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  • CentOS 6 bochs-2.6 gdb 调试 linux 0.11——bochsrc-hdc-gdb.bxrc

    gdbstub: enabled=1, port=1234, text_base=0, data_base=0, bss_base=0

    # You may now use double quotes around pathnames, in case
    # your pathname includes spaces.

    #=======================================================================
    # PLUGIN_CTRL:
    # Controls the presence of optional device plugins. These plugins are loaded
    # directly with this option and some of them install a config option that is
    # only available when the plugin device is loaded. The value "1" means to load
    # the plugin and "0" will unload it (if loaded before).
    #
    # These plugins will be loaded by default (if present): 'biosdev', 'extfpuirq',
    # 'gameport', 'iodebug','parallel', 'serial', 'speaker' and 'unmapped'.
    #
    # These plugins are also supported, but they are usually loaded directly with
    # their bochsrc option: 'e1000', 'es1370', 'ne2k', 'pcidev', 'pcipnic', 'sb16',
    # 'usb_ohci', 'usb_uhci' and 'usb_xhci'.
    #=======================================================================
    #plugin_ctrl: unmapped=0, e1000=1 # unload 'unmapped' and load 'e1000'

    #=======================================================================
    # CONFIG_INTERFACE
    #
    # The configuration interface is a series of menus or dialog boxes that
    # allows you to change all the settings that control Bochs's behavior.
    # Depending on the platform there are up to 3 choices of configuration
    # interface: a text mode version called "textconfig" and two graphical versions
    # called "win32config" and "wx".  The text mode version uses stdin/stdout and
    # is always compiled in, unless Bochs is compiled for wx only. The choice
    # "win32config" is only available on win32 and it is the default there.
    # The choice "wx" is only available when you use "--with-wx" on the configure
    # command.  If you do not write a config_interface line, Bochs will
    # choose a default for you.
    #
    # NOTE: if you use the "wx" configuration interface, you must also use
    # the "wx" display library.
    #=======================================================================
    #config_interface: textconfig
    #config_interface: win32config
    #config_interface: wx

    #=======================================================================
    # DISPLAY_LIBRARY
    #
    # The display library is the code that displays the Bochs VGA screen.  Bochs
    # has a selection of about 10 different display library implementations for
    # different platforms.  If you run configure with multiple --with-* options,
    # the display_library command lets you choose which one you want to run with.
    # If you do not write a display_library line, Bochs will choose a default for
    # you.
    #
    # The choices are:
    #   x              use X windows interface, cross platform
    #   win32          use native win32 libraries
    #   carbon         use Carbon library (for MacOS X)
    #   macintosh      use MacOS pre-10
    #   amigaos        use native AmigaOS libraries
    #   sdl            use SDL library, cross platform
    #   svga           use SVGALIB library for Linux, allows graphics without X11
    #   term           text only, uses curses/ncurses library, cross platform
    #   rfb            provides an interface to AT&T's VNC viewer, cross platform
    #   wx             use wxWidgets library, cross platform
    #   nogui          no display at all
    #
    # NOTE: if you use the "wx" configuration interface, you must also use
    # the "wx" display library.
    #
    # Specific options:
    # Some display libraries now support specific options to control their
    # behaviour. These options are supported by more than one display library:
    #
    # "gui_debug"   - use GTK debugger gui (sdl, x) / Win32 debugger gui (sdl, win32)
    # "hideIPS"     - disable IPS output in status bar (rfb, sdl, win32, wx, x)
    # "nokeyrepeat" - turn off host keyboard repeat (sdl, win32, x)
    #
    # See the examples below for other currently supported options.
    #=======================================================================
    #display_library: amigaos
    #display_library: carbon
    #display_library: macintosh
    #display_library: nogui
    #display_library: rfb, options="timeout=60" # time to wait for client
    #display_library: sdl, options="fullscreen" # startup in fullscreen mode
    #display_library: term
    #display_library: win32
    #display_library: wx
    #display_library: x

    #=======================================================================
    # ROMIMAGE:
    # The ROM BIOS controls what the PC does when it first powers on.
    # Normally, you can use a precompiled BIOS in the source or binary
    # distribution called BIOS-bochs-latest. The ROM BIOS is usually loaded
    # starting at address 0xf0000, and it is exactly 64k long. Another option
    # is 128k BIOS which is loaded at address 0xe0000.
    # You can also use the environment variable $BXSHARE to specify the
    # location of the BIOS.
    # The usage of external large BIOS images (up to 512k) at memory top is
    # now supported, but we still recommend to use the BIOS distributed with
    # Bochs. The start address optional, since it can be calculated from image size.
    #=======================================================================
    romimage: file=/usr/local/share/bochs/BIOS-bochs-latest
    #romimage: file=bios/seabios-1.6.3.bin
    #romimage: file=mybios.bin, address=0xfff80000 # 512k at memory top

