diff --git a/CPUProject.bdf b/CPUProject.bdf
index 6372c4e..358afc4 100644
--- a/CPUProject.bdf
+++ b/CPUProject.bdf
@@ -53,7 +53,7 @@ refer to the applicable agreement for further details.
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 	(pt 0 8)
@@ -69,7 +69,7 @@ refer to the applicable agreement for further details.
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 (pin
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 	(pt 0 8)
@@ -85,7 +85,7 @@ refer to the applicable agreement for further details.
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@@ -101,7 +101,7 @@ refer to the applicable agreement for further details.
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@@ -117,7 +117,7 @@ refer to the applicable agreement for further details.
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@@ -133,7 +133,7 @@ refer to the applicable agreement for further details.
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 	(pt 0 8)
@@ -149,7 +149,7 @@ refer to the applicable agreement for further details.
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 (pin
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@@ -165,7 +165,7 @@ refer to the applicable agreement for further details.
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 	(pt 0 8)
@@ -181,7 +181,7 @@ refer to the applicable agreement for further details.
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 (pin
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 	(pt 0 8)
@@ -195,6 +195,134 @@ refer to the applicable agreement for further details.
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@@ -770,168 +898,6 @@ refer to the applicable agreement for further details.
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@@ -1378,6 +1344,189 @@ refer to the applicable agreement for further details.
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@@ -1428,11 +1577,6 @@ refer to the applicable agreement for further details.
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@@ -1459,11 +1603,6 @@ refer to the applicable agreement for further details.
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@@ -1556,147 +1695,6 @@ refer to the applicable agreement for further details.
 	(pt 1120 368)
 	(pt 1152 368)
 )
-(connector
-	(text "R0_count" (rect 1186 -200 1230 -183)(font "Intel Clear" ))
-	(pt 1176 -184)
-	(pt 1224 -184)
-)
-(connector
-	(text "R0_en" (rect 1186 -184 1216 -167)(font "Intel Clear" ))
-	(pt 1176 -168)
-	(pt 1224 -168)
-)
-(connector
-	(text "R1_en" (rect 1186 -168 1216 -151)(font "Intel Clear" ))
-	(pt 1176 -152)
-	(pt 1224 -152)
-)
-(connector
-	(text "R2_en" (rect 1186 -152 1216 -135)(font "Intel Clear" ))
-	(pt 1176 -136)
-	(pt 1224 -136)
-)
-(connector
-	(text "R3_en" (rect 1186 -136 1216 -119)(font "Intel Clear" ))
-	(pt 1176 -120)
-	(pt 1224 -120)
-)
-(connector
-	(text "R4_en" (rect 1186 -120 1216 -103)(font "Intel Clear" ))
-	(pt 1176 -104)
-	(pt 1224 -104)
-)
-(connector
-	(text "R5_en" (rect 1186 -104 1216 -87)(font "Intel Clear" ))
-	(pt 1176 -88)
-	(pt 1224 -88)
-)
-(connector
-	(text "R6_en" (rect 1186 -88 1216 -71)(font "Intel Clear" ))
-	(pt 1176 -72)
-	(pt 1224 -72)
-)
-(connector
-	(text "R7_en" (rect 1186 -72 1216 -55)(font "Intel Clear" ))
-	(pt 1176 -56)
-	(pt 1224 -56)
-)
-(connector
-	(text "s1[2..0]" (rect 1186 -56 1220 -39)(font "Intel Clear" ))
-	(pt 1176 -40)
-	(pt 1224 -40)
-	(bus)
-)
-(connector
-	(text "s2[2..0]" (rect 1186 -40 1220 -23)(font "Intel Clear" ))
