-`define OP_NOP 3'd0
-`define OP_LOADA 3'd1
-`define OP_LOADB 3'd2
-`define OP_STORE 3'd3
-`define OP_READ 3'd4
-`define OP_LOADI 3'd5
-`define OP_ROUTE 3'd6
-`define OP_RUG 3'd7
+`include "news.v"
+
+`define OP_NOP 3'd0
+`define OP_LOADA 3'd1
+`define OP_LOADB 3'd2
+`define OP_STORE 3'd3
+`define OP_STOREI 3'd4
+`define OP_LOADI 3'd5
+`define OP_ROUTE 3'd6
+`define OP_LED 3'd7
`define DIRECTION_N 3'd0
`define DIRECTION_NE 3'd1
`define DIRECTION_W 3'd6
`define DIRECTION_NW 3'd7
-module chip(input clk, input [2:0] op, input [15:0] I, input io_pin, input CS, output reg [15:0] mem_in, input [15:0] mem_out, output reg mem_write);
+module chip(input clk, input [2:0] op, input [15:0] I, output reg [15:0] mem_in, input [15:0] mem_out, output reg mem_write, output reg [3:0] led_out = 0);
// parity is unimplemented
wire edge_ = I[7];
wire [3:0] cube = I[11:8];
- // OP_ROUTE
- wire [5:0] cycle = I[5:0];
- wire [1:0] check = I[7:6];
- wire [3:0] xor_ = I[11:8];
- wire [2:0] snarf = I[14:12];
- wire odd = I[15];
-
- // OP_RUG
- wire rw = I[0];
- wire ac = I[1];
- wire news = I[2];
- wire [4:0] reg_ = I[8:4];
+ // OP_LED
+ wire mode = I[4];
+ wire [1:0] offset = I[1:0];
+ wire [3:0] leds = I[3:0];
reg [15:0] A = 0;
reg [7:0] alu_sum = 0;
reg [7:0] alu_carry = 0;
reg [15:0] cube_in;
- reg io;
// these are not really regs
reg [15:0] alu_sum_out;
reg [15:0] alu_carry_out;
- reg [2:0] alu_index [15:0];
+ reg [2:0] alu_index [15:0];
reg [15:0] idx;
end
end
- reg [3:0] newstable[0:15][0:7];
-
- initial begin
- newstable[0][0] = 12;
- newstable[0][1] = 13;
- newstable[0][2] = 1;
- newstable[0][3] = 5;
- newstable[0][4] = 4;
- newstable[0][5] = 7;
- newstable[0][6] = 3;
- newstable[0][7] = 15;
- newstable[1][0] = 13;
- newstable[1][1] = 14;
- newstable[1][2] = 2;
- newstable[1][3] = 6;
- newstable[1][4] = 5;
- newstable[1][5] = 4;
- newstable[1][6] = 0;
- newstable[1][7] = 12;
- newstable[2][0] = 14;
- newstable[2][1] = 15;
- newstable[2][2] = 3;
- newstable[2][3] = 7;
- newstable[2][4] = 6;
- newstable[2][5] = 5;
- newstable[2][6] = 1;
- newstable[2][7] = 13;
- newstable[3][0] = 15;
- newstable[3][1] = 12;
- newstable[3][2] = 0;
- newstable[3][3] = 4;
- newstable[3][4] = 7;
- newstable[3][5] = 6;
- newstable[3][6] = 2;
- newstable[3][7] = 14;
- newstable[4][0] = 0;
- newstable[4][1] = 1;
- newstable[4][2] = 5;
- newstable[4][3] = 9;
- newstable[4][4] = 8;
- newstable[4][5] = 11;
- newstable[4][6] = 7;
- newstable[4][7] = 3;
- newstable[5][0] = 1;
- newstable[5][1] = 2;
- newstable[5][2] = 6;
- newstable[5][3] = 10;
- newstable[5][4] = 9;
- newstable[5][5] = 8;
- newstable[5][6] = 4;
- newstable[5][7] = 0;
- newstable[6][0] = 2;
- newstable[6][1] = 3;
- newstable[6][2] = 7;
- newstable[6][3] = 11;
- newstable[6][4] = 10;
- newstable[6][5] = 9;
- newstable[6][6] = 5;
- newstable[6][7] = 1;
- newstable[7][0] = 3;
- newstable[7][1] = 0;
- newstable[7][2] = 4;
- newstable[7][3] = 8;
- newstable[7][4] = 11;
- newstable[7][5] = 10;
