fpga/ps2_kbd.v

   1 `timescale 1ns / 100ps
   2
   3 /*
   4  * PS2 Keyboard to Mac interface module
   5  */
   6 module ps2_kbd( input                   sysclk,
   7                 input                   reset,
   8
   9                 inout                   ps2dat,
  10                 inout                   ps2clk,
  11
  12                 input [7:0]             data_out,
  13                 input                   strobe_out,
  14
  15                 output [7:0]            data_in,
  16                 output                  strobe_in,
  17
  18                 output reg [15:0]       debug
  19 );
  20
  21         reg [8:0]               keymac;
  22         reg                     key_pending;
  23         reg [21:0]              pacetimer;
  24         reg                     inquiry_active;
  25         reg                     extended;
  26         reg                     keybreak;
  27         reg                     capslock;
  28         reg                     haskey;
  29         wire                    got_key;
  30         wire                    got_break;
  31         wire                    got_extend;
  32         wire                    tick_short;
  33         wire                    tick_long;
  34         wire                    pop_key;
  35         reg                     cmd_inquiry;
  36         reg                     cmd_instant;
  37         reg                     cmd_model;
  38         reg                     cmd_test;
  39         reg[1:0]                state;
  40         reg[1:0]                next;
  41         reg                     nreq;
  42         reg[7:0]                nbyte;
  43
  44         /* PS2 interface signals */
  45         wire                    istrobe;
  46         wire [7:0]              ibyte;
  47         reg                     oreq;
  48         reg [7:0]               obyte;
  49         wire                    oack;
  50         wire                    timeout;
  51         wire [1:0]              dbg_lowstate;
  52
  53         ps2 ps20(.sysclk(sysclk),
  54                  .reset(reset),
  55                  .ps2dat(ps2dat),
  56                  .ps2clk(ps2clk),
  57                  .istrobe(istrobe),
  58                  .ibyte(ibyte),
  59                  .oreq(oreq),
  60                  .obyte(obyte),
  61                  .oack(oack),
  62                  .timeout(timeout),
  63                  .dbg_state(dbg_lowstate));
  64
  65         /* --- PS2 side State machine ---
  66          *
  67          *  - at state_init: wait for BAT reply
  68          *     * 0xaa      -> send 0xed -> state_led1
  69          *     * bad reply -> send 0xff -> state_init
  70          *     * timeout   -> send 0xff -> state_init
  71          *
  72          *  - at state_led1: wait for ack, send LED state
  73          *     * 0xfa      -> send 0xYY -> state_led2 YY=LED
  74          *     * bad reply -> send 0xff -> state_init
  75          *     * timeout   -> send 0xff -> state_init
  76          *
  77          *  - at state_led2: wait for ack, go wait data
  78          *     * 0xfa                   -> state_wait
  79          *     * bad reply -> send 0xff -> state_init
  80          *     * timeout   -> send 0xff -> state_init
  81          *
  82          *  - at state_wait: wait for data byte
  83          *     * capslock  -> send 0xed -> state_led1
  84          *     * other                  -> state_wait
  85          *
  86          * Works fine with my logitech USB/PS2 keyboard, but fails
  87          * miserably with an old HP PS2 keyboard (which also behaves
  88          * oddly with minimig as an amiga). Will eventually investigate...
  89          */
  90         localparam ps2k_state_init      = 0;
  91         localparam ps2k_state_led1      = 1;
  92         localparam ps2k_state_led2      = 2;
  93         localparam ps2k_state_wait      = 3;
  94
  95
  96         /* Unlike my other modules, here I'll play with a big fat
  97          * combo logic. The outputs are:
  98          *  - oreq   : triggers sending of a byte. Set based on either
  99          *             timeout or istrobe, and as such only set for a
 100          *             clock.
 101          *  - next   : next state
 102          *  - obyte  : next byte to send
 103          */
 104         always@(timeout or state or istrobe or ibyte or capslock) begin
 105                 nreq = 0;
 106                 next = state;
 107                 nbyte = 8'hff;
 108
 109                 if (istrobe || timeout)
 110                   case(state)
 111                           ps2k_state_init: begin
 112                                   if (istrobe && ibyte == 8'haa) begin
 113                                           nbyte = 8'hed;
 114                                           nreq = 1;
 115                                           next = ps2k_state_led1;
 116                                   end else if (ibyte != 8'hfa)
 117                                     nreq = 1;
 118                           end
 119                           ps2k_state_led1: begin
 120                                   nreq = 1;
 121                                   if (istrobe && ibyte == 8'hfa) begin
 122                                           nbyte = { 5'b00000, capslock, 1'b1, 1'b0 };
 123                                           next = ps2k_state_led2;
 124                                   end else
 125                                     next = ps2k_state_init;
 126                           end
 127                           ps2k_state_led2: begin
 128                                   if (istrobe && ibyte == 8'hfa)
 129                                     next = ps2k_state_wait;
 130                                   else begin
 131                                           nreq = 1;
 132                                           next = ps2k_state_init;
 133                                   end
 134                           end
 135                           ps2k_state_wait: begin
 136                                   /* Update LEDs */
 137                                   if (istrobe && ibyte == 8'h58) begin
 138                                           nbyte = 8'hed;
 139                                           nreq = 1;
 140                                           next = ps2k_state_led1;
 141                                   end
 142                           end
 143                   endcase
 144         end
 145
 146         /* State related latches. We latch oreq and obyte, we don't
 147          * necessarily have to but that avoids back to back
 148          * receive/send at the low level which can upset things
 149          */
 150         always@(posedge sysclk or posedge reset)
 151           if (reset)
 152             state <= ps2k_state_init;
 153           else
 154             state <= next;
 155         always@(posedge sysclk or posedge reset)
 156           if (reset)
