/***************************************************************************** * plasma test program for cc65.                                             * *                                                                           * * (w)2001 by groepaz/hitmen                                                 * *                                                                           * * Cleanup and porting by Ullrich von Bassewitz.			     * *                                                                           * *****************************************************************************/#include <stdlib.h>#include <time.h>#include <conio.h>#if defined(__C64__) || defined(__C128__)#  define SCREEN1               0xE000#  define SCREEN2               0xE400#  define CHARSET               0xE800#  define outb(addr,val)       	(*(addr)) = (val)#  define inb(addr)             (*(addr))#elif defined(__CBM510__)#  define SCREEN1               0xF000#  define SCREEN2               0xF400#  define CHARSET               0xE000#  define outb(addr,val)	pokebsys ((unsigned)(addr), val)#  define inb(addr)             peekbsys ((unsigned)(addr))#endif/* Values for the VIC address register to switch between the two pages */#define PAGE1                   ((SCREEN1 >> 6) & 0xF0) | ((CHARSET >> 10) & 0x0E)#define PAGE2                   ((SCREEN2 >> 6) & 0xF0) | ((CHARSET >> 10) & 0x0E)/* Use static local variables for speed */#pragma staticlocals (1); static const unsigned char sinustable[0x100] = {    0x80, 0x7d, 0x7a, 0x77, 0x74, 0x70, 0x6d, 0x6a,    0x67, 0x64, 0x61, 0x5e, 0x5b, 0x58, 0x55, 0x52,    0x4f, 0x4d, 0x4a, 0x47, 0x44, 0x41, 0x3f, 0x3c,    0x39, 0x37, 0x34, 0x32, 0x2f, 0x2d, 0x2b, 0x28,    0x26, 0x24, 0x22, 0x20, 0x1e, 0x1c, 0x1a, 0x18,    0x16, 0x15, 0x13, 0x11, 0x10, 0x0f, 0x0d, 0x0c,    0x0b, 0x0a, 0x08, 0x07, 0x06, 0x06, 0x05, 0x04,    0x03, 0x03, 0x02, 0x02, 0x02, 0x01, 0x01, 0x01,    0x01, 0x01, 0x01, 0x01, 0x02, 0x02, 0x02, 0x03,    0x03, 0x04, 0x05, 0x06, 0x06, 0x07, 0x08, 0x0a,    0x0b, 0x0c, 0x0d, 0x0f, 0x10, 0x11, 0x13, 0x15,    0x16, 0x18, 0x1a, 0x1c, 0x1e, 0x20, 0x22, 0x24,    0x26, 0x28, 0x2b, 0x2d, 0x2f, 0x32, 0x34, 0x37,    0x39, 0x3c, 0x3f, 0x41, 0x44, 0x47, 0x4a, 0x4d,    0x4f, 0x52, 0x55, 0x58, 0x5b, 0x5e, 0x61, 0x64,    0x67, 0x6a, 0x6d, 0x70, 0x74, 0x77, 0x7a, 0x7d,    0x80, 0x83, 0x86, 0x89, 0x8c, 0x90, 0x93, 0x96,    0x99, 0x9c, 0x9f, 0xa2, 0xa5, 0xa8, 0xab, 0xae,    0xb1, 0xb3, 0xb6, 0xb9, 0xbc, 0xbf, 0xc1, 0xc4,    0xc7, 0xc9, 0xcc, 0xce, 0xd1, 0xd3, 0xd5, 0xd8,    0xda, 0xdc, 0xde, 0xe0, 0xe2, 0xe4, 0xe6, 0xe8,    0xea, 0xeb, 0xed, 0xef, 0xf0, 0xf1, 0xf3, 0xf4,    0xf5, 0xf6, 0xf8, 0xf9, 0xfa, 0xfa, 0xfb, 0xfc,    0xfd, 0xfd, 0xfe, 0xfe, 0xfe, 0xff, 0xff, 0xff,    0xff, 0xff, 0xff, 0xff, 0xfe, 0xfe, 0xfe, 0xfd,    0xfd, 0xfc, 0xfb, 0xfa, 0xfa, 0xf9, 0xf8, 0xf6,    0xf5, 0xf4, 0xf3, 0xf1, 0xf0, 0xef, 0xed, 0xeb,    0xea, 0xe8, 0xe6, 0xe4, 0xe2, 0xe0, 0xde, 0xdc,    0xda, 0xd8, 0xd5, 0xd3, 0xd1, 0xce, 0xcc, 0xc9,    0xc7, 0xc4, 0xc1, 0xbf, 0xbc, 0xb9, 0xb6, 0xb3,    0xb1, 0xae, 0xab, 0xa8, 0xa5, 0xa2, 0x9f, 0x9c,    0x99, 0x96, 0x93, 0x90, 0x8c, 0x89, 0x86, 0x83};static void doplasma (register unsigned char* scrn){    unsigned char xbuf[40];    unsigned char ybuf[25];    unsigned char c1a,c1b;    unsigned char c2a,c2b;    unsigned char c1A,c1B;    unsigned char c2A,c2B;    register unsigned char i, ii;    c1a = c1A;    c1b = c1B;    for (ii = 0; ii < 25; ++ii) {        ybuf[ii] = (sinustable[c1a] + sinustable[c1b]);        c1a += 4;	c1b += 9;    }    c1A += 3;    c1B -= 5;    c2a = c2A;    c2b = c2B;    for (i = 0; i < 40; ++i) {        xbuf[i] = (sinustable[c2a] + sinustable[c2b]);        c2a += 3;	c2b += 7;    }    c2A += 2;    c2B -= 3;    for (ii = 0; ii < 25; ++ii) {	/* Unrolling the following loop will give a speed increase of	 * nearly 100% (~24fps), but it will also increase the code	 * size a lot.	 */        for (i = 0; i < 40; ++i, ++scrn) {            *scrn = (xbuf[i] + ybuf[ii]);        }    }}static void makechar (void){    static const unsigned char bittab[8] = {	0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80    };    unsigned char i, ii, b, s;    unsigned c;    gotoxy (0, 1);    for (c = 0; c < 0x100; ++c) {    	s = sinustable[c];        for (i = 0; i < 8; ++i){            b = 0;            for (ii = 0; ii < 8; ++ii) {                if ((rand() & 0xFF) > s) {      	     	    b |= bittab[ii];    	     	}            }            ((unsigned char*)CHARSET) [(c*8) + i] = b;        }    	if ((c & 0x07) == 0) {    	    cputc ('.');    	}    }}int main (void){    unsigned char border;    unsigned char background;    unsigned char text;    unsigned char v;    clock_t       t;    unsigned long f = 0;    unsigned long sec;    unsigned      sec10;    unsigned long fps;    unsigned      fps10;#if defined(__C64__)    unsigned char block;#endif#if defined(__C128__)    unsigned char block;    unsigned char initflag;    unsigned char graphflag;#endif    clrscr ();    cprintf ("Making charset, mompls");    makechar();    /* Set the border and background colors */    border     = bordercolor (COLOR_BLUE);    background = bgcolor (COLOR_BLUE);    text       = textcolor (COLOR_BLACK);    clrscr ();#if defined(__C64__) || defined(__C128__)    /* Move the VIC 16K block */    block = inb (&CIA2.pra);    outb (&CIA2.pra, (block & 0xFC) | ((SCREEN1 >> 14) ^ 0x03));#endif#if defined(__C128__)    /* Save and change some flags, so that kernal/basic interupt handler will     * not interfere with our routine.     */    initflag = *(unsigned char*) 0xA04;    *(unsigned char*) 0xA04 &= 0xFE;    graphflag = *(unsigned char*) 0xD8;    *(unsigned char*) 0xD8 = 0xFF;#endif    /* Remember the VIC address register */    v = inb (&VIC.addr);    /* Run the demo until a key was hit */    t = clock ();    while (!kbhit()) {      	/* Build page 1, then make it visible */        doplasma ((unsigned char*)SCREEN1);      	outb (&VIC.addr, PAGE1);      	/* Build page 2, then make it visible */        doplasma ((unsigned char*)SCREEN2);      	outb (&VIC.addr, PAGE2);      	/* Count frames */        f += 2;    }    t = clock() - t;    /* Switch back the VIC screen */    outb (&VIC.addr, v);#if defined(__C64__) || defined(__C128__)    /* Move back the VIC 16K block */    outb (&CIA2.pra, block);#endif#if defined(__C128__)    /* Restore the flags */    *(unsigned char*) 0xA04 = initflag;    *(unsigned char*) 0xD8  = graphflag;#endif    /* Fetch the character from the keyboard buffer and discard it */    (void) cgetc();    /* Reset screen colors */    bordercolor (border);    bgcolor (background);    textcolor (text);    clrscr ();    /* Calculate stats */    sec   = (t * 10) / CLK_TCK;    sec10 = sec % 10;    sec  /= 10;    fps   = (f * (CLK_TCK * 10)) / t;    fps10 = fps % 10;    fps  /= 10;    /* Output stats */    gotoxy (0, 0); cprintf ("time  : %lu.%us", sec, sec10);    gotoxy (0, 1); cprintf ("frames: %lu", f);    gotoxy (0, 2); cprintf ("fps   : %lu.%u", fps, fps10);    /* Wait for a key, then end */    cputsxy (0, 4, "Press any key when done...");    (void) cgetc ();    /* Done */    return EXIT_SUCCESS;}