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# $Id: README.History,v 1.60 2005/10/01 14:28:15 thor Exp $
#

Atari++ 1.00:
	-The first public release.

Atari++ 1.01:
	- Improved the disk-drive built-in .EXE bootstrap code.
	- Added snapshot files
	- Fixed bug in list management that sometimes
	  crashed the directory requester of the menu.
	- Fixed bug in the menu configuration saver that
	  put simply invalid options into the configuration file.
	- Paddle management: No longer enables/links paddles #0,#1
	  by default to avoid kludging with the digital joysticks.
	- Integrated 5200 game console emulation.
	- Fixed/improved cartridge management: The menu will now show
	  only the useful cart types for the selected file.
	- Added SDL sound support.

Atari++ 1.02:
	- Fixed several cartridge related bugs left from the 1.01.

Atari++ 1.10:
	- Major change: Atari++ is now cycle based rather than scanline
	based. This means that games using a horizontal kernel will work
	now correctly. Hence, a completely new CPU concept has been used,
	and GTIA and ANTIC have been reworked to a major degree.

Atari++ 1.11:
	- Forgot to catch an Io exception in the menu class causing
	the emulator to abort if a file could not be found.
	- Fixed GTIA modes 0x40, 0x80 horizontal COLBK register change
	- Adjusted timing defaults to fix Alternate Reality.

Atari++ 1.12:
	- Re-worked cart-management completely now, this is more expandable
	  and easier to manage than previous versions.
	- Various minor bug fixes.

Atari++ 1.13:
	- Fixed the BRK emulation of the CPU.
	- Fixed X11 frontend reaction if it has no focus.
	- Added emulation of XEGS cartridges
	- Fixed a GTIA player/player collision detection bug
	  introduced in the 1.10 release.
	- Enhanced the cart emulation again.
	- Added emulation of the RTime8 real-time clock
	  pass-thru cart.

Atari++ 1.14:
	- Added emulation of the Bounty Bob cartridge.
	- Fixed some bugs in the SDL frontend.
	- Fixed a bug in the user menu that lost the command
	  line defaults when switching the front-end.
	- Added a new OssHQ audio frontend that provides excellent
	  quality without requiring a very precise Oss interface.
	- Enhanced and updated the SDL sound output noticably. It is
	  now able to generate software speech as well.

Atari++ 1.15
	- Added emulation of Axlon like RAM-Disks.
	- Moved 130XE Ram disk into a separate module, reworked MMU 
	  ramkdisk handling.
	- Reworked file requester.
	- Fixed H: handler directory handling.
	- Fixed ATR image handling.
	- Added "install" and "uninstall" make targets.
	- Moved archive into a separate subdirectory.

Atari++ 1.16
	- Added support for .dcm images and for .gz compressed
	  images of all kinds in general.
	- Fixed an ANTIC timing problem for LMS instructions for
	  text-based mode lines.
	- Fixed the directory requester of the GUI, again.
	- Fixed the cycle count for several CPU instructions that
	  seem to have escaped earlier test.
	- Added more autoconf tests for working compilers, most
	  notably for working exceptions and for icc specific
	  compiler setttings.
	- Added autoconf specialization for the intel icc
	  compiler for better performance.
	- Made several adaptions and stronger typing that
	  might help porting the code on other compilers.
	- Several other minor bugfixes.

Atari++ 1.19
	- Changed the licence conditions to TPL (almost identical
	  to the MPL).
	- fixed a fatal bug in the SDL audio output that could
	  have caused buffer overruns.
	- Fixed audio sample counter to reduce complexity.
	- Modified RT8 cart support. The current emulation model
	  makes a bit more sense than the old implementation.
	- ANTIC modeline speedup by using a different lookup table
	  concept.
	- Changed the WSYNC logic for CPU and ANTIC.
	- Simplified GTIA/CPU cycle coordination.
	- POKEY audio generation makes now use of some LUTs to 
	  speedup the polycounter usage.
	- Added proper error handling: Run time error conditions
	  are now properly reported by a graphical requester.
	- Added a warning log: Warnings get now reported within
	  the GUI and not on the command line.
	- Added a licence agreement requester.
	- Added an interface for SDL joystick emulation.
	- Improved compatibility of the code by adding even
	  more autoconf tests.
	- Split the CPU instruction build-up into several
	  subroutines to avoid some branch-distance problems
	  on some platforms.
	- Added a requester before shutting down the program.
	- Made handling of missing Os ROM images more user
	  friendly.
	- Added a flag to disable the monitor for novice
	  users.
	- Added a pretty-printer for the command-line help.
	- Removed an unnecessary window-pop up that sneaked
	  into the code in 1.18.
	- Implemented precise POT reading emulation for
	  POKEY.
	- Modified and fixed boot loader for binary image
	  files.
	- Fixed BASIC Rom handling on an error.
	- added various workarounds for popular compiler bugs.
	  The existing code should be easier to port now.
	- Added abstraction layers for time and curses
	  includes.
	- The OsROM layer will now check a "roms" subdirectory
	  for missing ROM images automatically.

