if (this.v[x] == n) { this.pc += 2; } break;
          case 0x4: /* SNI */ if (this.v[x] != n) { this.pc += 2; } break;
          case 0x5: /* SEV */ if (this.v[x] == this.v[y]) { this.pc += 2; } break;
          case 0x6: /* LDI */ this.v[x] = n; break;
          case 0x7: /* ADI */ this.v[x] = (this.v[x] + n) % 256; break;
          case 0x8:
            switch(z) {
              case 0x0: /* LDV */ this.v[x] = this.v[y]; break;
              case 0x1: /* IOR */ this.v[x] |= this.v[y]; break;
            