DOSBox-X release 0.82.9 2018-09-01 14:00

0.82.9

• "Always on top" mode is now available for Mac OS X builds.
• PS/2 mouse emulation fixed not to send relative mouse motion
  unless mouse cursor is captured.
• Shell no longer provides MEM.COM if machine=pc98 or cputype=8086.
  MEM.COM is not compatible with either case.
• INT 10h emulation will now set the S3 LFB enable bit for VESA
  SVGA modes, unless machine=vesa_nolfb was specified.
• VGA emulation revised to report possible known problems with
  Windows 3.1 with regard to LFB base address or memalias setting.
• VGA emulation fixed to emit warning if memalias=24, for S3 LFB,
  if machine=svga_s3, to inform the user that the configuration is
  known to cause the Windows 3.x driver to crash.
• VGA emulation will no longer report S3 linear framebuffer address
  unless machine=svga_s3. The LFB address doesn't matter for anything
  other than SVGA S3 emulation.
• S3 emulation will now automatically disable PCI VGA emulation if
  constraints prevent DOSBox-X from setting a linear framebuffer
  address aligned to 32MB (as required for PCI emulation).
• VGA emulation fixed to pick a more appropriate linear framebuffer
  (S3) address if memalias is set to a value below 32.
• Added dosbox.conf option "pci vga" to control whether the VGA
  emulation appears as a PCI or ISA device.
• ROM BIOS now forces reported RAM down to make room for BIOS
  alias at top of memory instead of throwing an E_Exit error.
• Fixed Hercules emulation (and MDA) so that the Hercules palette
  is always enforced. This fixes a bug where switching to HGC
  graphics mode resulted in monochrome blue/black graphics instead
  of the intended white/green/amber color expected.
• Added MDA emulation (machine=mda). It functions like
  machine=hercules minus the graphics mode and Hercules-specific
  extensions to the base MDA card.
• DOSBox shell no longer accepts dosbox.conf settings as commands
  by default, unless enabled in dosbox.conf. Typing "cycles" will
  no longer show cycle count. The dosbox.conf setting allows the
  user to enable it again i.e. for compatibility with DOSBox SVN.
  This is to prevent dosbox.conf settings from polluting the
  available commands at the shell and conflicting with shell and
  executable names.
• EGA emulaton fixed to obey Color Plane Enable register in
  16-color planar modes.
• Fixed BIOS model byte to report PS/2 model 30 correctly when
  machine=mcga, to allow certain DOS games to detect MCGA that way.
• CGA mode/color select registers are readable on MCGA, fix 3D8-3D9h
  to reflect that.
• INT 10h fixed to properly allow/deny AH=10h, AH=11h, and AH=12h calls
  according to machine= type instead of mistakes that blocked too many
  calls.
• CGA composite mode should not be available when machine=mcga.
• Fixed INT 10h to report MCGA color display if machine=mcga.
• MCGA (IBM PS/2 Multi-Color Graphics Adapter) emulation added.
• bitop C++11 self-test disabled for Microsoft Visual Studio builds.
  Microsoft's compiler can't handle them for some reason.
• Added DOSLIB DSXMENU.EXE to the built-in executable list.
  DSXMENU.EXE allows DOS CONFIG.SYS style menus to be set up to
  run commands based on menu selection.
• PC-98 ANSI emulation fixed to use the number of rows on the screen,
  not cursor position, to range-clip ANSI cursor positioning.
• Added code to have DX-CAPTURE wait 3 seconds (or until ENTER/SPACE
  is pressed) after the program exits, before stopping capture.
• DOSBox-X menus now allow runtime selection of capture format
  (AVI+ZMBV or MPEG-TS H.264). Changing while capturing will stop/start
  capture correctly.
• Added switches to DX-CAPTURE to allow specifying audio, multitrack audio,
  and video as well.
• DX-CAPTURE shell command added. The command to run is specified
  after DX-CAPTURE and DX-CAPTURE will start video capture, run the
  program, then stop capture when the program exits.
• VGA/SVGA emulation fixed to enforce 256KB (64KB planar) wraparound
  when emulating stock VGA modes (not SVGA/VESA BIOS). Some
  demoscene productions rely on the 256KB wraparound when showing
  scrolling credits.
• Gravis Ultrasound emulation now uses I/O callout system, with
  I/O port handling to emulate ISA bus 10-bit decoding (but with
  consideration of GUS MAX 7xx registers) so that GUS I/O ports
  are visible every 1000h I/O ports. A demoscene production was
  found that relies on an alias of GUS ports at 5xxxh rather than
  using the I/O ports directly.
• Mouse emulation no longer sends motion to serial and PC-98 mouse
  emulation unless mouse cursor has been captured.
• Mouse emulation fixed to set sensitivity and mickey count even if
  int33=false on mouse emulation reset.
• Debugger fixed to paginate commands with a lot of output, including
  HELP, PIC, and various commands to dump interrupts and GDT/IDT tables.
• CPU core no longer triggers Double Fault if Divide Overflow
  occurs within Divide Overflow. This is needed for bizarre anti-debugger
  obfuscated code seen in a demoscene production, where the program
  wraps the demo in a mini-filesystem emulated by trapping INT 21h.
• cputype= dosbox.conf setting fixed to allow selecting between
  new 486 emulation (cputype=486) and old 486 emulation (cputype=486old).
  The "old" 486 core emulates older 486 CPUs that differ significantly
  from the newer 486 CPUs that inherited features from the Pentium.
• IRQ hack setting for GUS and Sound Blaster is now a list so that
  multiple hacks can be specified, but in a way that is backwards
  compatible with existing dosbox.conf files.
• IRQ hack option for Gravis Ultrasound added.
• INT 20h emulation fixed to work with demoscene productions that
  call INT 20h in a way that the interrupt frame wraps around the
  64KB limit of the stack.
• XMS emulation now has a dosbox.conf setting to control the number
  of XMS handles available.
• Added INT 33h option not to round mouse cursor coordinates to text
  cell boundaries in text mode. Some demoscene productions were found
  that detects mouse movement, but reads initial position from text mode
  before switching to graphics.
• Removed IRQ0 error measurement hack, to match DOSBox SVN. This fixes
  timing problems with some demoscene productions. The error measurement
  hack was apparently added for Microsoft Flight simulator, but has not
  been needed since and has been causing timing issues since.
• Fixed INT 10h VGA save state function to program the Attribute Controller
  properly so that the screen is not left blank after the call.
• 8042 keyboard emulation now initializes port 60h to 0xAA on hardware
  reset and initialization. Some DOS games and demoscene productions
  need something with bit 7 set in the register at startup in order not
  to act as if a key was immediately pressed.
• Add printer emulation from Daum's branch of DOSBox, add FreeType 2.9.1
  to go with it (Alex/AT)
• Add keyboard type setting, for use in future development.
• PCjr emulation fixed to emulate PC/XT style NMI mask at port A0h
  rather than emulate the secondary PIC.
• Code of Conduct revised to make it clear that forks/derivatives CAN
  have their own Code of Conduct but that it only applies to that fork
  or derivative version. No forking DOSBox-X, changing the code of
  conduct, and enforcing it on anyone outside your fork.
• CPU normal core fixed to clear ZF flag after MUL when cputype=8086,
  which fixes problems with MSD.EXE mis-detecting the CPU as a NEC V20.
• Fixed PCjr emulation not to allow UMB (upper memory blocks) since
  that seems to cause stability issues with emulation. Also, PCjr
  does not have UMB as far as I know.
• Fixed PCjr not to re-read port 60h from IRQ1 handler.
• Fixed PCjr not to emulate INT 15h keyboard hook.
• PCjr keyboard emulation fixed to trigger NMI and reflect to IRQ1
  the way it actually works on IBM PCjr systems, which also fixes
  keyboard control issues with the PCjr version of "Pitfall".
• configure.ac now provides an option for compiler optimization (Yksoft1)
• Code of Conduct, initial version, added to source tree
• PC-98 palette save/load state
• CPU, memory, VGA palette and attribute controller save/load state
• DOS SHELL now implements INT 0x2E to allow DOS programs to invoke
  shell commands through COMMAND.COM (borrowed from DOSBox SVN).
• Added dosbox.conf option to control the physical memory address of the
  S3 SVGA linear framebuffer.
• Save/load state system added, currently very minimal and experimental.
• Appveyor XML added to source tree (Allofich)
• Fixed most SDL2 refresh problems.
• Sound Blaster Pro mixer volume fixed to return reserved bits SET rather
  than CLEAR. Some demoscene productions detect Sound Blaster Pro by whether
  these bits remain set when written. This fix allows them to detect Sound
  Blaster Pro as Sound Blaster Pro.
• VGA emulation fixed not to add 2 scanlines twice, which fixes VGA vertical
  timing and scanline count and fixes the scroller in "Inconexia".
• Gravis Ultrasound emulation now prints a warning if the game/demo attempts
  a DMA transfer while leaving the DMA channel masked.
• Fixed Gravis Ultrasound emulation to mask DRAM peek/poke I/O to the 1MB
  offered by the card, which fixes GUS problems with a demoscene production
  that has random values in DRAM address bits 23-20.
• Added dosbox.conf option that, if set, lets Gravis Ultrasound emulation
  start a DMA transfer if the game/demo is polling the DMA control register
  when DMA is unmasked and DMA terminal count has not occured, which helps
  some dem...