Atari++ 1.20:
	- Fixed name resolution in the generic device handler.
	- Fixed handling of DD disks.
	- Fixed error handling within the menu.
	- Added emulation of various XE like RAM expansions
	  that use bankswitching controlled by PIA Port B.
	- Fixed endian dependentness of Antic emulation.
	- Fixed a possible CPU pipeline trash on the G.M
	  monitor command.

Atari++ 1.21:
	- internal pre-release that already covered a lot of
	  1.22 options but didn't make it to the public.

Atari++ 1.22:
	- fixed another set of bugs in the audio frontends that
	  could have caused memory trashes for stereo or 16bit
	  output.
	- added a separate palette for GTIA in NTSC mode
	  (thanks, James!)
	- integrated a lot of James' Win32 adaptions. Maybe
	  this code now compiles under Windows.
	- added ALSA sound front-end for high-quality/
	  low-complexity sound.
	- Added Matthias' AtariSIO frontend allowing you to
	  connect real 1050 or 810 drives to the emulator.
	- Fixed a bug in the monitor that rendered it 
	  useless if compiled in "release" mode.
	- Added partial "Us-Doubler" emulation for the 
	  diskdrive.
	- Improved the SDL GUI front-end for better
	  performance in rendering the user menu.
	- Fixed Shift+TAB for the X11 front-end.
	- Finetuning on the Autoconf process.
	- Finetuning in the timing.
	- Added schematics of the "ElCheapo" joystick
	  interface.
	
Atari++ 1.23
	- Updated the AtariSIO interface to the 0.11 version
	  of AtariSIO (Thanks, Hias!)
	- Fixed the "TraceOnReset" option.
	- Added options to hold the two other console keys
	  ("select" and "start") on reset, for symmetry
	  reasons.
	- Made several fixes to the H: handler that should now
	  be compatible to the DOS 2.XL/XA XIO command set except
	  for "binary load".
	- Improved the detection of the HATABS init location that
	  no longer uses fixed ROM addresses.
	- Added rules to generate documentations by doxygen.
	- Fixed Pokey XMTDone interrupt handling.
	- Internal cleanup in the memory management.
	- Added a new optional Os patch: The MathPackPatch
	  replaces all entries of the MathPack by calls to the 
	  host system math library, making mathematics on the 8 bit
	  noticably faster. Especially AtariBasic profits from this
	  patch. TurboBasic, on the other hand, has its on set of
	  math routines that are not covered by the patch.
	- Reworked gtia heavily. GTIA emulation now includes proper
	  intra-scanline modification of PRIOR, i.e. toggling
	  between a processed mode like Gr.9..Gr.11 and an un-
	  processed mode in a horizontal kernel. GTIA also 
	  supports horizontal splitting of players, proper
	  collision detection for these splittings and support for
	  some wierd undocumented GTIA modes (RIP,HIP,...), as
	  for example disabling of modes 0x40 and 0xc0 within a
	  horizontal scanline.
	
Atari++ 1.24
	- Worked around a g++ 3.2.2 bug that trashed the GTIA code
	  successfully if compiled in release mode. g++ 2.95 or icc 7.1
	  do not show this bug in the code generator.
	- Fixed again pokey XmtDone interrupt handling.
	- Added a "quick" user menu that provides the most important
	  options by pressing the left mouse button if the mouse hasn't
	  been used as a game port input device.
	- Fixed a couple of minor preferences handling bugs on the way.
	- Fixed a bug in the mathpack emulation core that forgot to
	  set two registers in the BCD->ASCII conversion.
	- Added an emulation of the 850 interface box. This emulation
	  supports all the private SIO commands of the 850 interface,
	  allowing you to use the serial port of the PC by the emulator.
	  Unlike the 850, only one serial line is available, but otherwise
	  all options are supported. The only exception are some of the
	  wierder baud rates the 850, but not the UART in the PC, is able
	  to generate.
	- Enlarged/completed autoconf; added a couple of options to
	  enable/disable subcomponents of the emulator on demand.

