cpu/src/rom_b.vhd

   1 library ieee;
   2
   3 use IEEE.std_logic_1164.all;
   4 use IEEE.numeric_std.all;
   5
   6 use work.mem_pkg.all;
   7
   8 architecture behaviour of rom is
   9
  10         signal vsim_bug : std_logic_vector(31 downto 0);
  11
  12 begin
  13         process(clk)
  14         begin
  15                 if rising_edge(clk) then
  16 --               data_out <= ram(to_integer(UNSIGNED(rd_addr)));
  17
  18
  19         --case rrrr_addr(10 downto 0) is
  20                         case vsim_bug(6 downto 0) is
  21         -- fibonacci
  22 --                              when "00000000000" => data_out <= "11101101000000000000000000000000"; --
  23 --                              when "00000000001" => data_out <= "11101101001000000000000000000000"; --
  24 --                              when "00000000010" => data_out <= "11100111101000000000000000000000"; --
  25 --
  26 --                              when "00000000011" => data_out <= "11100001000000000000000000100001"; --
  27 --                              when "00000000100" => data_out <= "11101100100000000000001100000000"; --
  28 --                              when "00000000101" => data_out <= "00001011011111111111111010000011"; --
  29 --
  30 --                              when "00000000110" => data_out <= "11101101000000000000000000001000"; --
  31 --                              when "00000000111" => data_out <= "11100111100000000000000000001111"; --
  32 --                              when "00000001000" => data_out <= "11100111100000000000000000010011"; -- --
  33 --
  34 --
  35 --                              when "00000001001" => data_out <= x"ed080048"; --x"ed080048"; --
  36 --                              when "00000001010" => data_out <= x"ed500080"; --
  37 --                              when "00000001011" => data_out <= x"fd500002"; --
  38 --                              when "00000001100" => data_out <= x"eb000107";
  39 --                              when "00000001101" => data_out <= "11101011000000000000011010000010"; --"11101011000000000000000000000010";
  40 --
  41 --                              when "00000001110" => data_out <= x"e5088800";
  42 --                              when "00000001111" => data_out <= x"e0150800";
  43 --                              when "00000010000" => data_out <= x"e7010000";
  44 --                              when "00000010001" => data_out <= x"ec800000";
  45 --                              when "00000010010" => data_out <= x"0b000008";
  46 --                              when "00000010011" => data_out <= x"e1910020";
  47 --                              when "00000010100" => data_out <= x"eb7ffe07";
  48 --                              when "00000010101" => data_out <= x"e7197ffc";
  49 --                              when "00000010110" => data_out <= x"e0018000";
  50 --
  51 --                              when "00000010111" => data_out <= x"e1110020";
  52 --                              when "00000011000" => data_out <= x"e7810000";
  53 --                              when "00000011001" => data_out <= x"eb00000a";
  54 --
  55 --
  56 --                              when "00000011010" => data_out <= x"ed290080";
  57 --                              when "00000011011" => data_out <= x"e1080000";
  58 --
  59 --                              when "00000011100" => data_out <= x"e78a8000";
  60 --
  61 --                              when "00000011101" => data_out <= x"ed510058";
  62 --                              when "00000011110" => data_out <= x"e7850000";
  63
  64                         -- uart echo
  65
  66 --1;00000000;ed010058;ldi r0, 0x200B;;