DOSBox-X beta 0.82.8 2018-07-15 16:00

• VGA DAC emulation cleanup, and accuracy fixes. Attribute controller, pel mask, and palette now operate in the way they actually work on real hardware.
• VGA DAC emulation alternate behavior for Tseng ET4000 emulation, based on what actual ET4000 hardware does with the Attribute Controller, Pel mask, color select, and palette. Note that this behavior is required for COPPER.EXE to do it's line-fading technique properly.
• machine=svga_et4000 emulation now also supports the hretrace "wobble" technique in COPPER.EXE
• Added option to map SVGA non-linear framebuffer modes with a 128KB window starting from the 64KB bank-switching window, to help with a few demoscene productions that seem to have problems rendering past the 64KB bank without properly bank switching.
• Gravis Ultrasound emulation now has an option to start emulation with the GUS wavetable, IRQ already started and running (as if ULTRINIT) which is needed for some demoscene productions.
• Added "pic unmask irq" for Gravis Ultrasound.
• Added hack for Gravis Ultrasound (disabled by default) where polling the DMA control register can check and re-trigger GUS DMA. For use with demoscene productions that have broken GUS support when uploading samples to the GUS.
• Fixed Gravis Ultrasound emulation to mask the DRAM address (wraparound) to 1MB when the DOS game/demo peeks/pokes samples into RAM without DMA. This fixes "Acme Mental Masturbation" demo which seems to upload samples directly this way where bits 23-20 of the DRAM address are garbage or meaningless.
• Fix VGA vertical timing bug where vtotal += 2 was applied twice.
• Fixed Sound Blaster Pro mixer emulation to leave undefined bits set, not cleared. This fixes some demoscene productions that rely on set reserved bits to detect Sound Blaster Pro.
• Fixed refresh and screen update problems with SDL2 builds.
• Refactoring and cleanup of SDL output modes, separation into separate files (Alexat)
• New load/save state framework. Currently (at this build) loads/saves system RAM, video RAM, and CPU state. THIS FRAMEWORK IS VERY EXPERIMENTAL AND IS NOT GUARANTEED TO WORK WITH MORE THAN A HANDFUL OF GAMES. Mapper shortcuts are hostkey+F1 to save, hostkey+F2 to load. Hostkey is F12, except on Windows, where hostkey is F11.

DOSBox-X beta 0.82.8 2018-07-05 09:00

This is a beta release.

This has fixes for mouse integration, and consolidation of aspect ratio scaling along with other minor fixes.