Atari++ 1.25
	- Fixed a couple of bugs of the 850 interface and the R: driver
	  built into. This includes fixes in the handler startup,
	  fixes in the baud rate selector that didn't get forwarded to
	  pokey, and fixes in the buffer handling.
	- Redesigned the audio output interface drivers.
	- Added the emulation of the stereo pokey hardware hack and
	  added apropriate options. Thanks once again to Andreas
	  Magenheimer for providing demo programs for testing this
	  new feature.
	- Improved PIA PortA/BCtrl register emulation.
	- Improved Pokey audio emulation by also including the function
	  of the serial port control register SkCtrl into the audio
	  generation.
	- Improved audio emulation is now also able to generate the SIO
	  "sound effects"; this is an optional feature as some users
	  might consider the native Atari SIO sound as anoying.
	- Improved Pokey serial timing that is now computed from the
	  pokey timers and the serial transfer mode.
	- Added more graphic formats for the screen snapshot feature.
	  Atari++ now also supports BMP and, if the libpng is available,
	  PNG snapshots. This is configurable thru the SDL or X11 inter-
	  face options.
	- Fixed H: handler EOF handling and delete protection of write-
	  protected files.
	- Modified SIO interface routines to allow synchronous single
	  byte transfers.
	- Added workaround against some SDL bugs.
	- Fixed CPU Sync() bug that could have caused segfaults.
	- Fixed ALSA channel allocation bug.
	- Fixed disk drive HD format; this used to generate invalid
	  ATR files, but not any more.
	- Added disk "Eject" button.
	- Fixed various SIO related error reporting bugs.
	- Fixed CPU BRK instruction stack.
	- Fixed ANTIC VBI generation.
	- Various other minor bugfixes.

Atari++ 1.26
	- Restructured the serial device/SIO interface for the
	  user space SIO by Hias
	- Fixed fixpoint rounding for the math pack emulation
	- Fixed possible SegFault in the .wav audio front-end
	- Added Visual Studio C++ 7.1 compilation target.
	- Adaptions/modifications for g++-3.3

Atari++ 1.27
	- Fixed the overly picky user menu that did not catch exceptions
	  due to invalid configurations.
	- Reworked the Basic interface that now also accepts generic 8K
	  cartridges as ROM images.
	- Heavily bugfixed the AtariSIO interface, also in DirectSerial
	  mode. This should work fine now.
	- Extended the printer emulation; it now also allows printing to
	  files.
	- Added zlib support for the win32 platform and hence support for
	  .gz compressed disk image image files.

Atari++ 1.28
	- Fixed a bug in the 130XE RamDisk handling that checked the
	  wrong bit to test for CPU access.
	- Fixed a missing screen refresh in the SDL frontend.
	- Fixed H: device directory handling, win32 delivers an error
	  code here unlike POSIX.
	- Added smarter speed control that also allows the emulator 
	  to run faster than a real Atari. Updated sound support 
	  for that.
	- Added a html version of the guide.

Atari++ 1.29
	- The console key "keypress generator" is now a bit more
	  conservative and tries to avoid faked key events for
	  warm starts.
	- The analog joystick interface and its SDL counterpart
	  support now up to 16 buttons.
	- The binary loader analyses and checks now the images
	  before loading them into the emulator. This test is
	  now also able to perform some simple repair algorithms
	  on the images for typical failure cases.
	- The H: device supports now the XIO 41 "binary load"
	  command using some higher trickery. This emulation
	  should be compatible to some auto-loaders, e.g.
	  TurboBasic.
	- Fixed another bug in the pattern matching code of the
	  H: device.
	- Added open mode modifiers for the H: handler similar to
	  those supported by Dos 2.XL:
	  /A: Open in append mode,
	  /D: Open for directory,
	  /N: Do not run programs.
	- Default for win32 architecture frontend is now the
	  window'd mode, full screen can be enabled by the user
	  in the full configuration menu.
	- Added emulation of the 1200XL and its 1200ROM. This
	  ROM requires special threadment due to an Os bug.
	- Fixed gameport search for multiple joysticks.

Atari++ 1.30
	- Added double-buffering option for the SDL frontend
	  if the SDL implementation provides it. Currently, only
	  the win32 port can do that.
	- Added support for Steven J. Truckers Flash Rom (ATARIMAX)
	  cartridge. Thanks, Steven!
	- Added more call-ins for the mathpack patch that are
	  inofficial but called by Basic and Mac/65.
	- Fixed Math-pack patch ZFR1 call-in.
	- Fixed several AtariSIO memory leaks.
	- Reworked parts of the cartridge management, making cart
	  type selection simpler.
	- Added MegaROM and Atrax cartridge types.
	- Fixed again a bug in the H: device, it did not accept
	  some valid file names.
	- Fixed error reporting in the disk insertion code.
	- Fixed XFD image validity checks.
	- Added a built-in OsROM. Now Atari++ does no longer require
	  an external binary ROM to function. This built-in ROM is
	  an AtariXL type ROM under my copyright that, however, lacks
	  the math pack that cannot be rewritten without copying the
	  original binary. Thanks to the mathpack patch, the new Os
	  ROM will work nevertheless correctly with programs requiring
	  the math-pack.

