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Working Atari 2600/VCS games on VirtualVCS

Atari 2600 Atari VCS Atari Jaguar

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#26 doctorclu OFFLINE  

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Posted Tue Apr 3, 2018 11:31 PM

Want to boldly explore some games on the Jaguar?

 

How about 50 roms with six 2600 roms a piece in each selectable 1 through 6 on the keypad?

 

Most of these don't work.   Out of 300 or so games I hope to find ... about 12 that work halfway decent.   If you do test these, let us know what games are playable to some degree or mostly all.

 

As I mentioned before all of these were selected because they did not have hardware detection in their code but use another method of software hit detection.   So it stands a chance of working.  (Except for the last four games in image 50 where I threw in some to see how they would display but know they have regular hit detection.)

 

So far we have Hangman, Flag Capture, and that Mario Brothers fan game that played just about right.  :P   Astrosmash mostly worked, and Frogger and Gorf are playable in their creative way while missing some display features.  So those are some examples of what we are looking for.

 

I can say for rom vvcs-01-0 the graphical demos at selection 1 (Core demo) and 5 (4K 4U) display a lot of the effects.  I'm impressed it worked as well as it did.

 

Pictures of the games in play (compared to the rom played on my 2600 emulator on my laptop in the lower right hand corner) are in the file "01-0"

 

RECOMMENDATION:

Don't have a skunkboard or other rom loader?   Do you have a way to load BJL style?   You can convert these roms to the BJL format using JIFFI.  Also can convert these to CD files, but that would be a lot of CDs.  Anyway, no need to be left out of the fun.  ;)

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#27 doctorclu OFFLINE  

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Posted Wed Apr 4, 2018 12:09 AM

I can tell you not to bother with rom 02-0.  (pictures below on how that went).

 

I skipped ahead to 50-Z which I mentioned before.  Most of it was a bust.  Then there was this 4K version of Venture.  The map screen didn't show the character movement.  This is common.  But after some playing around I would find myself in a room.  I could shoot the bad guys and they could kill me.  :o  But just couldn't grab the treasure in the room. 

 

It was explained to me that looking for 85 2c means STA CXCLR, which clears all detected collisions.  And that looking for that would weed out some games that might still work.  So what this means is, while I've weeded out likely ones that won't work (like in Superman and the original six games on this demo, and others) some might work to some level.

 

Good to know.

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#28 walter_J64bit OFFLINE  

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Posted Wed Apr 4, 2018 4:14 AM

doctorclu keep up the good work! 



#29 doctorclu OFFLINE  

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Posted Wed Apr 4, 2018 6:28 AM

doctorclu keep up the good work! 

 

Did you get to try out any of the roms?



#30 walter_J64bit OFFLINE  

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Posted Wed Apr 4, 2018 3:58 PM

Not with the new roms.



#31 doctorclu OFFLINE  

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Posted Thu Apr 5, 2018 1:04 PM

Reviewed roms 3 and 4 this morning.   Not much to write home about.  The more recent homebrews and that display mode does not work well at all in VVcs.

 

Did run across Amidar which was SOOOO close.   Displayed right, worked right, and then crashes like five seconds into gameplay.  :P

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  • 20180405_063313.jpg


#32 doctorclu OFFLINE  

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Posted Sat Apr 7, 2018 4:15 PM

Good news everyone. * 

 

I've explored through the 50 rom images and found some interesting results.  The pictures from those can be found in the attached zip file.

 

First off, what for sure doesn't work?    Game created from Atari 2600 Basic.

 

Text Example.jpg Text Example02.jpg

 

Yep just pack it up and go home on those.  I saw a title with the blocky text from that dev format and I said "Nope" and moved onto other images.   After a while you just get a feel for what works and what doesn't.

 

Also notice after a while that balls and ammo shots don't display a lot of the time.   Kinda curious what is being  called where that fails.   There are quite a few games where shots can be seen (like Gorf, Astrosmash, etc) so just depends on what the programmer used at the time.

 

A lot of schemes that try to use some version of text is not a friend to VVcs either.

 

So what did work?   A lot of the displays used in the 70s and 80s, naturally, since that is what was played with when this was being developed.

 

Examples of what did work?

 

Astroblast03.jpg

Astrosmash (Astroblast)

I didn't realize how lucky I got with finding the games in Multi01 pack and the Mario Brothers clone.  So many games did not work.  Astrosmash is FAST.   To Bryan, who programmed the 6507 emulator for the Tom chip and wanted to save cycle times, I can say that some games run a bit too fast.   You'll see this on Astrosmash, Space Battle, Gorf, and Sky Diver.   SLOW is not a problem of VVcs.  :D    This game works quite well, keeps score, but though you start with ten lives you loose all lives when you die.  That life counter is not completely working for some reason.

 

Bank Heist.jpg

Bank Heist is the closest thing to a maze game that actually worked well.  The walls are recognized. though things are little off with alignment to the get-a-way car.  Still this game is a lot of fun on VVcs.