  67 --1;00000004;ed090060;ldi r1, 0x200C;;
  68 --1;00000008;ed110080;ldi r2, 0x2010;;
  69 --1;0000000c;e7188000;ldw r3, 0(r1);;
  70 --1;00000010;ec1a0000;cmp r3, r4;;
  71 --1;00000014;1b7ffd81;breq 0;;
  72 --1;00000018;e7980000;stw r3, 0(r0);;
  73 --1;0000001c;e7990000;stw r3, 0(r2);;
  74 --1;00000020;e1218000;addi r4, r3, 0;;
  75 --1;00000024;eb7ffb81;br 0;;
  76
  77 --                              when "0000000" => data_out <= x"ed010058";
  78 --                              when "0000001" => data_out <= x"ed090060";
  79 --                              when "0000010" => data_out <= x"ed110080"; --x"e7188000";  f
  80 --                              when "0000011" => data_out <= x"e7188000"; --x"ec1a0000";
  81 --                              when "0000100" => data_out <= x"ec1a0000";
  82 --                              when "0000101" => data_out <= x"1b7ffe01";
  83 --                              when "0000110" => data_out <= x"e7990000"; -- f
  84 --                              when "0000111" => data_out <= x"e7980000";
  85 --                              when "0001000" => data_out <= x"e1218000";
  86 --                              when "0001001" => data_out <= x"eb7ffb81";
  87
  88 --1;00000000;ed010058;ldi r0, 0x200B;;;
  89 --1;00000004;ed090060;ldi r1, 0x200C;;;
  90 --1;00000008;ed110080;ldi r2, 0x2010;;;
  91 --1;0000000c;ed390078;ldi r7, 0x200F;;;
  92 --1;00000010;ed480012;ldih r9, 0x0002;;;
  93 --1;00000014;e7438000;ldw r8, 0(r7);;;
  94 --1;00000018;e254c000;and r10, r9, r8;;;
  95 --1;0000001c;07188000;ldwnz r3, 0(r1);;;
  96 --1;00000020;07980000;stwnz r3, 0(r0);;;
  97 --1;00000024;07990000;stwnz r3, 0(r2);;;
  98 --1;00000028;eb7ffb01;br 0;;;
  99
 100 --uart test:
 101
 102 --                              when "0000000" => data_out <= x"ed010058";
 103 --                              when "0000001" => data_out <= x"ed090060";
 104 --                              when "0000010" => data_out <= x"ed110080"; --x"e7188000";  f
 105 --                              when "0000011" => data_out <= x"ed390000"; --x"ec1a0000";
 106 --                              when "0000100" => data_out <= x"ed480012";
 107 --                              when "0000101" => data_out <= x"e7438000";
 108 --                              when "0000110" => data_out <= x"e254c000"; -- f
 109 --                              when "0000111" => data_out <= x"07188000";
 110 --                              when "0001000" => data_out <= x"07980000";
 111 --                              when "0001001" => data_out <= x"07990000";
 112 --                              when "0001010" => data_out <= x"eb7ffb81";
 113
 114 -------------------------------------------
 115
 116 --                              when "00000000000" => data_out <= x"ed000000";
 117 --                              when "00000000001" => data_out <= x"ed080008";
 118 --                              when "00000000010" => data_out <= x"e9880000"; --x"e7188000";  f
 119 --                              when "00000000011" => data_out <= x"e5088400"; --x"ec1a0000";
 120 --                              when "00000000100" => data_out <= x"e9880001";
 121 --                              when "00000000101" => data_out <= x"e7180000";
 122 --                              when "00000000110" => data_out <= x"e9200001"; -- f
 123 --                              when "00000000111" => data_out <= x"e7a00004";
 124 --                              when "00000001000" => data_out <= x"e7280004";
 125 --                      --      when "00000001001" => data_out <= x"eb7ffb81";
 126         when "0000000" => data_out <= x"eb000183"; -- br+ main
