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BizHawk/waterbox/o2em/CHANGELOG

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v1.18: 01/15/2007
- added the option -biosdir to define bios directory path
- added the option -romdir to define rom directory path
- added the option -help to help display
- directory search fix : When you don't have the "roms/" and/or "bios/"
directory, the program will dump core (by Walter de Jong).
- O2Launcher works now, o2em ignore roms and bios path if o2Launcher
is running.
- quad display fix: changed the way quad chars are drawn, fixes problems
in KTAA as well as score display in Black Hole and Red Baron (Soeren Gust)
- support for Soerens MegaCART bank switching (Information about
how to use this will be included in the next verison of Soerens
Bios-Documentation) (Soeren Gust)
- new feature in debugger: savevpp to make an uncompressed dump of the VPP
screen and slide data (Soeren Gust)
- dis48: fix to work under linux again (Soeren Gust)
- init_sound volume is not set to maximum (By Gunter Wambaugh)
- added makefile and options for freeBSD (By Gunter Wambaugh)
- Other minor fixes.
all the next changes were implemented by Manopac:
- added the option -s0 to redefine the system keys (see o2em.txt for usage)
- bugfix: highscore-file is only written if scoretype is set
- changed Default Stick 1 key from right <Control> to "L" to enable Fire and
movement at the same time
- two joysticks can be used now: first stick in command-line is mapped to joystick 1,
second to joystick 2 (compatible to old command line options)
- changes in debugger: status of registers is now displayed after instructions
are executed
- new features in debugger: savedatah and savedatab to save data from memory
as sourcecode ("db xxx")
- changed Default Stick 1 key from right <Control> to "L" to enable Fire
and movement at the same time
- two joysticks can be used now: first stick in command-line is mapped to
joystick 1, second to joystick 2 (compatible to old command line options)
- changes in debugger: status of registers is now displayed after
instructions are executed
- new features in debugger: savedatah and savedatab to save data from memory
as sourcecode ("db xxx")
- removed the limit that KTAA was the only 3K enabled rom (every
rom divideable by 3K is allowed now)
- dis48: added option -bios to disassemble bios (start at address 0)
- dis48: empty line after each page
- new feature to save the highscore in games (F6 to set in game)
- new feature to save/load state (F2/F3) (with command line option savefile)
- new features in debugger: savevdc and saveext to save data from Extram and VDC
- new feature in debugger: viewsprite
- new feature in debugger: bp (breakpoint) - o2em runs with output until
breakpoint is reached (bpc to clear)
- new feature in debugger: so (step over) - runs to next instruction in memory
- more explicit register display (P1 & PSW)
- fixed the "double size sprites are shifted only 1 instead of 2 pixles" bug
- new features in debugger (load / save file, change values in memory,
assemble to memory)
v1.17: 05/01/2005
- BIOS identified by CRC, to activate a specific BIOS type: -o2rom, or
-g7400, or -c52, or -jopac. The old form can be used. See O2EM.txt for more.
- Automatic identification of BIOS VP+ when the selected game is only VP+.
- Creation of the standard directories (ROMS, BIOS, VOICE) when uncompressing
O2EM archive.
- ATLANTIS, FROGGER, COMANDO NOTURNO and CATCH THE BALL now work without
graphic bugs. This correction is based on a specific patch for each game.
Thanks Rafael Cardoso for reports these bugs.
V1.16: 12/28/2004
- Fixed a slowdown in Pick Axe Pete (based on a patch by Arlindo de
Oliveira).
- Reverted back to the old palette for O2 games, while using the new
palette for Videpac Plus games (selected based on bios version in use).
V1.15: 12/12/2004
- Added support for 12kb and 16kb games. Trans American Rally+ works now.
- Added fixes to the VP+ gfx emulation made by Soeren Gust. Flashpoint
works properly now.
- Fixed a bug in the Windows-specific emulation timing code that caused
the emulator to crash when run on a Windows machine which was on for a
few days without a reboot.
- Fixed a bug in the emulation of the DAA instruction, which caused bugs
in the score of several games (Le Tresor Englouti, Cosmic Conflict, etc.).
- Fixed instruction timings (patch by Soeren)
- Modified the palette to use values calculated from the Videopac+ RGB
encoder specs by Ren<65> van den Enden, instead of guessed values.
- Other minor fixes.
V1.01: 10/23/2002
- Major speed optimization.
- Implemented VDC <-> VP+ collision detection.
- On the original machines it is possible to make all VDC
colors bright by clearing P17. This affects the background and
dark grid colors. Implemented. Now the Killer Bees! intro screen
works correctly.
- Fixed the wrong color order when mixing between VP+ and VDC graphics.
Jopac Moto Crash now works. Fixed by Soeren Gust.
- Now the VBLANK pulse is visible on the T1 input. This can be used
to differentiate between PAL and NTSC.
- Other minor fixes.
V1.00: 09/12/2002
- Implemented complete Videopac+ G7400 emulation. Implemented it from
scratch, based on the EF9340/41 datasheet (sent by Simon Scudder), on
the technical docs made by Soeren Gust and disassembling the VP+ bios.
You will need a Videopac+ bios image file in order to use this feature.