DOSBox-X release 0.82.8 2018-07-01 10:00

0.82.8

• New xBRZ scaler (with bilinear mode) (Alexat)
• Fixed aspect ratio correction to use the ratio given by VGA emulation
  instead of assuming 4:3
• output=surface and xBRZ now permit filling the window just like
  output=opengl and output=direct3d
• Added critical section around Windows SDL 1.x resize code to solve
  the remaining 0.5% probability that resizing the window causes move
  and resize to stop working in Windows 10.
• INT 10h AH=10h now ignores AL=3 in PCjr mode.
• Fixed keyboard handler bug in PCjr mode that caused some CPU
  register corruption and general crashiness in games.
• Improved shell: (Aybe, Joncampbell123)
  • Ctrl+Left and Ctrl+Right permits word-navigation.
  • Added emulation of 'Ins' key behavior.
• Num Lock, Caps Lock, Scroll Lock are now synchronized at startup
  and when DOSBox-X window gains focus again (Windows). (Aybe)
• Added visual feedback to Hat/D-pad buttons in mapper. (Aybe)
• Added documentation for 'dir' command sorting switches. (Aybe)
• Menu 'Show console' is now checked with '-console' (SDL1). (Aybe)
• Improved joystick support (see README.joystick): (Aybe)
  • Added deadzone and response for joystick axes.
  • Axes can be remapped for devices with questionable layout.
  • User-settable deadzones for joystick bindings in mapper,
    mappings like WSAD keys to axes is less frustrating.
• Improved mouse integration (Aybe):
  • Now by default DOSBox-X does not emulate mouse movement when the mouse
    is not locked. This gives a consistent experience when compared to host OS.
    For the old behavior, use [sdl] mouse_emulation=always.
  • Added visual or auditive feedback about auto-lock state (Windows).
    This feature can be switched off, use [sdl] autolock_feedback=none.
• Added CAPMOUSE program for capturing/releasing mouse from command line. (Aybe)