-	(pt 1176 -24)
-	(pt 1224 -24)
-	(bus)
-)
-(connector
-	(text "s3[2..0]" (rect 1186 -24 1220 -7)(font "Intel Clear" ))
-	(pt 1176 -8)
-	(pt 1224 -8)
-	(bus)
-)
-(connector
-	(text "s4" (rect 1186 -8 1196 9)(font "Intel Clear" ))
-	(pt 1176 8)
-	(pt 1224 8)
-)
-(connector
-	(text "RAMd_en" (rect 1186 24 1233 41)(font "Intel Clear" ))
-	(pt 1176 40)
-	(pt 1224 40)
-)
-(connector
-	(text "RAMi_en" (rect 1186 40 1229 57)(font "Intel Clear" ))
-	(pt 1176 56)
-	(pt 1224 56)
-)
-(connector
-	(text "RAMd_wren" (rect 1186 8 1245 25)(font "Intel Clear" ))
-	(pt 1176 24)
-	(pt 1240 24)
-)
-(connector
-	(text "EXEC1" (rect 938 -184 969 -167)(font "Intel Clear" ))
-	(pt 968 -168)
-	(pt 928 -168)
-)
-(connector
-	(text "COND" (rect 938 -152 967 -135)(font "Intel Clear" ))
-	(pt 928 -136)
-	(pt 968 -136)
-)
-(connector
-	(text "ALU_en" (rect 1186 56 1223 73)(font "Intel Clear" ))
-	(pt 1176 72)
-	(pt 1224 72)
-)
-(connector
-	(text "EXEC2" (rect 938 -168 969 -151)(font "Intel Clear" ))
-	(pt 968 -152)
-	(pt 928 -152)
-)
-(connector
-	(pt 912 -184)
-	(pt 968 -184)
-	(bus)
-)
-(connector
-	(text "E2" (rect 1186 72 1197 89)(font "Intel Clear" ))
-	(pt 1176 88)
-	(pt 1224 88)
-)
-(connector
-	(text "instr[15..0]" (rect 896 -130 913 -81)(font "Intel Clear" )(vertical))
-	(pt 912 -184)
-	(pt 912 -72)
-	(bus)
-)
-(connector
-	(text "instr[15..0]" (rect 864 -88 913 -71)(font "Intel Clear" ))
-	(pt 872 -72)
-	(pt 912 -72)
-	(bus)
-)
-(connector
-	(pt 872 -72)
-	(pt 872 -32)
-	(bus)
-)
-(connector
-	(pt 872 -32)
-	(pt 872 224)
-	(bus)
-)
-(connector
-	(text "instr[15..10]" (rect 882 -48 937 -31)(font "Intel Clear" ))
-	(pt 872 -32)
-	(pt 936 -32)
-	(bus)
-)
 (connector
 	(text "EXEC2" (rect 792 27 809 58)(font "Intel Clear" )(vertical))
 	(pt 808 32)
@@ -1707,12 +1705,6 @@ refer to the applicable agreement for further details.
 	(pt 792 32)
 	(pt 792 64)
 )
-(connector
-	(text "Rs1[15..0]" (rect 818 160 865 177)(font "Intel Clear" ))
-	(pt 856 176)
-	(pt 816 176)
-	(bus)
-)
 (connector
 	(pt 208 -80)
 	(pt 208 144)
@@ -1863,71 +1855,36 @@ refer to the applicable agreement for further details.
 	(pt 464 144)
 	(bus)
 )
-(connector
-	(pt 408 208)
-	(pt 480 208)
-	(bus)
-)
 (connector
 	(pt 480 208)
 	(pt 632 208)
 	(bus)
 )
-(connector
-	(pt 408 224)
-	(pt 496 224)
-	(bus)
-)
 (connector
 	(pt 496 224)
 	(pt 632 224)
 	(bus)
 )
-(connector
-	(pt 408 240)
-	(pt 512 240)
-	(bus)
-)
 (connector
 	(pt 512 240)
 	(pt 632 240)
 	(bus)
 )
-(connector
-	(pt 408 256)
-	(pt 528 256)
-	(bus)
-)
 (connector
 	(pt 528 256)
 	(pt 632 256)
 	(bus)
 )
-(connector
-	(pt 408 272)
-	(pt 544 272)
-	(bus)
-)
 (connector
 	(pt 544 272)
 	(pt 632 272)
 	(bus)
 )
-(connector
-	(pt 408 288)
-	(pt 560 288)
-	(bus)
-)
 (connector
 	(pt 560 288)
 	(pt 632 288)
 	(bus)
 )
-(connector
-	(pt 408 304)
-	(pt 576 304)
-	(bus)
-)
 (connector
 	(pt 576 304)
 	(pt 632 304)
@@ -2144,32 +2101,6 @@ refer to the applicable agreement for further details.
 	(pt 592 592)
 	(bus)
 )
-(connector
-	(text "Rs1[15..0]" (rect 882 128 929 145)(font "Intel Clear" ))
-	(pt 856 144)
-	(pt 928 144)
-	(bus)
-)
-(connector
-	(pt 856 144)
-	(pt 856 176)
-	(bus)
-)
-(connector
-	(pt 856 176)
-	(pt 856 192)
-	(bus)
-)
-(connector
-	(pt 1160 192)
-	(pt 1160 320)
-	(bus)
-)
-(connector
-	(pt 1160 320)
-	(pt 1216 320)
-	(bus)
-)
 (connector
 	(pt 1120 336)
 	(pt 1216 336)
@@ -2186,80 +2117,11 @@ refer to the applicable agreement for further details.
