diff options
Diffstat (limited to 'src/devices/bus/ql/sandy_superdisk.cpp')
-rw-r--r-- | src/devices/bus/ql/sandy_superdisk.cpp | 275 |
1 files changed, 275 insertions, 0 deletions
diff --git a/src/devices/bus/ql/sandy_superdisk.cpp b/src/devices/bus/ql/sandy_superdisk.cpp new file mode 100644 index 00000000000..cf334d6db67 --- /dev/null +++ b/src/devices/bus/ql/sandy_superdisk.cpp @@ -0,0 +1,275 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder, Phill Harvey-Smith +/********************************************************************** + + Sandy Super Disk emulation + +**********************************************************************/ + +#include "sandy_superdisk.h" + + + +//************************************************************************** +// MACROS/CONSTANTS +//************************************************************************** + +#define WD1772_TAG "wd1772" +#define TTL74273_TAG "ttl74273" +#define CENTRONICS_TAG "centronics" + + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +const device_type SANDY_SUPER_DISK = &device_creator<sandy_super_disk_t>; + + +//------------------------------------------------- +// ROM( sandy_super_disk ) +//------------------------------------------------- + +ROM_START( sandy_super_disk ) + ROM_REGION( 0x4000, "rom", 0 ) + ROM_LOAD( "sandysuperdisk.rom", 0x0000, 0x4000, CRC(b52077da) SHA1(bf531758145ffd083e01c1cf9c45d0e9264a3b53) ) +ROM_END + + +//------------------------------------------------- +// rom_region - device-specific ROM region +//------------------------------------------------- + +const rom_entry *sandy_super_disk_t::device_rom_region() const +{ + return ROM_NAME( sandy_super_disk ); +} + + +//------------------------------------------------- +// SLOT_INTERFACE( sandy_super_disk_floppies ) +//------------------------------------------------- + +static SLOT_INTERFACE_START( sandy_super_disk_floppies ) + SLOT_INTERFACE( "35dd", FLOPPY_35_DD ) +SLOT_INTERFACE_END + + +//------------------------------------------------- +// FLOPPY_FORMATS( floppy_formats ) +//------------------------------------------------- + +FLOPPY_FORMATS_MEMBER( sandy_super_disk_t::floppy_formats ) + FLOPPY_QL_FORMAT +FLOPPY_FORMATS_END + + +//------------------------------------------------- +// centronics +//------------------------------------------------- + +WRITE_LINE_MEMBER( sandy_super_disk_t::busy_w ) +{ + m_busy = state; + check_interrupt(); +} + + +//------------------------------------------------- +// MACHINE_CONFIG_FRAGMENT( sandy_super_disk ) +//------------------------------------------------- + +static MACHINE_CONFIG_FRAGMENT( sandy_super_disk ) + MCFG_DEVICE_ADD(WD1772_TAG, WD1772, 8000000) + MCFG_FLOPPY_DRIVE_ADD(WD1772_TAG":0", sandy_super_disk_floppies, "35dd", sandy_super_disk_t::floppy_formats) + MCFG_FLOPPY_DRIVE_ADD(WD1772_TAG":1", sandy_super_disk_floppies, NULL, sandy_super_disk_t::floppy_formats) + + MCFG_CENTRONICS_ADD(CENTRONICS_TAG, centronics_devices, "printer") + MCFG_CENTRONICS_BUSY_HANDLER(WRITELINE(sandy_super_disk_t, busy_w)) + MCFG_CENTRONICS_OUTPUT_LATCH_ADD(TTL74273_TAG, CENTRONICS_TAG) +MACHINE_CONFIG_END + + +//------------------------------------------------- +// machine_config_additions - device-specific +// machine configurations +//------------------------------------------------- + +machine_config_constructor sandy_super_disk_t::device_mconfig_additions() const +{ + return MACHINE_CONFIG_NAME( sandy_super_disk ); +} + + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// sandy_super_disk_t - constructor +//------------------------------------------------- + +sandy_super_disk_t::sandy_super_disk_t(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, SANDY_SUPER_DISK, "Sandy Super Disk", tag, owner, clock, "ql_sdisk", __FILE__), + device_ql_expansion_card_interface(mconfig, *this), + m_fdc(*this, WD1772_TAG), + m_floppy0(*this, WD1772_TAG":0"), + m_floppy1(*this, WD1772_TAG":1"), + m_centronics(*this, CENTRONICS_TAG), + m_latch(*this, TTL74273_TAG), + m_rom(*this, "rom"), + m_busy(1) +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void sandy_super_disk_t::device_start() +{ + // state saving + save_item(NAME(m_busy)); + save_item(NAME(m_fd6)); +} + + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void sandy_super_disk_t::device_reset() +{ + m_fdc->reset(); + m_fdc->set_floppy(NULL); + m_fdc->dden_w(0); + + m_latch->write(0); + m_centronics->write_strobe(1); +} + + +//------------------------------------------------- +// read - +//------------------------------------------------- + +UINT8 sandy_super_disk_t::read(address_space &space, offs_t offset, UINT8 data) +{ + if ((offset & 0xf0000) == 0xc0000) + { + if ((offset & 0xffc0) == 0x3fc0) + { + switch ((offset >> 2) & 0x03) + { + case 0: + data = m_fdc->read(space, offset & 0x03); + break; + + case 3: + /* + + bit description + + 0 BUSY + 1 + 2 + 3 + 4 + 5 + 6 + 7 + + */ + + data = m_busy; + break; + } + } + else if (offset < 0xc4000) + { + data = m_rom->base()[offset & 0x3fff]; + } + } + + return data; +} + + +//------------------------------------------------- +// write - +//------------------------------------------------- + +void sandy_super_disk_t::write(address_space &space, offs_t offset, UINT8 data) +{ + if ((offset & 0xf0000) == 0xc0000) + { + if ((offset & 0xffc0) == 0x3fc0) + { + switch ((offset >> 2) & 0x03) + { + case 0: + m_fdc->write(space, offset & 0x03, data); + break; + + case 1: + { + /* + + bit description + + 0 SIDE ONE + 1 DSEL0 + 2 DSEL1 + 3 M ON0 + 4 /DDEN + 5 STROBE inverted + 6 enable printer interrupt + 7 + + */ + + floppy_image_device *floppy = NULL; + + if (BIT(data, 1)) + { + floppy = m_floppy0->get_device(); + } + else if (BIT(data, 2)) + { + floppy = m_floppy1->get_device(); + } + + m_fdc->set_floppy(floppy); + + if (floppy) + { + floppy->ss_w(BIT(data, 0)); + floppy->mon_w(!BIT(data, 3)); + } + + m_fdc->dden_w(BIT(data, 4)); + + m_centronics->write_strobe(!BIT(data, 5)); + + m_fd6 = BIT(data, 6); + check_interrupt(); + } + break; + + case 2: + m_latch->write(data); + break; + } + } + } +} + +void sandy_super_disk_t::check_interrupt() +{ + int extint = m_fd6 && m_busy; + + m_slot->extintl_w(extint ? ASSERT_LINE : CLEAR_LINE); +} |