DOSBox-X release 0.82.7 2018-06-01 13:05

0.82.7

• Mac OS X builds now honor showmenu=false by leaving the
  stock SDL menu in place at startup.
• Default minimum MCB free/base is now 0x100, to sidestep
  unknown unstable DOS application behavior when DOS
  applications are loaded at around segment 0x800.
  This also puts DOSBox-X at parity with the base memory
  behavior of DOSBox SVN.
• Add dosbox.conf option to set Sound BIOS enable
  bit in non-volatile RAM (PC-98) that tells older
  PC-98 games the FM card is present (Yksoft)
• BOOT updated to boot D88 except for 2D format which
  is generally used by PC-88 disk images.
• Added D88 disk image support
• CMake files added (Aybe)
• PIC timing updated to use "double" float type for
  more precision, but as a typedef for future support
  as a compile time option.
• Removed geometry checks from INT 1Bh FDC functions,
  to allow non-uniform disks to work.
• MinGW builds now allowed to use Direct3D.
• Direct3D output fixed to use the same texture
  coordinate, window fitting, and positioning
  logic as OpenGL.
• Update zlib and libpng libraries in-tree.
• Fixed VFD disk image support to correctly signal
  failure to detect geometry, to avoid divide by
  zero crash with FAT driver.
• showmenu= now taken into consideration whether to
  show the menu bar at startup
• Fixed get_item() E_Exit crash if menus asked to
  show from dosbox.conf
• SDL drawn menus fixed to integrate with Direct3D
  output on Windows.
• PC-98 mode can now boot floppy disk images where the
  boot sector is 128 or 256 bytes/sector despite
  track 1 and higher having 1024 bytes/sector.
• General codebase cleanup, compiler warning cleanup.
• Enable XInput support on Windows (Aybe)
• Fixed SDL drawn menus to use std::vector properly,
  not to hold onto iterators while resizing the vector
  and popping things off the top.
• PC-98 INT 1Bh "read id" floppy disk call fixed to
  cycle through sector numbers. Some bootable PC-98
  games use "MEGDOS" which polls this BIOS call before
  attempting to read the disk. If the sector numbers
  never cycle, "MEGDOS" will not attempt to read the
  disk.
• Fixed bug that prevented some menu options (such as
  "aspect ratio") from working if still in the BIOS or
  booted into a guest OS.
• PC-98 mode fixed to ignore "mainline compatible mapping".
  That mapping mode refers to DOSBox SVN which never
  supported PC-98 mode anyway.
• Fix PC-98 INT 1Bh "test read" call, which then allows
  "cherry bomb" to run.
• Remove geometry checks in PC-98 INT 1Bh BIOS call, so
  that FDD images with odd sector sizes can work.
• ROM BIOS now automatically occupies E8000-FFFFF instead
  of F0000-FFFFF when in PC-98 mode.
• Most 128 byte/sector FDD images appear to jump to
  E800:0002. I'm guessing that's ROM BASIC, so add a
  callback at that location to catch these boot disks
  and show a message instead of allowing the boot
  sector to jump to nothing and crash.
• PC-98 BOOT fixed to check for and support booting from
  FDD images where track 0 contains 128 byte/sector
  boot sectors.
• PC-98 INT 1Bh support fixed to support reading/writing
  sector sizes other than the one sector size reported
  by the image. It is now possible to read the other
  sector sizes from an FDD/VFD image.
• Fixed somewhat serious bug that, when compiled against
  Microsoft C++, causes the AVI writer to use the 32-bit
  lseek() function instead of the 64-bit lseek64() function.
  Prior to this fix, AVI captures would begin to corrupt
  themselves after growing past 2GB in size.
• Cleanup code, fix compiler warnings, typecast problems,
  C/C++ conformance problems as reported by GCC 4.8,
  GCC 7.3.0 (MinGW), Visual Studio 2017, and Clang/LLVM
  on Mac OS X.
• FM Towns machine type stub, for anyone interested in
  forking DOSBox-X to implement FM Towns emulation.
• Code cleanup, refactor, according to compiler warnings.
• SDL drawn menus fixed to copy Direct3D backbuffer to
  the SDL surface when popup occurs. This allows the
  menus to overlap the Direct3D display correctly.
• Fixed Direct3D output so that when composing the next
  frame in the backbuffer, it also copies the SDL drawn
  menu from the SDL surface in order to keep it on
  screen.
• Direct3D output updated to follow SDL clip rectangle
  struct, in the same exact manner as the OpenGL output.
  This also permits the Direct3D output to correctly size
  itself and leave space at the top for the SDL drawn
  menus.
• Fixed dynamic core entry point to push/pop EBP because
  debug builds need the compiler to track the stack frame.
• Updated in-tree zlib and libpng libraries to the latest
  provided by both projects.
• Fixed VFD (FDD) disk image support to signal to FAT driver
  properly an error if it could not determine a geometry.
• Fixed code breakage with SDL2 that prevented compilation
  with Munt (MT32) emulation enabled. SDL2 builds now allow
  MT32 emulation.
• Mac OS X builds now compile against the in-tree zlib and
  libpng libraries for consistency.
• MinGW builds now compile against the MinGW provided zlib
  and the in-tree libpng library for consistency.
• Enabled MinGW builds to use Direct3D and Direct3D shaders.
• Added code to auto-detect the VirtualBox display driver
  in Windows build, because OpenGL output doesn't work
  in Windows XP under VirtualBox. The change will switch
  the default output to "surface" if VirtualBox is detected,
  else will retain the "opengl" default. This change applies
  only to MinGW builds and not HX DOS or main VS2017 builds.
• Added PC-98 INT DCh emulation for function call that
  writes a char to the screen, allowing Eve Burst Error
  to clear the function row
• Added command line option to allow skipping the 1-second
  wait in the BIOS startup screen.
• SDL2 builds now support use of the SDL drawn menu with
  a touchscreen device.
• Fixed up SDL2 support code to compile correctly on
  Mac OS X.
• Fixed up SDL2 compilation to automatically use the
  SDL2 library on the system, or if that is not available,
  use the SDL2 library in-tree. There are no plans to make
  modifications to the in-tree SDL2 code.
• Added code to read and discard OpenGL error code before
  creating font texture, to avoid false failure handling.
  This fixes font rendering on Windows MinGW builds when
  output=opengl.
• OpenGL SDL drawn menus fixed to ensure the menu contents
  have been redrawn at least twice. One for each OpenGL
  buffer because DOSBox-X uses the double-buffered mode.
• SDL drawn menus implemented for output=opengl. The menu
  bar in Linux builds is now available in OpenGL mode.
• SDL drawn menus fixed to redraw only when state changes,
  and to clean up menu drawing code.
• US keyboards can now enter the "Ro" key in PC-98 mode.
  Default binding is set up to map the Windows Menu key
  as Ro in PC-98 mode.
• VGA option change code fixed to trigger scaler redraw
  correctly. Changing video modes or changing between
  8/9-pixel VGA text no longer leaves artifacts on the
  screen.
• Added code to force redrawing additional frames when
  output=opengl, in order to correct a bug with Linux/X11
  and MesaGL where the first OpenGL buffer swap after
  SDL_SetVideoMode() is misplaced when the window size
  changes.
• Renderer SSE line comparison fixed to use correct sizeof()
  of the integer type during compare.
• Renderer fixed not to use SSE and non-SSE line comparision
  at the same time, if SSE was enabled at compile time.
• Fixed in-tree SDL 1.x library to allow DOSBox-X to disable
  auto-refresh of the window in Linux/X11 after SDL_SetVideoMode
  to prevent visible flickering when resizing the window.
• Conditional support for Direct3D (9) output enabled for
  MinGW builds, if the MinGW headers are available (yksoft1).
  Option is disabled by default.
• Configuration GUI dialog box widened to accomodate buttons
  that were previously cut off on the right.
• Replace E_Exit() with LOG_MSG() for key codes from the mapper
  that a keyboard scan code generator does not recognize. This
  fixes E_Exit() crashes if typing certain keys on a Japanese
  keyboard with no equivalent in IBM PC/AT mode.
• Added code to double the size of the menu and menu items if
  the window is 1280x800 or larger, for users with high
  definition laptop displays and screens.
• Enforce minimum window size of 640x400 if the menu bar is
  visible and DOSBox-X is drawing them, to make sure the menus
  are accessible on screen.
• Removed auto-scalar-size code when output=surface that was
  causing problems when resizing the window.
• Do not show "screenshot" menu item if screenshot support not
  available at compile time.
• Remove "always on top" for anything but Windows at this time.
• Disable "Show debugger" option on Linux and Mac OS X if no
  console attached to STDIN/STDOUT/STDERR.
• Disable "Show console" option on Linux and Mac OS X since
  the console is not under our control.
• Windows "Always on top" fixed to remember selection and
  enforce it between SDL_SetVideoMode and fullscreen entry/exit.
• Windows builds fixed NOT to change window Z-order on the
  screen when updating the window on SDL_SetVideoMode.
• HX DOS builds fixed to keep window maximized at all times
  to fill the otherwise unused space on the screen since
  HXGUI only supports one window.
• Menu framework support for any other platform (including
  Linux) added. The menus are drawn by DOSBox-X itself
  using the 8x16 VGA font. This also gi...

