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Slang Test   [2012]

Slang Test Released by :
Vulture Design [web]

Release Date :
30 June 2012

Type :
C64 1K Intro

Released At :
Silesia Party 6

Achievements :
C64 4K Intro Competition at Silesia Party 6 :  #1

User rating:awaiting 8 votes (7 left)   See votestatistics

Credits :
Code .... Raf of HVSC Crew, Vulture Design

Download :

Look for downloads on external sites:
 Pokefinder.org


Production Info
Submitted by Raf on 1 July 2012
It was written in SLANG language:

* do 0
* = $0801 ;set assemble address

da $080b;link
da 0 ;line number
dfb $9e ;sys
txt '2061'
dfb 00,00,00
* fin

byte sinus(40) = [-1 24 48 70 90 106 117 125 127 125 117 106 90 70 48 24 -1 -25 -49 -71 -91 -107 -118 -126 -128 -126 -118 -107 -91 -71 -49 -25 -1 24 48 70 90 106 117 125]

ubyte x,y,innerp,sinpos
uint yy
int innerprod,tmp
byte dx,dy

ubyte border@$d020
byte screen(25,40)@$d800

disableinterrupts

fillmem($0400,$07f0,160)

sinpos = 0
ubyte SINLEN = 32
tmp = 0
innerprod = 0

repeat
dy = sinus(sinpos)
dx = sinus(sinpos+2) ; (SINLEN/16) = 2

y=13
repeat
y = y -1
x=20
repeat
x = x -1
innerprod = innerprod + dx

innerp=(innerprod>>8) and 15
screen(y,x)=innerp
screen(24-y,x)=innerp
screen(y,39-x)=innerp
screen(24-y,39-x)=innerp

;poke border,innerp
until (x=0)

tmp = tmp - dy
innerprod = tmp
until (y=0)

sinpos = sinpos + 1
sinpos = sinpos and 31 ; SINLEN - 1

forever

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