diff options
Diffstat (limited to 'src/devices/bus/a2bus/a2diskii.cpp')
-rw-r--r-- | src/devices/bus/a2bus/a2diskii.cpp | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/src/devices/bus/a2bus/a2diskii.cpp b/src/devices/bus/a2bus/a2diskii.cpp new file mode 100644 index 00000000000..ad8a860a69f --- /dev/null +++ b/src/devices/bus/a2bus/a2diskii.cpp @@ -0,0 +1,153 @@ +// license:BSD-3-Clause +// copyright-holders:R. Belmont +/********************************************************************* + + a2diskii.c + + Implementation of the Apple II Disk II controller card + +*********************************************************************/ + +#include "emu.h" +#include "includes/apple2.h" +#include "imagedev/flopdrv.h" +#include "formats/ap2_dsk.h" +#include "machine/appldriv.h" +#include "a2diskii.h" + + +/*************************************************************************** + PARAMETERS +***************************************************************************/ + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +const device_type A2BUS_DISKII = &device_creator<a2bus_diskii_device>; +const device_type A2BUS_IWM_FDC = &device_creator<a2bus_iwmflop_device>; + +#define DISKII_ROM_REGION "diskii_rom" +#define FDC_TAG "diskii_fdc" + +const applefdc_interface fdc_interface = +{ + apple525_set_lines, /* set_lines */ + apple525_set_enable_lines, /* set_enable_lines */ + + apple525_read_data, /* read_data */ + apple525_write_data, /* write_data */ + apple525_read_status /* read_status */ +}; + +static const floppy_interface floppy_interface = +{ + FLOPPY_STANDARD_5_25_DSHD, + LEGACY_FLOPPY_OPTIONS_NAME(apple2), + "floppy_5_25" +}; + +MACHINE_CONFIG_FRAGMENT( diskii ) + MCFG_APPLEFDC_ADD(FDC_TAG, fdc_interface) + MCFG_LEGACY_FLOPPY_APPLE_2_DRIVES_ADD(floppy_interface,15,16) +MACHINE_CONFIG_END + +MACHINE_CONFIG_FRAGMENT( iwmflop ) + MCFG_IWM_ADD(FDC_TAG, fdc_interface) + MCFG_LEGACY_FLOPPY_APPLE_2_DRIVES_ADD(floppy_interface,15,16) +MACHINE_CONFIG_END + +ROM_START( diskii ) + ROM_REGION(0x100, DISKII_ROM_REGION, 0) + ROM_LOAD( "341-0027-a.p5", 0x000000, 0x000100, CRC(ce7144f6) SHA1(d4181c9f046aafc3fb326b381baac809d9e38d16) ) +ROM_END + +//------------------------------------------------- +// machine_config_additions - device-specific +// machine configurations +//------------------------------------------------- + +machine_config_constructor a2bus_floppy_device::device_mconfig_additions() const +{ + return MACHINE_CONFIG_NAME( diskii ); +} + +machine_config_constructor a2bus_iwmflop_device::device_mconfig_additions() const +{ + return MACHINE_CONFIG_NAME( iwmflop ); +} + +//------------------------------------------------- +// rom_region - device-specific ROM region +//------------------------------------------------- + +const rom_entry *a2bus_floppy_device::device_rom_region() const +{ + return ROM_NAME( diskii ); +} + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +a2bus_floppy_device::a2bus_floppy_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source) : + device_t(mconfig, type, name, tag, owner, clock, shortname, source), + device_a2bus_card_interface(mconfig, *this), + m_fdc(*this, FDC_TAG) +{ +} + +a2bus_diskii_device::a2bus_diskii_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + a2bus_floppy_device(mconfig, A2BUS_DISKII, "Apple Disk II controller", tag, owner, clock, "a2diskii", __FILE__) +{ +} + +a2bus_iwmflop_device::a2bus_iwmflop_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + a2bus_floppy_device(mconfig, A2BUS_IWM_FDC, "Apple IWM floppy card", tag, owner, clock, "a2iwm_flop", __FILE__) +{ +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void a2bus_floppy_device::device_start() +{ + // set_a2bus_device makes m_slot valid + set_a2bus_device(); + + m_rom = device().machine().root_device().memregion(this->subtag(DISKII_ROM_REGION).c_str())->base(); +} + +void a2bus_floppy_device::device_reset() +{ +} + + +/*------------------------------------------------- + read_c0nx - called for reads from this card's c0nx space +-------------------------------------------------*/ + +UINT8 a2bus_floppy_device::read_c0nx(address_space &space, UINT8 offset) +{ + return m_fdc->read(offset); +} + + +/*------------------------------------------------- + write_c0nx - called for writes to this card's c0nx space +-------------------------------------------------*/ + +void a2bus_floppy_device::write_c0nx(address_space &space, UINT8 offset, UINT8 data) +{ + m_fdc->write(offset, data); +} + +/*------------------------------------------------- + read_cnxx - called for reads from this card's c0nx space +-------------------------------------------------*/ + +UINT8 a2bus_floppy_device::read_cnxx(address_space &space, UINT8 offset) +{ + return m_rom[offset]; +} |