Pico/Pico/Pico.c

   1 #include "../PicoInt.h"
   2
   3 // x: 0x03c - 0x19d
   4 // y: 0x1fc - 0x2f7
   5 //    0x2f8 - 0x3f3
   6 picohw_state PicoPicohw;
   7
   8 static int prev_line_cnt_irq3 = 0, prev_line_cnt_irq5 = 0;
   9
  10 static void PicoLineHookPico(int count)
  11 {
  12
  13   PicoPicohw.line_counter += count;
  14   if ((PicoPicohw.line_counter & 0xf) == 0 || count > 10)
  15   {
  16     if (PicoPicohw.fifo_bytes > 0)
  17       PicoPicohw.fifo_bytes--;
  18   }
  19
  20 #if 0
  21   if (PicoPicohw.line_counter - prev_line_cnt_irq3 > 200) {
  22     prev_line_cnt_irq3 = PicoPicohw.line_counter;
  23     // just a guess/hack, allows 101 Dalmantians to boot
  24     elprintf(EL_ANOMALY, "irq3");
  25     SekInterrupt(3);
  26   }
  27 #endif
  28
  29 #if 0
  30   if (PicoPicohw.line_counter - prev_line_cnt_irq5 > 512) {
  31     prev_line_cnt_irq5 = PicoPicohw.line_counter;
  32     elprintf(EL_ANOMALY, "irq5");
  33     SekInterrupt(5);
  34   }
  35 #endif
  36 }
  37
  38 PICO_INTERNAL int PicoInitPico(void)
  39 {
  40   elprintf(EL_STATUS, "Pico detected");
  41   PicoLineHook = PicoLineHookPico;
  42
  43   PicoAHW = PAHW_PICO;
  44   memset(&PicoPicohw, 0, sizeof(PicoPicohw));
  45   PicoPicohw.pen_pos[0] = 0x03c + 352/2;
  46   PicoPicohw.pen_pos[1] = 0x200 + 252/2;
  47   prev_line_cnt_irq3 = 0, prev_line_cnt_irq5 = 0;
  48
  49   return 0;
  50 }
  51