 157             oreq <= 0;
 158           else
 159             oreq <= nreq;
 160         always@(posedge sysclk or posedge reset)
 161           if (reset)
 162             obyte <= 0;
 163           else
 164             obyte <= nbyte;
 165
 166         assign got_key = (state == ps2k_state_wait) && istrobe;
 167         assign got_break = { ibyte[7:1], 1'b0 } == 8'hf0;
 168         assign got_extend = { ibyte[7:1], 1'b0 } == 8'he0;
 169
 170         /* Latch key info from PS2, handle capslock state */
 171         always@(posedge sysclk or posedge reset)
 172           if (reset) begin
 173                   extended <= 0;
 174                   keybreak <= 0;
 175                   capslock <= 0;
 176           end else if (got_key) begin
 177                   if (got_break)
 178                     keybreak <= 1;
 179                   else if (got_extend)
 180                     extended <= 1;
 181                   else begin
 182                           keybreak <= 0;
 183                           extended <= 0;
 184
 185                           /* Capslock handling */
 186                           if (ibyte == 8'h58 && !keybreak)
 187                             capslock <= ~capslock;
 188                   end
 189           end
 190
 191         /* --- Mac side --- */
 192
 193         /* Latch commands from Mac */
 194         always@(posedge sysclk or posedge reset)
 195           if (reset) begin
 196                   cmd_inquiry <= 0;
 197                   cmd_instant <= 0;
 198                   cmd_model <= 0;
 199                   cmd_test <= 0;
 200           end else begin
 201                   if (strobe_out) begin
 202                           cmd_inquiry <= 0;
 203                           cmd_instant <= 0;
 204                           cmd_model <= 0;
 205                           cmd_test <= 0;
 206                           case(data_out)
 207                                   8'h10: cmd_inquiry <= 1;
 208                                   8'h14: cmd_instant <= 1;
 209                                   8'h16: cmd_model   <= 1;
 210                                   8'h36: cmd_test    <= 1;
 211                           endcase
 212                   end
 213           end
 214
 215         /* Divide our clock to pace our responses to the Mac. tick_short ticks
 216          * when we can respond to a command, and tick_long ticks when an inquiry
 217          * command shall timeout
 218          */
 219         always@(posedge sysclk or posedge reset)
 220           if (reset)
 221             pacetimer <= 0;
 222           else begin
 223                   /* reset counter on command from Mac */
 224                   if (strobe_out)
 225                     pacetimer <= 0;
 226                   else if (!tick_long)
 227                     pacetimer <= pacetimer + 1;
 228           end
 229         assign tick_long  = pacetimer == 22'h3fffff;
 230         assign tick_short = pacetimer == 22'h000fff;
 231
 232         /* Delay inquiry responses to after tick_short */
 233         always@(posedge sysclk or posedge reset)
 234           if (reset)
 235             inquiry_active <= 0;
 236           else begin
 237                   if (strobe_out | strobe_in)
 238                     inquiry_active <= 0;
 239                   else if (tick_short)
 240                     inquiry_active <= cmd_inquiry;
 241           end
 242
 243         /* Key answer to the mac XXX FIXME: keypad */
 244         assign pop_key = (cmd_instant & tick_short) |
 245                          (inquiry_active & tick_long) |
 246                          (inquiry_active & key_pending);
 247
 248         /* Reply to Mac */
 249         assign strobe_in = ((cmd_model | cmd_test) & tick_short) | pop_key;
 250
 251         /* Latch key_pending */
 252         always @(posedge sysclk or posedge reset)
 253           if (reset)
 254             key_pending <= 0;
 255           else begin
 256                   if (pop_key | cmd_model | cmd_test)
 257                     key_pending <= 0;
 258                   else if (!key_pending & got_key && !got_break && !got_extend)
 259                     key_pending <= 1;
 260           end
 261
 262         /* Data to Mac ... XXX: Handle keypad and special case capslock */
 263         assign data_in = cmd_test       ? 8'h7d :
 264                          cmd_model      ? 8'h03 :
 265                          key_pending    ? keymac[7:0] : 8'h7b;
 266
 267         /* Keymap. XXX add option to assign ctrl/alt/windows to cmd/option
 268          * differently
 269          */
 270         always @(posedge sysclk)
 271           if (got_key && !key_pending) begin
 272                   case({extended,ibyte}) // Scan Code Set 2
 273                           9'h000:               keymac[8:0] <= 9'h07b;
 274                           9'h001:               keymac[8:0] <= 9'h07b;  //F9
 275                           9'h002:               keymac[8:0] <= 9'h07b;
 276                           9'h003:               keymac[8:0] <= 9'h07b;  //F5
 277                           9'h004:               keymac[8:0] <= 9'h07b;  //F3
 278                           9'h005:               keymac[8:0] <= 9'h07b;  //F1
 279                           9'h006:               keymac[8:0] <= 9'h07b;  //F2
 280                           9'h007:               keymac[8:0] <= 9'h07b;  //F12 <OSD>
 281                           9'h008:               keymac[8:0] <= 9'h07b;
 282                           9'h009:               keymac[8:0] <= 9'h07b;  //F10
 283                           9'h00a:               keymac[8:0] <= 9'h07b;  //F8
 284                           9'h00b:               keymac[8:0] <= 9'h07b;  //F6
 285                           9'h00c:               keymac[8:0] <= 9'h07b;  //F4
 286                           9'h00d:               keymac[8:0] <= 9'h061;  //TAB
 287                           9'h00e:               keymac[8:0] <= 9'h065;  //~ (`)
 288                           9'h00f:               keymac[8:0] <= 9'h07b;
 289                           9'h010:               keymac[8:0] <= 9'h07b;
 290                           9'h011:               keymac[8:0] <= 9'h075;  //LEFT ALT (option)
 291                           9'h012:               keymac[8:0] <= 9'h071;  //LEFT SHIFT
 292                           9'h013:               keymac[8:0] <= 9'h07b;
 293                           9'h014:               keymac[8:0] <= 9'h06f;  //CTRL (command)
 294                           9'h015:               keymac[8:0] <= 9'h019;  //q
 295                           9'h016:               keymac[8:0] <= 9'h025;  //1
 296                           9'h017:               keymac[8:0] <= 9'h07b;
 297                           9'h018:               keymac[8:0] <= 9'h07b;
 298                           9'h019:               keymac[8:0] <= 9'h07b;
 299                           9'h01a:               keymac[8:0] <= 9'h00d;  //z
