distrib/share/tutorials/yagle/rom/rom5/r256x8_5.vbe

   1 -- VHDL grog description
   2 -- word number      : 256
   3 -- bit number       : 8
   4 -- tri-state output : no
   5 -- package to be used outside of cao-vlsi simulator
   6 -- LIBRARY pkg;
   7 -- USE pkg.p6b_pkg.all;
   8
   9
  10 ENTITY r256x8_5 IS
  11   GENERIC (
  12         CONSTANT area : NATURAL := 404670
  13   );
  14   PORT( adr  : IN BIT_VECTOR(7 DOWNTO 0);
  15         ck   : IN BIT_VECTOR(0 TO 1);
  16         f    : OUT BIT_VECTOR(0 TO 7);
  17         vdd  : IN BIT;
  18         vss  : IN BIT );
  19 END r256x8_5;
  20
  21
  22 ARCHITECTURE VBE OF r256x8_5 IS
  23   SIGNAL m_out : BIT_VECTOR (0 TO 7);
  24
  25 BEGIN
  26    f     <= m_out WHEN (ck = B"00") ELSE
  27             B"00000000";
  28
  29    WITH adr(7 DOWNTO 0) SELECT
  30       m_out(0 TO 7) <= B"11111111" WHEN B"00000000",
  31                        B"11111111" WHEN B"00000001",
  32                        B"11111111" WHEN B"00000010",
  33                        B"11111111" WHEN B"00000011",
  34                        B"11111111" WHEN B"00000100",
  35                        B"11111111" WHEN B"00000101",
  36                        B"11111111" WHEN B"00000110",
  37                        B"11111111" WHEN B"00000111",
  38                        B"11111111" WHEN B"00001000",
  39                        B"11111111" WHEN B"00001001",
  40                        B"11111111" WHEN B"00001010",
  41                        B"11111111" WHEN B"00001011",
  42                        B"11111111" WHEN B"00001100",
  43                        B"11111111" WHEN B"00001101",
  44                        B"11111111" WHEN B"00001110",
  45                        B"11111111" WHEN B"00001111",
  46                        B"11111111" WHEN B"00010000",
  47                        B"11111111" WHEN B"00010001",
  48                        B"11111111" WHEN B"00010010",
  49                        B"11111111" WHEN B"00010011",
  50                        B"11111111" WHEN B"00010100",
  51                        B"11111111" WHEN B"00010101",
  52                        B"11111111" WHEN B"00010110",
  53                        B"11111111" WHEN B"00010111",
  54                        B"11111111" WHEN B"00011000",
  55                        B"11111111" WHEN B"00011001",
  56                        B"11111111" WHEN B"00011010",
  57                        B"11111111" WHEN B"00011011",
  58                        B"11111111" WHEN B"00011100",
  59                        B"11111111" WHEN B"00011101",
  60                        B"11111111" WHEN B"00011110",
  61                        B"11111111" WHEN B"00011111",
  62                        B"11111111" WHEN B"00100000",
  63                        B"11111111" WHEN B"00100001",
  64                        B"11111111" WHEN B"00100010",
  65                        B"11111111" WHEN B"00100011",
  66                        B"11111111" WHEN B"00100100",
  67                        B"11111111" WHEN B"00100101",
  68                        B"11111111" WHEN B"00100110",
  69                        B"11111111" WHEN B"00100111",
  70                        B"11111111" WHEN B"00101000",
  71                        B"11111111" WHEN B"00101001",
  72                        B"11111111" WHEN B"00101010",
  73                        B"11111111" WHEN B"00101011",
  74                        B"11111111" WHEN B"00101100",
  75                        B"11111111" WHEN B"00101101",
  76                        B"11111111" WHEN B"00101110",
  77                        B"11111111" WHEN B"00101111",
  78                        B"11111111" WHEN B"00110000",
  79                        B"11111111" WHEN B"00110001",
  80                        B"11111111" WHEN B"00110010",
  81                        B"11111111" WHEN B"00110011",
  82                        B"11111111" WHEN B"00110100",
  83                        B"11111111" WHEN B"00110101",
  84                        B"11111111" WHEN B"00110110",
  85                        B"11111111" WHEN B"00110111",
  86                        B"11111111" WHEN B"00111000",
  87                        B"11111111" WHEN B"00111001",
  88                        B"11111111" WHEN B"00111010",
  89                        B"11111111" WHEN B"00111011",
  90                        B"11111111" WHEN B"00111100",
  91                        B"11111111" WHEN B"00111101",
  92                        B"11111111" WHEN B"00111110",
  93                        B"11111111" WHEN B"00111111",
  94                        B"11111111" WHEN B"01000000",
  95                        B"11111111" WHEN B"01000001",
  96                        B"11111111" WHEN B"01000010",
  97                        B"11111111" WHEN B"01000011",
  98                        B"11111111" WHEN B"01000100",
  99                        B"11111111" WHEN B"01000101",
 100                        B"11111111" WHEN B"01000110",
 101                        B"11111111" WHEN B"01000111",
 102                        B"11111111" WHEN B"01001000",
 103                        B"11111111" WHEN B"01001001",
 104                        B"11111111" WHEN B"01001010",
 105                        B"11111111" WHEN B"01001011",
 106                        B"11111111" WHEN B"01001100",