DOSBox-X BETA 2018-05-18 17:00

• Added PC-98 INT DCh emulation for function call that
  writes a char to the screen, allowing Eve Burst Error
  to clear the function row
• Added command line option to allow skipping the 1-second
  wait in the BIOS startup screen.
• SDL2 builds now support use of the SDL drawn menu with
  a touchscreen device.
• Fixed up SDL2 support code to compile correctly on
  Mac OS X.
• Fixed up SDL2 compilation to automatically use the
  SDL2 library on the system, or if that is not available,
  use the SDL2 library in-tree. There are no plans to make
  modifications to the in-tree SDL2 code.
• Added code to read and discard OpenGL error code before
  creating font texture, to avoid false failure handling.
  This fixes font rendering on Windows MinGW builds when
  output=opengl.
• OpenGL SDL drawn menus fixed to ensure the menu contents
  have been redrawn at least twice. One for each OpenGL
  buffer because DOSBox-X uses the double-buffered mode.
• SDL drawn menus implemented for output=opengl. The menu
  bar in Linux builds is now available in OpenGL mode.
• SDL drawn menus fixed to redraw only when state changes,
  and to clean up menu drawing code.
• US keyboards can now enter the "Ro" key in PC-98 mode.
  Default binding is set up to map the Windows Menu key
  as Ro in PC-98 mode.
• VGA option change code fixed to trigger scaler redraw
  correctly. Changing video modes or changing between
  8/9-pixel VGA text no longer leaves artifacts on the
  screen.
• Added code to force redrawing additional frames when
  output=opengl, in order to correct a bug with Linux/X11
  and MesaGL where the first OpenGL buffer swap after
  SDL_SetVideoMode() is misplaced when the window size
  changes.
• Renderer SSE line comparison fixed to use correct sizeof()
  of the integer type during compare.
• Renderer fixed not to use SSE and non-SSE line comparision
  at the same time, if SSE was enabled at compile time.
• Fixed in-tree SDL 1.x library to allow DOSBox-X to disable
  auto-refresh of the window in Linux/X11 after SDL_SetVideoMode
  to prevent visible flickering when resizing the window.
• Conditional support for Direct3D (9) output enabled for
  MinGW builds, if the MinGW headers are available (yksoft1).
  Option is disabled by default.
• Configuration GUI dialog box widened to accomodate buttons
  that were previously cut off on the right.
• Replace E_Exit() with LOG_MSG() for key codes from the mapper
  that a keyboard scan code generator does not recognize. This
  fixes E_Exit() crashes if typing certain keys on a Japanese
  keyboard with no equivalent in IBM PC/AT mode.
• Added code to double the size of the menu and menu items if
  the window is 1280x800 or larger, for users with high
  definition laptop displays and screens.
• Enforce minimum window size of 640x400 if the menu bar is
  visible and DOSBox-X is drawing them, to make sure the menus
  are accessible on screen.
• Removed auto-scalar-size code when output=surface that was
  causing problems when resizing the window.
• Do not show "screenshot" menu item if screenshot support not
  available at compile time.
• Remove "always on top" for anything but Windows at this time.
• Disable "Show debugger" option on Linux and Mac OS X if no
  console attached to STDIN/STDOUT/STDERR.
• Disable "Show console" option on Linux and Mac OS X since
  the console is not under our control.
• Windows "Always on top" fixed to remember selection and
  enforce it between SDL_SetVideoMode and fullscreen entry/exit.
• Windows builds fixed NOT to change window Z-order on the
  screen when updating the window on SDL_SetVideoMode.
• HX DOS builds fixed to keep window maximized at all times
  to fill the otherwise unused space on the screen since
  HXGUI only supports one window.
• Menu framework support for any other platform (including
  Linux) added. The menus are drawn by DOSBox-X itself
  using the 8x16 VGA font. This also gives SDL 2.x builds
  a working menu. These menus are used if no other platform
  specific menus are available. These menus are NOT AVAILABLE
  at this time if output=opengl.
• Cycle count edit dialog box fixed to immediately place
  keyboard focus in the text field, and to process
  ENTER and ESCAPE keyboard input as OK and CANCEL
  button input. You can type a new cycles count without
  having to click on the text field first.
• Menu framework and mapper fixed so that menus always
  reflect the mapper binding in the menu.
• Windows SDL 1.x fixed async hack to properly destroy
  and shut down the parent window again.
• Fixed output=opengl crash on Mac OS X.
• Menu framework support for Mac OS X NSMenu objects added.
  This gives DOSBox-X the same useful menu on Mac OS X
  instead of the useless default menu SDL 1.x offers.
• Menu framework support for Windows win32 menu resources
  added. The Windows menu is now generated at runtime,
  the static IDR_MENU resource is no longer used.
• New platform independent menu framework added. Menus
  that were once Windows-only are now available on
  any other platform including Linux and Mac OS X.
• In-tree SDL 1.x library fixed to #define a special
  variable that the code now requires to compile
  SDL 1.x builds. The option to use your host SDL 2.x
  library is left open.
• C++11 is now mandatory to compile DOSBox-X

DOSBox-X menu rewrite WIP BETA 2018-05-13 13:16

0.82.7 (next)