 300                           9'h01b:               keymac[8:0] <= 9'h003;  //s
 301                           9'h01c:               keymac[8:0] <= 9'h001;  //a
 302                           9'h01d:               keymac[8:0] <= 9'h01b;  //w
 303                           9'h01e:               keymac[8:0] <= 9'h027;  //2
 304                           9'h01f:               keymac[8:0] <= 9'h07b;
 305                           9'h020:               keymac[8:0] <= 9'h07b;
 306                           9'h021:               keymac[8:0] <= 9'h011;  //c
 307                           9'h022:               keymac[8:0] <= 9'h00f;  //x
 308                           9'h023:               keymac[8:0] <= 9'h005;  //d
 309                           9'h024:               keymac[8:0] <= 9'h01d;  //e
 310                           9'h025:               keymac[8:0] <= 9'h02b;  //4
 311                           9'h026:               keymac[8:0] <= 9'h029;  //3
 312                           9'h027:               keymac[8:0] <= 9'h07b;
 313                           9'h028:               keymac[8:0] <= 9'h07b;
 314                           9'h029:               keymac[8:0] <= 9'h063;  //SPACE
 315                           9'h02a:               keymac[8:0] <= 9'h013;  //v
 316                           9'h02b:               keymac[8:0] <= 9'h007;  //f
 317                           9'h02c:               keymac[8:0] <= 9'h023;  //t
 318                           9'h02d:               keymac[8:0] <= 9'h01f;  //r
 319                           9'h02e:               keymac[8:0] <= 9'h02f;  //5
 320                           9'h02f:               keymac[8:0] <= 9'h07b;
 321                           9'h030:               keymac[8:0] <= 9'h07b;
 322                           9'h031:               keymac[8:0] <= 9'h05b;  //n
 323                           9'h032:               keymac[8:0] <= 9'h017;  //b
 324                           9'h033:               keymac[8:0] <= 9'h009;  //h
 325                           9'h034:               keymac[8:0] <= 9'h00b;  //g
 326                           9'h035:               keymac[8:0] <= 9'h021;  //y
 327                           9'h036:               keymac[8:0] <= 9'h02d;  //6
 328                           9'h037:               keymac[8:0] <= 9'h07b;
 329                           9'h038:               keymac[8:0] <= 9'h07b;
 330                           9'h039:               keymac[8:0] <= 9'h07b;
 331                           9'h03a:               keymac[8:0] <= 9'h05d;  //m
 332                           9'h03b:               keymac[8:0] <= 9'h04d;  //j
 333                           9'h03c:               keymac[8:0] <= 9'h041;  //u
 334                           9'h03d:               keymac[8:0] <= 9'h035;  //7
 335                           9'h03e:               keymac[8:0] <= 9'h039;  //8
 336                           9'h03f:               keymac[8:0] <= 9'h07b;
 337                           9'h040:               keymac[8:0] <= 9'h07b;
 338                           9'h041:               keymac[8:0] <= 9'h057;  //<,
 339                           9'h042:               keymac[8:0] <= 9'h051;  //k
 340                           9'h043:               keymac[8:0] <= 9'h045;  //i
 341                           9'h044:               keymac[8:0] <= 9'h03f;  //o
 342                           9'h045:               keymac[8:0] <= 9'h03b;  //0
 343                           9'h046:               keymac[8:0] <= 9'h033;  //9
 344                           9'h047:               keymac[8:0] <= 9'h07b;
 345                           9'h048:               keymac[8:0] <= 9'h07b;
 346                           9'h049:               keymac[8:0] <= 9'h05f;  //>.
 347                           9'h04a:               keymac[8:0] <= 9'h059;  //FORWARD SLASH
 348                           9'h04b:               keymac[8:0] <= 9'h04b;  //l
 349                           9'h04c:               keymac[8:0] <= 9'h053;  //;
 350                           9'h04d:               keymac[8:0] <= 9'h047;  //p
 351                           9'h04e:               keymac[8:0] <= 9'h037;  //-
 352                           9'h04f:               keymac[8:0] <= 9'h07b;
 353                           9'h050:               keymac[8:0] <= 9'h07b;
 354                           9'h051:               keymac[8:0] <= 9'h07b;
 355                           9'h052:               keymac[8:0] <= 9'h04f;  //'"
 356                           9'h053:               keymac[8:0] <= 9'h07b;
 357                           9'h054:               keymac[8:0] <= 9'h043;  //[
 358                           9'h055:               keymac[8:0] <= 9'h031;  // =
 359                           9'h056:               keymac[8:0] <= 9'h07b;
 360                           9'h057:               keymac[8:0] <= 9'h07b;
 361                           9'h058:               keymac[8:0] <= 9'h073;  //CAPSLOCK
 362                           9'h059:               keymac[8:0] <= 9'h071;  //RIGHT SHIFT
 363                           9'h05a:               keymac[8:0] <= 9'h049;  //ENTER
 364                           9'h05b:               keymac[8:0] <= 9'h03d;  //]
 365                           9'h05c:               keymac[8:0] <= 9'h07b;
 366                           9'h05d:               keymac[8:0] <= 9'h055;  //BACKSLASH
 367                           9'h05e:               keymac[8:0] <= 9'h07b;
 368                           9'h05f:               keymac[8:0] <= 9'h07b;
 369                           9'h060:               keymac[8:0] <= 9'h07b;
 370                           9'h061:               keymac[8:0] <= 9'h071;  //international left shift cut out (German '<>' key), 0x56 Set#1 code
 371                           9'h062:               keymac[8:0] <= 9'h07b;
 372                           9'h063:               keymac[8:0] <= 9'h07b;
 373                           9'h064:               keymac[8:0] <= 9'h07b;
 374                           9'h065:               keymac[8:0] <= 9'h07b;
 375                           9'h066:               keymac[8:0] <= 9'h067;  //BACKSPACE
 376                           9'h067:               keymac[8:0] <= 9'h07b;
 377                           9'h068:               keymac[8:0] <= 9'h07b;
 378                           9'h069:               keymac[8:0] <= 9'h127;  //KP 1
 379                           9'h06a:               keymac[8:0] <= 9'h07b;
 380                           9'h06b:               keymac[8:0] <= 9'h12d;  //KP 4
 381                           9'h06c:               keymac[8:0] <= 9'h133;  //KP 7
 382                           9'h06d:               keymac[8:0] <= 9'h07b;
 383                           9'h06e:               keymac[8:0] <= 9'h07b;
 384                           9'h06f:               keymac[8:0] <= 9'h07b;
 385                           9'h070:               keymac[8:0] <= 9'h125;  //KP 0
 386                           9'h071:               keymac[8:0] <= 9'h103;  //KP .