    #=======================================================================
    # CPU:
    # This defines cpu-related parameters inside Bochs:
    #
    #  MODEL:
    #    Selects CPU configuration to emulate from pre-defined list of all
    #    supported configurations. When this option is used, the CPUID option
    #    has no effect anymore.
    #
    #  CPU configurations that can be selected:
    # -----------------------------------------------------------------
    #  pentium_mmx                Intel Pentium MMX
    #  amd_k6_2_chomper           AMD-K6(tm) 3D processor (Chomper)
    #  p2_klamath                 Intel Pentium II (Klamath)
    #  p3_katmai                  Intel Pentium III (Katmai)
    #  p4_willamette              Intel(R) Pentium(R) 4 (Willamette)
    #  core_duo_t2400_yonah       Intel(R) Core(TM) Duo CPU T2400 (Yonah)
    #  atom_n270                  Intel(R) Atom(TM) CPU N270
    #  athlon64_clawhammer        AMD Athlon(tm) 64 Processor 2800+ (Clawhammer)
    #  athlon64_venice            AMD Athlon(tm) 64 Processor 3000+ (Venice)
    #  turion64_tyler             AMD Turion(tm) 64 X2 Mobile TL-60 (Tyler)
    #  phenom_8650_toliman        AMD Phenom X3 8650 (Toliman)
    #  p4_prescott_celeron_336    Intel(R) Celeron(R) 336 (Prescott)
    #  core2_penryn_t9600         Intel Mobile Core 2 Duo T9600 (Penryn)
    #  corei5_lynnfield_750       Intel(R) Core(TM) i5   750 (Lynnfield)
    #  corei5_arrandale_m520      Intel(R) Core(TM) i5 M 520 (Arrandale)
    #  corei7_sandy_bridge_2600k  Intel(R) Core(TM) i7-2600K (Sandy Bridge)
    #  corei7_ivy_bridge_3770k    Intel(R) Core(TM) i7-3770K CPU (Ivy Bridge)
    #
    #  COUNT:
    #    Set the number of processors:cores per processor:threads per core
    #    when Bochs is compiled for SMP emulation.
    #    Bochs currently supports up to 8 threads running simultaniosly.
    #    If Bochs is compiled without SMP support, it won't accept values
    #    different from 1.
    #
    #  QUANTUM:
    #    Maximum amount of instructions allowed to execute by processor before
    #    returning control to another cpu. This option exists only in Bochs
    #    binary compiled with SMP support.
    #
    #  RESET_ON_TRIPLE_FAULT:
    #    Reset the CPU when triple fault occur (highly recommended) rather than
    #    PANIC. Remember that if you trying to continue after triple fault the
    #    simulation will be completely bogus !
    #
    #  CPUID_LIMIT_WINNT:
    #    Determine whether to limit maximum CPUID function to 2. This mode is
    #    required to workaround WinNT installation and boot issues.
    #
    #  MSRS:
    #    Define path to user CPU Model Specific Registers (MSRs) specification.
    #    See example in msrs.def.
    #
    #  IGNORE_BAD_MSRS:
    #    Ignore MSR references that Bochs does not understand; print a warning
    #    message instead of generating #GP exception. This option is enabled
    #    by default but will not be avaiable if configurable MSRs are enabled.
    #
    #  MWAIT_IS_NOP:
    #    When this option is enabled MWAIT will not put the CPU into a sleep state.
    #    This option exists only if Bochs compiled with --enable-monitor-mwait.
    #
    #  IPS:
    #    Emulated Instructions Per Second. This is the number of IPS that bochs
    #    is capable of running on your machine. You can recompile Bochs with
    #    --enable-show-ips option enabled, to find your host's capability.
    #    Measured IPS value will then be logged into your log file or shown
    #    in the status bar (if supported by the gui).
    #
    #    IPS is used to calibrate many time-dependent events within the bochs
    #    simulation.  For example, changing IPS affects the frequency of VGA
    #    updates, the duration of time before a key starts to autorepeat, and
    #    the measurement of BogoMips and other benchmarks.
    #
    #  Examples:
    #
    #  Bochs Machine/Compiler                                 Mips
    # ______________________________________________________________________
    #  2.4.6 3.4Ghz Intel Core i7 2600 with Win7x64/g++ 4.5.2 85 to 95 Mips
    #  2.3.7 3.2Ghz Intel Core 2 Q9770 with WinXP/g++ 3.4     50 to 55 Mips
    #  2.3.7 2.6Ghz Intel Core 2 Duo with WinXP/g++ 3.4       38 to 43 Mips
    #  2.2.6 2.6Ghz Intel Core 2 Duo with WinXP/g++ 3.4       21 to 25 Mips
    #  2.2.6 2.1Ghz Athlon XP with Linux 2.6/g++ 3.4          12 to 15 Mips
    #=======================================================================
    #cpu: model=core2_penryn_t9600, count=1, ips=50000000, reset_on_triple_fault=1, ignore_bad_msrs=1, msrs="msrs.def"
    #cpu: cpuid_limit_winnt=0

    #=======================================================================
    # CPUID:
    #
    # This defines features and functionality supported by Bochs emulated CPU.
    # The option has no offect if CPU model was selected in CPU option.
    #
    #  MMX:
    #    Select MMX instruction set support.
    #    This option exists only if Bochs compiled with BX_CPU_LEVEL >= 5.
    #
    #  APIC:
    #    Select APIC configuration (LEGACY/XAPIC/XAPIC_EXT/X2APIC).
    #    This option exists only if Bochs compiled with BX_CPU_LEVEL >= 5.
    #
    #  SEP:
    #    Select SYSENTER/SY***IT instruction set support.
    #    This option exists only if Bochs compiled with BX_CPU_LEVEL >= 6.
    #
    #  SSE:
    #    Select SSE instruction set support.
    #    Any of NONE/SSE/SSE2/SSE3/SSSE3/SSE4_1/SSE4_2 could be selected.
    #    This option exists only if Bochs compiled with BX_CPU_LEVEL >= 6.
    #
    #  SSE4A:
    #    Select AMD SSE4A instructions support.
    #    This option exists only if Bochs compiled with BX_CPU_LEVEL >= 6.
    #
    #  AES:
    #    Select AES instruction set support.
    #    This option exists only if Bochs compiled with BX_CPU_LEVEL >= 6.
    #
    #  MOVBE:
    #    Select MOVBE Intel(R) Atom instruction support.
    #    This option exists only if Bochs compiled with BX_CPU_LEVEL >= 6.
    #
    #  ADX:
    #    Select ADCX/ADOX instructions support.
    #    This option exists only if Bochs compiled with BX_CPU_LEVEL >= 6.
    #
    #  XSAVE:
    #    Select XSAVE extensions support.
    #    This option exists only if Bochs compiled with BX_CPU_LEVEL >= 6.
    #
    #  XSAVEOPT:
    #    Select XSAVEOPT instruction support.
    #    This option exists only if Bochs compiled with BX_CPU_LEVEL >= 6.
    #
    #  AVX:
    #    Select AVX/AVX2 instruction set support.
    #    This option exists only if Bochs compiled with --enable-avx option.
    #
    #  AVX_F16C:
    #    Select AVX float16 convert instructions support.
    #    This option exists only if Bochs compiled with --enable-avx option.
    #
    #  AVX_FMA:
    #    Select AVX fused multiply add (FMA) instructions support.
    #    This option exists only if Bochs compiled with --enable-avx option.
    #
    #  BMI:
    #    Select BMI1/BMI2 instructions support.
    #    This option exists only if Bochs compiled with --enable-avx option.
    #
    #  XOP:
    #    Select AMD XOP instructions support.
    #    This option exists only if Bochs compiled with --enable-avx option.
    #
    #  FMA4:
    #    Select AMD four operand FMA instructions support.
    #    This option exists only if Bochs compiled with --enable-avx option.
    #
    #  TBM:
    #    Select AMD Trailing Bit Manipulation (TBM) instructions support.
    #    This option exists only if Bochs compiled with --enable-avx option.
    #
    #  X86-64:
    #    Enable x86-64 and long mode support.
    #    This option exists only if Bochs compiled with x86-64 support.
    #
    #  1G_PAGES:
    #    Enable 1G page size support in long mode.
    #    This option exists only if Bochs compiled with x86-64 support.
    #
    #  PCID:
    #    Enable Process-Context Identifiers (PCID) support in long mode.
    #    This option exists only if Bochs compiled with x86-64 support.
    #
    #  FSGSBASE:
    #    Enable GS/GS BASE access instructions support in long mode.
    #    This option exists only if Bochs compiled with x86-64 support.
    #
    #  SMEP:
    #    Enable Supervisor Mode Execution Protection (SMEP) support.
    #    This option exists only if Bochs compiled with BX_CPU_LEVEL >= 6.
    #
    #  MWAIT:
    #    Select MONITOR/MWAIT instructions support.
    #    This option exists only if Bochs compiled with --enable-monitor-mwait.
    #
    #  VMX:
    #    Select VMX extensions emulation support.
    #    This option exists only if Bochs compiled with --enable-vmx option.
    #
    #  VENDOR_STRING:
    #    Set the CPUID vendor string returned by CPUID(0x0). This should be a
    #    twelve-character ASCII string. 
    #
    #  BRAND_STRING:
    #    Set the CPUID vendor string returned by CPUID(0x80000002 .. 0x80000004). 
    #    This should be at most a forty-eight-character ASCII string. 
    #
    #  FAMILY:
    #    Set model information returned by CPUID. Default family value determined
    #    by configure option --enable-cpu-level.
    #
    #  MODEL:
    #    Set model information returned by CPUID. Default model value is 3.
    #
    #  STEPPING:
    #    Set stepping information returned by CPUID. Default stepping value is 3.
    #=======================================================================
    #cpuid: x86_64=1, mmx=1, sep=1, sse=sse4_2, apic=xapic, aes=1, movbe=1, xsave=1
    #cpuid: family=6, model=0x1a, stepping=5

