Commander X16

Code: Select all

/*****************Main Program Start*********************************/
void main(void){
  Init_IRQ();
  x = 0; y = 0; z = 0;
  counter1 = 0; counter2 = 0; counter3 = 0;
  Init_Memory_A();

  keys = 0;
  while (keys == 0){

    while (vsync_set == 0){
      counter2++;
    }
    vsync_set = 0;
    counter1++;
    Read_Joystick(0);
    Read_Joystick(0);
    Read_Joystick(1);
    Read_Joystick(2);
  }
  Restore_IRQ();
}

void Read_Joystick(unsigned char stick){
  temp = stick;
  
  __asm__ ("lda %v",temp); // load a with joystick #
  __asm__ ("jsr %w",JOYSTICK_GET);

  __asm__ ("sta %v",joy_keys0);
  __asm__ ("stx %v",joy_keys1);
  __asm__ ("sty %v",joy_present);

  if (joy_present != 0xFF){
    if ((joy_keys0 & 0x20) == 0){keys = 1;}
    //if (joy_keys0 != 0xFF){keys = 1;}
  }

  //mouse test
  __asm__ ("ldx #$22");
  __asm__ ("jsr %w",MOUSE_GET);
  __asm__ ("sta %v",temp);
  if ((temp & 1) == 1){keys = 1;}
}
/*****************End Main Program********************************/

Code: Select all

#include <cx16.h>
#include <conio.h>

#define JOYSTICK_GET 0xFF56

// From irq.s
extern unsigned char VBlankCnt;

static unsigned char temp, count, joyA, joyB, joyC;

void Read_Joystick(unsigned char stick){
    temp = stick;
  
    __asm__ ("lda %v", temp); // load a with joystick #
    __asm__ ("jsr %w", JOYSTICK_GET);

    __asm__ ("sta %v", joyA);
    __asm__ ("stx %v", joyB);
    __asm__ ("sty %v", joyC);
}

void main(void) {
    unsigned char running = 1;

    // Initialize all static variables.
    temp = count = joyA = joyB = joyC = 0;

    clrscr();
    cprintf("Please release any buttons...\r\n");
    while (count < 60) {
        VBlankCnt = 0;
        while (!VBlankCnt) { }
        count++;
    }
    cprintf("Now running! Press the START button on your joystick or keyboard.\r\n");

    count = 0;
    while (running) {
        // Wait for vblank.
        VBlankCnt = 0;
        while (!VBlankCnt) { }

        // Count vblanks so we can output a '.' every second to show that the
        // program is still running.
        count++;
        if (count >= 60) {
            cprintf(".");
            count = 0;
        }

        // Read joysticks.
        Read_Joystick(0);
        if (joyC != 0xFF) {
            if ((joyA & 0x10) == 0) {
                cprintf("\r\nSTART has been pressed!\r\n");
                running = 0;
            }
        }
    }
    cprintf("Now exiting.\r\n");
}

Code: Select all

.export _VBlankCnt
.interruptor IRQ_Handler

.bss
_VBlankCnt:  .res 1

.code
IRQ_Handler:
    LDA $9F27
    AND #$01
    BEQ IRQ_Handler_Exit
    INC _VBlankCnt
IRQ_Handler_Exit:
    RTS