• Added code to force redrawing additional frames when
  output=opengl, in order to correct a bug with Linux/X11
  and MesaGL where the first OpenGL buffer swap after
  SDL_SetVideoMode() is misplaced when the window size
  changes.
• Renderer SSE line comparison fixed to use correct sizeof()
  of the integer type during compare.
• Renderer fixed not to use SSE and non-SSE line comparision
  at the same time, if SSE was enabled at compile time.
• Fixed in-tree SDL 1.x library to allow DOSBox-X to disable
  auto-refresh of the window in Linux/X11 after SDL_SetVideoMode
  to prevent visible flickering when resizing the window.
• Conditional support for Direct3D (9) output enabled for
  MinGW builds, if the MinGW headers are available (yksoft1).
  Option is disabled by default.
• Configuration GUI dialog box widened to accomodate buttons
  that were previously cut off on the right.
• Replace E_Exit() with LOG_MSG() for key codes from the mapper
  that a keyboard scan code generator does not recognize. This
  fixes E_Exit() crashes if typing certain keys on a Japanese
  keyboard with no equivalent in IBM PC/AT mode.
• Added code to double the size of the menu and menu items if
  the window is 1280x800 or larger, for users with high
  definition laptop displays and screens.
• Enforce minimum window size of 640x400 if the menu bar is
  visible and DOSBox-X is drawing them, to make sure the menus
  are accessible on screen.
• Removed auto-scalar-size code when output=surface that was
  causing problems when resizing the window.
• Do not show "screenshot" menu item if screenshot support not
  available at compile time.
• Remove "always on top" for anything but Windows at this time.
• Disable "Show debugger" option on Linux and Mac OS X if no
  console attached to STDIN/STDOUT/STDERR.
• Disable "Show console" option on Linux and Mac OS X since
  the console is not under our control.
• Windows "Always on top" fixed to remember selection and
  enforce it between SDL_SetVideoMode and fullscreen entry/exit.
• Windows builds fixed NOT to change window Z-order on the
  screen when updating the window on SDL_SetVideoMode.
• HX DOS builds fixed to keep window maximized at all times
  to fill the otherwise unused space on the screen since
  HXGUI only supports one window.
• Menu framework support for any other platform (including
  Linux) added. The menus are drawn by DOSBox-X itself
  using the 8x16 VGA font. This also gives SDL 2.x builds
  a working menu. These menus are used if no other platform
  specific menus are available. These menus are NOT AVAILABLE
  at this time if output=opengl.
• Cycle count edit dialog box fixed to immediately place
  keyboard focus in the text field, and to process
  ENTER and ESCAPE keyboard input as OK and CANCEL
  button input. You can type a new cycles count without
  having to click on the text field first.
• Menu framework and mapper fixed so that menus always
  reflect the mapper binding in the menu.
• Windows SDL 1.x fixed async hack to properly destroy
  and shut down the parent window again.
• Fixed output=opengl crash on Mac OS X.
• Menu framework support for Mac OS X NSMenu objects added.
  This gives DOSBox-X the same useful menu on Mac OS X
  instead of the useless default menu SDL 1.x offers.
• Menu framework support for Windows win32 menu resources
  added. The Windows menu is now generated at runtime,
  the static IDR_MENU resource is no longer used.
• New platform independent menu framework added. Menus
  that were once Windows-only are now available on
  any other platform including Linux and Mac OS X.
• In-tree SDL 1.x library fixed to #define a special
  variable that the code now requires to compile
  SDL 1.x builds. The option to use your host SDL 2.x
  library is left open.
• C++11 is now mandatory to compile DOSBox-X

DOSBox-X menu rewrite WIP BETA 2018-05-06 17:54

This is a WIP release. This contains a lot of new code concerning the menu layout.

The menu handling system is being changed from one that loads a static Windows menu resource (IDR_MENU) to one that constructs a menu in a platform-independent manner.

The code is brand new and may have some bugs.

The menu framework concept:

• Components create a menu item by name, as an individual component
• The mapper automatically creates a menu item for each mapper shortcut registered at startup
• Lists of popup menus is defined by the menu item name
• Each menu list can refer to popup menus by name to enable levels of popups
• The final layout is defined in menu.cpp by name
• Components can change text, enable, checked, and shortcut text at any time, which is then reflected in the menu
• Windows builds map this to the Windows menu system
• Systems where menu support is not implemented, simply do not show a menu, but the menu is in memory anyway
• Menu items are then connected to a callback function, a mapper shortcut, or both

Look in menu.cpp for the char*[] string arrays that define menu layout by name. It's fairly straightforward.

Another additional feature, connected to the mapper, is that the mapper system automatically updates the menu item for a mapper shortcut when the key binding changes.

This eliminates the problem with DOSBox and DOSBox-X where the shortcut shown in the menu is only correct if the mapper shortcut is left at default.

In the new code, changing the key binding for a mapper shortcut should automatically update the menu.

A quick way to test this:

• Bring up the mapper
• Pick a menu item with a shortcut
• Locate the same shortcut in the mapper UI
• Click on the shortcut, to edit the binding
• Note the shortcut shown in the menu
• Change the binding modifiers
• Note the shortcut shown in the menu now, it should reflect your changes
• Delete the binding
• Note the shortcut shown in the menu, there should no longer be any shortcut
• Add a binding
• Note the shortcut shown in the menu, it should show your new binding.

Since menu item order is now defined in menu.cpp, rearranging the menu should be simple now and it should be possible to submit simple patches to do so.

The code only works with Windows at this time. The next major development step for this code is to try and produce identical menus under Mac OS X.

Mac OS X builds would benefit from having proper menus instead of the minimal and useless default provided by SDL.

Have fun. Please use the comments section of the commit this is assigned to for comments.