 127         when "0000001" => data_out <= x"eb000103"; -- br+ main
 128         when "0000010" => data_out <= x"eb000008"; -- ret
 129         when "0000011" => data_out <= x"ed510000"; -- ldi r10, UART_BASE@lo
 130         when "0000100" => data_out <= x"ed500002"; -- ldih r10, UART_BASE@hi
 131         when "0000101" => data_out <= x"ed590180"; -- ldi r11, PBASE@lo
 132         when "0000110" => data_out <= x"ed580002"; -- ldih r11, PBASE@hi
 133         when "0000111" => data_out <= x"e71d0000"; -- ldw r3, UART_STATUS(r10)
 134         when "0001000" => data_out <= x"e2980010"; -- andx r3, UART_RECV_NEW
 135         when "0001001" => data_out <= x"1b7fff03"; -- brzs+ poll
 136         when "0001010" => data_out <= x"eb000985"; -- call recv_byte
 137         when "0001011" => data_out <= x"e4088800"; -- xor r1, r1, r1
 138         when "0001100" => data_out <= x"ec800240"; -- cmpi r0, 0x48
 139         when "0001101" => data_out <= x"1b001881"; -- breq- bt_H
 140         when "0001110" => data_out <= x"eb7ffc81"; -- br poll
 141         when "0001111" => data_out <= x"e71d0000"; -- ldw r3, UART_STATUS(r10)
 142         when "0010000" => data_out <= x"e2980008"; -- andx r3, UART_TRANS_EMPTY
 143         when "0010001" => data_out <= x"0b7fff03"; -- brnz+ send_byte
 144         when "0010010" => data_out <= x"e98d0008"; -- stb r1, UART_TRANS(r10)
 145         when "0010011" => data_out <= x"eb000008"; -- ret
 146         when "0010100" => data_out <= x"e5008008"; -- lrs r0, r1, 0
 147         when "0010101" => data_out <= x"eb7ffd05"; -- call send_byte
 148         when "0010110" => data_out <= x"e500a008"; -- lrs r0, r1, 8
 149         when "0010111" => data_out <= x"eb7ffc05"; -- call send_byte
 150         when "0011000" => data_out <= x"e500c008"; -- lrs r0, r1, 16
 151         when "0011001" => data_out <= x"eb7ffb05"; -- call send_byte
 152         when "0011010" => data_out <= x"e500e008"; -- lrs r0, r1, 24
 153         when "0011011" => data_out <= x"eb7ffa05"; -- call send_byte
 154         when "0011100" => data_out <= x"eb000008"; -- ret
 155         when "0011101" => data_out <= x"e71d0000"; -- ldw r3, UART_STATUS(r10)
 156         when "0011110" => data_out <= x"e2980010"; -- andx r3, UART_RECV_NEW
 157         when "0011111" => data_out <= x"1b7fff03"; -- brzs+ recv_byte
 158         when "0100000" => data_out <= x"e4000000"; -- xor r0, r0, r0
 159         when "0100001" => data_out <= x"e905000c"; -- ldb r0, UART_RECV(r10)
 160         when "0100010" => data_out <= x"eb000008"; -- ret
 161         when "0100011" => data_out <= x"e4088800"; -- xor r1, r1, r1
 162         when "0100100" => data_out <= x"eb7ffc85"; -- call recv_byte
 163         when "0100101" => data_out <= x"e3080800"; -- or r1, r0, r1
 164         when "0100110" => data_out <= x"eb7ffb85"; -- call recv_byte
 165         when "0100111" => data_out <= x"e508a000"; -- lls r1, r1, 8
 166         when "0101000" => data_out <= x"e3080800"; -- or r1, r0, r1
 167         when "0101001" => data_out <= x"eb7ffa05"; -- call recv_byte
 168         when "0101010" => data_out <= x"e508a000"; -- lls r1, r1, 8
 169         when "0101011" => data_out <= x"e3080800"; -- or r1, r0, r1
 170         when "0101100" => data_out <= x"eb7ff885"; -- call recv_byte
 171         when "0101101" => data_out <= x"e508a000"; -- lls r1, r1, 8
 172         when "0101110" => data_out <= x"e3080800"; -- or r1, r0, r1
 173         when "0101111" => data_out <= x"e1008000"; -- addi r0, r1, 0
 174         when "0110000" => data_out <= x"eb000008"; -- ret
 175         when "0110001" => data_out <= x"eb7ff605"; -- call recv_byte
