Fix JIN, XCH, INX.

ei9 · Apr 12, 2021 · 049b5c3 · 049b5c3
1 parent fae7d6d
commit 049b5c3
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Showing 2 changed files with 12 additions and 1 deletion.
diff --git a/src/sap2_mini.v b/src/sap2_mini.v
@@ -123,7 +123,7 @@ module ctrl(output[29:0] con, output hlt, input clk,clr,am,az,xm,xz, input[7:0]
     assign con[5] = (sc[3] & CMB) | (sc[4] & (ADD|SUB|LDB));  // LB
     assign con[4] = (sc[4] & LDX) | (sc[5] & XCH);  // LX
     assign con[3] = sc[3] & INX;  // INX
-    assign con[2] = (sc[3] & DEX) | (sc[4] & XCH);  // DEX
+    assign con[2] = sc[3] & DEX;  // DEX
     assign con[1] = sc[4] & XCH;  // EX
     assign con[0] = sc[3] & OUT;  // LO
 

diff --git a/src/tb_sap2_mini.v b/src/tb_sap2_mini.v
@@ -122,6 +122,17 @@ module tb_sap2_mini;
         // HLT
         // End [Subroutine test]
 
+        // Start [Pointer test]
+        #4 a = 8'h0; d = 12'h004;  // LDA 04H
+        #4 a = 8'h1; d = 12'hf2x;  // XCH
+        #4 a = 8'h2; d = 12'hf4x;  // INX
+        #4 a = 8'h3; d = 12'h905;  // JIN 05H
+        #4 a = 8'h4; d = 12'heff;  // EFFH
+        #4 a = 8'h5; d = 12'hf2x;  // XCH
+        #4 a = 8'h6; d = 12'hfex;  // OUT
+        #4 a = 8'h7; d = 12'hffx;  // HLT
+        // End [Pointer test]
+
         #4 prog = 0; clr = 1;
         #4 clr = 0;
     end