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Diffstat (limited to 'src/emu/bus/msx_cart/disk.c')
-rw-r--r--src/emu/bus/msx_cart/disk.c231
1 files changed, 231 insertions, 0 deletions
diff --git a/src/emu/bus/msx_cart/disk.c b/src/emu/bus/msx_cart/disk.c
new file mode 100644
index 00000000000..0522a972e41
--- /dev/null
+++ b/src/emu/bus/msx_cart/disk.c
@@ -0,0 +1,231 @@
+/*****************************************************************************
+ *
+ * MSX Floopy drive interface add-on cartridges
+ *
+ * Currently supported:
+ * - Philips VY-0010 (Interface cartridge + 1 3.5" SS floppy drive)
+ *
+ ****************************************************************************/
+
+#include "emu.h"
+#include "disk.h"
+#include "formats/msx_dsk.h"
+
+
+const device_type MSX_CART_VY0010 = &device_creator<msx_cart_vy0010>;
+
+
+FLOPPY_FORMATS_MEMBER( msx_cart_vy0010::floppy_formats )
+ FLOPPY_MSX_FORMAT
+FLOPPY_FORMATS_END
+
+
+static SLOT_INTERFACE_START( msx_floppies )
+ SLOT_INTERFACE( "35dd", FLOPPY_35_DD )
+ SLOT_INTERFACE( "35ssdd", FLOPPY_35_SSDD )
+SLOT_INTERFACE_END
+
+
+msx_cart_vy0010::msx_cart_vy0010(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, MSX_CART_VY0010, "MSX Cartridge - VY0010", tag, owner, clock, "msx_cart_vy0010", __FILE__)
+ , msx_cart_interface(mconfig, *this)
+ , m_fdc(*this, "fdc")
+ , m_floppy0(*this, "fdc:0")
+ , m_floppy1(*this, "fdc:1")
+ , m_floppy(NULL)
+ , m_control(0)
+{
+}
+
+
+static MACHINE_CONFIG_FRAGMENT( vy0010 )
+ // From VY-0010 schematic:
+ // HLT pulled high
+ // SSO/-ENMF + -DDEN + ENP + -5/8 - pulled low
+ // READY inverted in VY-0010 cartridge and pulled low on VY-0010/VY-0011 floppy drive
+ MCFG_WD2793x_ADD("fdc", XTAL_4MHz / 4)
+ MCFG_WD_FDC_FORCE_READY
+
+ // Single sided 3.5" floppy drive
+ MCFG_FLOPPY_DRIVE_ADD("fdc:0", msx_floppies, "35ssdd", msx_cart_vy0010::floppy_formats)
+
+ // Attach software lists
+ // We do not know in what kind of machine the user has inserted the floppy interface
+ // so we list all msx floppy software lists.
+ //
+ MCFG_SOFTWARE_LIST_ADD("flop_list","msx2_flop")
+ MCFG_SOFTWARE_LIST_COMPATIBLE_ADD("msx1_flop_list","msx1_flop")
+MACHINE_CONFIG_END
+
+
+machine_config_constructor msx_cart_vy0010::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME( vy0010 );
+}
+
+
+void msx_cart_vy0010::device_start()
+{
+ save_item(NAME(m_side_control));
+ save_item(NAME(m_control));
+
+ machine().save().register_postload(save_prepost_delegate(FUNC(msx_cart_vy0010::post_load), this));
+}
+
+
+void msx_cart_vy0010::post_load()
+{
+ UINT8 data = m_control;
+
+ // To make sure the FDD busy led status gets set correctly
+ m_control ^= 0x40;
+
+ set_control(data);
+}
+
+
+void msx_cart_vy0010::set_control(UINT8 data)
+{
+ UINT8 old_m_control = m_control;
+
+ m_control = data;
+
+ switch (m_control & 0x03)
+ {
+ case 0:
+ case 2:
+ m_floppy = m_floppy0 ? m_floppy0->get_device() : NULL;
+ break;
+
+ case 1:
+ m_floppy = m_floppy1 ? m_floppy1->get_device() : NULL;
+ break;
+
+ default:
+ m_floppy = NULL;
+ break;
+ }
+
+ if (m_floppy)
+ {
+ m_floppy->mon_w((m_control & 0x80) ? 0 : 1);
+ m_floppy->ss_w(m_side_control & 0x01);
+ }
+
+ m_fdc->set_floppy(m_floppy);
+
+ if ((old_m_control ^ m_control) & 0x40)
+ {
+ set_led_status(machine(), 0, !(m_control & 0x40));
+ }
+}
+
+
+void msx_cart_vy0010::set_side_control(UINT8 data)
+{
+ m_side_control = data;
+
+ if (m_floppy)
+ {
+ m_floppy->ss_w(m_side_control & 0x01);
+ }
+}
+
+
+void msx_cart_vy0010::device_reset()
+{
+ m_fdc->dden_w(false);
+}
+
+
+void msx_cart_vy0010::initialize_cartridge()
+{
+ if ( get_rom_size() != 0x4000 )
+ {
+ fatalerror("vy0010: Invalid ROM size\n");
+ }
+}
+
+
+READ8_MEMBER(msx_cart_vy0010::read_cart)
+{
+ switch (offset)
+ {
+ case 0x7ff8:
+ case 0xbff8:
+ return m_fdc->status_r();
+
+ case 0x7ff9:
+ case 0xbff9:
+ return m_fdc->track_r();
+
+ case 0x7ffa:
+ case 0xbffa:
+ return m_fdc->sector_r();
+
+ case 0x7ffb:
+ case 0xbffb:
+ return m_fdc->data_r();
+
+ case 0x7ffc:
+ case 0xbffc:
+ return 0xfe | (m_side_control & 0x01);
+
+ case 0x7ffd:
+ case 0xbffd:
+ return ( m_control & 0x83 ) | 0x78;
+
+ case 0x7fff:
+ case 0xbfff:
+ return 0x3f | (m_fdc->intrq_r() ? 0 : 0x40) | (m_fdc->drq_r() ? 0 : 0x80);
+ }
+
+ if (offset >= 0x4000 && offset < 0x8000)
+ {
+ return get_rom_base()[offset & 0x3fff];
+ }
+ return 0xff;
+}
+
+
+WRITE8_MEMBER(msx_cart_vy0010::write_cart)
+{
+ switch (offset)
+ {
+ case 0x7ff8:
+ case 0xbff8:
+ m_fdc->cmd_w(data);
+ break;
+
+ case 0x7ff9:
+ case 0xbff9:
+ m_fdc->track_w(data);
+ break;
+
+ case 0x7ffa:
+ case 0xbffa:
+ m_fdc->sector_w(data);
+ break;
+
+ case 0x7ffb:
+ case 0xbffb:
+ m_fdc->data_w(data);
+ break;
+
+ case 0x7ffc:
+ case 0xbffc:
+ set_side_control(data);
+ break;
+
+ case 0x7ffd:
+ case 0xbffd:
+ set_control(data);
+ break;
+
+ default:
+ logerror("msx_cart_vy0010::write_cart: Unmapped write writing %02x to %04x\n", data, offset);
+ break;
+ }
+}
+
+