- newstable[7][6] = 6;
- newstable[7][7] = 2;
- newstable[8][0] = 4;
- newstable[8][1] = 5;
- newstable[8][2] = 9;
- newstable[8][3] = 13;
- newstable[8][4] = 12;
- newstable[8][5] = 15;
- newstable[8][6] = 11;
- newstable[8][7] = 7;
- newstable[9][0] = 5;
- newstable[9][1] = 6;
- newstable[9][2] = 10;
- newstable[9][3] = 14;
- newstable[9][4] = 13;
- newstable[9][5] = 12;
- newstable[9][6] = 8;
- newstable[9][7] = 4;
- newstable[10][0] = 6;
- newstable[10][1] = 7;
- newstable[10][2] = 11;
- newstable[10][3] = 15;
- newstable[10][4] = 14;
- newstable[10][5] = 13;
- newstable[10][6] = 9;
- newstable[10][7] = 5;
- newstable[11][0] = 7;
- newstable[11][1] = 4;
- newstable[11][2] = 8;
- newstable[11][3] = 12;
- newstable[11][4] = 15;
- newstable[11][5] = 14;
- newstable[11][6] = 10;
- newstable[11][7] = 6;
- newstable[12][0] = 8;
- newstable[12][1] = 9;
- newstable[12][2] = 13;
- newstable[12][3] = 1;
- newstable[12][4] = 0;
- newstable[12][5] = 3;
- newstable[12][6] = 15;
- newstable[12][7] = 11;
- newstable[13][0] = 9;
- newstable[13][1] = 10;
- newstable[13][2] = 14;
- newstable[13][3] = 2;
- newstable[13][4] = 1;
- newstable[13][5] = 0;
- newstable[13][6] = 12;
- newstable[13][7] = 8;
- newstable[14][0] = 10;
- newstable[14][1] = 11;
- newstable[14][2] = 15;
- newstable[14][3] = 3;
- newstable[14][4] = 2;
- newstable[14][5] = 1;
- newstable[14][6] = 13;
- newstable[14][7] = 9;
- newstable[15][0] = 11;
- newstable[15][1] = 8;
- newstable[15][2] = 12;
- newstable[15][3] = 0;
- newstable[15][4] = 3;
- newstable[15][5] = 2;
- newstable[15][6] = 14;
- newstable[15][7] = 10;
- end // initial begin
-
reg [3:0] flags_addr_latch;
reg [3:0] flags_addr;
RAM #(.ADDRESS_BITS(3)) flags (.clk(clk), .write(flags_write), .addr(flags_addr[2:0]), .in(flags_in), .out(flags_out));
reg [15:0] flag_or_news;
+ reg [15:0] news_out;
- reg [15:0] newsidx;
+ news newspaper (.news_in(latest_news), .direction(flags_addr[2:0]), .news_out(news_out));
- always @* begin
- if(flags_addr[3]) begin // read from news
- for(idx = 0; idx < 16; idx++) begin
- newsidx = newstable[idx][flags_addr[2:0]];
- flag_or_news[idx] = latest_news[newsidx];
- end
- end else begin
- flag_or_news = flags_out;
- end
- end
+ assign flag_or_news = flags_addr[3] ? news_out : flags_out;
always @ (posedge clk) begin
if(mem_write)
F <= flag_or_news;
A <= mem_out;
C <= mem_out;
- io <= io_pin;
if (bsel)
B <= cube_in;
end
mem_write <= 1;
end
- `OP_READ:
+ `OP_STOREI:
begin
- if (CS)
- mem_in <= mem_out;
+ mem_in <= I;
+ mem_write <= 1;
end
-
+/*
`OP_LOADI:
begin
C <= mem_out;
A <= I;
alu_sum <= 8'b11110000; // out of A, B, F, select exactly A
end
+*/
+
+ `OP_LED:
+ begin
+ if(!mode)
+ led_out <= leds;
+ else if(offset == 0)
+ led_out <= mem_out[3:0];
+ else if(offset == 1)
+ led_out <= mem_out[7:4];
+ else if(offset == 2)
+ led_out <= mem_out[11:8];
+ else if(offset == 3)
+ led_out <= mem_out[15:12];
+ end
/* `OP_RUG:
begin
projects / clump.git / blobdiff