source/src/vm/or.cpp

   1 /*
   2         Skelton for retropc emulator
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2008.06.10-
   6
   7         [ or gate ]
   8 */
   9
  10 #include "or.h"
  11
  12 void OR::write_signal(int id, uint32_t data, uint32_t mask)
  13 {
  14         if(data & mask) {
  15                 bits_in |= id;
  16         } else {
  17                 bits_in &= ~id;
  18         }
  19         bool next = (bits_in != 0);
  20         if(prev != next || first) {
  21                 write_signals(&outputs, next ? 0xffffffff : 0);
  22                 prev = next;
  23                 first = false;
  24         }
  25 }
  26
  27 #define STATE_VERSION   1
  28
  29 bool OR::process_state(FILEIO* state_fio, bool loading)
  30 {
  31         if(!state_fio->StateCheckUint32(STATE_VERSION)) {
  32                 return false;
  33         }
  34         if(!state_fio->StateCheckInt32(this_device_id)) {
  35                 return false;
  36         }
  37         state_fio->StateUint32(bits_in);
  38         state_fio->StateBool(prev);
  39         state_fio->StateBool(first);
  40         return true;
  41 }