 107                        B"11111111" WHEN B"01001101",
 108                        B"11111111" WHEN B"01001110",
 109                        B"11111111" WHEN B"01001111",
 110                        B"11111111" WHEN B"01010000",
 111                        B"11111111" WHEN B"01010001",
 112                        B"11111111" WHEN B"01010010",
 113                        B"11111111" WHEN B"01010011",
 114                        B"11111111" WHEN B"01010100",
 115                        B"11111111" WHEN B"01010101",
 116                        B"11111111" WHEN B"01010110",
 117                        B"11111111" WHEN B"01010111",
 118                        B"11111111" WHEN B"01011000",
 119                        B"11111111" WHEN B"01011001",
 120                        B"11111111" WHEN B"01011010",
 121                        B"11111111" WHEN B"01011011",
 122                        B"11111111" WHEN B"01011100",
 123                        B"11111111" WHEN B"01011101",
 124                        B"11111111" WHEN B"01011110",
 125                        B"11111111" WHEN B"01011111",
 126                        B"11111111" WHEN B"01100000",
 127                        B"11111111" WHEN B"01100001",
 128                        B"11111111" WHEN B"01100010",
 129                        B"11111111" WHEN B"01100011",
 130                        B"11111111" WHEN B"01100100",
 131                        B"11111111" WHEN B"01100101",
 132                        B"11111111" WHEN B"01100110",
 133                        B"11111111" WHEN B"01100111",
 134                        B"11111111" WHEN B"01101000",
 135                        B"11111111" WHEN B"01101001",
 136                        B"11111111" WHEN B"01101010",
 137                        B"11111111" WHEN B"01101011",
 138                        B"11111111" WHEN B"01101100",
 139                        B"11111111" WHEN B"01101101",
 140                        B"11111111" WHEN B"01101110",
 141                        B"11111111" WHEN B"01101111",
 142                        B"11111111" WHEN B"01110000",
 143                        B"11111111" WHEN B"01110001",
 144                        B"11111111" WHEN B"01110010",
 145                        B"11111111" WHEN B"01110011",
 146                        B"11111111" WHEN B"01110100",
 147                        B"11111111" WHEN B"01110101",
 148                        B"11111111" WHEN B"01110110",
 149                        B"11111111" WHEN B"01110111",
 150                        B"11111111" WHEN B"01111000",
 151                        B"11111111" WHEN B"01111001",
 152                        B"11111111" WHEN B"01111010",
 153                        B"11111111" WHEN B"01111011",
 154                        B"11111111" WHEN B"01111100",
 155                        B"11111111" WHEN B"01111101",
 156                        B"11111111" WHEN B"01111110",
 157                        B"11111111" WHEN B"01111111",
 158                        B"11111111" WHEN B"10000000",
 159                        B"11111111" WHEN B"10000001",
 160                        B"11111111" WHEN B"10000010",
 161                        B"11111111" WHEN B"10000011",
 162                        B"11111111" WHEN B"10000100",
 163                        B"11111111" WHEN B"10000101",
 164                        B"11111111" WHEN B"10000110",
 165                        B"11111111" WHEN B"10000111",
 166                        B"11111111" WHEN B"10001000",
 167                        B"11111111" WHEN B"10001001",
 168                        B"11111111" WHEN B"10001010",
 169                        B"11111111" WHEN B"10001011",
 170                        B"11111111" WHEN B"10001100",
 171                        B"11111111" WHEN B"10001101",
 172                        B"11111111" WHEN B"10001110",
 173                        B"11111111" WHEN B"10001111",
 174                        B"11111111" WHEN B"10010000",
 175                        B"11111111" WHEN B"10010001",
 176                        B"11111111" WHEN B"10010010",
 177                        B"11111111" WHEN B"10010011",
 178                        B"11111111" WHEN B"10010100",
 179                        B"11111111" WHEN B"10010101",
 180                        B"11111111" WHEN B"10010110",
 181                        B"11111111" WHEN B"10010111",
 182                        B"11111111" WHEN B"10011000",
 183                        B"11111111" WHEN B"10011001",
 184                        B"11111111" WHEN B"10011010",
 185                        B"11111111" WHEN B"10011011",
 186                        B"11111111" WHEN B"10011100",
 187                        B"11111111" WHEN B"10011101",
 188                        B"11111111" WHEN B"10011110",
 189                        B"11111111" WHEN B"10011111",
 190                        B"11111111" WHEN B"10100000",
 191                        B"11111111" WHEN B"10100001",
 192                        B"11111111" WHEN B"10100010",
 193                        B"11111111" WHEN B"10100011",
 194                        B"11111111" WHEN B"10100100",
 195                        B"11111111" WHEN B"10100101",
 196                        B"11111111" WHEN B"10100110",
 197                        B"11111111" WHEN B"10100111",
