mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-07-01 03:29:33 +00:00
93 lines
1.9 KiB
C
93 lines
1.9 KiB
C
#include <stdio.h>
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#include "6502_emulate.h"
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static void test_adc(void) {
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int i,j;
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/* carry in 0 */
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for(i=0;i<256;i++) {
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for(j=0;j<256;j++) {
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c=0;
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a=i;
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adc(j);
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if (a!=((i+j)&0xff)) {
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printf("ADC: Error! %d+%d should be %d, not %d\n",i,j,i+j,a);
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}
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if (c!=(((i+j)>>8)&0x1)) {
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printf("ADC: Error! Carry should be %d, not %d\n",((i+j)>>8)&0x1,c);
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}
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if ((a==0) && (z!=1)) printf("ADC error, zflag wrong\n");
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if ((a!=0) && (z!=0)) printf("ADC error, zflag wrong\n");
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}
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}
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/* carry in 1 */
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for(i=0;i<256;i++) {
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for(j=0;j<256;j++) {
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c=1;
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a=i;
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adc(j);
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if (a!=((i+j+1)&0xff)) {
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printf("ADC: Error! %d+%d should be %d, not %d\n",i,j,i+j+1,a);
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}
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if (c!=(((i+j+1)>>8)&0x1)) {
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printf("ADC: Error! Carry should be %d, not %d\n",((i+j+1)>>8)&0x1,c);
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}
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if ((a==0) && (z!=1)) printf("ADC error, zflag wrong\n");
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if ((a!=0) && (z!=0)) printf("ADC error, zflag wrong\n");
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}
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}
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}
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static void test_sbc(void) {
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int i,j;
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/* carry in 1 */
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for(i=0;i<256;i++) {
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for(j=0;j<256;j++) {
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c=1;
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a=i;
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sbc(j);
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if (a!=((i-j-0)&0xff)) {
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printf("SBC: Error! %d-%d should be %d, not %d\n",i,j,i-j-0,a);
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}
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if (c==(((i-j-0)>>8)&0x1)) {
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printf("SBC: Error! Carry should be %d, not %d\n",((i-j-0)>>8)&0x1,c);
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}
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if ((a==0) && (z!=1)) printf("SBC error, zflag wrong\n");
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if ((a!=0) && (z!=0)) printf("SBC error, zflag wrong\n");
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}
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}
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/* carry in 0 */
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for(i=0;i<256;i++) {
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for(j=0;j<256;j++) {
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c=0;
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a=i;
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sbc(j);
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if (a!=((i-j-1)&0xff)) {
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printf("SBC: Error! %d-%d should be %d, not %d\n",i,j,i-j-1,a);
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}
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if (c==(((i-j-1)>>8)&0x1)) {
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printf("SBC: Error! Carry should be %d, not %d\n",((i-j-1)>>8)&0x1,c);
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}
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if ((a==0) && (z!=1)) printf("SBC error, zflag wrong\n");
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if ((a!=0) && (z!=0)) printf("SBC error, zflag wrong\n");
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}
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}
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}
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int main(int argc, char **argv) {
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test_adc();
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test_sbc();
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return 0;
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}
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