source/src/vm/ys6464a/keyboard.cpp

   1 /*
   2         SHINKO SANGYO YS-6464A Emulator 'eYS-6464A'
   3
   4         Author : Takeda.Toshiya
   5         Date   : 2009.12.30 -
   6
   7         [ keyboard ]
   8 */
   9
  10 #include "keyboard.h"
  11 #include "../i8255.h"
  12
  13 void KEYBOARD::initialize()
  14 {
  15         key_stat = emu->get_key_buffer();
  16 }
  17
  18 void KEYBOARD::write_signal(int id, uint32 data, uint32 mask)
  19 {
  20         uint8 val = 0x0f;
  21
  22         switch(data & 0xf0) {
  23         case 0x80:
  24                 if(key_stat[0x30]) val &= ~1;   // 0
  25                 if(key_stat[0x34]) val &= ~2;   // 4
  26                 if(key_stat[0x38]) val &= ~4;   // 8
  27                 if(key_stat[0x43]) val &= ~8;   // c
  28                 break;
  29         case 0x90:
  30                 if(key_stat[0x31]) val &= ~1;   // 1
  31                 if(key_stat[0x35]) val &= ~2;   // 5
  32                 if(key_stat[0x39]) val &= ~4;   // 9
  33                 if(key_stat[0x44]) val &= ~8;   // d
  34                 break;
  35         case 0xa0:
  36                 if(key_stat[0x32]) val &= ~1;   // 2
  37                 if(key_stat[0x36]) val &= ~2;   // 6
  38                 if(key_stat[0x41]) val &= ~4;   // a
  39                 if(key_stat[0x45]) val &= ~8;   // e
  40                 break;
  41         case 0xb0:
  42                 if(key_stat[0x33]) val &= ~1;   // 3
  43                 if(key_stat[0x37]) val &= ~2;   // 7
  44                 if(key_stat[0x42]) val &= ~4;   // b
  45                 if(key_stat[0x46]) val &= ~8;   // f
  46                 break;
  47         case 0xc0:
  48                 if(key_stat[0x70]) val &= ~1;   // wr inc
  49                 if(key_stat[0x71]) val &= ~2;   // rd dec
  50                 if(key_stat[0x72]) val &= ~4;   // rd inc
  51                 if(key_stat[0x73]) val &= ~8;   // ad run
  52                 break;
  53         }
  54         d_pio->write_signal(SIG_I8255_PORT_C, val, 0xf);
  55 }
  56