Cache thrash test 2

cache2.c

/*
 *--------------------------------------
 * Program Name:
 * Author:
 * License:
 * Description:
 *--------------------------------------
*/

/* Keep these headers */
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <tice.h>

/* Standard headers (recommended) */
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/* Put your function prototypes here */

/* Put all your globals here */
#define COPY_SIZE 65536
unsigned char target[COPY_SIZE];
#define asm_var_1 (*(volatile unsigned char**)0xD00000)
#define asm_var_1a (*(volatile unsigned char*)0xD00000)
#define asm_var_2 (*(volatile unsigned int*)0xD00003)


void PutC(unsigned char c)
{
    asm("   di");
    asm_var_1a = c;
    asm("   ld  a, ($D00000)");
    asm("   call    00207B8h");
    asm("   ei");

}

void PrintHex(uint32_t n)
{
    unsigned char i;
    unsigned char d;
    for (i = 0; i < 8; i++)
    {
        d = (unsigned char)(n >> 28) + '0';
        if (d > '9')
            d += 'A' - '9' - 1;
        PutC(d);
        n = n << 4;
    }
}

void main(void) {
    uint32_t count1;
    uint32_t count2;

    os_ClrHome();

    asm("	di");
    asm("	push	iy");
    timer_Control = TIMER1_DISABLE;
    timer_1_Counter = 0;
    timer_Control = TIMER1_ENABLE | TIMER1_CPU | TIMER1_UP;
    asm("	push	ix");
    asm("	ld	hl, 0");
    asm("	exx");
    asm("	ld	hl, 0");
    asm("	ld	ix, 0");
    asm("	ld	iy, 0");
    asm("	ld	bc, $0008");
    asm("loop:");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	ld	de, (ix)");
    asm("	ld	de, (iy)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	ld	de, (ix)");
    asm("	ld	de, (iy)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	ld	de, (ix)");
    asm("	ld	de, (iy)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	ld	de, (ix)");
    asm("	ld	de, (iy)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	ld	de, (ix)");
    asm("	ld	de, (iy)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	ld	de, (ix)");
    asm("	ld	de, (iy)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	ld	de, (ix)");
    asm("	ld	de, (iy)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	ld	de, (ix)");
    asm("	ld	de, (iy)");
    asm("	djnz	loop");
    asm("	dec	c");
    asm("	jr	nz, loop");
    asm("	pop	ix");
    count1 = atomic_load_increasing_32(&timer_1_Counter);

    timer_Control = TIMER1_DISABLE;
    timer_1_Counter = 0;
    timer_Control = TIMER1_ENABLE | TIMER1_CPU | TIMER1_UP;
    asm("	push	ix");
    asm("	ld	hl, 0");
    asm("	exx");
    asm("	ld	hl, $10000");
    asm("	ld	ix, $20000");
    asm("	ld	iy, $30000");
    asm("	ld	bc, $0008");
    asm("loop2:");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	ld	de, (ix)");
    asm("	ld	de, (iy)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	ld	de, (ix)");
    asm("	ld	de, (iy)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	ld	de, (ix)");
    asm("	ld	de, (iy)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	ld	de, (ix)");
    asm("	ld	de, (iy)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	ld	de, (ix)");
    asm("	ld	de, (iy)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	ld	de, (ix)");
    asm("	ld	de, (iy)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	ld	de, (ix)");
    asm("	ld	de, (iy)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	exx");
    asm("	ld	de, (hl)");
    asm("	ld	de, (ix)");
    asm("	ld	de, (iy)");
    asm("	djnz	loop2");
    asm("	dec	c");
    asm("	jr	nz, loop2");
    asm("	pop	ix");
    count2 = atomic_load_increasing_32(&timer_1_Counter);
    timer_Control = TIMER1_DISABLE;

    asm("	pop	iy");
    asm("   ei");

    PrintHex(count1);
    os_NewLine();
    PrintHex(count2);
    os_NewLine();
    
    /* Wait for a key press */
    while (!os_GetCSC());

}

/* Put other functions here */