You can use the -bios option to select it, rename the file to o2rom.bin,
or select it in O2EM Launcher settings. Please note that a few O2 games
do not work with the VP+ bios, so most likely you will need both bios
versions to be able to run all the games. For copyright reasons these
files are not included with O2EM, but you can find them in the Internet.
- Added a default configuration file. Now you can specify your preferred
options in a configuration file, instead of typing it every time you
execute the emulator. The command line options override the default
settings in the file. See O2EM.txt for more.
- Extended the -s1 and -s2 switches to allow customizable keys with the
joystick emulation. Based on a patch written by Zimmerman that
implemented customizable keys it in a different way. See O2EM.txt for
more.
- Added support to the Four in 1 Row game.
- Added the -exrom switch to enable the use of a special ROM mapping mode.
See O2EM.txt for more.
- Improved the sound with Frogger and Popeye.
- Minor fixes.
V0.90: 08/07/2002
- Fixed the color palette, based on screen shots from a real O2 console.
- Fixed a bug in the sprite drawing priority. Now in several games the
sprites look better (Demon Attack, Turtles, Atlantis, Computer Golf,
Football, Helicopter Rescue, etc.).
- Modified the emulation of sprites and characters in the border region of
the screen. Fixed the bug of character wrapping to the other side of the
screen and other problems (Atlantis and others). Now the main characters of
P.T.Barnum's Acrobats! do not fall from the edge of screen.
- Fixed the audio pitch and implemented white noise emulation. Now
explosions sound much better!
- Fixed a background line blinking problem that used to affect lots of
games.
- Fixed the color bar at the left of the screen.
- Enhanced the support for European/Pal games. Now several games look and
play better. Shark Hunter intro works correctly. Frogger and Depth Charge
are fully playable !
- Implemented an audio filter that accurately emulates the behavior of the
low-pass filter present in the audio output of the real console. The sound
is better now. (Enable it with -filter).
- Fixed the screen size. Now you can see all the graphics in the game,
including the time in Labyrinth.
- Implemented Dot Grid emulation. Now Marksman is playable.
- Implemented a cached video emulation, to make it run faster with slow
machines / video cards.
- Implemented screen shots (use the F8 key and the -scshot option)
- Implemented the sprite shifted/smooth modes. Now the main character of
Q*bert looks hi-res.
- Several minor fixes.
The following fixes were made by Soeren Gust:
- Implemented the missing JNI instruction.
- Implemented the 1kb data ROM / 3kb program ROM addressing mode used by
Musician.
- Fixed the height of the grid lines.
- Added support for 3Kb per bank
V0.87: 06/21/2002
- Fixed a collision bug introduced with version 0.86.
Now Cosmic Conflict runs again. Thanks to Dan Boris for reporting
this bug.
- Implemented the option to set the O2 bios file name/dir, as
requested by my friend Heitor, to enable him to support it with his
nice O2EMLauncher frontend for O2EM 0.8x, as requested by its users.
Get O2EMLauncher here: http://www.odyssey.com.br/o2emlauncher/
Version 0.86:
- Fixed a bug in the drawing of quad characters. Now you can play
Q*Bert and Nimble Numbers Ned. Some other games will also have
improved graphics or text (Popeye, Super Cobra, etc.) .
- Fixed another bug in the collision detection. Now Demon Attack
works correctly.
Version 0.85:
- Fixed the collision detection. Now you can play Killer Bees!
- Implemented partial support to mid-screen changes to the VDC
registers without interrupts. Now several games look better, and some
that didn't work can be played, including Power Lords and Super Cobra.
- Fixed a bug in the video emulation that made some games like Turtles
and Shark Hunter appear with some strange static characters.
Version 0.80:
The following changes were already implemented by Daniel Boris in version
0.701. Implemented them again in the sources based on version v0.65:
- Fixed a bug in the CPU core related to the handling of branch
instructions near page boundaries. (Without it Sid the Spellbinder
crashed after the first level).
- CPU core now jumps to the correct address on an external interrupt.
Killer Bees runs again.
- Fixed shape of '$' character and added missing 64th character to
character set (ripped the correct character data from the v0.701
executable file).
- Fixed bug in drawing of bottom grid line.
- Added Voice support. Re implemented it from scratch, based on O2
technical specs released by Dan Boris and disassembling Smithereens
and Turtles (now it always work with Turtles).
The following changes are new to version 0.80:
- Updated the code to compile with Allegro 4.0.x and to work
without changes under Windows, Linux and DOS, with optimizations
for each.
- Implemented the option of windowed or fullscreen video modes,
with scaling, centering and optional 50% scanlines.
- Cleaned the code to make it more portable and maintainable.
- Improved timing, using the most accurate way available for
each platform.
- Fixed the keyboard scan code translation table.
- Fixed and improved the built-in debugger.
- Fixed the reset. It now works with Turtles.
- Fixed joystick detection code.
- Implemented variable speed control relative to original O2.
- Implemented individual volume control for sounds and voice.
- Implemented Pause/Information (F1).
- Avoided collision of keyboard input with key joystick
emulation. Now Caps Lock enables/disables the W,D,S,A,Space keys
for keyboard input when they are used by joystick emulation.
Works well with games like K.C.'s Krazy Chase.
- It now releases more CPU time to the system (if possible).
- Other minor changes/fixes.
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