FAQ  •  Register  •  Login

New game: Earthraid

Moderator: nitrofurano

<<

LCD

Posts: 596

Joined: Fri Feb 13, 2009 3:11 pm

Location: Vienna, Austria

Post Sat May 26, 2012 7:09 pm

New game: Earthraid

Earthraid.png
Earthraid.png (3.03 KiB) Viewed 3621 times

Cooming soon: "EARTHRAID". This is a game published in 1986 for the Commodore C64. I made a Spectrum conversion of it. Its allready finished, but waiting now for a soundtrack.
Last edited by LCD on Mon May 28, 2012 4:13 am, edited 1 time in total.
------------------------------------------------------------
http://lcd-one.da.ru redirector is dead
Visit my http://members.inode.at/838331/index.html home page!
<<

boriel

Site Admin

Posts: 1463

Joined: Wed Nov 01, 2006 6:18 pm

Location: Santa Cruz de Tenerife, Spain

Post Sat May 26, 2012 7:23 pm

Re: New game: Earthraid

And you did it in ZX BASIC??? :shock:
Awesome!
<<

LCD

Posts: 596

Joined: Fri Feb 13, 2009 3:11 pm

Location: Vienna, Austria

Post Sun May 27, 2012 6:44 am

Re: New game: Earthraid

boriel wrote:And you did it in ZX BASIC??? :shock:
Awesome!

Yes, it is done in ZX BASIC. The Water-Animation is slower than on C64, but C64 has a character-based display where if you change a font character, it is instantly updated on the entire screen. Spectrum has a bitmapped display, so the updates must be written everytime to all animated cells. But it the game is still excellently playable. Surely I could do it faster, but I think, the current speed is fully okay for a compiled ZX BASIC program and will cause some "Wow's!" on WOS ;). The Grow of Molusks (The invaders) is also slower than on C64, but this is a turn-based game.
I hope to get the music within 1 week.
------------------------------------------------------------
http://lcd-one.da.ru redirector is dead
Visit my http://members.inode.at/838331/index.html home page!
<<

JBGV

Posts: 65

Joined: Wed Feb 16, 2011 6:12 am

Post Sun May 27, 2012 9:32 pm

Re: New game: Earthraid

It seems a very good job.

We hope to play it soon ¡¡
<<

LCD

Posts: 596

Joined: Fri Feb 13, 2009 3:11 pm

Location: Vienna, Austria

Post Mon May 28, 2012 4:21 am

Re: New game: Earthraid

JBGV wrote:It seems a very good job.

We hope to play it soon ¡¡

This is the original C64 version (available only in german): http://www.gametronik.com/site/fiche/co ... Earthraid/
My version is in english, has some additions like build-in instruction, missile visualisation, nice font, etc.
Expect it this week.
------------------------------------------------------------
http://lcd-one.da.ru redirector is dead
Visit my http://members.inode.at/838331/index.html home page!
<<

slenkar

Posts: 282

Joined: Sun Feb 13, 2011 3:33 am

Location: Kentucky US, used to be Birmingham UK

Post Mon May 28, 2012 3:56 pm

Re: New game: Earthraid

looks very interesting
<<

LCD

Posts: 596

Joined: Fri Feb 13, 2009 3:11 pm

Location: Vienna, Austria

Post Wed May 30, 2012 7:26 pm

Re: New game: Earthraid

Update: Game available from my homepage.
------------------------------------------------------------
http://lcd-one.da.ru redirector is dead
Visit my http://members.inode.at/838331/index.html home page!
<<

JBGV

Posts: 65

Joined: Wed Feb 16, 2011 6:12 am

Post Wed May 30, 2012 9:45 pm

Re: New game: Earthraid

Where?

I can´t find it :oops:

This type of games I've always liked
<<

LCD

Posts: 596

Joined: Fri Feb 13, 2009 3:11 pm

Location: Vienna, Austria

Post Wed May 30, 2012 9:57 pm

Re: New game: Earthraid

JBGV wrote:Where?

