DOSBox Changelog

What's new in DOSBox 0.74-2

Aug 31, 2018

Rewrite auto/max cycles algorithm to work better with windows 7, other OSes might benefit as well.
Update 64bit recompiler to work on OSX and Linux.
Several improvements to make the recompilers work with newer compilers and add some workarounds about clang confusing itself.
Fix several variables being the wrong size in the recompiler.
Support absolute 64 bit addressing. (DRC:64 bit error messages)
Zero extend data in dynrec core for LLVM compilation/
Reduce overhead of the Mac version with a lot. Results in a speed increase.
Replace NV_PixelDataRange with the more common ARB_PixelBufferObject extension. Should help with output=opengl.
Reuse graphics window if possible instead of always creating a new one!
Add patches to work better when called by WINE:
support WINE style namemangling.
allow Z: to be moved to a different drive.
Try to fix stuttering audio with opengl output on Linux. (or at least improve it. Linux users might need to increase the prebuffer option a bit)
Fix automake and autoconf problems.
Fix problems related to packed struct layouts.
Fix compilation on gcc 4.4 and gcc 4.6.1.
Fix compilation with -DPIC.
Hopefully fix crash on shutdown, when unknown condition is encountered.
Fix -lto with gcc.
Fix clang compliation with asm fpu core.
Fix mapper crash on startup and when changing the mapper key.
Fix compilation in VS2015.
Fix compilation on mingw64.
Fix compilation on Frisbee and newer clang.
Fix compilation machines that have X11 libraries installed, but use a SDL without X11.
Fix a few problems relating to video capturing:
Writing out the index too often. (slowdown with longer captures)
Not being aware of when only the refresh rate changed.
Fix call order when bitshifting the return order (VS C /O2 builds).
Fix sign-extension error in S3 draw funcion, i.e. win3.1 analog clock.
Fix expanddot not caring about the size of the inputbuffer.
Some fixes for the debugger related to starting a program through debug.com.
Bring OS/2 port code up to date.
Reduce the amount of warning when compiling with quite a bit.
Allow 15/26/32 bits input to the opengl output.
Add cmd-q as exit key for macs.
Fix icon and titlebar on very old setups.
Fix off by one display size calculation errors with very large displays.
Fix out of bounds access the unused byte in the 32 bit colour value of the hardware mouse cursor pixel was affected.
Fix depreciated warnings on Mac, allow soundfont loading for coreaudio.
Keep repeating a pressed key if another key was unpressed.
Fix crash on OS X related to putting junk in the titlebar.
Extend fullresolution=0x0 to work on Linux and Mac.
Change gameblaster and tandy sound core to latest mame version.
Improve numlock and capslock support on Linux and Macs. Still not perfect on Windows.
Added even more code to workaround Windows behaving weirdly with alt-tab.

New in DOSBox 0.74 (May 12, 2010)

Several small game specific fixes/hacks/support. (Offensive,
Roadhog, GTA installer, Kingdom O' Magic soundcard detection, Pirate booter, Armored Fist installer)
Add the S3-specific 640x480 256 color mode. (fixes regression in "Wooden
Ships and Iron Men" and "I Have No Mouth And I Must Scream")
Fix a stack overflow that could crash DOSBox.
Add fake microphone input. (fixes Talking Parrot)
Modify adlib turn off code, so that it doesn't turn off in cases where the same sound is repeated over and over again.
Several small fixes to the CDROM audio code. (HOMM2, Redneck Rampage and others)
Several improvements to the CDROM emulation code. (fixes Alpha Storm and GT Racing 97)
Some small CPU fixes that might fix something.
Handle opcode 0xff subcode 7 as invalid instruction. (fixes dif-2 & others)
Some hercules fixes. (Testdrive)
Improve support for blanked parts that wrap around to the start of the screen. (fixes Magic Circle demo and Sid&Al)
Remove old OPL cores as the new ones seem to work very nicely.
Modify movie recording code so that the movies aren't corrupt when you exit dosbox without stopping the movie.
Change RGB3x scaler to look more pretty.
Improve initial register values compatility of the GUS.
Added autodetection for Gameblaster. (games can find it now)
Change render preferences a bit to be more compatible with Windows 7.
Add DOS fixes to terminate program. (fixes Fortune Teller)
Add FFREEP. (fixes Trucks)
Improve FPU ST80 in C mode when writing zero. (fixes Antigok)
Add special int10 scanline function. (fixes mz700 and probably lots of games that mess with them)
Fix scrolling in rarely used video modes. (fixes Orphee)
Modify game specific hacks a bit so that Kick off 3 works again.
Lots of fixes to the INT10 video parameter table. (Seven spirits of ra and others)
Add VGA blanking in machine=vgaonly. (used by Alien Carnage)
CGA, PCJr, Tandy: Add video blanking, change display start latch timing, sync pulse width correction.
PCJr, Tandy: implement vertical retrace interrupt.
PCJr, CGA: line-by-line video emulation.
PCJr: support on-screen change of color modes 4medium to 16low. (used by Ghostbusters booter)
Hercules: Add green and amber monochrome support.
All machines: only update the video timing when needed. (Jungle Hunt, others that synchronize to the video screen might profit)
Several small DOS fixes.
Some UMB related fixes. (The Legacy without UMB)
Fix version number of DSP for SB 1.5. (fixes a few games)
Several VGA emulation improvements. (Allertone football manager)
Some Tandy fixes. (Mech Warrior)
Small improvements and fixes to the OPL emulation.
Add low level Tandy DAC emulation.
Some EMS fixes. (fixes Mortal Kombat and others)
Change SoundBlaster DSP reset mechanism, add sb irq acknowledge logic.
(fixes stmik-based applications)
Some interrupt pointer location modifications. (fixes Tinker Tales)
Some fixes to the BOOT code. (fixes Last Mission)
Respect write-only file information. (fixes Champions of Zulala)
Some RTC fix. (fixes Tully Bodine and others)
Improve mouse emulation to work better with Water World.
Hopefully fix the translation of the configuration file.
Speed up and fixes for the recompiler core. (pitfall2 pcjr)
Change memory start location. (fixes 7th Guest installer)
Several fixes to the batch file handling. (Shift and
use the typed first %0 instead of the parsed %0)
Improve file redirection and redirected line ends. (fixes
Phantasmagoria 2 DOS installer)
Fix compilation with new MAC os X version.
Add 16C550A FIFO support to the serial port emulation.
Improve modem emulation to get higher speeds.
Change default samplerates to 44100, blocksize to 1024 and prebuffer to 20, so that hopefully certain soundcards produce more fluent sound playback.
Add some rarely used, but for some games critical flags to the internal commands.
Add -userconf flag, so that the userspecific configuration can easily be used together with -conf configfile.
Improve internal timing with repeating timers (especially with the dynamic core).