 

Basic Math.jpg

Things like Hangman, Basic Math and other really early games tended to work.  However, if there was any flicker used for small fonts like in Stellar Track, not so much.

 

Boxing-play.jpg

Activision games generally played, but did not display exactly right.   I kinda like how boxing  displayed wrong.  These look almost like Transformer robots going at it.    Maybe call this "Robot boxing"   Hmmm...

 

Cake Walk.jpg Cakewalk01.jpg

Cakewalk is one of those "So close and yet so far" moments.  The gameplay is ALMOST there, all displays fairly well.  But when your character jumps up to grab the cake it just falls right onto the floor.  SOOO CLOSE.  And this is such a fun game.   But I love the nightmare fuel of the "Hell's Baker" on the opening screen.  :D

 

Cathouse-Good.jpg

Cathouse by Playaround software actually works!  :o   Usually the adult games where found to be poorly programmed and hard to emulate, and yet, here this is. 

 

Circus Atari.jpg

Circus Atari displayed amazingly well.  I was surprised all the balloons displayed at the top because so many others, like Gorf, Megmania, and others don't display.   But Circus Atari with the tetter-totter the clowns jump onto is just not quite there and very difficult to rig landing on to.  Yes, I tried a joystick version, just that that displays.

 

Cosmic Swarm-play2.jpg

Cosmic Swarm aside from display lines is playable as an invisible bullet game.

 

 

 

 

 

 

 

* Always loved Farnsworth's way of entering a room with that in Futurama. 

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Edited by doctorclu, Sat Apr 7, 2018 4:19 PM.


#33 doctorclu OFFLINE  

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Posted Sat Apr 7, 2018 5:11 PM

Coins.jpg Lasertime02.jpg Xsqueeker02.jpg McDonalds.jpg

 

Demos did amazingly well all things considered.

 

Fire fighter.jpg Malagai.jpg Amidar.jpg

Fire Fighter, Malagai, and Amidar/Spider Droid... games that play for a few seconds and crash.   There is a lot of trouble with score counters for some reason and Amidar starts with a -0.  Figure as it ticks in some points earned in the game it is counter to what should be be and whammo.  :P  A theory.

 

dragon protector-Good.jpg

Dragon Defender was a bit jittery, but otherwise played, displayed, shot, could be shot, not bad.

 

gopher.jpg Gravedigger.jpg

Gopher and Gravedigger

Well, you have three carrots/graves normally, displays one but is otherwise playable.  Oh, and this is another game where you realize that Bryan's work on saving clock cycles has left PLENTY room to start sacrificing cycles for sound.  This game is also a little bit too fast.  Which is good.  :D

 

Lasercade.jpg

Lasercade is a good invisible Bullet (IB) game.   Plays, just doesn't display the laser.

 

Lock N Chase.jpg

A lot of Mattel games displayed well on Vvcs.  Lock N Chase works, as long as you don't mind two of the cops being invisible.  :D

 

Math Grand Prix.jpg

Displays beautifully.   Now, if only you can guess the question.  Yes, that doesn't display.   Good luck.

 

Mogul Maniac03.jpg Mogul Maniac02.jpg

Mogul Manic, Amiga's only foray into the Atari 2600 gaming, actually works on Vvcs.  :D   Seems to play.  Couldn't get it to go very fast in regular emulation and played about the same on VVcs.

 

Raft rider03.jpg Surround.jpg

Raft Rider/Surround - Displays pretty well, but no hit detection.  There is another form of hit detection that does not work that was not filtered out with the "852C" search in the hex code.  Also happened on Treasure Below as well.

 

Sky diver.jpg

Works!!   Had no doubt actually.   Though I have not landed on the pad successfully for a score.  (Loads it up, tests it)   Yep, that works along with scoring.  AND TWO PLAYER IS SUPPORTED.   I had no plugged up two controllers till that point.

 

Space Chase.jpg

Space Chase, an Apollo IB game.  Otherwise plays fine.

 

Space raid02.jpg

Space Raid (Zaxxon)

Works, IB GAME, when you die game crashes.

 

Tetris2600.jpg G-ZBlocks.jpg

Tetris 2600 and G-Z Blocks are two working Tetris games.  G-Z Blocks being the closet to working the best.  G-Z Blocks also has a two player mode.

 

Toledo_atomchess_6502.jpg

Toledo Atom Chess 6502 was the only Chess/Checkers to display all the pieces somewhat. Too bad you couldn't see the cursor.  :P

 

X-Win Comand01.jpg

X-Wing Commander/Space Battle

This game works!   Saved the best for last.   Displays, plays, the only difference in performance from what I played on the emulator on my laptop was:

1) star displays possibly non-existent.

2) Enemy ships not as enlarged since that display feature is not active?

3) Due to the efficient 6507 emulation, FRANTIC pace.  :D

 

Oh it is challenging.