 387                           9'h072:               keymac[8:0] <= 9'h129;  //KP 2
 388                           9'h073:               keymac[8:0] <= 9'h12f;  //KP 5
 389                           9'h074:               keymac[8:0] <= 9'h131;  //KP 6
 390                           9'h075:               keymac[8:0] <= 9'h137;  //KP 8
 391                           9'h076:               keymac[8:0] <= 9'b000;  //ESCAPE
 392                           9'h077:               keymac[8:0] <= 9'h07b;  //NUMLOCK
 393                           9'h078:               keymac[8:0] <= 9'h07b;  //F11 <OSD>
 394                           9'h079:               keymac[8:0] <= 9'h07b;  //KP +
 395                           9'h07a:               keymac[8:0] <= 9'h12b;  //KP 3
 396                           9'h07b:               keymac[8:0] <= 9'h11d;  //KP -
 397                           9'h07c:               keymac[8:0] <= 9'h07b;  //KP *
 398                           9'h07d:               keymac[8:0] <= 9'h139;  //KP 9
 399                           9'h07e:               keymac[8:0] <= 9'h07b;  //SCROLL LOCK / KP )
 400                           9'h07f:               keymac[8:0] <= 9'h07b;
 401                           9'h080:               keymac[8:0] <= 9'h07b;
 402                           9'h081:               keymac[8:0] <= 9'h07b;
 403                           9'h082:               keymac[8:0] <= 9'h07b;
 404                           9'h083:               keymac[8:0] <= 9'h07b;  //F7
 405                           9'h084:               keymac[8:0] <= 9'h07b;
 406                           9'h085:               keymac[8:0] <= 9'h07b;
 407                           9'h086:               keymac[8:0] <= 9'h07b;
 408                           9'h087:               keymac[8:0] <= 9'h07b;
 409                           9'h088:               keymac[8:0] <= 9'h07b;
 410                           9'h089:               keymac[8:0] <= 9'h07b;
 411                           9'h08a:               keymac[8:0] <= 9'h07b;
 412                           9'h08b:               keymac[8:0] <= 9'h07b;
 413                           9'h08c:               keymac[8:0] <= 9'h07b;
 414                           9'h08d:               keymac[8:0] <= 9'h07b;
 415                           9'h08e:               keymac[8:0] <= 9'h07b;
 416                           9'h08f:               keymac[8:0] <= 9'h07b;
 417                           9'h090:               keymac[8:0] <= 9'h07b;
 418                           9'h091:               keymac[8:0] <= 9'h07b;
 419                           9'h092:               keymac[8:0] <= 9'h07b;
 420                           9'h093:               keymac[8:0] <= 9'h07b;
 421                           9'h094:               keymac[8:0] <= 9'h07b;
 422                           9'h095:               keymac[8:0] <= 9'h07b;
 423                           9'h096:               keymac[8:0] <= 9'h07b;
 424                           9'h097:               keymac[8:0] <= 9'h07b;
 425                           9'h098:               keymac[8:0] <= 9'h07b;
 426                           9'h099:               keymac[8:0] <= 9'h07b;
 427                           9'h09a:               keymac[8:0] <= 9'h07b;
 428                           9'h09b:               keymac[8:0] <= 9'h07b;
 429                           9'h09c:               keymac[8:0] <= 9'h07b;
 430                           9'h09d:               keymac[8:0] <= 9'h07b;
 431                           9'h09e:               keymac[8:0] <= 9'h07b;
 432                           9'h09f:               keymac[8:0] <= 9'h07b;
 433                           9'h0a0:               keymac[8:0] <= 9'h07b;
 434                           9'h0a1:               keymac[8:0] <= 9'h07b;
 435                           9'h0a2:               keymac[8:0] <= 9'h07b;
 436                           9'h0a3:               keymac[8:0] <= 9'h07b;
 437                           9'h0a4:               keymac[8:0] <= 9'h07b;
 438                           9'h0a5:               keymac[8:0] <= 9'h07b;
 439                           9'h0a6:               keymac[8:0] <= 9'h07b;
 440                           9'h0a7:               keymac[8:0] <= 9'h07b;
 441                           9'h0a8:               keymac[8:0] <= 9'h07b;
 442                           9'h0a9:               keymac[8:0] <= 9'h07b;
 443                           9'h0aa:               keymac[8:0] <= 9'h07b;
 444                           9'h0ab:               keymac[8:0] <= 9'h07b;
 445                           9'h0ac:               keymac[8:0] <= 9'h07b;
 446                           9'h0ad:               keymac[8:0] <= 9'h07b;
 447                           9'h0ae:               keymac[8:0] <= 9'h07b;
 448                           9'h0af:               keymac[8:0] <= 9'h07b;
 449                           9'h0b0:               keymac[8:0] <= 9'h07b;
 450                           9'h0b1:               keymac[8:0] <= 9'h07b;
 451                           9'h0b2:               keymac[8:0] <= 9'h07b;
 452                           9'h0b3:               keymac[8:0] <= 9'h07b;
 453                           9'h0b4:               keymac[8:0] <= 9'h07b;
 454                           9'h0b5:               keymac[8:0] <= 9'h07b;
 455                           9'h0b6:               keymac[8:0] <= 9'h07b;
 456                           9'h0b7:               keymac[8:0] <= 9'h07b;
 457                           9'h0b8:               keymac[8:0] <= 9'h07b;
 458                           9'h0b9:               keymac[8:0] <= 9'h07b;
 459                           9'h0ba:               keymac[8:0] <= 9'h07b;
 460                           9'h0bb:               keymac[8:0] <= 9'h07b;
 461                           9'h0bc:               keymac[8:0] <= 9'h07b;
 462                           9'h0bd:               keymac[8:0] <= 9'h07b;
 463                           9'h0be:               keymac[8:0] <= 9'h07b;
 464                           9'h0bf:               keymac[8:0] <= 9'h07b;
 465                           9'h0c0:               keymac[8:0] <= 9'h07b;
 466                           9'h0c1:               keymac[8:0] <= 9'h07b;
 467                           9'h0c2:               keymac[8:0] <= 9'h07b;