    #=======================================================================
    # MEMORY
    # Set the amount of physical memory you want to emulate.
    #
    # GUEST:
    # Set amount of guest physical memory to emulate. The default is 32MB,
    # the maximum amount limited only by physical address space limitations.
    #
    # HOST:
    # Set amount of host memory you want to allocate for guest RAM emulation.
    # It is possible to allocate less memory than you want to emulate in guest
    # system. This will fake guest to see the non-existing memory. Once guest
    # system touches new memory block it will be dynamically taken from the
    # memory pool. You will be warned (by FATAL PANIC) in case guest already
    # used all allocated host memory and wants more.
    #
    #=======================================================================
    memory: guest=512, host=256

    #=======================================================================
    # OPTROMIMAGE[1-4]:
    # You may now load up to 4 optional ROM images. Be sure to use a
    # read-only area, typically between C8000 and EFFFF. These optional
    # ROM images should not overwrite the rombios (located at
    # F0000-FFFFF) and the videobios (located at C0000-C7FFF).
    # Those ROM images will be initialized by the bios if they contain
    # the right signature (0x55AA) and a valid checksum.
    # It can also be a convenient way to upload some arbitrary code/data
    # in the simulation, that can be retrieved by the boot loader
    #=======================================================================
    #optromimage1: file=optionalrom.bin, address=0xd0000
    #optromimage2: file=optionalrom.bin, address=0xd1000
    #optromimage3: file=optionalrom.bin, address=0xd2000
    #optromimage4: file=optionalrom.bin, address=0xd3000

    #optramimage1: file=/path/file1.img, address=0x0010000
    #optramimage2: file=/path/file2.img, address=0x0020000
    #optramimage3: file=/path/file3.img, address=0x0030000
    #optramimage4: file=/path/file4.img, address=0x0040000

    #=======================================================================
    # VGAROMIMAGE
    # You now need to load a VGA ROM BIOS into C0000.
    #=======================================================================
    #vgaromimage: file=bios/VGABIOS-elpin-2.40
    vgaromimage: file=/usr/local/share/bochs/VGABIOS-lgpl-latest
    #vgaromimage: file=bios/VGABIOS-lgpl-latest-cirrus

    #=======================================================================
    # VGA:
    # This defines parameters related to the VGA display
    #
    #   EXTENSION
    #     Here you can specify the display extension to be used. With the value
    #     'none' you can use standard VGA with no extension. Other supported
    #     values are 'vbe' for Bochs VBE and 'cirrus' for Cirrus SVGA support.
    #
    #   UPDATE_FREQ
    #     The VGA update frequency is based on the emulated clock and the default
    #     value is 5. Keep in mind that you must tweak the 'cpu: ips=N' directive
    #     to be as close to the number of emulated instructions-per-second your
    #     workstation can do, for this to be accurate. If the realtime sync is
    #     enabled with the 'clock' option, the value is based on the real time.
    #     This parameter can be changed at runtime.
    #
    # Examples:
    #   vga: extension=cirrus, update_freq=10
    #=======================================================================
    #vga: extension=vbe, update_freq=5

    #=======================================================================
    # FLOPPYA:
    # Point this to pathname of floppy image file or device
    # This should be of a bootable floppy(image/device) if you're
    # booting from 'a' (or 'floppy').
    #
    # You can set the initial status of the media to 'ejected' or 'inserted'.
    #   floppya: 2_88=path, status=ejected    (2.88M 3.5"  media)
    #   floppya: 1_44=path, status=inserted   (1.44M 3.5"  media)
    #   floppya: 1_2=path, status=ejected     (1.2M  5.25" media)
    #   floppya: 720k=path, status=inserted   (720K  3.5"  media)
    #   floppya: 360k=path, status=inserted   (360K  5.25" media)
    #   floppya: 320k=path, status=inserted   (320K  5.25" media)
    #   floppya: 180k=path, status=inserted   (180K  5.25" media)
    #   floppya: 160k=path, status=inserted   (160K  5.25" media)
    #   floppya: image=path, status=inserted  (guess media type from image size)
    #   floppya: 1_44=vvfat:path, status=inserted  (use directory as VFAT media)
    #   floppya: type=1_44                    (1.44M 3.5" floppy drive, no media)
    #
    # The path should be the name of a disk image file.  On Unix, you can use a raw
    # device name such as /dev/fd0 on Linux.  On win32 platforms, use drive letters
    # such as a: or b: as the path.  The parameter 'image' works with image files
    # only. In that case the size must match one of the supported types.
    # The parameter 'type' can be used to enable the floppy drive without media
    # and status specified. Usually the drive type is set up based on the media type.
    # The optional parameter 'write_protected' can be used to control the media
    # write protect switch. By default it is turned off.
    #=======================================================================
    #floppya: 1_44=/dev/fd0, status=inserted
    #floppya: image=../1.44, status=inserted
    #floppya: 1_44=/dev/fd0H1440, status=inserted
    #floppya: 1_2=../1_2, status=inserted
    #floppya: 1_44=a:, status=inserted
    #floppya: 1_44=a.img, status=inserted, write_protected=1
    #floppya: 1_44=/dev/rfd0a, status=inserted

