int main(int argc, char *argv[])
{
init_mdata();
init_adata();
printf("Loading file 'bytecode'\n");
pc_t* pc = pc_new("bytecode");
while (pc_safe(pc))
{
printf("ADDR: %x, OP: %x\n", pc->address, pc->line->op);
pc_inc(pc, 1);
pc_update(pc);
}
pc_inc(pc, -1);
pc_branch(pc, 1);
pc_update(pc);
while (pc_safe(pc))
{
printf("ADDR: %x, OP: %x\n", pc->address, pc->line->op);
pc_inc(pc, 1);
pc_update(pc);
}
pc_return(pc);
pc_update(pc);
printf("ADDR: %x, OP: %x\n", pc->address, pc->line->op);
pc_del(pc);
return 0;
}
unsigned int cop421_execute(unsigned int cycles)
{
unsigned int completed_cycles;
for (completed_cycles = 0; completed_cycles < cycles; completed_cycles++)
{
// Store current instruction
cur_inst = coprom[PC];
inst_pc = PC;
// Do preinstruction stuff
preinst();
pc_inc();
if (!g_skip)
{
if (cur_inst == 0x23 || cur_inst == 0x33 || (cur_inst >= 0x60 && cur_inst <= 0x63) || (cur_inst >= 0x68 && cur_inst <= 0x6b))
{
cur_operand = coprom[PC];
pc_inc();
execute_two_byte();
// TODO: two byte instructions take two clocks?
completed_cycles++;
counter_inc();
counter_inc();
}
else // If its one byte
{
counter_inc();
execute_one_byte();
}
}
else
{
g_skip = 0;
if (cur_inst == 0x23 || cur_inst == 0x33 || (cur_inst >= 0x60 && cur_inst <= 0x63) || (cur_inst >= 0x68 && cur_inst <= 0x6b))
{
pc_inc();
}
completed_cycles--; // TODO: a skipped instruction doesn't take a clock cycle?
}
}
return completed_cycles;
}
