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The Battle of Midway v0.15


TROGDOR

1,648 views

tbom157go.png

 

 

Features:

tbom14.asm

- Added Akagi aircraft carrier. The left difficulty switch determines which ship is displayed. A=Yamato B=Akagi. Press reset to see the selected ship.

- Fixed bomb loop error. When the bomb is droped, an offset is added to the X position. On the right side of the screen, this can result in a value larger than 160. I was checking for X=160 to wrap. Now I'm checking for X>=160.

- Multiplexed machinegun fire in with explosion sounds.

- Added shorter and higher pitched explosion for plane impact.

- Added moveable object collision detection.

- Added player plane crash routine when the player collides with the enemy plane or AA fire.

- Added splash sound when bomb lands in the ocean.

 

tbom15.asm

- Added title music. :D

- Started using the random number engine. The ship's AA fire now fires from a random location on the ship.

 

Known Issues:

- There's an HMOVE bar in the upper left side of the screen. It's coming from the horizontal positioning code. I need to move this up higher in the vblank.

- The title music mode is preliminary. If you drop a bomb in the middle of the music, it will stop the music. When the game is finished, you won't be able to control the plane during attract mode, which is when the music plays.

 

Todo:

Add the aircraft carrier Akagi.

Add sprite collisions (missle to plane, plane to plane, bomb to plane)

Add shot down plane effects.

- Add score display

- Add replicated sprites for enemy plane squadrons.

 

Development Notes:

The title music is an adaptation of the title music from the movie Patton. General Patton was not involved in the battle of Midway. I just like the music. ;)

 

I spent an unusually long time working on the splash sound. I'm still not happy with it. The Atari white noise generator has a flange that doesn't sound right for a splash sound effect. If anyone as a suggestion for a better sound, I'm all ears.

17 Comments


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Have a listen to the splash effect in Go Fish! - if you like that, I'll tell you what I did there. The splash sound plays when you start a game. I had similar issues with the flange effect; I was never really satisfied.

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Hi Bob,

 

Go Fish! is a great game! I hadn't played it before. Very impressive, especially the effects on the title screen. Is there an online manual for the game? I'm trying to figure out if I can eat those eels. :)

 

Shark! Shark! ranks in my top 10 of favorite classic console games.

 

How's this for a screenshot?

 

anothershark2ic.jpg

 

I met this friendly shark on a Bahamas scuba trip in 2003. :lol:

 

I listened to the splash in Go Fish! with the music turned off, and unfortunately it still has a noticable flange. So I'll keep my current splash, but thanks for the offer. I'm using a creshendo / decreshendo from 0 to 7 and back down, with a frequency of 1. This seems to minimize the flange effect.

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Hi Bob,

 

Go Fish! is a great game! I hadn't played it before. Very impressive, especially the effects on the title screen. Is there an online manual for the game? I'm trying to figure out if I can eat those eels. :lol:

Thanks, though I can't take credit for the title screen effect; I stole/borrowed that from Alex Herbert (of Man Goes Down fame :)).

 

I don't think there is a manual online anywhere...here's a quick rundown:

 

Eat the fish that are your size or smaller. The eels, sharks, and jellyfish are always deadly. :)

I listened to the splash in Go Fish! with the music turned off, and unfortunately it still has a noticable flange. So I'll keep my current splash, but thanks for the offer. I'm using a creshendo / decreshendo from 0 to 7 and back down, with a frequency of 1. This seems to minimize the flange effect.

Yeah, after I posted I went back and listened myself and it does still have that flange - I guess I never did figure out a way to get rid of that.

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Talking 'bout Go Fish, did you notice that it is already #11 of the bestseller list? :lol:

Where'd you see that? I hadn't noticed. And, actually, when I went to look, it's at #9. :)

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Talking 'bout Go Fish, did you notice that it is already #11 of the bestseller list? :)
Where'd you see that? I hadn't noticed. And, actually, when I went to look, it's at #9. :lol:

 

You gave the answer yourself already :)

 

(As soon as Seawolf and Fall Down return to the store, this one goes (back) to eleven :))

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vgwiz is out of stock for the blue cartridges and they're most likely not producing another run (unless someone wants to order 2.000 at once :lol:), so Al is currently revamping the pages displaying black versions of both games.

(A positive side effect will be a price drop for Seawolf to $20.- so it ain't all bad :))

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Yeah, I found out about the blue carts a few days ago when I spent my store credit from the Rainbow Invaders contest. My Cat Trax cart is going to have to be clear, instead of blue.

 

I blame Seawolf. :)

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Seawolf approximately used only 1/3 of the original blue production run of 500. So I blame all the freeloaders for wasting them away with their lower purposes :)

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Yeah, I too just saw that (Two Tigers) posted up on different thread. It may indeed have a certain Twin Tigers look/feel to it, although I've never played Twin Tigers. Looks cool.

 

TWO TIGERS

 

Like the other guy said, maybe with driving controllers...

 

 

edit: typos.

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Yep, you've found me out. The main inspiration for this game is Two Tigers. I put many hours (and quarters) into that game back in the arcade days.

 

Unfortunately there won't be a two player version of this game, at least not with both players bombing the ship. 2 player sprites + 2 bombs + 4 shots + enemy sprites = bad flicker. I have been considering the posibility of a two player game where the second player controls the ememy planes or the AA fire. But I need to get the one player version done first. :D

 

Using driving controllers sounds interesting, but it likely won't happen. Very few people own the original driving controllers, and neither do I.

 

Anyone with MAME should try the arcade version. (Assuming that you own the original arcade game and have legal access to the ROMs. :D)

 

FYI, Twin Tigers was a top-down helicopter scroller, of a different vein.

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Using driving controllers sounds interesting, but it likely won't happen. Very few people own the original driving controllers, and neither do I.

 

Ugh! Lame! Get a set!

 

Rob Mitchell, Atlanta, GA

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