mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-12-01 13:50:30 +00:00
52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
/*
|
|
Setting the attribute table, which controls palette selection
|
|
for the nametable. We copy it from an array in ROM to video RAM.
|
|
*/
|
|
#include "neslib.h"
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
|
|
// link the pattern table into CHR ROM
|
|
//#link "chr_generic.s"
|
|
|
|
// attribute table in PRG ROM
|
|
const char ATTRIBUTE_TABLE[0x40] = {
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // rows 0-3
|
|
0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, // rows 4-7
|
|
0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, // rows 8-11
|
|
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, // rows 12-15
|
|
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, // rows 16-19
|
|
0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, // rows 20-23
|
|
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, // rows 24-27
|
|
0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f // rows 28-29
|
|
};
|
|
|
|
/*{pal:"nes",layout:"nes"}*/
|
|
const char PALETTE[16] = {
|
|
0x03, // screen color
|
|
|
|
0x11,0x30,0x27,0x0, // background palette 0
|
|
0x1c,0x20,0x2c,0x0, // background palette 1
|
|
0x00,0x10,0x20,0x0, // background palette 2
|
|
0x06,0x16,0x26 // background palette 3
|
|
};
|
|
|
|
// main function, run after console reset
|
|
void main(void) {
|
|
// set background palette colors
|
|
pal_bg(PALETTE);
|
|
|
|
// fill nametable with diamonds
|
|
vram_adr(NAMETABLE_A); // start address ($2000)
|
|
vram_fill(0x16, 32*30); // fill nametable (960 bytes)
|
|
|
|
// copy attribute table from PRG ROM to VRAM
|
|
vram_write(ATTRIBUTE_TABLE, sizeof(ATTRIBUTE_TABLE));
|
|
|
|
// enable PPU rendering (turn on screen)
|
|
ppu_on_all();
|
|
|
|
// infinite loop
|
|
while (1) { }
|
|
}
|