New in DOSBox 0.73 (May 28, 2009)

New in DOSBox 0.70 (Mar 5, 2007)

New in DOSBox 0.65 (Mar 30, 2006)

Fixed FAT writing.
Added some more missing DOS functions.
Improved PIC so that it actually honours irq 2/9.
Improved intelligent MPU-401 mode so that more games work with it.
Some mouse fixes.
Changed DMA transfers a bit so they bypass the paging tables.
Added S3 XGA functionality.
Improved paging so that read and write faults are handled differently.
Rewrote exception handling a bit (no exception 0x0B with dos4gw anymore).
Added IO exceptions in all but the dynamic core.
Some ems improvements.
Added midi-device selection code for the windows hosts.
Fix crashes/segfaults related to the disabling of the pcspeaker.
Added some more FILES=XX detection tricks.
Fixed some vga detection schemes.
Fixed screenshot corruption when using -noconsole in a read-only directory.
Fix wrong scaled screenshots.
Added some hidden file functions when using diskimages. (helps with cdrom detection schemes)
Fixed a bug in the mixer code, that muted the music in certain games.
Added an assembly fpu core.
Made the shell more flexible for batch files.
Check for unaligned memory acces fixes hangups on ARM processors.
Some 64 bit fixes.
Added code to change configuration at runtime.
Improved ADPCM emulation.
Fixed a few cpu instructions.
Always report vesa 2.0 and fix some colour issues with vesa games.
Fix video mode 0x06 and 0x0a.
Improvements to the joystick emulation. 4 buttons are supported as well.
Add VCPI emulation for Origin games.
Fixed a lot of things in the boot code. Most booters work now.
Lots of improvements to the IPX emulation.
Rewritten modem emulation. Should work with more games.
Improvements to the dos memory managment routines.
Add UMB (upper memory blocks) support.
Emulate the pause key.
Improve Composite CGA mode emulation.
Lots of vga compatibility changes.
Improved support for chained video modes.
Improved mode and palette handling in cga modes.
Mount accepts ~ now.
Added a few of the EGA RIL functions.
Added TandyDAC emulation.
OS/2 support.
Improved and speed up the dynamic cpu core.
Fix some errors in the CD-ROM emulation layer.
Added an automatic work-around for some graphics chipsets.
Add PCjr support.
Allow mousedriver to be replaced. Fixes a few games that come with their own (internal) driver.
Improved dynamic cpu core so it can handle pagefaults and some obscure types of self-modifying code.
Added -noautoexec switch to skip the contents of [autoexec] in the configuration file.
Improved v86 mode emulation (mainly for Strike Commander).
Improved timer behavior.
Improved extended keyboard support.
Enhanced and added several DOS tables.
Made core_full endian safe.
Made pagefaults endian safe.
Add support for moviecapturing
Add support for 15/16/32 bit videomodes.
Add some more VESA modi (4 bit).
Add 1024x768 output.
Changed screenrendering so it only draws changes to the screen.
Allow remapping of the EMS page when the dma transfer was started from the page frame
Made EMS and DMA work together when playing from a mapped memory page.
Renamed several configuration options, so that they are unique.
Merged mpu and intelligent into one option.
Merged fullfixed and fullresolution.
Extended keys should be handled better.
F11 and F12 work.
Compilation fixes for various platforms.
Fix a few crashes when giving bad input.
Removed interp2x and added few new scalers.
Reintroduce the lockfree mouse. (autolock=false)
Add a larger cache for the dynamic cpu core.
Improved soundblaster DSP, so it gets detected by creative tools.
Lots of bugfixes.
Even more bugfixes.