 468                           9'h0c3:               keymac[8:0] <= 9'h07b;
 469                           9'h0c4:               keymac[8:0] <= 9'h07b;
 470                           9'h0c5:               keymac[8:0] <= 9'h07b;
 471                           9'h0c6:               keymac[8:0] <= 9'h07b;
 472                           9'h0c7:               keymac[8:0] <= 9'h07b;
 473                           9'h0c8:               keymac[8:0] <= 9'h07b;
 474                           9'h0c9:               keymac[8:0] <= 9'h07b;
 475                           9'h0ca:               keymac[8:0] <= 9'h07b;
 476                           9'h0cb:               keymac[8:0] <= 9'h07b;
 477                           9'h0cc:               keymac[8:0] <= 9'h07b;
 478                           9'h0cd:               keymac[8:0] <= 9'h07b;
 479                           9'h0ce:               keymac[8:0] <= 9'h07b;
 480                           9'h0cf:               keymac[8:0] <= 9'h07b;
 481                           9'h0d0:               keymac[8:0] <= 9'h07b;
 482                           9'h0d1:               keymac[8:0] <= 9'h07b;
 483                           9'h0d2:               keymac[8:0] <= 9'h07b;
 484                           9'h0d3:               keymac[8:0] <= 9'h07b;
 485                           9'h0d4:               keymac[8:0] <= 9'h07b;
 486                           9'h0d5:               keymac[8:0] <= 9'h07b;
 487                           9'h0d6:               keymac[8:0] <= 9'h07b;
 488                           9'h0d7:               keymac[8:0] <= 9'h07b;
 489                           9'h0d8:               keymac[8:0] <= 9'h07b;
 490                           9'h0d9:               keymac[8:0] <= 9'h07b;
 491                           9'h0da:               keymac[8:0] <= 9'h07b;
 492                           9'h0db:               keymac[8:0] <= 9'h07b;
 493                           9'h0dc:               keymac[8:0] <= 9'h07b;
 494                           9'h0dd:               keymac[8:0] <= 9'h07b;
 495                           9'h0de:               keymac[8:0] <= 9'h07b;
 496                           9'h0df:               keymac[8:0] <= 9'h07b;
 497                           9'h0e0:               keymac[8:0] <= 9'h07b;  //ps2 extended key
 498                           9'h0e1:               keymac[8:0] <= 9'h07b;
 499                           9'h0e2:               keymac[8:0] <= 9'h07b;
 500                           9'h0e3:               keymac[8:0] <= 9'h07b;
 501                           9'h0e4:               keymac[8:0] <= 9'h07b;
 502                           9'h0e5:               keymac[8:0] <= 9'h07b;
 503                           9'h0e6:               keymac[8:0] <= 9'h07b;
 504                           9'h0e7:               keymac[8:0] <= 9'h07b;
 505                           9'h0e8:               keymac[8:0] <= 9'h07b;
 506                           9'h0e9:               keymac[8:0] <= 9'h07b;
 507                           9'h0ea:               keymac[8:0] <= 9'h07b;
 508                           9'h0eb:               keymac[8:0] <= 9'h07b;
 509                           9'h0ec:               keymac[8:0] <= 9'h07b;
 510                           9'h0ed:               keymac[8:0] <= 9'h07b;
 511                           9'h0ee:               keymac[8:0] <= 9'h07b;
 512                           9'h0ef:               keymac[8:0] <= 9'h07b;
 513                           9'h0f0:               keymac[8:0] <= 9'h07b;  //ps2 release code
 514                           9'h0f1:               keymac[8:0] <= 9'h07b;
 515                           9'h0f2:               keymac[8:0] <= 9'h07b;
 516                           9'h0f3:               keymac[8:0] <= 9'h07b;
 517                           9'h0f4:               keymac[8:0] <= 9'h07b;
 518                           9'h0f5:               keymac[8:0] <= 9'h07b;
 519                           9'h0f6:               keymac[8:0] <= 9'h07b;
 520                           9'h0f7:               keymac[8:0] <= 9'h07b;
 521                           9'h0f8:               keymac[8:0] <= 9'h07b;
 522                           9'h0f9:               keymac[8:0] <= 9'h07b;
 523                           9'h0fa:               keymac[8:0] <= 9'h07b;  //ps2 ack code
 524                           9'h0fb:               keymac[8:0] <= 9'h07b;
 525                           9'h0fc:               keymac[8:0] <= 9'h07b;
 526                           9'h0fd:               keymac[8:0] <= 9'h07b;
 527                           9'h0fe:               keymac[8:0] <= 9'h07b;
 528                           9'h0ff:               keymac[8:0] <= 9'h07b;
 529                           9'h100:               keymac[8:0] <= 9'h07b;
 530                           9'h101:               keymac[8:0] <= 9'h07b;
 531                           9'h102:               keymac[8:0] <= 9'h07b;
 532                           9'h103:               keymac[8:0] <= 9'h07b;
 533                           9'h104:               keymac[8:0] <= 9'h07b;
 534                           9'h105:               keymac[8:0] <= 9'h07b;
 535                           9'h106:               keymac[8:0] <= 9'h07b;
 536                           9'h107:               keymac[8:0] <= 9'h07b;
 537                           9'h108:               keymac[8:0] <= 9'h07b;
 538                           9'h109:               keymac[8:0] <= 9'h07b;
 539                           9'h10a:               keymac[8:0] <= 9'h07b;
 540                           9'h10b:               keymac[8:0] <= 9'h07b;
 541                           9'h10c:               keymac[8:0] <= 9'h07b;
 542                           9'h10d:               keymac[8:0] <= 9'h07b;
 543                           9'h10e:               keymac[8:0] <= 9'h07b;
 544                           9'h10f:               keymac[8:0] <= 9'h07b;
 545                           9'h110:               keymac[8:0] <= 9'h07b;
 546                           9'h111:               keymac[8:0] <= 9'h075;  //RIGHT ALT
 547                           9'h112:               keymac[8:0] <= 9'h07b;
 548                           9'h113:               keymac[8:0] <= 9'h07b;
 549                           9'h114:               keymac[8:0] <= 9'h07b;
