Log Message:
dosbox-x: Update to 0.83.1

0.83.1
  - Sound Blaster emulation fixed to better handle Goldplay
    mode detection false positive in 1994 demoscene demo
    myth_dw.zip when using Sound Blaster Pro setting in
    the demo. The initial state before music starts is
    like Goldplay mode, but when music actually starts the
    DMA programmed to normal state without restarting
    DMA playback.
  - dosbox-x.conf is now recognized as the default config
    file name in addition to dosbox.conf. The sample config
    file "dosbox.reference.conf" has been renamed to
    "dosbox-x.reference.conf" as well (Wengier)
  - Tandy DAC output fixed to slowly ramp last sample to
    zero DC sample (128) when switched off. This fixes
    loud popping (DC offset) problems with Tandy DAC
    sound effects in Prince of Persia. This new behavior
    also seems to match real Tandy 1000 hardware according
    to video captures of it's audio/video outputs while
    playing Prince of Persia on it.
  - Tandy/PCjr 3-voice fixed to respond to I/O port 0xC0
    regardless of 8-bit or 16-bit I/O (fixes Prince of
    Persia).
  - Write-protecting a disk image in IMGMOUNT and BOOT
    commands now supported by putting a leading colon (:)
    before the image file name. Works with disk swapping;
    e.g. "BOOT :C:\DISK1.IMG C:\DISK2.IMG" only write-
    protects C:\DISK1.IMG but not C:\DISK2.IMG. The new
    config option "leading colon write protect image" can
    be used to disable or enable this behavior (Wengier)
  - Support for changing DOSBox-X internal time (Wengier)
  - Support for pipes (|), e.g. "DIR | MORE" should now
    work as expected; it is recommended to set the %TEMP%
    (or %TMP%) environment variable to a writable directory
    inside DOSBox-X before using pipes (Wengier)
  - Improved redirections using "<" or ">" (Wengier)
  - Improved Ctrl+C handling in some commands (Wengier)
  - Improved Tab completion in the command shell (Wengier)
  - Improved -get & -set options for the CONFIG command,
    e.g. support for config options with spaces (Wengier)
  - Improved REN (or RENAME) command to support wildcards
    (* and ?) in the source and/or target files (Wengier)
  - Some improvements to commands like MORE & VER (Wengier)
  - Added BREAK, VERIFY and TRUENAME commands as in a real
    DOS system. Type "[command] /?" for help info (Wengier)
  - Implemented FOR command to run a specified command for
    each file in a set of files. Also added LFNFOR command
    to control whether to use long filenames in the FOR
    command as in MS-DOS 7+ (Wengier)
  - Implemented ATTRIB command to view and set attributes
    of files or directories (Wengier)
  - Added emulation of R (readonly) attribute bit for
    Linux and Unix systems through the user-writable
    file mode bits of the filesystem.
  - Fixed PC DOS 2000 crash during installation.
  - PC speaker: Mode 3 (square wave) and a counter value
    of 1 produces a low frequency square wave. Ulrasonic
    frequencies do not begin until count == 2. This fixes
    helicopter noises in Paratrooper.
  - Fixed PC speaker emulation to allow higher PC speaker
    frequencies (10x the value of pcrate) to reduce
    hiss/noise/aliasing noise that occurs when games
    program ultrasonic frequencies into the counter to
    "silence" the speaker. "Titus the Fox Marrakech and
    Back" should no longer have audible hissing noises
    between beeps when the game is using the PC speaker.
  - Increased DOS device limit, to avoid E_Exit() crash
    if all LPT and COM devices are enabled along with
    the new CLIP$ device.
  - Minimum MCB free default changed to better reflect
    a typical MS-DOS setup with minimal to no drivers.
    This should result in a report of 600K-ish memory
    free, which is equivalent to Windows 95 without
    anything loaded except COMMAND.COM.
  - DIR command now supports /S (search all directories)
    as well as /A, /AS, /A-S, /AH, /A-H, /AR, /A-R, /AA,
    /A-A options for file attribute support; Note that
    DIR /A shows all files and directories whereas DIR
    alone (without /A) shows all except system/hidden
    ones as in a real DOS system (Wengier)
  - DIR command now shows the real free disk space on
    local drives. It is possible to limit this free space
    for certain programs with the -freesize option of
    MOUNT command. A new config option "freesizecap" is
    added to change the behavior of this option (Wengier)
  - DIR command fixed to show the volume label of the
    drive you are listing, instead of always the current
    drive (rderooy)
  - Various improvements to DEL and COPY commands, e.g.
    fixed the DEL /P option having no effect, and "DEL ."
    deleted all files in the current directory silently;
    the COPY command now asks for confirmation before
    overwriting files, and it now supports /Y and /-Y
    options to change this behavior, which can also be
    set from the COPYCMD environment variable. (Wengier)
  - Added or fixed help information and/or error messages
    for some commands. (Wengier)
  - Added support for DOS programs to communicate
    with the clipboard in Windows builds. If the
    "dos clipboard device enable" setting in
    dosbox-x.conf is set to "true" or "full", a DOS
    device (default name: CLIP$) will be added to
    allow bidirectional communications with the
    clipboard (e.g. "DIR >CLIP$" will write the
    output to the clipboard, and "TYPE CLIP$" will
    show the clipboard contents). Alternatively,
    you can set it to "read" or "write" to allow
    only read or write access for security reasons.
    The DOS device name can also be changed with
    the "dos clipboard device name" setting in
    dosbox-x.conf. (Wengier)
  - Added support for using the right mouse button
    to copy and paste from the Windows clipboard; the
    config option "clip_key_modifier" can be used to
    change the keyboard modifier such as none, alt, ctrl,
    shift, or disable this feature (default). (Wengier)
  - Updated the PasteClipboard feature in SDL1 build
    to support Unicode text translations; also fixed this
    feature not working in SDL2 build. The config option
    "clip_paste_speed" is added to speed up or slow down
    the pasting speed for different DOS programs (Wengier)
  - Support for DOSLIB2's w95sysrg/w95sysrs utils to
    get/set system registry location in DOS 7+. (Wengier)
  - Long filename support added, adapted from
    the vDosPlus project. It will be enabled with
    an initial DOS version of 7.0 or higher. (Wengier)
  - Corrected return value when using option to
    fake the installation of SHARE. (Allofich)
  - Added code to EMS emulation to print specific
    debug information when a PC-98 specific call is
    made to remap segment B000h to either system
    memory or video memory. I do not have enough
    test cases or a setup to test what really happens,
    so it will remain a debug message for now.
  - Added dosbox-x.conf option to allow emulation of a
    DOS environment that lacks ANSI.SYS. NOTE: The
    option has no effect in PC-98 mode.
  - INT 2Fh now responds to AX=1A00h which is an installation
    check to report whether ANSI.SYS is resident.
  - Added INT 21h debug logging for file I/O and general
    INT 21h usage [patch by ognjenmi]. Added enables for
    the logging which are off by default since the INT 21h
    and file I/O logging are fairly noisy under normal
    usage.