source: thomson/code/C/meatracker/main.c@ 90b6d4b

/* MEA Tracker
 * Copyright 2013, Adrien Destugues <pulkomandy@pulkomandy.tk>
 *
 * This file is distributed under the terms of the MIT licence.
 */

#include "display.h"
#include "input.h"

volatile unsigned char* MEA_DATA = (unsigned char*)0xA7CE;
extern unsigned char music[8][16];

uint8_t isplaying = 1;

int main(void)
{
        asm(" ORCC #$50"); // Disable interrupts (cursor blink)
        refreshchannels();


        for(int frame = 0;;frame++)
        {
                if((frame & 0x3) == 0)
                        input();
                
                if(isplaying)
                {
                        /*
                        *MEA_DATA = music[0][frame & 0xF];
                        *MEA_DATA = music[1][frame & 0xF];
                        *MEA_DATA = music[2][frame & 0xF];
                        *MEA_DATA = music[3][frame & 0xF];
                        */

                        *(MEA_DATA + 1) = 0x12;
                        *MEA_DATA = 110;

                        // BW
                        *MEA_DATA = (music[1][frame & 0xF] << 6) |
                                                (music[3][frame & 0xF] << 4) |
                                                (music[5][frame & 0xF] << 2) |
                                                (music[7][frame & 0xF]);

                        // FREQ
                        *MEA_DATA = (music[2][frame & 0xF] << 5) |
                                                (music[4][frame & 0xF]);

                        // FREQ / AMPL
                        *MEA_DATA = (music[0][frame & 0xF] << 3) | 0xF; // TODO AMPL

                        // AMPL / DUR / PERIODCHANGE
                        *MEA_DATA = 0xD1; // TODO AMPL / DUR / PERIODCHANGE
                }

                asm("\n"
"z      TST     0xA7E7  \n"
"       BMI z           \n"
"bb     TST     0xA7E7  \n"
"       BPL bb          \n"
                );
        }

        return 0;
}