    floppya: 1_44=linux/Image-hdc, status=inserted

    #=======================================================================
    # FLOPPYB:
    # See FLOPPYA above for syntax
    #=======================================================================
    #floppyb: 1_44=b:, status=inserted
    #floppyb: 1_44=b.img, status=inserted

    floppyb: 1_44=rootimage-0.11-20040305, status=inserted

    #=======================================================================
    # ATA0, ATA1, ATA2, ATA3
    # ATA controller for hard disks and cdroms
    #
    # ata[0-3]: enabled=[0|1], ioaddr1=addr, ioaddr2=addr, irq=number
    #
    # These options enables up to 4 ata channels. For each channel
    # the two base io addresses and the irq must be specified.
    #
    # ata0 and ata1 are enabled by default with the values shown below
    #
    # Examples:
    #   ata0: enabled=1, ioaddr1=0x1f0, ioaddr2=0x3f0, irq=14
    #   ata1: enabled=1, ioaddr1=0x170, ioaddr2=0x370, irq=15
    #   ata2: enabled=1, ioaddr1=0x1e8, ioaddr2=0x3e0, irq=11
    #   ata3: enabled=1, ioaddr1=0x168, ioaddr2=0x360, irq=9
    #=======================================================================
    #ata0: enabled=1, ioaddr1=0x1f0, ioaddr2=0x3f0, irq=14
    #ata1: enabled=1, ioaddr1=0x170, ioaddr2=0x370, irq=15
    #ata2: enabled=0, ioaddr1=0x1e8, ioaddr2=0x3e0, irq=11
    #ata3: enabled=0, ioaddr1=0x168, ioaddr2=0x360, irq=9

    #=======================================================================
    # ATA[0-3]-MASTER, ATA[0-3]-SLAVE
    #
    # This defines the type and characteristics of all attached ata devices:
    #   type=       type of attached device [disk|cdrom]
    #   mode=       only valid for disks [flat|concat|external|dll|sparse|vmware3]
    #                                    [vmware4|undoable|growing|volatile|vpc|vvfat]
    #   path=       path of the image / directory
    #   cylinders=  only valid for disks
    #   heads=      only valid for disks
    #   spt=        only valid for disks
    #   status=     only valid for cdroms [inserted|ejected]
    #   biosdetect= type of biosdetection [none|auto], only for disks on ata0 [cmos]
    #   translation=type of translation of the bios, only for disks [none|lba|large|rechs|auto]
    #   model=      string returned by identify device command
    #   journal=    optional filename of the redolog for undoable, volatile and vvfat disks
    #
    # Point this at a hard disk image file, cdrom iso file, or physical cdrom
    # device.  To create a hard disk image, try running bximage.  It will help you
    # choose the size and then suggest a line that works with it.
    #
    # In UNIX it may be possible to use a raw device as a Bochs hard disk,
    # but WE DON'T RECOMMEND IT.  In Windows there is no easy way.
    #
    # In windows, the drive letter + colon notation should be used for cdroms.
    # Depending on versions of windows and drivers, you may only be able to
    # access the "first" cdrom in the system.  On MacOSX, use path="drive"
    # to access the physical drive.
    #
    # The path is mandatory for hard disks. Disk geometry autodetection works with
    # images created by bximage if CHS is set to 0/0/0 (cylinders are calculated
    # using  heads=16 and spt=63). For other hard disk images and modes the
    # cylinders, heads, and spt are mandatory. In all cases the disk size reported
    # from the image must be exactly C*H*S*512.
    #
    # Default values are:
    #   mode=flat, biosdetect=auto, translation=auto, model="Generic 1234"
    #
    # The biosdetect option has currently no effect on the bios
    #
    # Examples:
    #   ata0-master: type=disk, mode=flat, path=10M.sample, cylinders=306, heads=4, spt=17
    #   ata0-slave:  type=disk, mode=flat, path=20M.sample, cylinders=615, heads=4, spt=17
    #   ata1-master: type=disk, mode=flat, path=30M.sample, cylinders=615, heads=6, spt=17
    #   ata1-slave:  type=disk, mode=flat, path=46M.sample, cylinders=940, heads=6, spt=17
    #   ata2-master: type=disk, mode=flat, path=62M.sample, cylinders=940, heads=8, spt=17
    #   ata2-slave:  type=disk, mode=flat, path=112M.sample, cylinders=900, heads=15, spt=17
    #   ata3-master: type=disk, mode=flat, path=483M.sample, cylinders=1024, heads=15, spt=63
    #   ata3-slave:  type=cdrom, path=iso.sample, status=inserted
    #=======================================================================
    #ata0-master: type=disk, mode=flat, path="30M.sample"
    #ata0-master: type=disk, mode=flat, path="30M.sample", cylinders=615, heads=6, spt=17

    ata0-master: type=disk, path="hdc-0.11-new.img", mode=flat, cylinders=410, heads=16, spt=38

    #ata0-master: type=disk, mode=flat, path="c.img", cylinders=0 # autodetect
    #ata0-slave: type=disk, mode=vvfat, path=/bochs/images/vvfat, journal=vvfat.redolog
    #ata0-slave: type=cdrom, path=D:, status=inserted
    #ata0-slave: type=cdrom, path=/dev/cdrom, status=inserted
    #ata0-slave: type=cdrom, path="drive", status=inserted
    #ata0-slave: type=cdrom, path=/dev/rcd0d, status=inserted

    #=======================================================================
    # BOOT:
    # This defines the boot sequence. Now you can specify up to 3 boot drives,
    # which can be 'floppy', 'disk', 'cdrom' or 'network' (boot ROM).
    # Legacy 'a' and 'c' are also supported.
    # Examples:
    #   boot: floppy
    #   boot: cdrom, disk
    #   boot: network, disk
    #   boot: cdrom, floppy, disk
    #=======================================================================
    boot: floppy
    #boot: disk