 	(pt 1416 304)
 	(bus)
 )
-(connector
-	(pt 1416 624)
-	(pt 1224 624)
-	(bus)
-)
-(connector
-	(pt 1232 648)
-	(pt 1224 648)
-	(bus)
-)
-(connector
-	(pt 1224 648)
-	(pt 1224 624)
-	(bus)
-)
 (connector
 	(pt 136 792)
 	(pt 1416 792)
 	(bus)
 )
-(connector
-	(pt 1416 304)
-	(pt 1416 624)
-	(bus)
-)
-(connector
-	(pt 1416 624)
-	(pt 1416 792)
-	(bus)
-)
-(connector
-	(text "CARRY" (rect 1186 648 1221 665)(font "Intel Clear" ))
-	(pt 1176 664)
-	(pt 1232 664)
-)
-(connector
-	(text "Rs1[15..0]" (rect 1186 680 1233 697)(font "Intel Clear" ))
-	(pt 1176 696)
-	(pt 1232 696)
-	(bus)
-)
-(connector
-	(text "Rs2[15..0]" (rect 1186 696 1233 713)(font "Intel Clear" ))
-	(pt 1176 712)
-	(pt 1232 712)
-	(bus)
-)
-(connector
-	(text "Rd[15..0]" (rect 1186 664 1228 681)(font "Intel Clear" ))
-	(pt 1176 680)
-	(pt 1232 680)
-	(bus)
-)
-(connector
-	(text "instr[15..0]" (rect 1184 712 1233 729)(font "Intel Clear" ))
-	(pt 1176 728)
-	(pt 1232 728)
-	(bus)
-)
-(connector
-	(text "FETCH" (rect 1186 728 1217 745)(font "Intel Clear" ))
-	(pt 1176 744)
-	(pt 1232 744)
-)
-(connector
-	(text "EXEC1" (rect 1186 744 1217 761)(font "Intel Clear" ))
-	(pt 1176 760)
-	(pt 1232 760)
-)
-(connector
-	(text "EXEC2" (rect 1186 760 1217 777)(font "Intel Clear" ))
-	(pt 1176 776)
-	(pt 1232 776)
-)
 (connector
 	(text "CLK" (rect 890 512 910 529)(font "Intel Clear" ))
 	(pt 936 528)
@@ -2301,11 +2163,356 @@ refer to the applicable agreement for further details.
 	(pt 1184 352)
 	(bus)
 )
+(connector
+	(text "instr[15..10]" (rect 882 -48 937 -31)(font "Intel Clear" ))
+	(pt 872 -32)
+	(pt 936 -32)
+	(bus)
+)
+(connector
+	(pt 872 -72)
+	(pt 872 -32)
+	(bus)
+)
+(connector
+	(pt 872 -32)
+	(pt 872 224)
+	(bus)
+)
+(connector
+	(pt 856 -72)
+	(pt 872 -72)
+	(bus)
+)
+(connector
+	(text "instr[15..0]" (rect 864 -88 913 -71)(font "Intel Clear" ))
+	(pt 872 -72)
+	(pt 912 -72)
+	(bus)
+)
+(connector
+	(pt 1152 192)
+	(pt 1160 192)
+	(bus)
+)
+(connector
+	(pt 1160 192)
+	(pt 1160 320)
+	(bus)
+)
+(connector
+	(pt 1216 320)
+	(pt 1160 320)
+	(bus)
+)
+(connector
+	(pt 912 -72)
+	(pt 912 -104)
+	(bus)
+)
+(connector
+	(text "instr[15..0]" (rect 906 -120 955 -103)(font "Intel Clear" ))
+	(pt 912 -104)
+	(pt 1168 -104)
+	(bus)
+)
+(connector
+	(text "EXEC1" (rect 1138 -104 1169 -87)(font "Intel Clear" ))
+	(pt 1128 -88)
+	(pt 1168 -88)
+)
+(connector
+	(text "EXEC2" (rect 1138 -88 1169 -71)(font "Intel Clear" ))
+	(pt 1128 -72)
+	(pt 1168 -72)
+)
+(connector
+	(text "COND" (rect 1138 -72 1167 -55)(font "Intel Clear" ))
+	(pt 1128 -56)
+	(pt 1168 -56)
+)
+(connector
+	(text "R0_count" (rect 1386 -120 1430 -103)(font "Intel Clear" ))
+	(pt 1376 -104)
+	(pt 1424 -104)
+)
+(connector
+	(text "R0_en" (rect 1386 -104 1416 -87)(font "Intel Clear" ))
