Pull the gcram outside the gc

[yule.git] / gc.v

diff --git a/gc.v b/gc.v
index ceae7d7a23ada8d40115ec03879aee6dbd69fff6..d4521783c163d4a006c23b9e40ddecaf692cbf68 100644 (file)
--- a/gc.v
+++ b/gc.v
@@ -1,6 +1,6 @@
 `include "gcram.v"
 
-module GC (input clk, input mclk, input [15:0] Ein, output [15:0] Eout, input [3:0] gcop, output [5:0] ostate, output conn_et, output conn_ea, output step_eval, output [15:0] result);
+module GC (input clk, input mclk, input [15:0] Ein, output [15:0] Eout, input [3:0] gcop, output [5:0] ostate, output conn_et, output conn_ea, output step_eval, output ram_we, output [12:0] ram_addr, output [15:0] ram_di, input [15:0] ram_do);
    reg [15:0] rom_output;
    reg [5:0]  gostate = 6'o0;
    reg [5:0]  gnstate;
@@ -12,7 +12,7 @@ module GC (input clk, input mclk, input [15:0] Ein, output [15:0] Eout, input [3
 
    wire ga_zero_disp = rom_output[15];
    wire gcop_disp    = rom_output[14];
-   wire write        = rom_output[13];
+   assign ram_we     = rom_output[13];
    wire adr          = rom_output[12];
    wire rdR          = rom_output[11];
    wire rdQ          = rom_output[10];
@@ -99,7 +99,8 @@ module GC (input clk, input mclk, input [15:0] Ein, output [15:0] Eout, input [3
 
    reg [12:0] A; // latched address
 
-   wire [15:0] I;
+   assign ram_addr = A;
+   assign ram_di = S;
 
    wire [15:0] G;
    wire [15:0] Gout;
@@ -108,7 +109,7 @@ module GC (input clk, input mclk, input [15:0] Ein, output [15:0] Eout, input [3
    wire [15:0] GfromQ = rdQ ? Q : 0;
    wire [15:0] GfromP = rdP ? {3'b0, P} : 0;
    wire [15:0] GfromP_plus = rdP_plus ? {3'b0, P + 1} : 0;
-   wire [15:0] GfromI = conn_i ? I : 0;
+   wire [15:0] GfromI = conn_i ? ram_do : 0;
    wire [12:0] GAfromE = conn_ea ? Ein_latched[12:0] : 0;
    wire [2:0] GTfromE = conn_et ? Ein_latched[15:13] : 0;
    wire [15:0] GfromE = {GTfromE, GAfromE};
@@ -119,8 +120,6 @@ module GC (input clk, input mclk, input [15:0] Ein, output [15:0] Eout, input [3
    assign Eout[12:0]  = conn_ea ? Gout[12:0]  : 0;
    assign Eout[15:13] = conn_et ? Gout[15:13] : 0;
 
-   GCRAM gcram (.clk(mclk), .we(write), .addr(A), .do(I), .di(S), .result(result));
-
    always @ (posedge clk) begin
          if (ldS) S = G;
          if (ldP) P <= G[12:0];