Chip8 Emu Help

[gergep]

thanks for the quick reply, you explanation helped a lot but i dont understand why the app always freezes when emulating.

EDIT: now i have another problem in my CPU - i dont exactly get how you can tell what the opcode is
for example if the opcode is 0xE0 ( clear the screen ), then why is it written like

Code:

opcode = (memory[pc]<<8 + memory[pc+1]);

pc+=2;

switch ((opcode&0xF000)>>12)
{
     case 0x0:
     {
          if ((opcode& 0x00FF) == 0xE0)
          {
              // Clear the screen
              memset(chip8.display, 0, 64*32);
          }
          break;
     }
}

how do you tell how to sort the opcodes under 0x0, 0x1, 0x2 ....
and if the opcode is 1nnn how would you convert that to hex

thanks