Krzysiek at 12:32, 21 December 2014

2014-12-21T12:32:28Z

Krzysiek at 22:09, 15 December 2014

2014-12-15T22:09:48Z

Krzysiek: Created page with " /* * Tutorial 02 - using data * * */ // RAM variables var anim = 0x80; var tmp = 0x81; // "data" - declare byte data block data raster_data { 0 0xD0 0x..."

2014-12-11T12:00:52Z

Created page with "<source lang="c"> ‎* Tutorial 02 - using data * *: // RAM variables var anim = 0x80; var tmp = 0x81; // "data" - declare byte data block data raster_data { 0 0xD0 0x..."

New page

<source lang="c">
/*
* Tutorial 02 - using data
*
*
*/

// RAM variables
var anim = 0x80;
var tmp = 0x81;

// "data" - declare byte data block
data raster_data {
0
0xD0 0xD2 0xD4 0xD6 0xD8 0xDA 0xDC
0xDE 0xDC 0xDA 0xD8 0xD6 0xD4 0xD2 0xD0
}

data sine_table {
align 256 // this guarantees block starts on address divisible by 256

// this generates precomputed sine table from the formula
for x=0..255 eval [ (sin(x/128*pi*2)*.499+.499)*178+1 ]
}

// "inline" - this code is inlined when it's called
inline raster_bar {
x=15
{
wsync
a=raster_data,x
cbg=a
x--
}!=
cbg=a=0
}

// entry point block is declared with "main"
main {
init
{
sync1
sync2
sync3

// draw top bar
raster_bar

// tmp - count total empty lines
tmp=a=180

// read sine table and wait as much scanlines
x=anim
y=sine_table,x
{
wsync
tmp--
y--
}!=

// draw animated bar
raster_bar

// wait remaining lines
{
wsync
tmp--
}!=

// draw bottom bar
raster_bar

anim++
} always // loop forever
}
</source>

@@ Line 1: / Line 1: @@
 [[Category:K65]]
 <source lang="c">
 /*

← Older revision		Revision as of 22:09, 15 December 2014
Line 1:		Line 1:
		+	[[Category:K65]]
	<source lang="c">		<source lang="c">
	/*		/*

K65 Tutorial 2 - Revision history

Krzysiek at 12:32, 21 December 2014

Krzysiek at 22:09, 15 December 2014

Krzysiek: Created page with " /* * Tutorial 02 - using data * * */ // RAM variables var anim = 0x80; var tmp = 0x81; // "data" - declare byte data block data raster_data { 0 0xD0 0x..."