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#include <stdlib.h>
#include <stdint.h>
#include <check.h>
#include "6502.h"
#include "bus.h"
#include "memory.h"
enum {
ROM_START = 0xf800,
ROM_END = 0xffff,
ROM_SIZE = 2048,
RAM_START = 0x0000,
RAM_END = 0x01ff,
RAM_SIZE = 512
};
static cpu_6502_t cpu;
static bus_t bus;
static memory_t rom;
static memory_t ram;
static uint8_t code[ROM_SIZE];
static int codesize;
void setup( void )
{
bus_init( &bus );
cpu_6502_init( &cpu, &bus, true );
cpu.debug_flags |= DEBUG_STATUS | DEBUG_STACK | DEBUG_ZERO_PAGE;
memory_init( &rom, MEMORY_ROM, ROM_START, ROM_SIZE, true );
bus_register( &bus, &rom.base, ROM_START, ROM_END );
memory_init( &ram, MEMORY_RAM, RAM_START, RAM_SIZE, true );
bus_register( &bus, &ram.base, RAM_START, RAM_END );
// install code start vector
code[0] = ROM_START & 0x00ff;
code[1] = ( ROM_START & 0xff00 ) >> 8;
codesize = 2;
memory_set( &rom, 0x07fc, code, codesize );
}
void teardown( void )
{
bus_deinit( &bus );
}
START_TEST( test_cpu_6502_nop )
{
cpu_6502_t before_cpu;
cpu_6502_reset( &cpu );
memory_reset( &rom );
memory_reset( &ram );
code[0] = 0xea; // NOP
codesize = 1;
memory_set( &rom, 0x00, code, codesize );
memcpy( &before_cpu, &cpu, sizeof( cpu ) );
cpu_6502_run( &cpu, 1 );
ck_assert_int_eq( cpu.error_state, ERROR_STATE_OK );
ck_assert_int_eq( cpu.PC, before_cpu.PC+1 );
ck_assert_int_eq( cpu.SP, before_cpu.SP );
ck_assert_int_eq( cpu.PS, before_cpu.PS );
ck_assert_int_eq( cpu.A, before_cpu.A );
ck_assert_int_eq( cpu.X, before_cpu.X );
ck_assert_int_eq( cpu.Y, before_cpu.Y );
}
END_TEST
START_TEST( test_cpu_6502_txs )
{
cpu_6502_t before_cpu;
cpu_6502_reset( &cpu );
memory_reset( &rom );
memory_reset( &ram );
code[0] = 0x9a; // TXS
codesize = 1;
memory_set( &rom, 0x00, code, codesize );
cpu.X = 0xff;
memcpy( &before_cpu, &cpu, sizeof( cpu ) );
cpu_6502_run( &cpu, 1 );
ck_assert_int_eq( cpu.error_state, ERROR_STATE_OK );
ck_assert_int_eq( cpu.PC, before_cpu.PC+1 );
ck_assert_int_eq( cpu.SP, cpu.X );
ck_assert_int_eq( cpu.PS, before_cpu.PS );
ck_assert_int_eq( cpu.A, before_cpu.A );
ck_assert_int_eq( cpu.X, 0xff );
ck_assert_int_eq( cpu.Y, before_cpu.Y );
}
END_TEST
Suite *make_cpu_6502_testsuite( void )
{
Suite *suite;
suite = suite_create( "6502 CPU tests" );
TCase *tc_nop = tcase_create( "NOP" );
tcase_add_checked_fixture( tc_nop, setup, teardown);
tcase_add_test( tc_nop, test_cpu_6502_nop );
suite_add_tcase( suite, tc_nop );
TCase *tc_txs = tcase_create( "TXS" );
tcase_add_checked_fixture( tc_txs, setup, teardown);
tcase_add_test( tc_txs, test_cpu_6502_txs );
suite_add_tcase( suite, tc_txs );
return suite;
}
int main( void )
{
SRunner *runner;
int tests_failed = 0;
runner = srunner_create( make_cpu_6502_testsuite( ) );
srunner_set_fork_status( runner, CK_NOFORK );
srunner_set_log( runner, "test.log" );
srunner_set_xml( runner, "test.xml" );
srunner_run_all( runner, CK_VERBOSE );
tests_failed = srunner_ntests_failed( runner );
srunner_free( runner );
exit( ( tests_failed == 0 ) ? EXIT_SUCCESS : EXIT_FAILURE );
}
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