+	(pt 1376 -88)
+	(pt 1424 -88)
+)
+(connector
+	(text "R1_en" (rect 1386 -88 1416 -71)(font "Intel Clear" ))
+	(pt 1376 -72)
+	(pt 1424 -72)
+)
+(connector
+	(text "R2_en" (rect 1386 -72 1416 -55)(font "Intel Clear" ))
+	(pt 1376 -56)
+	(pt 1424 -56)
+)
+(connector
+	(text "R3_en" (rect 1386 -56 1416 -39)(font "Intel Clear" ))
+	(pt 1376 -40)
+	(pt 1424 -40)
+)
+(connector
+	(text "R4_en" (rect 1386 -40 1416 -23)(font "Intel Clear" ))
+	(pt 1376 -24)
+	(pt 1424 -24)
+)
+(connector
+	(text "R5_en" (rect 1386 -24 1416 -7)(font "Intel Clear" ))
+	(pt 1376 -8)
+	(pt 1424 -8)
+)
+(connector
+	(text "R6_en" (rect 1386 -8 1416 9)(font "Intel Clear" ))
+	(pt 1376 8)
+	(pt 1424 8)
+)
+(connector
+	(text "R7_en" (rect 1386 8 1416 25)(font "Intel Clear" ))
+	(pt 1376 24)
+	(pt 1424 24)
+)
+(connector
+	(text "s1[2..0]" (rect 1386 24 1420 41)(font "Intel Clear" ))
+	(pt 1376 40)
+	(pt 1424 40)
+	(bus)
+)
+(connector
+	(text "s2[2..0]" (rect 1386 40 1420 57)(font "Intel Clear" ))
+	(pt 1376 56)
+	(pt 1424 56)
+	(bus)
+)
+(connector
+	(text "s3[2..0]" (rect 1386 56 1420 73)(font "Intel Clear" ))
+	(pt 1376 72)
+	(pt 1424 72)
+	(bus)
+)
+(connector
+	(text "s4" (rect 1386 72 1396 89)(font "Intel Clear" ))
+	(pt 1376 88)
+	(pt 1424 88)
+)
+(connector
+	(text "RAMd_wren" (rect 1386 88 1445 105)(font "Intel Clear" ))
+	(pt 1376 104)
+	(pt 1440 104)
+)
+(connector
+	(text "RAMd_en" (rect 1386 104 1433 121)(font "Intel Clear" ))
+	(pt 1376 120)
+	(pt 1424 120)
+)
+(connector
+	(text "RAMi_en" (rect 1386 120 1429 137)(font "Intel Clear" ))
+	(pt 1376 136)
+	(pt 1424 136)
+)
+(connector
+	(text "ALU_en" (rect 1386 136 1423 153)(font "Intel Clear" ))
+	(pt 1376 152)
+	(pt 1424 152)
+)
+(connector
+	(text "E2" (rect 1386 152 1397 169)(font "Intel Clear" ))
+	(pt 1376 168)
+	(pt 1424 168)
+)
+(connector
+	(text "stack_en" (rect 1386 168 1428 185)(font "Intel Clear" ))
+	(pt 1376 184)
+	(pt 1424 184)
+)
+(connector
+	(text "stack_rst" (rect 1386 184 1428 201)(font "Intel Clear" ))
+	(pt 1376 200)
+	(pt 1424 200)
+)
+(connector
+	(text "stack_rw" (rect 1386 200 1428 217)(font "Intel Clear" ))
+	(pt 1376 216)
+	(pt 1424 216)
+)
+(connector
+	(pt 856 176)
+	(pt 856 192)
+	(bus)
+)
+(connector
+	(text "Rs1[15..0]" (rect 818 160 865 177)(font "Intel Clear" ))
+	(pt 816 176)
+	(pt 856 176)
+	(bus)
+)
+(connector
+	(text "R1[15..0]" (rect 418 192 460 209)(font "Intel Clear" ))
+	(pt 408 208)
+	(pt 480 208)
+	(bus)
+)
+(connector
+	(text "R2[15..0]" (rect 418 208 460 225)(font "Intel Clear" ))
+	(pt 408 224)
+	(pt 496 224)
+	(bus)
+)
+(connector
+	(text "R3[15..0]" (rect 418 224 460 241)(font "Intel Clear" ))
+	(pt 408 240)
+	(pt 512 240)
+	(bus)
+)
+(connector
+	(text "R4[15..0]" (rect 418 240 460 257)(font "Intel Clear" ))
+	(pt 408 256)
