Yar's strike - new game !

[Thelen]

For this years 4K minigame compo I made a little game : Yar's strike. It's a remake from the classic Yar's revenge from the atari 2600.

It features 8 levels before yar is finally safe home....

 

After 6 year's non 6502 programming it was real fun programming this every now and then last two months !

 

The primay objective is to break a path through the shield and destroy Qotile with a blast from the Zorlon cannon. The secondary

objective is to score as many points as possible !

 

For more information, and how to play see the readme file in the .zip file. Boot with basic disabled.

 

 

 

Have fun !

 

Let me know what you think of it !

 

 

Thelen

Yars_strike.zip

[+GroovyBee]

Any pictures of the game running?

[spookt]

Very nice! Just tried it in the emulator. Congrats on a fine release.

 

Here's a screenshot:

 

[Thelen]

pictures :

 

 

 

[+Philsan]

Excellent!

A G2F colorful title screen would be nice.

Edited August 6, 2009 by Philsan

[+Stephen]

For this years 4K minigame compo I made a little game : Yar's strike. It's a remake from the classic Yar's revenge from the atari 2600.

It features 8 levels before yar is finally safe home....

 

After 6 year's non 6502 programming it was real fun programming this every now and then last two months !

 

The primay objective is to break a path through the shield and destroy Qotile with a blast from the Zorlon cannon. The secondary

objective is to score as many points as possible !

 

For more information, and how to play see the readme file in the .zip file. Boot with basic disabled.

 

 

 

Have fun !

 

Let me know what you think of it !

 

 

Thelen

Can't wait to try this out! How much code did you have to change to get this running?

 

Stephen Anderson

[Sikor]

Nice Good job

[Thelen]

Can't wait to try this out! How much code did you have to change to get this running?

 

Stephen Anderson

 

I programmed it from scratch...only ripped out the yar bit pictures from the original

[+Stephen]

Can't wait to try this out! How much code did you have to change to get this running?

 

Stephen Anderson

 

I programmed it from scratch...only ripped out the yar bit pictures from the original

Nice - that's a hardcore way of doing it!

 

Stephen Anderson

[Slor]

Dunno that anyone cares - and by the way, the mini-game looks cool - but it was Yars' Revenge, not Yar's Revenge. Our hero is a Yars. You guys can feel free to flame me now for the anal level of this post.

 

Slor

[+doctorclu]

Dunno that anyone cares - and by the way, the mini-game looks cool - but it was Yars' Revenge, not Yar's Revenge. Our hero is a Yars. You guys can feel free to flame me now for the anal level of this post.

 

Slor

 

How dare you be correct!!!

[+doctorclu]

For this years 4K minigame compo I made a little game : Yar's strike. It's a remake from the classic Yar's revenge from the atari 2600.

It features 8 levels before yar is finally safe home....

 

After 6 year's non 6502 programming it was real fun programming this every now and then last two months !

 

The primay objective is to break a path through the shield and destroy Qotile with a blast from the Zorlon cannon. The secondary

objective is to score as many points as possible !

 

For more information, and how to play see the readme file in the .zip file. Boot with basic disabled.

 

 

 

Have fun !

 

Let me know what you think of it !

 

 

Thelen

 

Nice! Is this primarily 6502 coded?

 

Have any source available?

[PeteD]

After 6 year's non 6502 programming it was real fun programming this every now and then last two months !

 

I know what you mean. I haven't done any 6502 for a looooong time but I'd done so much in the past that I haven't forgotten it (oh, I suppose writing a 6502 emulation a few years back didn't hurt in keeping it in my mind). But now I'm having loads of fun coding again on a machine I've barely touched before

 

 

Pete

[NRV]

Nice game!

 

I always liked the idea of doing some kind of sequel to Yars..

 

 

But now I'm having loads of fun coding again on a machine I've barely touched before

 

Pete

 

muahaha.. you are trapped..

[Thelen]

Dunno that anyone cares - and by the way, the mini-game looks cool - but it was Yars' Revenge, not Yar's Revenge. Our hero is a Yars. You guys can feel free to flame me now for the anal level of this post.

 

Slor

 

I Think our hero is named Yar (that's what he is called like in the 2600 manual)

 

 

Nice! Is this primarily 6502 coded?

 

Have any source available?

 

100% 6502

 

The source code looks like crap

[+Philsan]

Having read the manual I think...

Yar (singular)

Yars (plural)

Yars' (possessive case)

 

Game title is "Yars' Revenge" so I would use "Yars' Strike".

Edited August 7, 2009 by Philsan

[_Fandal_]

Hi!

