// license:BSD-3-Clause // copyright-holders:Juergen Buchmueller /********************************************************** * DIABLO drive image to hard disk interface **********************************************************/ #include "emu.h" #include "diablo.h" #include "emuopts.h" #include "fileio.h" #include "harddisk.h" #include "romload.h" #include "opresolv.h" OPTION_GUIDE_START(dsk_option_guide) OPTION_INT('C', "cylinders", "Cylinders") OPTION_INT('H', "heads", "Heads") OPTION_INT('S', "sectors", "Sectors") OPTION_INT('L', "sectorlength", "Sector Words") OPTION_INT('K', "hunksize", "Hunk Bytes") OPTION_GUIDE_END static char const *const dsk_option_spec = "C1-[203]-1024;H1/[2]/4/8;S1-[12]-64;L267;K6408"; // device type definition DEFINE_DEVICE_TYPE(DIABLO, diablo_image_device, "diablo_image", "Diablo") //------------------------------------------------- // diablo_image_device - constructor //------------------------------------------------- diablo_image_device::diablo_image_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : harddisk_image_base_device(mconfig, DIABLO, tag, owner, clock) , m_chd(nullptr) , m_hard_disk_handle() , m_device_image_load(*this) , m_device_image_unload(*this) , m_interface(nullptr) { } //------------------------------------------------- // diablo_image_device - destructor //------------------------------------------------- diablo_image_device::~diablo_image_device() { } //------------------------------------------------- // device_config_complete - perform any // operations now that the configuration is // complete //------------------------------------------------- void diablo_image_device::device_config_complete() { add_format("chd", "CHD Hard drive", "chd,dsk", dsk_option_spec); } const util::option_guide &diablo_image_device::create_option_guide() const { return dsk_option_guide; } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void diablo_image_device::device_start() { m_device_image_load.resolve(); m_device_image_unload.resolve(); m_chd = nullptr; // try to locate the CHD from a DISK_REGION chd_file *handle = machine().rom_load().get_disk_handle(tag()); if (handle) m_hard_disk_handle.reset(new hard_disk_file(handle)); else m_hard_disk_handle.reset(); } void diablo_image_device::device_stop() { m_hard_disk_handle.reset(); } std::pair diablo_image_device::call_load() { std::error_condition our_result; our_result = internal_load_dsk(); /* Check if there is an image_load callback defined */ if (!m_device_image_load.isnull()) { /* Let the override do some additional work/checks */ our_result = m_device_image_load(*this); } return std::make_pair(our_result, std::string()); } std::pair diablo_image_device::call_create(int create_format, util::option_resolution *create_args) { if (!create_args) throw emu_fatalerror("diablo_image_device::call_create: Expected create_args to not be nullptr"); const uint32_t cylinders = create_args->lookup_int('C'); const uint32_t heads = create_args->lookup_int('H'); const uint32_t sectors = create_args->lookup_int('S'); const uint32_t sectorsize = create_args->lookup_int('L') * sizeof(uint16_t); const uint32_t hunksize = create_args->lookup_int('K'); const uint32_t totalsectors = cylinders * heads * sectors; /* create the CHD file */ chd_codec_type compression[4] = { CHD_CODEC_NONE }; util::core_file::ptr proxy; std::error_condition err = util::core_file::open_proxy(image_core_file(), proxy); if (!err) m_origchd.create(std::move(proxy), uint64_t(totalsectors) * uint64_t(sectorsize), hunksize, sectorsize, compression); if (err) return std::make_pair(err, std::string()); /* if we created the image and hence, have metadata to set, set the metadata */ err = m_origchd.write_metadata(HARD_DISK_METADATA_TAG, 0, string_format(HARD_DISK_METADATA_FORMAT, cylinders, heads, sectors, sectorsize)); m_origchd.close(); if (err) return std::make_pair(err, std::string()); return std::make_pair(internal_load_dsk(), std::string()); } void diablo_image_device::call_unload() { // Check if there is an image_unload callback defined if (!m_device_image_unload.isnull()) m_device_image_unload(*this); m_hard_disk_handle.reset(); m_origchd.close(); m_diffchd.close(); m_chd = nullptr; } /*------------------------------------------------- open_disk_diff - open a DISK diff file -------------------------------------------------*/ static std::error_condition open_disk_diff(emu_options &options, const char *name, chd_file &source, chd_file &diff_chd) { std::string fname = std::string(name).append(".dif"); /* try to open the diff */ //printf("Opening differencing image file: %s\n", fname.c_str()); emu_file diff_file(options.diff_directory(), OPEN_FLAG_READ | OPEN_FLAG_WRITE); std::error_condition filerr = diff_file.open(fname); if (!filerr) { std::string fullpath(diff_file.fullpath()); diff_file.close(); //printf("Opening differencing image file: %s\n", fullpath.c_str()); return diff_chd.open(fullpath, true, &source); } /* didn't work; try creating it instead */ //printf("Creating differencing image: %s\n", fname.c_str()); diff_file.set_openflags(OPEN_FLAG_READ | OPEN_FLAG_WRITE | OPEN_FLAG_CREATE | OPEN_FLAG_CREATE_PATHS); filerr = diff_file.open(fname); if (!filerr) { std::string fullpath(diff_file.fullpath()); diff_file.close(); /* create the CHD */ //printf("Creating differencing image file: %s\n", fullpath.c_str()); chd_codec_type compression[4] = { CHD_CODEC_NONE }; std::error_condition err = diff_chd.create(fullpath, source.logical_bytes(), source.hunk_bytes(), compression, source); if (err) return err; return diff_chd.clone_all_metadata(source); } return std::errc::no_such_file_or_directory; } std::error_condition diablo_image_device::internal_load_dsk() { std::error_condition err; m_chd = nullptr; m_hard_disk_handle.reset(); // open the CHD file if (loaded_through_softlist()) { m_chd = device().machine().rom_load().get_disk_handle(device().subtag("harddriv").c_str()); } else { util::core_file::ptr proxy; err = util::core_file::open_proxy(image_core_file(), proxy); if (!err) err = m_origchd.open(std::move(proxy), true); if (!err) { m_chd = &m_origchd; } else if (err == chd_file::error::FILE_NOT_WRITEABLE) { err = util::core_file::open_proxy(image_core_file(), proxy); if (!err) err = m_origchd.open(std::move(proxy), false); if (!err) { err = open_disk_diff(device().machine().options(), basename_noext(), m_origchd, m_diffchd); if (!err) { m_chd = &m_diffchd; } } } } if (m_chd) { // open the hard disk file m_hard_disk_handle.reset(new hard_disk_file(m_chd)); if (m_hard_disk_handle) return std::error_condition(); } // if we had an error, close out the CHD m_origchd.close(); m_diffchd.close(); m_chd = nullptr; return err ? err : image_error::UNSPECIFIED; }