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attempt to run nestest

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This commit is contained in:
jborza 2019-04-29 06:37:56 +02:00
parent be5bd3aa27
commit 2b52c43605
7 changed files with 44 additions and 22 deletions
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6
cpu.c
View File

@ -30,6 +30,12 @@ void set_NZ_flags(State6502 * state, byte value) {
state->flags.n = is_negative(value);
}
byte flags_as_byte(State6502* state) {
byte flags_value;
memcpy(&flags_value, &state->flags, sizeof(Flags));
return flags_value;
}
void clear_flags(State6502 * state) {
state->flags.b =
state->flags.c =

1
cpu.h
View File

@ -8,3 +8,4 @@ int emulate_6502_op(State6502* state);
void clear_flags(State6502* state);
void clear_state(State6502* state);
byte flags_as_byte(State6502* state);

2
debugger_windows.c
View File

@ -134,7 +134,7 @@ void print_frame() {
}
}
int main(int argc, char* argv[]) {
int main2(int argc, char* argv[]) {
State6502 state;
clear_state(&state);
state.memory = malloc(MEMORY_SIZE);

4
disassembler.c
View File

@ -182,7 +182,5 @@ void disassemble_6502(byte* buffer, word pc) {
else {
printf(" ");
}
printf(op);
printf("\n");
printf(" %s", op);
}

45
emu6502.c
View File

@ -9,33 +9,46 @@
#include "disassembler.h"
#include "opcodes.h"
#include "test6502.h"
#include <errno.h>
#include <direct.h>
byte* read_game() {
FILE* file = fopen("..\\bins\\tetris.bin", "r");
//byte* buffer = malloc(0x800);
byte buffer[32];
int read = fread(&buffer, sizeof(byte), 32, file);
#define NESTEST_SIZE 0x4000
#define NESTEST_DST 0xC000
#define MEMORY_SIZE 0xFFFF
byte* read_nestest() {
FILE* file = fopen("nestest\\nestest.bin", "rb");
if (!file) {
int err = errno;
exit(1);
}
byte buffer[NESTEST_SIZE];
int read = fread(&buffer, sizeof(byte), NESTEST_SIZE, file);
fclose(file);
return buffer;
}
void emulate_game() {
void run_nestest() {
State6502 state;
//FILE* file = fopen("..\\bins\\tetris.bin", "r");
clear_state(&state);
state.memory = read_game();
for (int i = 0; i < 100; i++) {
disassemble_6502(state.memory, i);
}
state.memory = malloc(MEMORY_SIZE);
memset(state.memory, 0, MEMORY_SIZE);
byte* bin = read_nestest();
//const word TARGET = 0xC000;
memcpy(state.memory + NESTEST_DST, bin, NESTEST_SIZE);
memcpy(state.memory + 0x8000, bin, NESTEST_SIZE);
state.pc = NESTEST_DST;
do{
disassemble_6502(state.memory, state.pc);
emulate_6502_op(&state);
printf(" A:%02X X:%02X Y:%02X P:%02X SP:%02X\n", state.a, state.x, state.y, flags_as_byte(&state), state.sp);
} while (state.flags.b != 1);
}
int main()
{
//emulate_game();
run_tests();
printf("All tests succeeded.\n");
run_nestest();
//run_tests();
return 0;
}

1
emu6502.vcxproj
View File

@ -152,6 +152,7 @@
</ItemDefinitionGroup>
<ItemGroup>
<ClCompile Include="cpu.c" />
<ClCompile Include="debugger_windows.c" />
<ClCompile Include="disassembler.c" />
<ClCompile Include="emu6502.c" />
<ClCompile Include="memory.c" />

3
test6502.c
View File

@ -40,6 +40,7 @@ void print_all(State6502 * state) {
void test_step(State6502 * state) {
print_all(state);
disassemble_6502(state->memory, state->pc);
printf("\n");
emulate_6502_op(state);
print_all(state);
}
@ -48,6 +49,7 @@ void test_step_until_break(State6502 * state) {
do {
print_all(state);
disassemble_6502(state->memory, state->pc);
printf("\n");
emulate_6502_op(state);
} while (state->flags.b != 1);
print_all(state);
@ -1870,6 +1872,7 @@ void test_PHA_PLA() {
//act
for (int i = 0; i < 9; i++) {
disassemble_6502(state.memory, state.pc);
printf("\n");
emulate_6502_op(&state);
}