 

Nice little game! Congratulations!

 

I've just tested it on real HW and I realized that:

 

* there's no INI or RUN block = possible problem

* Pokey isn't properly initialized = two channels are playing wrong on real HW

* one block is being loaded under OS ($C134-$C15B)

 

F.

[Thelen]

Thanks for all the warm comments !

 

* there's no INI or RUN block = possible problem

* Pokey isn't properly initialized = two channels are playing wrong on real HW

* one block is being loaded under OS ($C134-$C15B)

 

Thanks Fandal for finding those things !

 

*1 never used it before, but will it be important if the game will be loaded from a dos ?

Is it enough to put in 2E0-2E1 $2000 where the game code starts ?

 

*2 This was my first time ever doing some pokey sounds ..The only thing i do is

sta $00 in AUDCTL to intialize it, what should i change to intialize it the right way ?

Funny fact is, that by testing on the wiixl(atari800) emulator the sound screwed up,

and with atari800win it seemed allright. I tested it also on real hardware (65XE) and it worked properly. Strange !

 

 

*3 as far as i can see, there are no ORG's in $C*** or code leaking in this area, probably i'm missing something..

 

 

As soon as i know how to put things right I will upload the fixed versionn

Edited August 7, 2009 by Thelen

[_Fandal_]

Thanks for all the warm comments !

 

* there's no INI or RUN block = possible problem

* Pokey isn't properly initialized = two channels are playing wrong on real HW

* one block is being loaded under OS ($C134-$C15B)

 

Thanks Fandal for trying it out !

 

*1 never used it before, but will it be important if the game will be loaded from a dos ?

Is it enough to put in 2E0-2E1 $2000 where the game code starts ?

 

It's recommended to use RUN or INI block. Some loaders might have a problem loading a binary without RUN/INI block. 2E0-2E1 $2000 is fine enough.

 

*2 This was my first time ever doing some pokey sounds ..The only thing i do is

sta $00 in AUDCTL to intialize it, what should i change to intialize it the right way ?

Funny fact is, that by testing on the wiixl(atari800) emulator the sound screwed up,

and with atari800win it seemed allright. I tested it also on real hardware 65XE and it worked properly. Strange !

 

Use this code to initialize Pokey:

LDA #$00

STA $D208 ; AUDCTL

LDA #$03

STA $D20F ; SKCTL

 

*3 as far as i can see, there are no ORG's in $C*** or code leaking in this area, probably i'm missing something..

 

 

As soon as i know how to put things right I will upload the fixed versionn

 

Here is complete structure of your binary:

 

$2000-$2C07 ($0C08)

$9C00-$9C1F ($0020)

$9D00-$9E0D ($010E)

$A000-$A058 ($0059)

$B40B-$B41C ($0012)

$B42C-$B437 ($000C)

$B4DC-$B503 ($0028)

$B5B0-$B5B8 ($0009)

$C134-$C15B ($0028) ; ???

$B793-$B79B ($0009)

$B89D-$B8A1 ($0005)

$B8C5-$B8CA ($0006)

$B8ED-$B8F1 ($0005)

 

F.

[Slor]

Having read the manual I think...

Yar (singular)

Yars (plural)

Yars' (possessive case)

 

Game title is "Yars' Revenge" so I would use "Yars' Strike".

 

I think you got me on that one, and I agree with both of you. The possessive Yars' indicating that it's the revenge of the whole colony of Yars, not just a single Yar. I stand corrected (at least half ).

 

Slor

[Thelen]

Now the last little bugs are fixed

Yars_strike.zip

Edited August 9, 2009 by Thelen

[CrazyChris]

Atari 5200 conversion???

 

How many want a 5200 version of Yar's Revenge?

[Bikerbob]

psssst .. Dude, Yars' Revenge is the original, Yars' Strike is the new one that Thelen made

 

James

[BIGHMW]

We're still waiting for a 5200 port of this classic, make it happen!!!

 

Here is the 8-bit port we 5200 owners are waiting to have for our systems!!!

 

Even if you can't put it onto a physical cartridge a ROM or .bin port will do us just fine, as long as it will work on the 5200!!!

 

[BIGHMW]

IT'S FINALLY HERE!!!

 

A 5200 version is here for you 5200 owners to download and try out, you can thank @playsoft for converting this great classic, just 4 years after I first saw the original 8-bit version on this topic that @Thelen created way back in 2009. It's an awesome (and tough) game to play but yes after 4 years after I called for a 5200 port Big Sexy finally has one of her own!!!

 

Here's the ROM for all of you!!!

 

 

Yar's Strike.bin