 

So having found those I'll repackage some multi-roms with the working and mostly working games.  And other fun ideas.  ;)

 

More to come.


Edited by doctorclu, Sat Apr 7, 2018 5:28 PM.


#34 doctorclu OFFLINE  

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Posted Tue Apr 17, 2018 10:00 AM

Screen Shot 2018-04-17 at 10.45.01 AM.png

 

Download here.

 

Gigolo worked when testing for 852c code, and come to find out these adult games were so simple they all at least displayed to a great degree.  Game one the projectiles can still hit you.  Game two all works fairly well with the exception of the scene in the house.  And game three a few things.  The brick you carry does not display, but it is there.  The bird from above can still demolish the bridge, the bridge creature walks through you, but the gator can still get you.  Still pretty fun.

 

 

Games 4 and 5 have the missile display bug, and game 6 uses a more complex display/flicker effect so that does not work much at all.   Game 4 you can still play somewhat, but shots you fire and those at you are not seen.  Game 5 though this paddle game I tried to get a version hacked for joystick, playing without seeing the "missiles" is next to impossible.

 

More soon.

 

PS:  For those curious, Custer's Revenge does display and play.  These packs will feature the more consensual versions of "Westward Ho" and "General Retreat".  :D


Edited by doctorclu, Tue Apr 17, 2018 10:03 AM.


#35 doctorclu OFFLINE  

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Posted Tue Apr 17, 2018 12:04 PM

Decided to add some color to the opening screen for the Women Adult pack and a "not for sale" message.  ;)

 

Screen Shot 2018-04-17 at 12.43.41 PM.png

 

Download here.

 

And adding the Adult Pack 02 featuring men as the main character.

 

Screen Shot 2018-04-17 at 12.58.52 PM.png

 

Download here.


Edited by doctorclu, Tue Apr 17, 2018 12:05 PM.


#36 Fredifredo OFFLINE  

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Posted Wed Apr 18, 2018 12:16 AM

Games working 100% are ?

#37 doctorclu OFFLINE  

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Posted Wed Apr 18, 2018 6:25 AM

Bear in mind, no sound support, so I should start with that.

 

100%?   Probably Sky Diver, Flag Capture, Hangman.

 

95%?   That Mario Brothers 4K game I originally posted.  All but the score works there.

 

90%?   AstroBlast (life counter not working) Space Battle (Star field does not display, objects smaller than usual).  Both play real fast.

 

And there are others.   Never said I'm looking for games that work 100%, but with the current emulator what works now?  

 

Have to say though Space Battle (should be rom 48 option 5 in the pack of 50 games) is not 100% perfect I've gotten in quite a few rounds already of that game.   Vicious fun.


Edited by doctorclu, Wed Apr 18, 2018 6:39 AM.


#38 doctorclu OFFLINE  

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Posted Wed Apr 18, 2018 12:21 PM

Can't say all these games are working 100% right, as usual, but had some good rounds with Basic Math, Hangman, and Flag Capture would make a good two player game if you have a friend over and want to play a Atari 2600 game on the Jaguar.  That and Sky Diver which I'll add to a pack soon.

 

Screen Shot 2018-04-18 at 1.04.15 PM.png

 

Download here.



#39 doctorclu OFFLINE  

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Posted Wed Apr 18, 2018 1:23 PM

Android taking a picture of a iPod that took a picture of an Android emulating a Jaguar emulating a Atari 2600.

 

20180418_141607.jpg

 

These roms as presented won't run on IrataJaguar on Android.  PM me if interested in the adjustment.

 

 



#40 Gemintronic ONLINE  

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Posted Tue Jul 17, 2018 5:46 AM

Hey, doctorclu!

 

I saw a screenshot of my batari BASIC game Balloon Girl.  Apparently it at least got to the title screen.  Any sounds?  Did it get into the main game?  

 

I'm not against re-writing collision routines and adjusting for what works to make a 2600 Jaguar cartridge game.



#41 walter_J64bit OFFLINE  

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Posted Tue Jul 17, 2018 6:02 AM

The VirtualVCS being in the alpha state, there is no sound yet not unless someone takes over what was started.    



#42 doctorclu OFFLINE  

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Posted Fri Aug 3, 2018 8:49 PM

Hey, doctorclu!

 

I saw a screenshot of my batari BASIC game Balloon Girl.  Apparently it at least got to the title screen.  Any sounds?  Did it get into the main game?  

 

I'm not against re-writing collision routines and adjusting for what works to make a 2600 Jaguar cartridge game.

 

That is really nice that you were willing to rewrite the collision routines.   Sadly the title screen shown was on my Mac Stella emulator.  All the Batari Basic games crash on VirtualVCS (that I've seen so far.)

 

Cool to see the interest though.

 

I'm planning on making at least two more game packs.  I was just trying to adjust some of the game images for a better experience.  :D







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