DOSBox-X release 0.82.6 2018-05-03 09:55

0.82.6

• Resizing the window in SDL 1.x Windows builds
  fixed to work correctly in the latest build
  (1803) of Windows 10. Prior to this fix, resizing
  the window on that build would quickly hit a deadlock
  that prevented the user from moving or resizing the
  window again after that point.
• PC-98 dosbox.conf option added to select between
  accurate key/shift mapping, vs an alternate mapping
  appropriate for US keyboards (Yksoft1)
• SDL 1.x for Linux/X11 modified to differentiate
  Ro and Yen keys despite X11 xkbmap apparently
  mapping both to the backslash. The keymap is
  queried to detect the scancodes at startup
  in order to return the correct SDLK constant.
• SDL 1.x and DOSBox-X mapper code updated to
  correctly map Ro, Yen, @ ^ ; : keys on a JP
  keyboard in Windows and Linux.
• PC-98 keyboard BIOS handling updated to generate
  ASCII codes according to PC-98 layout, instead
  of by US keyboard layout.
• Mapper updated to support @ (at sign) key,
  ^ (caret) key, and a few other keys that
  exist on JP keyboards.
• "Hold" modifier for mapper bindings fixed.
  It is now possible to tap the key again to
  release the hold.
• VHD differencing disk support added (Shane32)
• INT 18h AH=0Ah updated to support 20-line
  text mode. Some games use the 20-line text
  mode to space the text out vertically.
  Such games will display correctly now.
• INT 18h now maintains text layer state
  in BIOS data area byte 0x53C, just as
  the actual BIOS does.
• Added PC-98 INT 18h function AH=0Ah and
  AH=0Bh to support BIOS calls that enable
  "Simple Graphics" mode. This fixes
  problems with other games having vertical
  lines over the graphics, even though
  these games do not appear to use the
  simple graphics at all. (yksoft1)
• Added support for PC-98 "Simple Graphics"
  mode of text layer attribute bit 4. When
  enabled, the attribute bit 4 changes
  meaning from vertical line to a bit
  indicating that the 8-bit character is
  a low resolution 2x4 bitmap to be
  displayed in the text layer. This fixes
  score and status display in Carat.
• PC-98 INT 18h now implements AH=31h to
  report CRTC, text and graphics state and
  24khz/31khz video mode selection. This
  fix allows some games including Touhou
  Project to pace it's gameplay correctly
  in either video mode.
• MinGW HX DOS builds default to host key
  F12 again
• PC-98 mode now offers selection between
  24khz and 31khz video modes (yksoft1)
• KEYB.COM fixed to load only the fonts the
  ROM BIOS has allocated. This fixes a guest
  system crash if using KEYB.COM with
  machine=ega
• Moved host key to F11 for Windows. F12 is
  already taken by some internal debugging
  voodoo within Windows itself.
• DOSBox-X codebase now strongly encourages
  compilation with C++11, will become
  required soon.
• BOOT command fixed to make it possible to
  IMGMOUNT multiple floppies to drive 1, and
  boot from another disk in drive 0. This
  should enable the use of DOSBox-X with
  PC-98 games that expect to boot from drive
  A and the user to rotate through floppies
  in drive B.
• IMGMOUNT fixed to support mounting with no
  filesystems and multiple disk images, and
  using the "swap floppy" command to rotate
  through them.
• Added options to BOOT command that allows
  specifying multiple disk images and an option
  that says to swap disk images only through
  one drive.
• VHD dynamic support added (shane32)
• INT 10 AH=9 background color fixed in 256-color
  VGA modes.
• Intro text updated to reflect new default
  key bindings.
• Mapper shortcuts not in common use now exist
  without any default binding, and most existing
  default bindings are now associated with the
  "host" key.
• Added 4th modifier "host" key to the mapper.
  This "host" key is F12 by default. The intent
  is to eventually move most mapper shortcuts
  to some combination of F12 and another key,
  rather than many shortcuts scattered over the
  keyboard. Existing dosbox mapper files should
  continue to work.
• Renderer and 32bpp VGA display code fixed to
  reorder RGBA order for correct display on Intel
  Mac OS X systems. Mac OS X, on Intel systems,
  uses a strange BGRA 32bpp format that requires
  some adjustment on our part to display correctly.
• Added more 24bpp INT 10h VESA BIOS modes.
• Removed per-sector debug messages from VFD/FDD
  image support code.

DOSBox-X release 0.82.5 2018-04-18 23:51

0.82.5 (04/18/2018)