 198                        B"11111111" WHEN B"10101000",
 199                        B"11111111" WHEN B"10101001",
 200                        B"11111111" WHEN B"10101010",
 201                        B"11111111" WHEN B"10101011",
 202                        B"11111111" WHEN B"10101100",
 203                        B"11111111" WHEN B"10101101",
 204                        B"11111111" WHEN B"10101110",
 205                        B"11111111" WHEN B"10101111",
 206                        B"11111111" WHEN B"10110000",
 207                        B"11111111" WHEN B"10110001",
 208                        B"11111111" WHEN B"10110010",
 209                        B"11111111" WHEN B"10110011",
 210                        B"11111111" WHEN B"10110100",
 211                        B"11111111" WHEN B"10110101",
 212                        B"11111111" WHEN B"10110110",
 213                        B"11111111" WHEN B"10110111",
 214                        B"11111111" WHEN B"10111000",
 215                        B"11111111" WHEN B"10111001",
 216                        B"11111111" WHEN B"10111010",
 217                        B"11111111" WHEN B"10111011",
 218                        B"11111111" WHEN B"10111100",
 219                        B"11111111" WHEN B"10111101",
 220                        B"11111111" WHEN B"10111110",
 221                        B"11111111" WHEN B"10111111",
 222                        B"11111111" WHEN B"11000000",
 223                        B"11111111" WHEN B"11000001",
 224                        B"11111111" WHEN B"11000010",
 225                        B"11111111" WHEN B"11000011",
 226                        B"11111111" WHEN B"11000100",
 227                        B"11111111" WHEN B"11000101",
 228                        B"11111111" WHEN B"11000110",
 229                        B"11111111" WHEN B"11000111",
 230                        B"11111111" WHEN B"11001000",
 231                        B"11111111" WHEN B"11001001",
 232                        B"11111111" WHEN B"11001010",
 233                        B"11111111" WHEN B"11001011",
 234                        B"11111111" WHEN B"11001100",
 235                        B"11111111" WHEN B"11001101",
 236                        B"11111111" WHEN B"11001110",
 237                        B"11111111" WHEN B"11001111",
 238                        B"11111111" WHEN B"11010000",
 239                        B"11111111" WHEN B"11010001",
 240                        B"11111111" WHEN B"11010010",
 241                        B"11111111" WHEN B"11010011",
 242                        B"11111111" WHEN B"11010100",
 243                        B"11111111" WHEN B"11010101",
 244                        B"11111111" WHEN B"11010110",
 245                        B"11111111" WHEN B"11010111",
 246                        B"11111111" WHEN B"11011000",
 247                        B"11111111" WHEN B"11011001",
 248                        B"11111111" WHEN B"11011010",
 249                        B"11111111" WHEN B"11011011",
 250                        B"11111111" WHEN B"11011100",
 251                        B"11111111" WHEN B"11011101",
 252                        B"11111111" WHEN B"11011110",
 253                        B"11111111" WHEN B"11011111",
 254                        B"11111111" WHEN B"11100000",
 255                        B"11111111" WHEN B"11100001",
 256                        B"11111111" WHEN B"11100010",
 257                        B"11111111" WHEN B"11100011",
 258                        B"11111111" WHEN B"11100100",
 259                        B"11111111" WHEN B"11100101",
 260                        B"11111111" WHEN B"11100110",
 261                        B"11111111" WHEN B"11100111",
 262                        B"11111111" WHEN B"11101000",
 263                        B"11111111" WHEN B"11101001",
 264                        B"11111111" WHEN B"11101010",
 265                        B"11111111" WHEN B"11101011",
 266                        B"11111111" WHEN B"11101100",
 267                        B"11111111" WHEN B"11101101",
 268                        B"11111111" WHEN B"11101110",
 269                        B"11111111" WHEN B"11101111",
 270                        B"11111111" WHEN B"11110000",
 271                        B"11111111" WHEN B"11110001",
 272                        B"11111111" WHEN B"11110010",
 273                        B"11111111" WHEN B"11110011",
 274                        B"11111111" WHEN B"11110100",
 275                        B"11111111" WHEN B"11110101",
 276                        B"11111111" WHEN B"11110110",
 277                        B"11111111" WHEN B"11110111",
 278                        B"11111111" WHEN B"11111000",
 279                        B"11111111" WHEN B"11111001",
 280                        B"11111111" WHEN B"11111010",
 281                        B"11111111" WHEN B"11111011",
 282                        B"11111111" WHEN B"11111100",
 283                        B"11111111" WHEN B"11111101",
 284                        B"11111111" WHEN B"11111110",
 285                        B"11111111" WHEN B"11111111";
 286
 287   ASSERT (vss = '0')
 288   REPORT   "Power supply is missing on vss"
 289   SEVERITY ERROR;
 290   ASSERT (vdd = '1')
 291   REPORT   "Power supply is missing on vdd"
 292   SEVERITY ERROR;
 293
 294 END VBE;