    #=======================================================================
    # CLOCK:
    # This defines the parameters of the clock inside Bochs:
    #
    #  SYNC:
    #  This defines the method how to synchronize the Bochs internal time
    #  with realtime. With the value 'none' the Bochs time relies on the IPS
    #  value and no host time synchronization is used. The 'slowdown' method
    #  sacrifices performance to preserve reproducibility while allowing host
    #  time correlation. The 'realtime' method sacrifices reproducibility to
    #  preserve performance and host-time correlation.
    #  It is possible to enable both synchronization methods.
    #
    #  RTC_SYNC:
    #  If this option is enabled together with the realtime synchronization,
    #  the RTC runs at realtime speed. This feature is disabled by default.
    #
    #  TIME0:
    #  Specifies the start (boot) time of the virtual machine. Use a time
    #  value as returned by the time(2) system call. If no time0 value is
    #  set or if time0 equal to 1 (special case) or if time0 equal 'local',
    #  the simulation will be started at the current local host time.
    #  If time0 equal to 2 (special case) or if time0 equal 'utc',
    #  the simulation will be started at the current utc time.
    #
    # Syntax:
    #  clock: sync=[none|slowdown|realtime|both], time0=[timeValue|local|utc]
    #
    # Example:
    #   clock: sync=none,     time0=local       # Now (localtime)
    #   clock: sync=slowdown, time0=315529200   # Tue Jan  1 00:00:00 1980
    #   clock: sync=none,     time0=631148400   # Mon Jan  1 00:00:00 1990
    #   clock: sync=realtime, time0=938581955   # Wed Sep 29 07:12:35 1999
    #   clock: sync=realtime, time0=946681200   # Sat Jan  1 00:00:00 2000
    #   clock: sync=none,     time0=1           # Now (localtime)
    #   clock: sync=none,     time0=utc         # Now (utc/gmt)
    #
    # Default value are sync=none, time0=local
    #=======================================================================
    #clock: sync=none, time0=local


    #=======================================================================
    # FLOPPY_BOOTSIG_CHECK: disabled=[0|1]
    # Enables or disables the 0xaa55 signature check on boot floppies
    # Defaults to disabled=0
    # Examples:
    #   floppy_bootsig_check: disabled=0
    #   floppy_bootsig_check: disabled=1
    #=======================================================================
    floppy_bootsig_check: disabled=0

    #=======================================================================
    # LOG:
    # Give the path of the log file you'd like Bochs debug and misc. verbiage
    # to be written to. If you don't use this option or set the filename to
    # '-' the output is written to the console. If you really don't want it,
    # make it "/dev/null" (Unix) or "nul" (win32). :^(
    #
    # Examples:
    #   log: ./bochs.out
    #   log: /dev/tty
    #=======================================================================
    #log: /dev/null
    log: bochsout.txt

    #=======================================================================
    # LOGPREFIX:
    # This handles the format of the string prepended to each log line.
    # You may use those special tokens :
    #   %t : 11 decimal digits timer tick
    #   %i : 8 hexadecimal digits of cpu current eip (ignored in SMP configuration)
    #   %e : 1 character event type ('i'nfo, 'd'ebug, 'p'anic, 'e'rror)
    #   %d : 5 characters string of the device, between brackets
    #
    # Default : %t%e%d
    # Examples:
    #   logprefix: %t-%e-@%i-%d
    #   logprefix: %i%e%d
    #=======================================================================
    #logprefix: %t%e%d

    #=======================================================================
    # LOG CONTROLS
    #
    # Bochs has four severity levels for event logging.
    #   panic: cannot proceed.  If you choose to continue after a panic,
    #          don't be surprised if you get strange behavior or crashes.
    #   error: something went wrong, but it is probably safe to continue the
    #          simulation.
    #   info: interesting or useful messages.
    #   debug: messages useful only when debugging the code.  This may
    #          spit out thousands per second.
    #
    # For events of each level, you can choose to exit Bochs ('fatal'), 'report'
    # or 'ignore'. On some guis you have the additional choice 'ask'. A gui dialog
    # appears asks how to proceed.
    #
    # It is also possible to specify the 'action' to do for each Bochs facility
    # separately (e.g. crash on panics from everything except the cdrom, and only
    # report those). See the 'log function' module list in the user documentation.
    #
    # If you are experiencing many panics, it can be helpful to change
    # the panic action to report instead of fatal.  However, be aware
    # that anything executed after a panic is uncharted territory and can
    # cause bochs to become unstable.  The panic is a "graceful exit," so
    # if you disable it you may get a spectacular disaster instead.
    #=======================================================================
    panic: action=ask
    error: action=report
    info: action=report
    #debug: action=ignore, pci=report
    # report BX_DEBUG from module 'pci'

    #=======================================================================
    # DEBUGGER_LOG:
    # Give the path of the log file you'd like Bochs to log debugger output.
    # If you really don't want it, make it /dev/null or '-'. :^(
    #
    # Examples:
    #   debugger_log: ./debugger.out
    #=======================================================================
    #debugger_log: /dev/null
    #debugger_log: debugger.out
    debugger_log: -

    #=======================================================================
    # COM1, COM2, COM3, COM4:
    # This defines a serial port (UART type 16550A). In the 'term' you can specify
    # a device to use as com1. This can be a real serial line, or a pty.  To use
    # a pty (under X/Unix), create two windows (xterms, usually).  One of them will
    # run bochs, and the other will act as com1. Find out the tty the com1
    # window using the `tty' command, and use that as the `dev' parameter.
    # Then do `sleep 1000000' in the com1 window to keep the shell from
    # messing with things, and run bochs in the other window.  Serial I/O to
    # com1 (port 0x3f8) will all go to the other window.
    # In socket* and pipe* (win32 only) modes Bochs becomes either socket/named pipe
    # client or server. In client mode it connects to an already running server (if
    # connection fails Bochs treats com port as not connected). In server mode it
    # opens socket/named pipe and waits until a client application connects to it
    # before starting simulation. This mode is useful for remote debugging (e.g.
    # with gdb's "target remote host:port" command or windbg's command line option
    # -k com:pipe,port=\.pipepipename). Note: 'socket' is a shorthand for
    # 'socket-client' and 'pipe' for 'pipe-client'. Socket modes use simple TCP
    # communication, pipe modes use duplex byte mode pipes.
    # Other serial modes are 'null' (no input/output), 'file' (output to a file
    # specified as the 'dev' parameter), 'raw' (use the real serial port - under
    # construction for win32), 'mouse' (standard serial mouse - requires
    # mouse option setting 'type=serial', 'type=serial_wheel' or 'type=serial_msys').
    #
    # Examples:
    #   com1: enabled=1, mode=null
    #   com1: enabled=1, mode=mouse
    #   com2: enabled=1, mode=file, dev=serial.out
    #   com3: enabled=1, mode=raw, dev=com1
    #   com3: enabled=1, mode=socket-client, dev=localhost:8888
    #   com3: enabled=1, mode=socket-server, dev=localhost:8888
    #   com4: enabled=1, mode=pipe-client, dev=\.pipemypipe
    #   com4: enabled=1, mode=pipe-server, dev=\.pipemypipe
    #=======================================================================
    #com1: enabled=1, mode=term, dev=/dev/ttyp9


