DOSBox-X release 0.82.4

NOTICE: This is the last official release to maintain both async and non-async Windows builds. Windows releases from this point on will contain the async code only.

0.82.4 (02/28/2018)

• Updated ramdisk formatting code to better match FAT12/FAT16
  specifications and limits (Shane32)
• Menu items related to Gravis Ultrasound, Glide emulation, Innova SID,
  and other IBM PC-specific options are now grayed out in PC-98 mode.
• Updated Windows menus to gray out CPU core and type options that
  are invalid. Selecting a prefetch CPU type while core dynamic is
  no longer possible, and selecting dynamic core while using a
  prefetch cpu type is no longer possible.
• CPU type submenu in Windows updated to reflect all types supported
  by DOSBox-X including 8086 and 286 cores.
• Fixed E_Exit() crash on Windows in PDCurses endwin() that only
  happens if you had never brought up the debugger console window.
• Minor oddities with OPNA stereo panning resolved.
• Sound Blaster, Adlib, and PC-98 FM emulation now reset state
  correctly when the reset signal is given to avoid stuck notes.
• Fixed BIOS logo in PC-98 mode to properly reset the graphics mode
  so that the logo is visible.
• Added Windows menu items to control PC-98 GDC speed, 4-partition enable,
  200-line "scanline" effect enable, and PIT timer clock control.
• Added "Restart DOS" command to the Windows menu, with code to
  allow it only if at the initial DOS shell.
• Added "multi-track WAV" command to the Windows menu, under Capture
• Added "reset system" command to the Windows menu
• "Restart" menu command updated to clarify that it restarts DOSBox-X entirely.
• OpenGL HQ output removed.
• Commands to force driver (DirectX or WINDIB) removed.
• Default disk I/O limit raised to more reasonable speeds.
• FM code borrowed from Neko Project II now compiles on Mac OS X
• IMGMOUNT now supports mounting a RAM drive (using -t ram) (Shane32)
• Direct3D fullscreen aspect ratio fixes, especially for
  monitors with a 5:4 aspect ratio (such as 1280x1024) (Shane32)
• "Show menu" in Windows builds system menu is now a toggle
  to show/hide the menu bar (Shane32)
• Fixed broken color palette with CGA composite and EGA
  machine emulation. Composite CGA and machine=ega displays
  properly again.
• According to documentation, IBM PC and PC-98 use different
  initial PC speaker frequencies. Update the code to match.
• 8254 I/O port alias at 3FD9h-3FDFh added, which is needed
  for several PC-98 games that program the PC speaker
  frequency through those ports instead of through 71h-77h
• New Intel 8255 emulation. PC-98 system 8255 emulation
  now uses this emulation, along with PC speaker emulation.
• Fixed XMS memory copy functions to enable the A20
  gate so extended memory copies work correctly whether
  or not the DOS application in question made the call
  with A20 enabled. This fixes crashes and memory
  corruption while installing Windows 3.1 using SETUP.EXE.
• "CLS" now sends the proper ANSI escapes to clear the
  console in PC-98 mode.
• BIOS logo in PC-98 fixed to clear graphics RAM and
  set graphics back to 8-color digital mode when booting
  to DOS. This should fix palette errors and color issues
  with older PC-98/PC-88 games that use the 8-color
  graphics modes.
• Added PC-98 INT 1Ch timer interval BIOS function,
  and timer countdown routine in IRQ 0.
• Windows builds now incorporate pdcurses and enable
  the debugger interface (bulletshot60)
• DOSBox-X now tracks the systemwide keyboard layout
  on Windows, and acts on user changes to the keyboard
  and language in the system.
• Removed hack code in SDL 1.x that sets DOSBox-X's
  keyboard layout to the US layout even if the host
  uses anything else.
• Fix CPU cycles count increment not to nag you to use
  core=dynamic if a) dynamic core is not available or
  b) you're already using dynamic core.
• Added dynamic core back, it seems to be very stable
  again.
• PC-98 FM board now allows changing the base I/O port
  and IRQ (interrupt) line used by the card.
• PC-98 mode now supports joystick emulation. Joystick
  input is mapped through the DOSBox mapper to the
  PC-98 FM board where DOS games expect to see it.
• Added dosbox.conf option to select which PC-98 FM
  board to emulate.
• Fixed PC-98 FM code to enable the ADPCM and Rhythm
  FM channels.
• Re-ported Neko Project II FM board emulation, this
  time keeping the code intact and keeping the separate
  board emulations intact for PC-98 mode.
• VGA palette errors with Crystal Dream II fixed.
• PC-98 FM synthesis fixed not to initialize itself
  again when rebooting, which fixes a problem with
  garbled FM synthesis after rebooting.
• Removed some now-unnecessary SDL Video quit/init
  calls from Windows builds.
• machine=pc98 now starts entire emulation in PC-98
  mode instead of booting up in IBM PC mode and
  switching to PC-98 mode.
• Initial "BIOS" startup screen now operates in
  PC-98 mode when machine=pc98.
• Prefetch core debug code now disabled at compile
  time. Seems to be stable so far.
• Prefetch core now emulates partial load of the
  prefetch buffer on miss, and completing the buffer
  fill on hit, to better emulate (probable) 80486
  behavior.
• 486_prefetch is now a valid cputype setting, despite
  the setting having existed for years in the source
  code. Prior to this fix, 486_prefetch was ignored.