Atari++ 1.31
	- Fixed keyboard support for the 5200 games system.
	- Fixed reset/console key support on reset.
	- Added display postprocessor resp. de-blocking filter for the
	  SDL frontend. This generates smoother graphics on upsampling
	  the low-resolution Atari displays.
	- Added emulation of special PAL color mixing artifacts.
	- Added flicker fixer that emulates slow TV screens used by some
	  programs to generate more colors by altering fast between two
	  color sets.
	- Added more cartridge types.
	- Reworked cartridge support subsystem a bit.

Atari++ 1.32
	- Fixed a bug in the string gadget that caused a race condition
	  in the file requester.
	- Improved timing issues for GTIA and ANTIC. Users of previous
	  releases might want to set the DLIDelayCycles to 12 and the
	  BeforeDisplayCylces to 16 to adapt to the new settings.
	- Fixed a potential segfault in the X11 display when switching
	  between PAL and NTSC output.
	- Fixed command line parser for the win32 front-end. This was a
	  bit hairy since a custom startup code for win was required for
	  that.
	- Added an optional console output window for the win32 port that
	  is used for the monitor. Sorry, there is no ncurses/curses
	  support because no suitable curses library is available for the
	  win-world. The monitor will not be able to provide the SPLT
	  command because of that, but everything else will work (just
	  not that fancy...)
	- Fixed disassembly of some ANTIC commands.
	- Fixed a missing initialization in the line drawer of Os++.
	- Fixed default behaviour of printer emulation of no print
	  spooler is available. PrintToFile is then the default.
	- Speedup GTIA priority engine a bit.

Atari++ 1.33
	- Improved the runtime behaivour of the CPU a little bit, it might
	  be a bit (likely unnoticably) faster.
	- Added proper emulation of artifacts on colored background. Thanks
	  to Slor for making pictures of the real NTSC artefacts. The
	  resulting emulation is an emulation and not yet 100% accurate, though
	  much closer than before.
	- Fixed a compilation/configuration error. On some systems, libSDL
	  requires explicit linkage against libpthread.
	- Added a keyboard type-ahead buffer that allows you to type faster
	  than the emulated Atari is able to react. This avoids swallowed
	  keyboard events.
	- The Percom/815 and Happy floppy drive extended command sets can now
	  be disabled or enabled to avoid compatibility problems with software
	  that requires that certain commands fail on the disk drive.
	- The GUI supports and recognizes now the scroll wheel available on most
	  modern USB and PS/2 mice.

Atari++ 1.35
	- Fixed a segfault in the file/directory requester due to a buffer overrun
	  when extracting the file or path-part of the selected path.
	- Pokey emulation of the low-part of 16 bit counters was incorrect up to
	  this release. This fixes sound effects of various Basic type-in listings.
	- Added finer Pokey volume control.
	- Added emulation of Pokey nonlinearities.
	- Antic DLI timing was partially incorrect, the DLI signal was generated
	  one cycle too late with DMA registers sampled too early. Users of earlier
	  releases should adjust their preferences and set the "BeforeDLIClocks" to
	  eleven (11) instead of twelve.
	- Added emulation of Antic DLI behaviour if the CPU is stopped. ANTIC does
	  not generate an NMI signal immediately, but waits again for the next
	  possible NMI generation slot in its horizontal scanline.
	- Fixed the behaviour of the backspace key/control code in the S: handler of
	  the built-in Os emulation. This fixes a couple of Basic games.
	- Fixed a critical bug in the Pokey emulation that could have caused crashes
	  on startup due to non-initialized variables.

Atari++ 1.36
	- Fixed broken gadgets when the scrollwheel was used.
	- Fixed ANTIC instruction fetch for disabled DMACtrl. This fixes one
	  wierd demo.
	- Added a monitor stack traceback command.
	- Fixed cycle allocation for pre/post VBI gap of the ANTIC display list.
	- Fixed parsing of memory extensions.
	- Fixed a valgrind hit in the CartROM initialization.
	- Made patch-device support (P:,H:,D:) a bit safer by testing for 
	  valid IOCBs.
	- Fixed x11 truecolor buffering that sometimes forgot to offer an RGB
	  frame buffer.
	- Fixed handling of non-ASCII keyboard events (e.g. german umlauts) that
	  were not properly ignored before.
	- Fixed length of VBI, the Antic emulation stole nine cycles too many
	  for out-of-display length.
	- Fixed GTIA/CTIA detection and output of undefined registers for GTIA.
	- Added a new sound front-end, namely DirectX sound support for the
	  win32 platform. Audio output is much smoother now.
	- Fixed MMU emulation for XE-style extended RAM disks.