 550                           9'h115:               keymac[8:0] <= 9'h07b;
 551                           9'h116:               keymac[8:0] <= 9'h07b;
 552                           9'h117:               keymac[8:0] <= 9'h07b;
 553                           9'h118:               keymac[8:0] <= 9'h07b;
 554                           9'h119:               keymac[8:0] <= 9'h07b;
 555                           9'h11a:               keymac[8:0] <= 9'h07b;
 556                           9'h11b:               keymac[8:0] <= 9'h07b;
 557                           9'h11c:               keymac[8:0] <= 9'h07b;
 558                           9'h11d:               keymac[8:0] <= 9'h07b;
 559                           9'h11e:               keymac[8:0] <= 9'h07b;
 560                           9'h11f:               keymac[8:0] <= 9'h06f;  //LEFT COMMAND (LEFT GUI)
 561                           9'h120:               keymac[8:0] <= 9'h07b;
 562                           9'h121:               keymac[8:0] <= 9'h07b;
 563                           9'h122:               keymac[8:0] <= 9'h07b;
 564                           9'h123:               keymac[8:0] <= 9'h07b;
 565                           9'h124:               keymac[8:0] <= 9'h07b;
 566                           9'h125:               keymac[8:0] <= 9'h07b;
 567                           9'h126:               keymac[8:0] <= 9'h07b;
 568                           9'h127:               keymac[8:0] <= 9'h06f;  //RIGHT AMIGA (RIGHT GUI)
 569                           9'h128:               keymac[8:0] <= 9'h07b;
 570                           9'h129:               keymac[8:0] <= 9'h07b;
 571                           9'h12a:               keymac[8:0] <= 9'h07b;
 572                           9'h12b:               keymac[8:0] <= 9'h07b;
 573                           9'h12c:               keymac[8:0] <= 9'h07b;
 574                           9'h12d:               keymac[8:0] <= 9'h07b;
 575                           9'h12e:               keymac[8:0] <= 9'h07b;
 576                           9'h12f:               keymac[8:0] <= 9'h06f;  //RIGHT AMIGA (APPS)
 577                           9'h130:               keymac[8:0] <= 9'h07b;
 578                           9'h131:               keymac[8:0] <= 9'h07b;
 579                           9'h132:               keymac[8:0] <= 9'h07b;
 580                           9'h133:               keymac[8:0] <= 9'h07b;
 581                           9'h134:               keymac[8:0] <= 9'h07b;
 582                           9'h135:               keymac[8:0] <= 9'h07b;
 583                           9'h136:               keymac[8:0] <= 9'h07b;
 584                           9'h137:               keymac[8:0] <= 9'h07b;
 585                           9'h138:               keymac[8:0] <= 9'h07b;
 586                           9'h139:               keymac[8:0] <= 9'h07b;
 587                           9'h13a:               keymac[8:0] <= 9'h07b;
 588                           9'h13b:               keymac[8:0] <= 9'h07b;
 589                           9'h13c:               keymac[8:0] <= 9'h07b;
 590                           9'h13d:               keymac[8:0] <= 9'h07b;
 591                           9'h13e:               keymac[8:0] <= 9'h07b;
 592                           9'h13f:               keymac[8:0] <= 9'h07b;
 593                           9'h140:               keymac[8:0] <= 9'h07b;
 594                           9'h141:               keymac[8:0] <= 9'h07b;
 595                           9'h142:               keymac[8:0] <= 9'h07b;
 596                           9'h143:               keymac[8:0] <= 9'h07b;
 597                           9'h144:               keymac[8:0] <= 9'h07b;
 598                           9'h145:               keymac[8:0] <= 9'h07b;
 599                           9'h146:               keymac[8:0] <= 9'h07b;
 600                           9'h147:               keymac[8:0] <= 9'h07b;
 601                           9'h148:               keymac[8:0] <= 9'h07b;
 602                           9'h149:               keymac[8:0] <= 9'h07b;
 603                           9'h14a:               keymac[8:0] <= 9'h07b;  //KP /
 604                           9'h14b:               keymac[8:0] <= 9'h07b;
 605                           9'h14c:               keymac[8:0] <= 9'h07b;
 606                           9'h14d:               keymac[8:0] <= 9'h07b;
 607                           9'h14e:               keymac[8:0] <= 9'h07b;
 608                           9'h14f:               keymac[8:0] <= 9'h07b;
 609                           9'h150:               keymac[8:0] <= 9'h07b;
 610                           9'h151:               keymac[8:0] <= 9'h07b;
 611                           9'h152:               keymac[8:0] <= 9'h07b;
 612                           9'h153:               keymac[8:0] <= 9'h07b;
 613                           9'h154:               keymac[8:0] <= 9'h07b;
 614                           9'h155:               keymac[8:0] <= 9'h07b;
 615                           9'h156:               keymac[8:0] <= 9'h07b;
 616                           9'h157:               keymac[8:0] <= 9'h07b;
 617                           9'h158:               keymac[8:0] <= 9'h07b;
 618                           9'h159:               keymac[8:0] <= 9'h07b;
 619                           9'h15a:               keymac[8:0] <= 9'h119;  //KP ENTER
 620                           9'h15b:               keymac[8:0] <= 9'h07b;
 621                           9'h15c:               keymac[8:0] <= 9'h07b;
 622                           9'h15d:               keymac[8:0] <= 9'h07b;
 623                           9'h15e:               keymac[8:0] <= 9'h07b;
 624                           9'h15f:               keymac[8:0] <= 9'h07b;
 625                           9'h160:               keymac[8:0] <= 9'h07b;
 626                           9'h161:               keymac[8:0] <= 9'h07b;
 627                           9'h162:               keymac[8:0] <= 9'h07b;
 628                           9'h163:               keymac[8:0] <= 9'h07b;
 629                           9'h164:               keymac[8:0] <= 9'h07b;
 630                           9'h165:               keymac[8:0] <= 9'h07b;
