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8bitworkshop/presets/nes/neslib1.c
2019-02-26 22:00:10 -05:00

35 lines
862 B
C

#include "neslib.h"
#include <string.h>
// link the pattern table into CHR ROM
//#link "chr_generic.s"
// function to write a string into the name table
// adr = start address in name table
// str = pointer to string
void put_str(unsigned int adr, const char *str) {
vram_adr(adr); // set PPU read/write address
vram_write(str, strlen(str)); // write bytes to PPU
}
// main function, run after console reset
void main(void) {
// set palette colors
pal_col(1,0x04);
pal_col(2,0x20);
pal_col(3,0x30);
// write text to name table
put_str(NTADR_A(2,2),"HELLO, WORLD!");
put_str(NTADR_A(2,4),"THIS CODE PRINTS SOME TEXT");
put_str(NTADR_A(2,5),"USING ASCII-ENCODED CHARACTER");
put_str(NTADR_A(2,6),"SET WITH CAPITAL LETTERS ONLY");
// enable PPU rendering (turn on screen)
ppu_on_all();
// infinite loop
while (1) ;
}