(mconfig, *this),
m_fdc(*this, "fdc"),
- m_floppy0(*this, "fdc:0"),
- m_floppy1(*this, "fdc:1"),
- m_floppy2(*this, "fdc:2"),
- m_floppy3(*this, "fdc:3"), m_rom(nullptr)
+ m_floppy(*this, "fdc:%u", 0U),
+ m_nmigate(*this, "nmigate"),
+ m_rom(*this, "mp1802_rom")
{
}
@@ -126,17 +122,22 @@ bml3bus_mp1802_device::bml3bus_mp1802_device(const machine_config &mconfig, cons
void bml3bus_mp1802_device::device_start()
{
- m_rom = memregion(MP1802_ROM_REGION)->base();
-
- // install into memory
- address_space &space_prg = space();
- space_prg.install_readwrite_handler(0xff00, 0xff03, read8sm_delegate(*m_fdc, FUNC(mb8866_device::read)), write8sm_delegate(*m_fdc, FUNC(mb8866_device::write)));
- space_prg.install_readwrite_handler(0xff04, 0xff04, read8smo_delegate(*this, FUNC(bml3bus_mp1802_device::bml3_mp1802_r)), write8smo_delegate(*this, FUNC(bml3bus_mp1802_device::bml3_mp1802_w)));
- // overwriting the main ROM (rather than using e.g. install_rom) should mean that bank switches for RAM expansion still work...
- uint8_t *mainrom = device().machine().root_device().memregion("maincpu")->base();
- memcpy(mainrom + 0xf800, m_rom + 0xf800, 0x800);
}
void bml3bus_mp1802_device::device_reset()
{
+ bml3_mp1802_w(0);
+}
+
+void bml3bus_mp1802_device::map_exrom(address_space_installer &space)
+{
+ space.install_rom(0xf800, 0xfeff, &m_rom[0]);
+ space.install_rom(0xfff0, 0xffff, &m_rom[0x7f0]);
+}
+
+void bml3bus_mp1802_device::map_io(address_space_installer &space)
+{
+ // install into memory
+ space.install_readwrite_handler(0xff00, 0xff03, read8sm_delegate(*m_fdc, FUNC(mb8866_device::read)), write8sm_delegate(*m_fdc, FUNC(mb8866_device::write)));
+ space.install_readwrite_handler(0xff04, 0xff04, read8smo_delegate(*this, FUNC(bml3bus_mp1802_device::bml3_mp1802_r)), write8smo_delegate(*this, FUNC(bml3bus_mp1802_device::bml3_mp1802_w)));
}