source/src/vm/ys6464a/display.cpp

   1 /*
   2         SHINKO SANGYO YS-6464A Emulator 'eYS-6464A'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2009.12.30 -
   6
   7         [ display ]
   8 */
   9
  10 #include "display.h"
  11
  12 static const int pat_7seg_led[40][28] = {
  13         {0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0},
  14         {0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0},
  15         {0,0,0,0,0,6,6,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,2,2},
  16         {0,0,0,0,0,6,6,6,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,2,2,2},
  17         {0,0,0,0,0,6,6,6,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,2},
  18         {0,0,0,0,0,6,6,6,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,2},
  19         {0,0,0,0,0,6,6,6,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,2},
  20         {0,0,0,0,0,6,6,6,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,2},
  21         {0,0,0,0,6,6,6,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,2,0},
  22         {0,0,0,0,6,6,6,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,2,0},
  23         {0,0,0,0,6,6,6,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,2,0},
  24         {0,0,0,0,6,6,6,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,2,0},
  25         {0,0,0,0,6,6,6,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,2,0},
  26         {0,0,0,0,6,6,6,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,2,0},
  27         {0,0,0,6,6,6,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,2,0,0},
  28         {0,0,0,6,6,6,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,2,0,0},
  29         {0,0,0,6,6,6,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,2,0,0},
  30         {0,0,0,6,6,6,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,2,2,2,0,0},
  31         {0,0,0,6,6,6,0,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,0,2,2,2,0,0},
  32         {0,0,0,6,6,0,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,0,2,2,0,0},
  33         {0,0,5,5,0,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,0,3,3,0,0,0},
  34         {0,0,5,5,5,0,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,0,3,3,3,0,0,0},
  35         {0,0,5,5,5,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,3,3,3,0,0,0},
  36         {0,0,5,5,5,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,3,3,3,0,0,0},
  37         {0,0,5,5,5,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,3,3,3,0,0,0},
  38         {0,0,5,5,5,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,3,3,3,0,0,0},
  39         {0,5,5,5,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,3,3,3,0,0,0,0},
  40         {0,5,5,5,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,3,3,3,0,0,0,0},
  41         {0,5,5,5,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,3,3,3,0,0,0,0},
  42         {0,5,5,5,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,3,3,3,0,0,0,0},
  43         {0,5,5,5,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,3,3,3,0,0,0,0},
  44         {0,5,5,5,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,3,3,3,0,0,0,0},
  45         {5,5,5,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,3,3,3,0,0,0,0,0},
  46         {5,5,5,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,3,3,3,0,0,0,0,0},
  47         {5,5,5,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,3,3,3,0,0,0,0,0},
  48         {5,5,5,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,3,3,3,0,0,0,0,0},
  49         {5,5,5,0,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,0,3,3,3,0,0,0,0,0},
  50         {5,5,0,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,0,3,3,0,8,8,8,0},
  51         {0,0,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,0,0,8,8,8,8,8},
  52         {0,0,0,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,0,0,0,0,8,8,8,0},
  53 };
  54
  55 void DISPLAY::initialize()
  56 {
  57         memset(seg, 0, sizeof(seg));
  58         pb = pc = 0;
  59
  60         // register event
  61         register_vline_event(this);
  62 }
  63
  64 void DISPLAY::event_vline(int v, int clock)
  65 {
  66         if(!v) {
  67                 memset(seg, 0, sizeof(seg));
  68         }
  69         switch(pc & 0xf0) {
  70         case 0x80:
  71         case 0x90:
  72         case 0xa0:
  73         case 0xb0:
  74         case 0xc0:
  75         case 0xd0:
  76                 for(int i = 0; i < 8; i++) {
  77                         if(~pb & (1 << i)) {
  78                                 seg[(pc >> 4) & 7][i]++;
  79                         }
  80                 }
  81                 break;
  82         }
  83 }
  84
  85 void DISPLAY::write_signal(int id, uint32 data, uint32 mask)
  86 {
  87         if(id == SIG_DISPLAY_PORT_B) {
  88                 pb = data;
  89         } else if(id == SIG_DISPLAY_PORT_C) {
  90                 pc = data & 0xf0;
  91         }
  92 }
  93
  94 void DISPLAY::draw_screen()
  95 {
  96         // draw 7-seg LEDs
  97         scrntype col_h, col_l;
  98         scrntype col[9];
  99
 100         col_h = RGB_COLOR(255, 0, 0);
 101         col_l = RGB_COLOR(107, 0, 0);
 102         col[0] = RGB_COLOR(38, 8, 0);
 103
 104         for(int i = 0; i < 6; i++) {
 105                 for(int j = 0; j < 8; j++) {
 106                         col[j + 1] = (seg[i][j] > 8) ? col_h : col_l;
 107                 }
 108                 for(int y = 0; y < 40; y++) {
 109                         scrntype* dest = emu->screen_buffer(ranges[i].y + y) + ranges[i].x;
 110                         for(int x = 0; x < 28; x++) {
 111                                 dest[x] = col[pat_7seg_led[y][x]];
 112                         }
 113                 }
 114         }
 115 }
 116