	
Atari++ 1.37
	- Fixed two files that did not compile correctly without the SDL devel
	  libraries available.
	- Fixed the flashrom cartridge disabling logic.

Atari++ 1.38
	- Fixed again a wrong timing in the antic module.
	- Modified Pokey SIO sound generation, should be better now.
	- Fixed horizontal changes of the Antic character generator.
	- Fixed handling of the Numpad keys for some X11 implementations
	- Minor adaptions for g++-3.4.1

Atari++ 1.39
	- Added a serial transport interface allowing portable serial
	  communications from Linux and Win32. This allows this release
	  to enable the 850 Interface box and AtariSIO implementation
	  for Win32.

Atari++ 1.40
	- Fixed random generator for Win32 platforms. This might have
	  broken some games.
	- Fixed attract mode in Os++, both generation counter as
	  well its application in Gr. 9/10/11 with text window.

Atari++ 1.41
	- Fixed the location of the VBI interrupt. It happened one line 
	  too late.
	- Fixed unitialized accesses in Pokey.
	- Fixed NMI status read in antic, the lowest bits are always set.
	- Fixed VSCROLL overflow emulation for 8 line text modes.
	- Added 65C02 emulation (experimental)
	- Added more joystick buttons, to be used to trigger 5200
	  keyboard events.
	- Added emulation of a mathpack feature, namely to terminate
	  the ASCII converted floating points with a decimal dot even
	  if the number is an integer.
	- Fixed the configure script, works now fine on MacOs.

Atari++ 1.42
	- Fixed race condition when switching the resolution, could
	  cause crashes.
	- Fixed Antic CHARBASE switches, did not keep care of
	  horizontal scrolling correctly.
	- Fixed leaking key presses from the GUI to the core.
	- Fixed PIA Port A handling, Port A input is non-buffered.
	- Fixed Monitor backspace key on some broken ncurses
	  implementations.
	- Added "graphical" single-step trace command for the monitor.
	- History of the monitor is now a tad smarter and buffers un-
	  finished lines.
	- Fixed "dummy writes" for INC and DEC commands.
	- Fixed player horizontal split, did erraneously remove the
	  old player.
	- Fixed timing of the pokey timers, should be more precise
	  now.
	- Fixed XIO for serial baud generator, argument zero leaves
	  baud rate alone.
	- Fixed serial input counter for concurrent mode
	- Fixed state parser, is now less sensitive to CF/LF vs. LF
	  confusion.
	
	
Atari++ 1.43
	- Added a resident R: handler that can be patched in as a
	  replacement for the 6502-based R: handler that is 
	  bootstrapped from the interface box.
	- The R: handler code now resets the replacement character
	  that is dropped in whenever a non-ATASCII character arrives
	  at the serial input.
	- Worked around the sound problems that appear due to the
	  unbalanced audio output; this release offers an additional
	  high-pass filter in the pokey output that avoids any offset.
	- The pokey keyboard disable bit was not emulated at all.
	  Setting this bit now disables all keyboard activity.
	- Fixed the emulation of the Atari/INVERSEVID key and related
	  keys; the corresponding key-up event was never forwarded
	  to the kernel.
	- Updated the manual; forgot to include the position of the
	  Atari/INVERSEVID key in the manual.

Atari++ 1.44
	- Fixed the SetIRQ service routine of the built-in Os.
	- Fixed (again) the Antic NMI/DLI generation.
	- Fixed CPU handling of the WSYNC register (broke Atlantis)
	- Fixed the keyboard handler of the 5200 emulation which
	  did not generate the up/down bits properly.
	- Fixed the light pen code generation.
	- Fixed parts of the 65C02 emulation, zero page access was
	  not extending properly to page 1.
	- Fixed a lot of compilation problems on 64 bit architectures,
	  special thanks goes to Alexander Müller for helping me to
	  hunt down these bugs.
	- Fixed the SDL detection in configure.
	- Fixed the player generation logic again a bit, did not
	  support horizontal player splitting quite as it should.
	- Improved the emulator handling of warnings, you can now
	  go back to the menu.
	- Added emulation of 1050 internal diagnostic commands.
	- Fixed SIO return codes for SIO bypass routines.