ComputerSpaceFan Posted October 1, 2017 Share Posted October 1, 2017 I just discovered this awesome version of River Raid on iTunes which has a unique version called Fantasy mode (skip to the 7:40 mark to see it). I was wondering can such a mod be done to the original River Raid ROM so this version is playable on original hardware? It's tons of fun! https://www.youtube.com/watch?v=8S8flHTy8wc 4 Quote Link to comment Share on other sites More sharing options...
SoundGammon Posted October 1, 2017 Share Posted October 1, 2017 (edited) Like it! How about River Raid with power ups like Raiden? Edited October 1, 2017 by SoundGammon 2 Quote Link to comment Share on other sites More sharing options...
Keatah Posted October 2, 2017 Share Posted October 2, 2017 I'm not a programmer, but I've seen enough VCS games to say, "Sure! Why not?" 2 Quote Link to comment Share on other sites More sharing options...
Nukey Shay Posted October 2, 2017 Share Posted October 2, 2017 Yes...flicker the player's missile at 20hz. If all 3 missiles are to disappear when any one of them has hit something, such a hack wouldn't even require additional resources (though there are a couple of bytes of ram unused in the original game). 6 Quote Link to comment Share on other sites More sharing options...
CDS Games Posted October 2, 2017 Share Posted October 2, 2017 Bankswitching per each missile, you mean? That hack's starting to close in on 1943. Quote Link to comment Share on other sites More sharing options...
+sramirez2008 Posted October 4, 2017 Share Posted October 4, 2017 Yes...flicker the player's missile at 20hz. If all 3 missiles are to disappear when any one of them has hit something, such a hack wouldn't even require additional resources (though there are a couple of bytes of ram unused in the original game). Ohh baby! Quote Link to comment Share on other sites More sharing options...
Nukey Shay Posted October 4, 2017 Share Posted October 4, 2017 Not bankswitching...just drawing the missile at skewed positions for 2 frames. Example: ; x-position missile: INX ; 2 ;; LDA missileX ; 3 LDA frameCnt ; 3 LSR ; 2 AND #$01 ; 2 BCC Straight ; 2 BEQ NoLeft ; 2 CLC ; 2 ADC zero2 ; 3 .byte $2C ; 4 NoLeft: SBC zero2 ; 3 Straight: CLC ; 2 ADC missileX ; 3 .skipJet0: ;; LDX zero2 ; 3 load 0 with exactly 3 cycles LDX zero1 ; 3 changed variable ; *** move or fire missiles: *** LDA missileFlag ; 3 BPL .noMissile ; 2 ;added line INC zero2 ; 5 Quote Link to comment Share on other sites More sharing options...
Nukey Shay Posted October 4, 2017 Share Posted October 4, 2017 .checkFire: LDX player ; 3 LDA INPT4,X ; 4 BMI .noMissile ; 2 ;added lines LDX #$00 ; 2 STX zero2 ; 3 Quote Link to comment Share on other sites More sharing options...
Nukey Shay Posted October 4, 2017 Share Posted October 4, 2017 (Changes listed done to TZ's disassembly) It's a little rough, but it works. Quote Link to comment Share on other sites More sharing options...
Nukey Shay Posted October 5, 2017 Share Posted October 5, 2017 Damn...it's difficult to find some space here. !!!!!! game killer removed. Supercharger-compatable. RiverRaid(Fantasy_Mode).bin 11 Quote Link to comment Share on other sites More sharing options...
+sramirez2008 Posted October 5, 2017 Share Posted October 5, 2017 Damn...it's difficult to find some space here. !!!!!! game killer removed. Supercharger-compatable. Thank you! Quote Link to comment Share on other sites More sharing options...
+Random Terrain Posted October 5, 2017 Share Posted October 5, 2017 Damn...it's difficult to find some space here. !!!!!! game killer removed. Supercharger-compatable. I wonder if the 3 shots could be added to any of these hacks: atariage.com/forums/topic/220544-river-raid-turbo-wrandom-start-and-other-river-raid-hacks/ Quote Link to comment Share on other sites More sharing options...
Nerf Herder73 Posted October 5, 2017 Share Posted October 5, 2017 This is kind of fun! Wait! Did I just blow up a house? Was this always part of the game? Quote Link to comment Share on other sites More sharing options...