    #=======================================================================
    # PARPORT1, PARPORT2:
    # This defines a parallel (printer) port. When turned on and an output file is
    # defined the emulated printer port sends characters printed by the guest OS
    # into the output file. On some platforms a device filename can be used to
    # send the data to the real parallel port (e.g. "/dev/lp0" on Linux, "lpt1" on
    # win32 platforms).
    #
    # Examples:
    #   parport1: enabled=1, file="parport.out"
    #   parport2: enabled=1, file="/dev/lp0"
    #   parport1: enabled=0
    #=======================================================================
    parport1: enabled=1, file="parport.out"

    #=======================================================================
    # SB16:
    # This defines the SB16 sound emulation. It can have several of the
    # following properties.
    # All properties are in the format sb16: property=value
    # enabled:
    #      This optional property controls the presence of the SB16 emulation.
    #      The emulation is turned on unless this property is used and set to 0.
    # midi: The filename is where the midi data is sent. This can be a
    #       device or just a file if you want to record the midi data.
    # midimode:
    #      0=no data
    #      1=output to device (system dependent. midi denotes the device driver)
    #      2=SMF file output, including headers
    #      3=output the midi data stream to the file (no midi headers and no
    #        delta times, just command and data bytes)
    # wave: This is the device/file where wave output is stored
    # wavemode:
    #      0=no data
    #      1=output to device (system dependent. wave denotes the device driver)
    #      2=VOC file output, incl. headers
    #      3=output the raw wave stream to the file
    # log:  The file to write the sb16 emulator messages to.
    # loglevel:
    #      0=no log
    #      1=resource changes, midi program and bank changes
    #      2=severe errors
    #      3=all errors
    #      4=all errors plus all port accesses
    #      5=all errors and port accesses plus a lot of extra info
    # dmatimer:
    #      microseconds per second for a DMA cycle.  Make it smaller to fix
    #      non-continuous sound.  750000 is usually a good value.  This needs a
    #      reasonably correct setting for the IPS parameter of the CPU option.
    #
    # Examples for output devices:
    #   sb16: midimode=1, midi="", wavemode=1, wave=""           # win32
    #   sb16: midimode=1, midi=alsa:128:0, wavemode=1, wave=alsa # Linux with ALSA
    #   sb16: wavemode=1, wave=sdl # use SDL audio (if present) for output
    #=======================================================================
    #sb16: midimode=1, midi=/dev/midi00, wavemode=1, wave=/dev/dsp, loglevel=2, log=sb16.log, dmatimer=600000

    #=======================================================================
    # ES1370:
    # This defines the ES1370 sound emulation. The parameter 'enabled' controls the
    # presence of the device. The 'wavedev' parameter is similar to the 'wave'
    # parameter of the SB16 soundcard. The emulation supports recording and playback
    # (except DAC1+DAC2 output at the same time).
    #
    # Examples:
    #   es1370: enabled=1, wavedev=""    # win32
    #   es1370: enabled=1, wavedev=alsa  # Linux with ALSA
    #   es1370: enabled=1, wavedev=sdl   # use SDL audio (if present) for output
    #=======================================================================
    #es1370: enabled=1, wavedev=alsa

    #=======================================================================
    # KEYBOARD:
    # This defines parameters related to the emulated keyboard
    #
    #   TYPE:
    #     Type of keyboard return by a "identify keyboard" command to the
    #     keyboard controller. It must be one of "xt", "at" or "mf".
    #     Defaults to "mf". It should be ok for almost everybody. A known
    #     exception is french macs, that do have a "at"-like keyboard.
    #
    #   SERIAL_DELAY:
    #     Approximate time in microseconds that it takes one character to
    #     be transferred from the keyboard to controller over the serial path.
    #
    #   PASTE_DELAY:
    #     Approximate time in microseconds between attempts to paste
    #     characters to the keyboard controller. This leaves time for the
    #     guest os to deal with the flow of characters.  The ideal setting
    #     depends on how your operating system processes characters.  The
    #     default of 100000 usec (.1 seconds) was chosen because it works
    #     consistently in Windows.
    #     If your OS is losing characters during a paste, increase the paste
    #     delay until it stops losing characters.
    #
    #   KEYMAP:
    #     This enables a remap of a physical localized keyboard to a
    #     virtualized us keyboard, as the PC architecture expects.
    #
    # Examples:
    #   keyboard: type=mf, serial_delay=200, paste_delay=100000
    #   keyboard: keymap=gui/keymaps/x11-pc-de.map
    #=======================================================================
    #keyboard: type=mf, serial_delay=250

    #=======================================================================
    # MOUSE:
    # This defines parameters for the emulated mouse type, the initial status
    # of the mouse capture and the runtime method to toggle it.
    #
    #  TYPE:
    #  With the mouse type option you can select the type of mouse to emulate.
    #  The default value is 'ps2'. The other choices are 'imps2' (wheel mouse
    #  on PS/2), 'serial', 'serial_wheel' and 'serial_msys' (one com port requires
    #  setting 'mode=mouse'). To connect a mouse to an USB port, see the 'usb_uhci',
    #  'usb_ohci' or 'usb_xhci' options (requires PCI and USB support).
    #
    #  ENABLED:
    #  The Bochs gui creates mouse "events" unless the 'enabled' option is
    #  set to 0. The hardware emulation itself is not disabled by this.
    #  Unless you have a particular reason for enabling the mouse by default,
    #  it is recommended that you leave it off. You can also toggle the mouse
    #  usage at runtime (RFB, SDL, Win32, wxWidgets and X11 - see below).
    #
    #  TOGGLE:
    #  The default method to toggle the mouse capture at runtime is to press the
    #  CTRL key and the middle mouse button ('ctrl+mbutton'). This option allows
    #  to change the method to 'ctrl+f10' (like DOSBox), 'ctrl+alt' (like QEMU)
    #  or 'f12' (replaces win32 'legacyF12' option).
    #
    # Examples:
    #   mouse: enabled=1
    #   mouse: type=imps2, enabled=1
    #   mouse: type=serial, enabled=1
    #   mouse: enabled=0, toggle=ctrl+f10
    #=======================================================================
    mouse: enabled=0

    #=======================================================================
    # private_colormap: Request that the GUI create and use it's own
    #                   non-shared colormap.  This colormap will be used
    #                   when in the bochs window.  If not enabled, a
    #                   shared colormap scheme may be used.  Not implemented
    #                   on all GUI's.
    #
    # Examples:
    #   private_colormap: enabled=1
    #   private_colormap: enabled=0
    #=======================================================================
    private_colormap: enabled=0