 176         when "0110010" => data_out <= x"eb001701"; -- br tehend
 177         when "0110011" => data_out <= x"e4088800"; -- xor r1, r1, r1
 178         when "0110100" => data_out <= x"ec8002b8"; -- cmpi r0, 0x57
 179         when "0110101" => data_out <= x"1b000681"; -- breq- bt_W
 180         when "0110110" => data_out <= x"ec800290"; -- cmpi r0, 0x52
 181         when "0110111" => data_out <= x"1b000901"; -- breq- bt_R
 182         when "0111000" => data_out <= x"ec800288"; -- cmpi r0, 0x51
 183         when "0111001" => data_out <= x"1b000b81"; -- breq- bt_Q
 184         when "0111010" => data_out <= x"ec8002a0"; -- cmpi r0, 0x54
 185         when "0111011" => data_out <= x"1b000e01"; -- breq- bt_T
 186         when "0111100" => data_out <= x"ec800250"; -- cmpi r0, 0x4a
 187         when "0111101" => data_out <= x"1b001081"; -- breq- bt_J
 188         when "0111110" => data_out <= x"ed080278"; -- ldi r1, 0x4f
 189         when "0111111" => data_out <= x"eb7fe805"; -- call send_byte
 190         when "1000000" => data_out <= x"eb7fe785"; -- call send_byte
 191         when "1000001" => data_out <= x"eb7ff801"; -- br bootrom
 192         when "1000010" => data_out <= x"eb7ff085"; -- call recv_word
 193         when "1000011" => data_out <= x"e7858004"; -- stw r0, PADDR(r11)
 194         when "1000100" => data_out <= x"eb7fef85"; -- call recv_word
 195         when "1000101" => data_out <= x"e7858008"; -- stw r0, PDATA(r11)
 196         when "1000110" => data_out <= x"ed080220"; -- ldi r1, 0x44
 197         when "1000111" => data_out <= x"eb7fe405"; -- call send_byte
 198         when "1001000" => data_out <= x"eb7ff481"; -- br bootrom
 199         when "1001001" => data_out <= x"eb7fed05"; -- call recv_word
 200         when "1001010" => data_out <= x"e1100000"; -- mov r2, r0
 201         when "1001011" => data_out <= x"ed080230"; -- ldi r1, 0x46
 202         when "1001100" => data_out <= x"eb7fe185"; -- call send_byte
 203         when "1001101" => data_out <= x"ea090000"; -- ldx r1, 0(r2)
 204         when "1001110" => data_out <= x"eb7fe305"; -- call send_word
 205         when "1001111" => data_out <= x"eb7ff101"; -- br bootrom
 206         when "1010000" => data_out <= x"eb7fe985"; -- call recv_word
 207         when "1010001" => data_out <= x"e1300000"; -- mov r6, r0
 208         when "1010010" => data_out <= x"eb7fe885"; -- call recv_word
 209         when "1010011" => data_out <= x"e7830000"; -- stw r0, 0(r6)
 210         when "1010100" => data_out <= x"ed080208"; -- ldi r1, 0x41
 211         when "1010101" => data_out <= x"eb7fdd05"; -- call send_byte
 212         when "1010110" => data_out <= x"eb7fed81"; -- br bootrom
 213         when "1010111" => data_out <= x"eb7fe605"; -- call recv_word
 214         when "1011000" => data_out <= x"e1100000"; -- mov r2, r0
 215         when "1011001" => data_out <= x"ed080238"; -- ldi r1, 0x47
 216         when "1011010" => data_out <= x"eb7fda85"; -- call send_byte
 217         when "1011011" => data_out <= x"e7090000"; -- ldw r1, 0(r2)
 218         when "1011100" => data_out <= x"eb7fdc05"; -- call send_word
 219         when "1011101" => data_out <= x"eb7fea01"; -- br bootrom
 220         when "1011110" => data_out <= x"eb7fe285"; -- call recv_word
 221         when "1011111" => data_out <= x"eb800000"; -- brr r0
 222         -- just nop until rom end!
 223         when others => data_out <= x"fd000000";
 224                         end case;
 225                 end if;
 226         end process;
 227
 228         vsim_bug(6 downto 0) <= rd_addr;
 229         vsim_bug(31 downto 7) <= (others => '0');
 230 end architecture behaviour;