 631                           9'h166:               keymac[8:0] <= 9'h07b;
 632                           9'h167:               keymac[8:0] <= 9'h07b;
 633                           9'h168:               keymac[8:0] <= 9'h07b;
 634                           9'h169:               keymac[8:0] <= 9'h07b;  //END
 635                           9'h16a:               keymac[8:0] <= 9'h07b;
 636                           9'h16b:               keymac[8:0] <= 9'h10d;  //ARROW LEFT
 637                           9'h16c:               keymac[8:0] <= 9'h07b;  //HOME
 638                           9'h16d:               keymac[8:0] <= 9'h07b;
 639                           9'h16e:               keymac[8:0] <= 9'h07b;
 640                           9'h16f:               keymac[8:0] <= 9'h07b;
 641                           9'h170:               keymac[8:0] <= 9'h07b;  //INSERT = HELP
 642                           9'h171:               keymac[8:0] <= 9'h10f;  //DELETE
 643                           9'h172:               keymac[8:0] <= 9'h111;  //ARROW DOWN
 644                           9'h173:               keymac[8:0] <= 9'h07b;
 645                           9'h174:               keymac[8:0] <= 9'h105;  //ARROW RIGHT
 646                           9'h175:               keymac[8:0] <= 9'h10b;  //ARROW UP
 647                           9'h176:               keymac[8:0] <= 9'h07b;
 648                           9'h177:               keymac[8:0] <= 9'h07b;
 649                           9'h178:               keymac[8:0] <= 9'h07b;
 650                           9'h179:               keymac[8:0] <= 9'h07b;
 651                           9'h17a:               keymac[8:0] <= 9'h07b;  //PGDN <OSD>
 652                           9'h17b:               keymac[8:0] <= 9'h07b;
 653                           9'h17c:               keymac[8:0] <= 9'h07b;  //PRTSCR <OSD>
 654                           9'h17d:               keymac[8:0] <= 9'h07b;  //PGUP <OSD>
 655                           9'h17e:               keymac[8:0] <= 9'h07b;  //ctrl+break
 656                           9'h17f:               keymac[8:0] <= 9'h07b;
 657                           9'h180:               keymac[8:0] <= 9'h07b;
 658                           9'h181:               keymac[8:0] <= 9'h07b;
 659                           9'h182:               keymac[8:0] <= 9'h07b;
 660                           9'h183:               keymac[8:0] <= 9'h07b;
 661                           9'h184:               keymac[8:0] <= 9'h07b;
 662                           9'h185:               keymac[8:0] <= 9'h07b;
 663                           9'h186:               keymac[8:0] <= 9'h07b;
 664                           9'h187:               keymac[8:0] <= 9'h07b;
 665                           9'h188:               keymac[8:0] <= 9'h07b;
 666                           9'h189:               keymac[8:0] <= 9'h07b;
 667                           9'h18a:               keymac[8:0] <= 9'h07b;
 668                           9'h18b:               keymac[8:0] <= 9'h07b;
 669                           9'h18c:               keymac[8:0] <= 9'h07b;
 670                           9'h18d:               keymac[8:0] <= 9'h07b;
 671                           9'h18e:               keymac[8:0] <= 9'h07b;
 672                           9'h18f:               keymac[8:0] <= 9'h07b;
 673                           9'h190:               keymac[8:0] <= 9'h07b;
 674                           9'h191:               keymac[8:0] <= 9'h07b;
 675                           9'h192:               keymac[8:0] <= 9'h07b;
 676                           9'h193:               keymac[8:0] <= 9'h07b;
 677                           9'h194:               keymac[8:0] <= 9'h07b;
 678                           9'h195:               keymac[8:0] <= 9'h07b;
 679                           9'h196:               keymac[8:0] <= 9'h07b;
 680                           9'h197:               keymac[8:0] <= 9'h07b;
 681                           9'h198:               keymac[8:0] <= 9'h07b;
 682                           9'h199:               keymac[8:0] <= 9'h07b;
 683                           9'h19a:               keymac[8:0] <= 9'h07b;
 684                           9'h19b:               keymac[8:0] <= 9'h07b;
 685                           9'h19c:               keymac[8:0] <= 9'h07b;
 686                           9'h19d:               keymac[8:0] <= 9'h07b;
 687                           9'h19e:               keymac[8:0] <= 9'h07b;
 688                           9'h19f:               keymac[8:0] <= 9'h07b;
 689                           9'h1a0:               keymac[8:0] <= 9'h07b;
 690                           9'h1a1:               keymac[8:0] <= 9'h07b;
 691                           9'h1a2:               keymac[8:0] <= 9'h07b;
 692                           9'h1a3:               keymac[8:0] <= 9'h07b;
 693                           9'h1a4:               keymac[8:0] <= 9'h07b;
 694                           9'h1a5:               keymac[8:0] <= 9'h07b;
 695                           9'h1a6:               keymac[8:0] <= 9'h07b;
 696                           9'h1a7:               keymac[8:0] <= 9'h07b;
 697                           9'h1a8:               keymac[8:0] <= 9'h07b;
 698                           9'h1a9:               keymac[8:0] <= 9'h07b;
 699                           9'h1aa:               keymac[8:0] <= 9'h07b;
 700                           9'h1ab:               keymac[8:0] <= 9'h07b;
 701                           9'h1ac:               keymac[8:0] <= 9'h07b;
 702                           9'h1ad:               keymac[8:0] <= 9'h07b;
 703                           9'h1ae:               keymac[8:0] <= 9'h07b;
 704                           9'h1af:               keymac[8:0] <= 9'h07b;
 705                           9'h1b0:               keymac[8:0] <= 9'h07b;
 706                           9'h1b1:               keymac[8:0] <= 9'h07b;
 707                           9'h1b2:               keymac[8:0] <= 9'h07b;
 708                           9'h1b3:               keymac[8:0] <= 9'h07b;
 709                           9'h1b4:               keymac[8:0] <= 9'h07b;
 710                           9'h1b5:               keymac[8:0] <= 9'h07b;
 711                           9'h1b6:               keymac[8:0] <= 9'h07b;
