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gr-sim: add 6502 test harness

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This commit is contained in:
Vince Weaver 2018-02-14 13:57:58 -05:00
parent bf430d808a
commit ecc4a5bb1c
2 changed files with 101 additions and 2 deletions
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92
gr-sim/6502_test.c Normal file
View File

@ -0,0 +1,92 @@
#include <stdio.h>
#include "6502_emulate.h"
static void test_adc(void) {
int i,j;
/* carry in 0 */
for(i=0;i<256;i++) {
for(j=0;j<256;j++) {
c=0;
a=i;
adc(j);
if (a!=((i+j)&0xff)) {
printf("ADC: Error! %d+%d should be %d, not %d\n",i,j,i+j,a);
}
if (c!=(((i+j)>>8)&0x1)) {
printf("ADC: Error! Carry should be %d, not %d\n",((i+j)>>8)&0x1,c);
}
if ((a==0) && (z!=1)) printf("ADC error, zflag wrong\n");
if ((a!=0) && (z!=0)) printf("ADC error, zflag wrong\n");
}
}
/* carry in 1 */
for(i=0;i<256;i++) {
for(j=0;j<256;j++) {
c=1;
a=i;
adc(j);
if (a!=((i+j+1)&0xff)) {
printf("ADC: Error! %d+%d should be %d, not %d\n",i,j,i+j+1,a);
}
if (c!=(((i+j+1)>>8)&0x1)) {
printf("ADC: Error! Carry should be %d, not %d\n",((i+j+1)>>8)&0x1,c);
}
if ((a==0) && (z!=1)) printf("ADC error, zflag wrong\n");
if ((a!=0) && (z!=0)) printf("ADC error, zflag wrong\n");
}
}
}
static void test_sbc(void) {
int i,j;
/* carry in 1 */
for(i=0;i<256;i++) {
for(j=0;j<256;j++) {
c=1;
a=i;
sbc(j);
if (a!=((i-j-0)&0xff)) {
printf("SBC: Error! %d-%d should be %d, not %d\n",i,j,i-j-0,a);
}
if (c!=(((i-j-0)>>8)&0x1)) {
printf("SBC: Error! Carry should be %d, not %d\n",((i-j-0)>>8)&0x1,c);
}
if ((a==0) && (z!=1)) printf("SBC error, zflag wrong\n");
if ((a!=0) && (z!=0)) printf("SBC error, zflag wrong\n");
}
}
/* carry in 0 */
for(i=0;i<256;i++) {
for(j=0;j<256;j++) {
c=0;
a=i;
sbc(j);
if (a!=((i-j-1)&0xff)) {
printf("SBC: Error! %d-%d should be %d, not %d\n",i,j,i-j-1,a);
}
if (c!=(((i-j-1)>>8)&0x1)) {
printf("SBC: Error! Carry should be %d, not %d\n",((i-j-1)>>8)&0x1,c);
}
if ((a==0) && (z!=1)) printf("SBC error, zflag wrong\n");
if ((a!=0) && (z!=0)) printf("SBC error, zflag wrong\n");
}
}
}
int main(int argc, char **argv) {
test_adc();
test_sbc();
return 0;
}

11
gr-sim/Makefile
View File

@ -7,7 +7,7 @@ SDL_INCLUDE= `sdl-config --cflags`
all: fade fixed_point rainbow sparkle starfield starfield_fixed kaleido \
tfv mode7_demo text text_demo tfv_multiply rasterbars rasterbars_fixed \
l4d
l4d 6502_test
#### Library
@ -220,10 +220,17 @@ gr-sim.o: gr-sim.c gr-sim.h apple2_font.h
6502_emulate.o: 6502_emulate.c 6502_emulate.h
$(CC) $(CFLAGS) $(SDL_INCLUDE) -c 6502_emulate.c
6502_test: 6502_test.o 6502_emulate.o
$(CC) $(LFLAGS) -o 6502_test 6502_test.o 6502_emulate.o
6502_test.o: 6502_test.c 6502_emulate.h
$(CC) $(CFLAGS) -c 6502_test.c
clean:
rm -f *~ *.o gr-sim rainbow sparkle starfield starfield_fixed kaleido \
tfv text mode7_demo fade fixed_point tfv_multiply \
rasterbars rasterbars_fixed lookup_tables text_demo \
l4d
l4d 6502_test