    #=======================================================================
    # fullscreen: ONLY IMPLEMENTED ON AMIGA
    #             Request that Bochs occupy the entire screen instead of a
    #             window.
    #
    # Examples:
    #   fullscreen: enabled=0
    #   fullscreen: enabled=1
    #=======================================================================
    #fullscreen: enabled=0
    #screenmode: name="sample"

    #=======================================================================
    # ne2k: NE2000 compatible ethernet adapter
    #
    # Format:
    # ne2k: enabled=1, ioaddr=IOADDR, irq=IRQ, mac=MACADDR, ethmod=MODULE,
    #       ethdev=DEVICE, script=SCRIPT, bootrom=BOOTROM
    #
    # IOADDR, IRQ: You probably won't need to change ioaddr and irq, unless there
    # are IRQ conflicts. These arguments are ignored when assign the ne2k to a
    # PCI slot.
    #
    # MAC: The MAC address MUST NOT match the address of any machine on the net.
    # Also, the first byte must be an even number (bit 0 set means a multicast
    # address), and you cannot use ff:ff:ff:ff:ff:ff because that's the broadcast
    # address.  For the ethertap module, you must use fe:fd:00:00:00:01.  There may
    # be other restrictions too.  To be safe, just use the b0:c4... address.
    #
    # ETHDEV: The ethdev value is the name of the network interface on your host
    # platform.  On UNIX machines, you can get the name by running ifconfig.  On
    # Windows machines, you must run niclist to get the name of the ethdev.
    # Niclist source code is in misc/niclist.c and it is included in Windows
    # binary releases.
    #
    # SCRIPT: The script value is optional, and is the name of a script that
    # is executed after bochs initialize the network interface. You can use
    # this script to configure this network interface, or enable masquerading.
    # This is mainly useful for the tun/tap devices that only exist during
    # Bochs execution. The network interface name is supplied to the script
    # as first parameter.
    #
    # BOOTROM: The bootrom value is optional, and is the name of the ROM image
    # to load. Note that this feature is only implemented for the PCI version of
    # the NE2000.
    #
    # If you don't want to make connections to any physical networks,
    # you can use the following 'ethmod's to simulate a virtual network.
    #   null: All packets are discarded, but logged to a few files.
    #   vde:  Virtual Distributed Ethernet
    #   vnet: ARP, ICMP-echo(ping), DHCP and read/write TFTP are simulated.
    #         The virtual host uses 192.168.10.1.
    #         DHCP assigns 192.168.10.2 to the guest.
    #         TFTP uses the 'ethdev' value for the root directory and doesn't
    #         overwrite files.
    #
    #=======================================================================
    # ne2k: ioaddr=0x300, irq=9, mac=fe:fd:00:00:00:01, ethmod=fbsd, ethdev=en0 #macosx
    # ne2k: ioaddr=0x300, irq=9, mac=b0:c4:20:00:00:00, ethmod=fbsd, ethdev=xl0
    # ne2k: ioaddr=0x300, irq=9, mac=b0:c4:20:00:00:00, ethmod=linux, ethdev=eth0
    # ne2k: ioaddr=0x300, irq=9, mac=b0:c4:20:00:00:01, ethmod=win32, ethdev=MYCARD
    # ne2k: ioaddr=0x300, irq=9, mac=fe:fd:00:00:00:01, ethmod=tap, ethdev=tap0
    # ne2k: ioaddr=0x300, irq=9, mac=fe:fd:00:00:00:01, ethmod=tuntap, ethdev=/dev/net/tun0, script=./tunconfig
    # ne2k: ioaddr=0x300, irq=9, mac=b0:c4:20:00:00:01, ethmod=null, ethdev=eth0
    # ne2k: ioaddr=0x300, irq=9, mac=b0:c4:20:00:00:01, ethmod=vde, ethdev="/tmp/vde.ctl"
    # ne2k: ioaddr=0x300, irq=9, mac=b0:c4:20:00:00:01, ethmod=vnet, ethdev="c:/temp"
    # ne2k: mac=b0:c4:20:00:00:01, ethmod=slirp, script=/usr/local/bin/slirp, bootrom=ne2k_pci.rom

    #=======================================================================
    # pcipnic: Bochs/Etherboot pseudo-NIC
    #
    # Format:
    # pcipnic: enabled=1, mac=MACADDR, ethmod=MODULE, ethdev=DEVICE, script=SCRIPT,
    #          bootrom=BOOTROM
    #
    # The pseudo-NIC accepts the same syntax (for mac, ethmod, ethdev, script,
    # bootrom) and supports the same networking modules as the NE2000 adapter.
    #=======================================================================
    #pcipnic: enabled=1, mac=b0:c4:20:00:00:00, ethmod=vnet

    #=======================================================================
    # e1000: Intel(R) 82540EM Gigabit Ethernet adapter
    #
    # Format:
    # e1000: enabled=1, mac=MACADDR, ethmod=MODULE, ethdev=DEVICE, script=SCRIPT
    #        bootrom=BOOTROM
    #
    # The E1000 accepts the same syntax (for mac, ethmod, ethdev, script, bootrom)
    # and supports the same networking modules as the NE2000 adapter.
    #=======================================================================
    #e1000: enabled=1, mac=52:54:00:12:34:56, ethmod=slirp, script=/usr/local/bin/slirp

    #=======================================================================
    # USER_SHORTCUT:
    # This defines the keyboard shortcut to be sent when you press the "user"
    # button in the headerbar. The shortcut string is a combination of maximum
    # 3 key names (listed below) separated with a '-' character.
    # Valid key names:
    # "alt", "bksl", "bksp", "ctrl", "del", "down", "end", "enter", "esc",
    # "f1", ... "f12", "home", "ins", "left", "menu", "minus", "pgdwn", "pgup",
    # "plus", "right", "shift", "space", "tab", "up", "win", "print" and "power".
    #
    # Example:
    #   user_shortcut: keys=ctrl-alt-del
    #=======================================================================
    #user_shortcut: keys=ctrl-alt-del

    #=======================================================================
    # PCI:
    # This option controls the presence of a PCI chipset in Bochs. Currently it only
    # supports the i440FX chipset. You can also specify the devices connected to
    # PCI slots. Up to 5 slots are available. For these combined PCI/ISA devices
    # assigning to slot is mandatory if you want to emulate the PCI model: cirrus,
    # ne2k and pcivga. These PCI-only devices are also supported, but they are
    # auto-assigned if you don't use the slot configuration: e1000, es1370, pcidev,
    # pcipnic, usb_ohci and usb_xhci.
    #
    # Example:
    #   pci: enabled=1, chipset=i440fx, slot1=pcivga, slot2=ne2k
    #=======================================================================
    pci: enabled=1, chipset=i440fx