 712                           9'h1b7:               keymac[8:0] <= 9'h07b;
 713                           9'h1b8:               keymac[8:0] <= 9'h07b;
 714                           9'h1b9:               keymac[8:0] <= 9'h07b;
 715                           9'h1ba:               keymac[8:0] <= 9'h07b;
 716                           9'h1bb:               keymac[8:0] <= 9'h07b;
 717                           9'h1bc:               keymac[8:0] <= 9'h07b;
 718                           9'h1bd:               keymac[8:0] <= 9'h07b;
 719                           9'h1be:               keymac[8:0] <= 9'h07b;
 720                           9'h1bf:               keymac[8:0] <= 9'h07b;
 721                           9'h1c0:               keymac[8:0] <= 9'h07b;
 722                           9'h1c1:               keymac[8:0] <= 9'h07b;
 723                           9'h1c2:               keymac[8:0] <= 9'h07b;
 724                           9'h1c3:               keymac[8:0] <= 9'h07b;
 725                           9'h1c4:               keymac[8:0] <= 9'h07b;
 726                           9'h1c5:               keymac[8:0] <= 9'h07b;
 727                           9'h1c6:               keymac[8:0] <= 9'h07b;
 728                           9'h1c7:               keymac[8:0] <= 9'h07b;
 729                           9'h1c8:               keymac[8:0] <= 9'h07b;
 730                           9'h1c9:               keymac[8:0] <= 9'h07b;
 731                           9'h1ca:               keymac[8:0] <= 9'h07b;
 732                           9'h1cb:               keymac[8:0] <= 9'h07b;
 733                           9'h1cc:               keymac[8:0] <= 9'h07b;
 734                           9'h1cd:               keymac[8:0] <= 9'h07b;
 735                           9'h1ce:               keymac[8:0] <= 9'h07b;
 736                           9'h1cf:               keymac[8:0] <= 9'h07b;
 737                           9'h1d0:               keymac[8:0] <= 9'h07b;
 738                           9'h1d1:               keymac[8:0] <= 9'h07b;
 739                           9'h1d2:               keymac[8:0] <= 9'h07b;
 740                           9'h1d3:               keymac[8:0] <= 9'h07b;
 741                           9'h1d4:               keymac[8:0] <= 9'h07b;
 742                           9'h1d5:               keymac[8:0] <= 9'h07b;
 743                           9'h1d6:               keymac[8:0] <= 9'h07b;
 744                           9'h1d7:               keymac[8:0] <= 9'h07b;
 745                           9'h1d8:               keymac[8:0] <= 9'h07b;
 746                           9'h1d9:               keymac[8:0] <= 9'h07b;
 747                           9'h1da:               keymac[8:0] <= 9'h07b;
 748                           9'h1db:               keymac[8:0] <= 9'h07b;
 749                           9'h1dc:               keymac[8:0] <= 9'h07b;
 750                           9'h1dd:               keymac[8:0] <= 9'h07b;
 751                           9'h1de:               keymac[8:0] <= 9'h07b;
 752                           9'h1df:               keymac[8:0] <= 9'h07b;
 753                           9'h1e0:               keymac[8:0] <= 9'h07b;  //ps2 extended key(duplicate, see $e0)
 754                           9'h1e1:               keymac[8:0] <= 9'h07b;
 755                           9'h1e2:               keymac[8:0] <= 9'h07b;
 756                           9'h1e3:               keymac[8:0] <= 9'h07b;
 757                           9'h1e4:               keymac[8:0] <= 9'h07b;
 758                           9'h1e5:               keymac[8:0] <= 9'h07b;
 759                           9'h1e6:               keymac[8:0] <= 9'h07b;
 760                           9'h1e7:               keymac[8:0] <= 9'h07b;
 761                           9'h1e8:               keymac[8:0] <= 9'h07b;
 762                           9'h1e9:               keymac[8:0] <= 9'h07b;
 763                           9'h1ea:               keymac[8:0] <= 9'h07b;
 764                           9'h1eb:               keymac[8:0] <= 9'h07b;
 765                           9'h1ec:               keymac[8:0] <= 9'h07b;
 766                           9'h1ed:               keymac[8:0] <= 9'h07b;
 767                           9'h1ee:               keymac[8:0] <= 9'h07b;
 768                           9'h1ef:               keymac[8:0] <= 9'h07b;
 769                           9'h1f0:               keymac[8:0] <= 9'h07b;  //ps2 release code(duplicate, see $f0)
 770                           9'h1f1:               keymac[8:0] <= 9'h07b;
 771                           9'h1f2:               keymac[8:0] <= 9'h07b;
 772                           9'h1f3:               keymac[8:0] <= 9'h07b;
 773                           9'h1f4:               keymac[8:0] <= 9'h07b;
 774                           9'h1f5:               keymac[8:0] <= 9'h07b;
 775                           9'h1f6:               keymac[8:0] <= 9'h07b;
 776                           9'h1f7:               keymac[8:0] <= 9'h07b;
 777                           9'h1f8:               keymac[8:0] <= 9'h07b;
 778                           9'h1f9:               keymac[8:0] <= 9'h07b;
 779                           9'h1fa:               keymac[8:0] <= 9'h07b;  //ps2 ack code(duplicate see $fa)
 780                           9'h1fb:               keymac[8:0] <= 9'h07b;
 781                           9'h1fc:               keymac[8:0] <= 9'h07b;
 782                           9'h1fd:               keymac[8:0] <= 9'h07b;
 783                           9'h1fe:               keymac[8:0] <= 9'h07b;
 784                           9'h1ff:               keymac[8:0] <= 9'h07b;
 785                   endcase // case ({extended,ps2key[7:0]})
 786                   keymac[7] <= keybreak;
 787           end
 788
 789         /* Some debug signals for my own sanity */
 790         always@(posedge sysclk or posedge reset) begin
 791                 if (reset)
 792                   debug <= 0;
 793                 else begin
 794                         if (istrobe)
 795                           debug[15:8] <= ibyte;
 796                         debug[7:0] <= { ps2clk, ps2dat, dbg_lowstate, 2'b0,
 797                                         state };
 798                 end
 799         end
 800 endmodule