I can´t find it :oops:

This type of games I've always liked

Go to the ZX Spectrum section of my homepage and click on the screenshoot. I hope you will like the game. For the sound effects I used BeepFX. 128K soundtrack was caned because the game uses all available ressources and this distrubed the interrupt routine too much.
Here is the direct link: http://members.inode.at/838331/zx/Earthraid.zip
------------------------------------------------------------
http://lcd-one.da.ru redirector is dead
Visit my http://members.inode.at/838331/index.html home page!
<<

slenkar

Posts: 282

Joined: Sun Feb 13, 2011 3:33 am

Location: Kentucky US, used to be Birmingham UK

Post Wed May 30, 2012 11:24 pm

Re: New game: Earthraid

nice little game, I was able to do level 1 easily but maybe the others will offer more challenge
<<

JBGV

Posts: 65

Joined: Wed Feb 16, 2011 6:12 am

Post Thu May 31, 2012 7:11 am

Re: New game: Earthraid

How do you do the water effect??!! :D

Awesome ¡¡
<<

LCD

Posts: 596

Joined: Fri Feb 13, 2009 3:11 pm

Location: Vienna, Austria

Post Thu May 31, 2012 7:17 am

Re: New game: Earthraid

slenkar wrote:nice little game, I was able to do level 1 easily but maybe the others will offer more challenge

It is a almost 1:1 conversion from C64. The game plays exactly equal as on C64. The difference between levels is following:
For each level the mollusks lifetime is increased by two rounds, you must wait two rounds longer for a missile and there is less water.
Its not a question of winning, but the question of score.
By the way, I noticed that BeepFX crashes in ZXBC if is called inside a SUB:
  Code:
Sub BeepFX(effect as ubyte)
  poke 60001,effect
  asm
    call 60000
  end asm
end sub

Outside subs it works fine.
On C64 the game took 4 kb by the way, but coded in pure assembler, on hardware that has character based display and sprites and SID. I had to use many tricks to make the conversion working, and these use much memory. Anyway, I'm happy with this conversion.
------------------------------------------------------------
http://lcd-one.da.ru redirector is dead
Visit my http://members.inode.at/838331/index.html home page!
<<

boriel

Site Admin

Posts: 1463

Joined: Wed Nov 01, 2006 6:18 pm

Location: Santa Cruz de Tenerife, Spain

Post Thu May 31, 2012 7:20 am

Re: New game: Earthraid

JBGV wrote:How do you do the water effect??!! :D

Awesome ¡¡

I was wondering the same! :P
<<

LCD

Posts: 596

Joined: Fri Feb 13, 2009 3:11 pm

Location: Vienna, Austria

Post Thu May 31, 2012 7:30 am

Re: New game: Earthraid

JBGV wrote:How do you do the water effect??!! :D

Awesome ¡¡

boriel wrote:I was wondering the same! :P


I used Britlions Putchars and two counters for animation frames: one for water (8 frames) and one for mollusks (4 frames), then scanned the playfield. Everytime a water or mollusk was detected, the tile was redrawn with new frame of animation. There was also a sup which redraws on a mask, to not let the helicopter or missile flicker over mollusks or water, as Spectrum has no sprites. I also though about a possibility to use a second screen to eliminate any flickering and tearing, but I wanted to make the game playable on Spectrum 48K.
So for the speed of graphics I credit Britlions PutChars routine.
I hope to show with this game on WOS how fantastic ZXBC is, and get more users who will use it. And to demonstrate the speed of development I released two games at same time.
------------------------------------------------------------
http://lcd-one.da.ru redirector is dead
Visit my http://members.inode.at/838331/index.html home page!
<<

LCD

Posts: 596

Joined: Fri Feb 13, 2009 3:11 pm

Location: Vienna, Austria

Post Thu May 31, 2012 9:28 am

Re: New game: Earthraid

boriel wrote:
JBGV wrote:How do you do the water effect??!! :D

Awesome ¡¡

I was wondering the same! :P


I will upload the sources pack later.
------------------------------------------------------------
http://lcd-one.da.ru redirector is dead
Visit my http://members.inode.at/838331/index.html home page!
Next

Return to Gallery

Who is online

Users browsing this forum: No registered users and 2 guests

cron
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group.
Designed by Vjacheslav Trushkin for Free Forums/DivisionCore.

phpBB SEO