• Expanded memory manager memory copy fixed to
  enable A20 gate temporarily so that the copy
  works correctly.
• PC-98 FM board emulation now defaults to IRQ 12
  instead of IRQ 3. A lot of PC-98 games seem to
  have a strong preference for that IRQ with regard
  to FM music.
• PC-98 reset I/O port (F0h) fixed to emulate CPU
  reset according to the SHUT0 and SHUT1 state set
  by the guest. Normally writing port F0h is a
  signal to reset but SHUT0 and SHUT1 can be set to
  indicate alternate behavior. This fixes VEMM486.EXE
  (an expanded memory manager) and allows it to run,
  since this manager appears to reset by port F0h
  then resume execution normally. Prior to this fix,
  booting a MS-DOS disk image that loads VEMM486.EXE
  at startup yielded nothing but an infinite reboot
  loop.
• XMS and EMS emulation fixed not to leave A20 gate
  enabled unless EMS emulation is set to EMM386 and
  dosbox.conf is set to run the system in virtual
  8086 mode. There are plenty of DOS games that
  malfunction if loaded too low in memory with the
  A20 gate enabled.
• PC-98 mouse emulation, at the 8255 level, now uses
  new C++ abstraction that seems to work fairly well
  even with the common PC-98 MOUSE.COM driver.
• "BOOT" command in PC-98 mode updated to no longer
  require the --force switch. Booting MS-DOS from a
  hard disk or floppy disk image in PC-98 mode is
  generally functional now.
• Added PC-98 SCSI/SASI hard disk emulation, and fixed
  BOOT to enable booting PC-98 MS-DOS from a hard drive
  (HDI image)
• FAT driver fixed to read/write logical sectors vs
  actual drive sectors and removed geometry remapping
  hack.
• FAT driver fixed to avoid memory corruption that
  may occur if reading a partition table from a drive
  that has more than 512 bytes/sector.
• .BAT file parsing fixed to handle BAT files not
  in the current directory (yksoft1)
• Fixed floppy controller emulation bug that failed
  to advance sectors during multi-sector read/write.
• Fixed floppy emulation bug that prevented seeking.
  The "head" would get stuck at track 0 and never move.
• Dynamic core allows running with paging enabled again,
  IF dosbox.conf says to allow it (yksoft1)
• DOS file I/O functions AH=3Fh and AH=40h updated to
  reflect undocumented MS-DOS behavior that silently
  truncates read/written byte count if the offset
  and byte count reach beyond the end of a 64KB segment.
  This fixes some demoscene productions that read 64KB-1
  bytes but apparently rely on this behavior to avoid
  display errors.
• FluidSynth fixes and API updates. DOSBox-X no longer
  uses a private API within FluidSynth. (heftig)
• Added dosbox.conf option to control the size of the
  DOS "Swappable Data Area" which is said to help with
  shelling and task swapping in WordPerfect 5.x and 6.x
• Added "minimum mcb free", and set minimum mcb segment to
  value same or similar to DOSBox SVN. The "free" option
  directs DOSBox-X to allocate memory before that segment
  value to fill memory.
• Fixed COMMAND.COM PSP segment to correctly identify it's
  resident size in memory.
• COMMAND.COM in the DOSBox shell now allocates itself
  normally instead of from a special segment so that it
  appears normally in the MCB allocation chain.
• BIOS now clears it's stack before booting the DOS shell.
• Fix Pause (CTRL+Pause or ALT+Pause) to release all keys
  in the mapper so that CTRL, ALT, or Shift are not left
  "stuck" when emulation resumes.
• Initial host keyboard recognition, and base framework
  for general keyboard language/layout handling. Keyboard
  layout recognition added for Windows and Linux/X11.
• Fixed 350-line INT 10h VESA modes not to apply EGA mode
  adjustments, which fixes display distortion.
• INT 10h VESA modes 720x480 and 848x480 fixed.
• Fixed INT 10h VESA emulation to round up bytes/scanline
  so that 4bpp planar modes display properly.
• Fixed INT 10h VESA mode 1400x1050 16-color (4bpp planar)
  mode to resolve overlapping mode number.
• Pulled in VGA vtotal + 2 fix from DOSBox SVN
• Pulled in EGA display mode fixes from DOSBox SVN to fix
  EGA graphics emulation.
• Fixed INT 10h AH=1Ch (save/restore VGA state) to handle
  VGA attribute controller properly so that the display is
  not left blank.
• PC-98 GDC emulation fixed to handle START DISPLAY properly
  by un-blanking the display (fixes "Ellena")
• Fixed possible format string vulnerabilities (gnustomp)
• Added menu options to enable/disable EGC and GRCG
  emulation (yksoft1)
• Added options to enable/disable EGC and GRCG emulation
  (to emulate older hardware).
• Added PC-98 BIOS function to read 8x16 character bitmaps,
  which fixes "Power Dolls 2"
• BIOS now reports 16-color and EGC graphics. Some games
  that check the BIOS for capabilities may now begin to
  use 16-color graphics and EGC functions.
• Added PC-98 INT 18h function to read character font.
  This also resolves garbled text in TH01.
• PC-98 GDC emulation now uses cursor specification
  (line per character row) to determine whether graphics
  are doubled vertically or not. Several PC-98 games
  switch between 200-line (doubled) and 400-line graphics
  by programming the GDC directly, rather than through
  the BIOS.
• Added various video-related BIOS variables to the data
  in PC-98 mode.
• GDC RESET/SYNC debug text updated to indicate which GDC
  is undergoing the RESET/SYNC.
• Debugger "LOG" command (CPU execution logging) fixed to
  automatically stop logging when the BIOS begins the
  POST routine after system reset. The user who invoked
  "LOG" probably cares more about what happened up to the
  game crash, fault and reset rather than normal BIOS startup.
• BIOS now properly unmasks the PC-98 cascade IRQ, which
  allows IRQ 8-15 to function, including the mouse (IRQ13)
• Debugger interface now indicates whether 80386 paging is
  enabled or not at any time.
• Help text updates to reflect DOSBox-X changes (Shane32)
• BIOS INT 13h emulation updated to support up to 4 hard
  drives (Shane32)
• IMGMOUNT and BOOT code cleanup (Shane32)
• IMGMOUNT RAM drive support: Additional fixes and geometry
  work done, and some hangs resolved (Shane32)
• CPU emulation fixed to allow setting a breakpoint on
  ANY interrupt of a specific number, not just software
  interrupts. It is now possible to use BPINT to break
  upon hardware (IRQ) interrupts.
• DOS kernel fixed to drop to the debugger if the MCB
  (memory control block) chain is corrupted, so that
  the corrupted state can be examined. When the debugger
  continues execution, a full restart of the DOS kernel
  is run. If DOSBox-X was compiled without the debugger,
  then the normal E_Exit() path is still taken.
• Added debugger command to show, and modify, the state
  of the PIC (interrupt controller).
• Added debugger command to view or change the A20 gate.
• Added debugger command to view the state of EMS, memory
  handles, allocation, and EMS page frame mapping.
• Added debugger command to view the state of XMS, memory
  handles, and allocation.
• Added debugger command to view the layout of the ROM
  BIOS region (0xF0000-0xFFFFF) chosen by emulation.
• DOS kernel now logs kernel allocations, which can be
  seen in the debugger using the "DOS KERN" command.
• Added "RUN" command as an alternative to hitting F5.
• Added "RUNWATCH" to the debugger, so that watching the
  system run in the debugger is possible.
• Debugger data window can now be used to view memory in
  segmented, virtual (through paging), and physical (bus
  address) modes.
• Debugger window data and code view windows now indicate
  regions of memory that are beyond the end of the segment.
• Debugger window data and code view windows now indicate
  regions of memory that are paged out (will cause a page
  fault if accessed)
• PC-98 A20 gate I/O port F6h fixed to work properly as an
  enable or disable, rather than just an enable. The PC-98
  version of HIMEM.SYS no longer complains about not being
  able to control the A20 gate.
• IMGMOUNT RAM drive support: Ramdrive bug fixes and changed
  drive limits from ATA limits to BIOS/MBR (Shane32)
• INT 21h fixed to use BIOS INT 1Ch to read date and time in
  PC-98 mode. Arrowgun now runs properly.
• Fixed EMS emulation not to claim XMS memory (and zero BIOS
  extended memory size) if EMS emulation is in EMS board mode
  (and therefore not allocating extended memory through HIMEM.SYS).
• PC-98 INT 1Fh extended memory copy implemented. DOS games in
  PC-98 mode can now use this API to access extended memory.
• Fixed HIMEM.SYS emulation in PC-98 mode to zero BIOS extended
  memory values when claiming extended memory.
• PC-98 mode now sets BIOS data area values correctly regarding
  conventional and extended memory.
• Added rudimentary emulation of non-volatile RAM at the
  trailing edge of text RAM (A3FE0-A3FFF).
• PC-98 mode now adds additional BIOS data values at boot time
  so that guest OSes like PC-98 MS-DOS can see the floppy drive,
  see keyboard input, and determine the boot drive properly.
  It is now possible to boot MS-DOS in PC-98 mode.
• Added rudimentary PC-98 INT 1Bh BIOS interrupt, at least for
  floppy disk emulation.
• Cleanup and formatting enhancements to IMGMOUNT ramdisk (Shane32)
• DOS CON emulation in PC-98 mode now emulates two additional
  ANSI escapes to clear the screen that are specific to NEC's
  MS-DOS implementation, which fixes text layer problems with...