Nukey Shay Posted October 6, 2017 Share Posted October 6, 2017 Not really. Although the score table is set up to record zero points for hitting a house, the chances of doing so are n/a (a missile would hit the playfield before it reaches a house). Flickering the missile means that they can reach farther inland than normal. On that subject, I fixed the flicker for 20hz (the binary above does the center missile twice in 2 frames). Now each one only appears once in 3 frames. The !!!!!! freeze is back in place, too. RiverRaid(Fantasy_Mode_V2).bin 6 Quote Link to comment Share on other sites More sharing options...
SoundGammon Posted October 6, 2017 Share Posted October 6, 2017 Anyone want to hack the 5200 version? It needs it for sure! Quote Link to comment Share on other sites More sharing options...
ComputerSpaceFan Posted October 7, 2017 Author Share Posted October 7, 2017 Once again Nukey Shay proves he is a God walking amoung us mere mortals. 1 Quote Link to comment Share on other sites More sharing options...
Nukey Shay Posted October 13, 2017 Share Posted October 13, 2017 Working on a smoother version that uses 30hz flicker of the other missile sprite for the side shots (and leaves the center shot unflickered)...but I ran into a slight problem where roads are (M1 would be doubled on roads). May not be a big issue, since the bridge is the only thing hittable on those scanlines...but it would mean that the side shots could not be cancelled when hitting PF (or it would become impossible to shoot through an empty bridge area - the doubled side shot would always hit PF). Possible workaround using the ball sprite instead, but its dark green color does not show up all that well onscreen (plus, it would become necessary to reposition the ball before displaying the fuel gauge). Quote Link to comment Share on other sites More sharing options...
Nukey Shay Posted October 13, 2017 Share Posted October 13, 2017 Got most of it ironed out...may get a stray duplicate missile just below a road, tho. Here's that test (attract & BW code removed). This name already taken? RiverRaid3.bin 6 Quote Link to comment Share on other sites More sharing options...
Arenafoot Posted October 17, 2017 Share Posted October 17, 2017 Got most of it ironed out...may get a stray duplicate missile just below a road, tho. Here's that test (attract & BW code removed). This name already taken? Awesome work Nukey! You amaze us once again! 1 Quote Link to comment Share on other sites More sharing options...
Keatah Posted October 17, 2017 Share Posted October 17, 2017 What a nice hack packed with value. It's much easier to fly full speed and blow everything up. While that may sound likes it's now too easy, it isn't. Remember the fuel tanks are more easily destroyed too. And then you need to slow down, change strategy momentarily to successfully refuel. With all these hacks and stuff It's like getting new game options on our 40-year old games. Or think of it as firmware updates and upgrades.. heh! 4 Quote Link to comment Share on other sites More sharing options...
KevinMos3 Posted October 17, 2017 Share Posted October 17, 2017 Got most of it ironed out...may get a stray duplicate missile just below a road, tho. Here's that test (attract & BW code removed). This name already taken? Very cool hack. Totally renews the game. Can the color cycling playfield be added as an option as well? Is that something you're already working on, or is there not enough CPU cycles? 1 Quote Link to comment Share on other sites More sharing options...
Nukey Shay Posted October 17, 2017 Share Posted October 17, 2017 Cycles are a non-issue for the playfield...it can be set to a new color offscreen...but what is it based on here? Wouldn't a bridge counter be better? Quote Link to comment Share on other sites More sharing options...
KevinMos3 Posted October 20, 2017 Share Posted October 20, 2017 Cycles are a non-issue for the playfield...it can be set to a new color offscreen...but what is it based on here? Wouldn't a bridge counter be better? For practical purposes, probably. But I'm referring to the constant color cycling (every couple seconds) of the Fantasy mode shown in the video. No reason for it, except awesome flare -- perhaps toggled via the Color/BW switch or a difficulty switch for those who are sensitive to the color changes or just don't like it. Quote Link to comment Share on other sites More sharing options...
Rodrigo Posted October 20, 2017 Share Posted October 20, 2017 Congratulations, I loved it! Quote Link to comment Share on other sites More sharing options...
NE146 Posted October 20, 2017 Share Posted October 20, 2017 Nukey is A#1 2 Quote Link to comment Share on other sites More sharing options...
Like us on Facebook
Follow us on Twitter
AtariAge on Instagram
Watch us on YouTube
Chat on Discord
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.