    #=======================================================================
    # USB_UHCI:
    # This option controls the presence of the USB root hub which is a part
    # of the i440FX PCI chipset. With the portX parameter you can connect devices
    # to the hub (currently supported: 'mouse', 'tablet', 'keypad', 'disk', 'cdrom'
    # 'hub' and 'printer').
    #
    # The optionsX parameter can be used to assign specific options to the device
    # connected to the corresponding USB port. Currently this feature is only used
    # to set the speed reported by device and by the 'disk' device to specify
    # an alternative redolog file of some image modes.
    #
    # If you connect the mouse or tablet to one of the ports, Bochs forwards the
    # mouse movement data to the USB device instead of the selected mouse type.
    # When connecting the keypad to one of the ports, Bochs forwards the input of
    # the numeric keypad to the USB device instead of the PS/2 keyboard.
    #
    # To connect a 'flat' mode image as an USB hardisk you can use the 'disk' device
    # with the path to the image separated with a colon. To use other disk image modes
    # similar to ATA disks the syntax 'disk:mode:filename' must be used (see below).
    #
    # To emulate an USB cdrom you can use the 'cdrom' device name and the path to
    # an ISO image or raw device name also separated with a colon. An option to
    # insert/eject media is available in the runtime configuration.
    #
    # The device name 'hub' connects an external hub with max. 8 ports (default: 4)
    # to the root hub. To specify the number of ports you have to add the value
    # separated with a colon. Connecting devices to the external hub ports is only
    # available in the runtime configuration.
    #
    # The device 'printer' emulates the HP Deskjet 920C printer. The PCL data is
    # sent to a file specified in bochsrc.txt. The current code appends the PCL
    # code to the file if the file already existed. It would probably be nice to
    # overwrite the file instead, asking user first.
    #=======================================================================
    #usb_uhci: enabled=1
    #usb_uhci: enabled=1, port1=mouse, port2=disk:usbstick.img
    #usb_uhci: enabled=1, port1=hub:7, port2=disk:growing:usbdisk.img
    #usb_uhci: enabled=1, port2=disk:undoable:usbdisk.img, options1=journal:redo.log
    #usb_uhci: enabled=1, port1=printer:printdata.bin, port2=cdrom:image.iso

    #=======================================================================
    # USB_OHCI:
    # This option controls the presence of the USB OHCI host controller with a
    # 2-port hub. The portX option accepts the same device types with the same
    # syntax as the UHCI controller (see above).
    #=======================================================================
    #usb_ohci: enabled=1
    #usb_ohci: enabled=1, port1=printer:usbprinter.bin

    #=======================================================================
    # USB_XHCI:
    # This option controls the presence of the experimental USB xHCI host controller
    # with a 4-port hub. The portX option accepts the same device types with the
    # same syntax as the UHCI controller (see above).
    #=======================================================================
    #usb_xhci: enabled=1

    #=======================================================================
    # CMOSIMAGE:
    # This defines image file that can be loaded into the CMOS RAM at startup.
    # The rtc_init parameter controls whether initialize the RTC with values stored
    # in the image. By default the time0 argument given to the clock option is used.
    # With 'rtc_init=image' the image is the source for the initial time.
    #
    # Example:
    #   cmosimage: file=cmos.img, rtc_init=image
    #=======================================================================
    #cmosimage: file=cmos.img, rtc_init=time0

    #=======================================================================
    # MAGIC_BREAK:
    # This enables the "magic breakpoint" feature when using the debugger.
    # The useless cpu instruction XCHG BX, BX causes Bochs to enter the
    # debugger mode. This might be useful for software development.
    #
    # Example:
    #   magic_break: enabled=1
    #=======================================================================
    #magic_break: enabled=1

    #=======================================================================
    # PORT_E9_HACK:
    # The 0xE9 port doesn't exists in normal ISA architecture. However, we
    # define a convention here, to display on the console of the system running
    # Bochs anything that is written to it. The idea is to provide debug output
    # very early when writing BIOS or OS code for example, without having to
    # bother with setting up a serial port or etc. Reading from port 0xE9 will
    # will return 0xe9 to let you know if the feature is available.
    # Leave this 0 unless you have a reason to use it.
    #
    # Example:
    #   port_e9_hack: enabled=1
    #=======================================================================
    #port_e9_hack: enabled=1

    #=======================================================================
    # DEBUG_SYMBOLS:
    # This loads symbols from the specified file for use in Bochs' internal
    # debugger. Symbols are loaded into global context. This is equivalent to
    # issuing ldsym debugger command at start up.
    #
    # Example:
    #   debug_symbols: file="kernel.sym"
    #   debug_symbols: file="kernel.sym", offset=0x80000000
    #=======================================================================
    #debug_symbols: file="kernel.sym"

    #=======================================================================
    # other stuff
    #=======================================================================
    #load32bitOSImage: os=nullkernel, path=../kernel.img, iolog=../vga_io.log
    #load32bitOSImage: os=linux, path=../linux.img, iolog=../vga_io.log, initrd=../initrd.img
    #print_timestamps: enabled=1

    #-------------------------
    # PCI host device mapping
    #-------------------------
    #pcidev: vendor=0x1234, device=0x5678

    #=======================================================================
    # GDBSTUB:
    # Enable GDB stub. See user documentation for details.
    # Default value is enabled=0.
    #=======================================================================
    #gdbstub: enabled=0, port=1234, text_base=0, data_base=0, bss_base=0

    #=======================================================================
    # USER_PLUGIN:
    # Load user-defined plugin. This option is available only if Bochs is
    # compiled with plugin support. Maximum 8 different plugins are supported.
    # See the example in the Bochs sources how to write a plugin device.
    #=======================================================================
    #user_plugin: name=testdev

    #=======================================================================
    # for Macintosh, use the style of pathnames in the following
    # examples.
    #
    # vgaromimage: :bios:VGABIOS-elpin-2.40
    # romimage: file=:bios:BIOS-bochs-latest, address=0xf0000
    # floppya: 1_44=[fd:], status=inserted
    #=======================================================================

    #=======================================================================
    # MEGS
    # Set the number of Megabytes of physical memory you want to emulate.
    # The default is 32MB, most OS's won't need more than that.
    # The maximum amount of memory supported is 2048Mb.
    # The 'MEGS' option is deprecated. Use 'MEMORY' option instead.
    #=======================================================================
    #megs: 256
    #megs: 128
    #megs: 64
    #megs: 32
    megs: 16
    #megs: 8
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  • 原文地址:https://www.cnblogs.com/ztguang/p/12648211.html
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