+	(pt 528 256)
+	(bus)
+)
+(connector
+	(text "R5[15..0]" (rect 418 256 460 273)(font "Intel Clear" ))
+	(pt 408 272)
+	(pt 544 272)
+	(bus)
+)
+(connector
+	(text "R6[15..0]" (rect 418 272 460 289)(font "Intel Clear" ))
+	(pt 408 288)
+	(pt 560 288)
+	(bus)
+)
+(connector
+	(text "R7[15..0]" (rect 418 288 460 305)(font "Intel Clear" ))
+	(pt 408 304)
+	(pt 576 304)
+	(bus)
+)
+(connector
+	(pt 1416 496)
+	(pt 1224 496)
+	(bus)
+)
+(connector
+	(pt 1232 520)
+	(pt 1224 520)
+	(bus)
+)
+(connector
+	(pt 1224 520)
+	(pt 1224 496)
+	(bus)
+)
+(connector
+	(text "EXEC1" (rect 1186 616 1217 633)(font "Intel Clear" ))
+	(pt 1176 632)
+	(pt 1232 632)
+)
+(connector
+	(text "EXEC2" (rect 1186 632 1217 649)(font "Intel Clear" ))
+	(pt 1176 648)
+	(pt 1232 648)
+)
+(connector
+	(text "CARRY" (rect 1186 520 1221 537)(font "Intel Clear" ))
+	(pt 1176 536)
+	(pt 1232 536)
+)
+(connector
+	(text "Rd[15..0]" (rect 1186 536 1228 553)(font "Intel Clear" ))
+	(pt 1176 552)
+	(pt 1232 552)
+	(bus)
+)
+(connector
+	(text "Rs1[15..0]" (rect 1186 552 1233 569)(font "Intel Clear" ))
+	(pt 1176 568)
+	(pt 1232 568)
+	(bus)
+)
+(connector
+	(text "Rs2[15..0]" (rect 1186 568 1233 585)(font "Intel Clear" ))
+	(pt 1176 584)
+	(pt 1232 584)
+	(bus)
+)
+(connector
+	(text "instr[15..0]" (rect 1184 584 1233 601)(font "Intel Clear" ))
+	(pt 1176 600)
+	(pt 1232 600)
+	(bus)
+)
+(connector
+	(text "FETCH" (rect 1186 600 1217 617)(font "Intel Clear" ))
+	(pt 1176 616)
+	(pt 1232 616)
+)
+(connector
+	(pt 1416 304)
+	(pt 1416 496)
+	(bus)
+)
+(connector
+	(pt 1416 496)
+	(pt 1416 792)
+	(bus)
+)
+(connector
+	(text "PC[15..0]" (rect 1186 648 1229 665)(font "Intel Clear" ))
+	(pt 1232 664)
+	(pt 1176 664)
+	(bus)
+)
+(connector
+	(text "R1[15..0]" (rect 1186 664 1228 681)(font "Intel Clear" ))
+	(pt 1232 680)
+	(pt 1176 680)
+	(bus)
+)
+(connector
+	(text "R2[15..0]" (rect 1186 680 1228 697)(font "Intel Clear" ))
+	(pt 1232 696)
+	(pt 1176 696)
+	(bus)
+)
+(connector
+	(text "R3[15..0]" (rect 1186 696 1228 713)(font "Intel Clear" ))
+	(pt 1232 712)
+	(pt 1176 712)
+	(bus)
+)
+(connector
+	(text "R4[15..0]" (rect 1186 712 1228 729)(font "Intel Clear" ))
+	(pt 1232 728)
+	(pt 1176 728)
+	(bus)
+)
+(connector
+	(text "R5[15..0]" (rect 1186 728 1228 745)(font "Intel Clear" ))
+	(pt 1232 744)
+	(pt 1176 744)
+	(bus)
+)
+(connector
+	(text "R6[15..0]" (rect 1186 744 1228 761)(font "Intel Clear" ))
+	(pt 1232 760)
+	(pt 1176 760)
+	(bus)
+)
+(connector
+	(text "R7[15..0]" (rect 1186 760 1228 777)(font "Intel Clear" ))
+	(pt 1232 776)
+	(pt 1176 776)
+	(bus)
+)
 (junction (pt 488 -72))
 (junction (pt 856 192))
 (junction (pt 872 -72))
 (junction (pt 872 -32))
-(junction (pt 856 176))
 (junction (pt 136 320))
 (junction (pt 136 352))
 (junction (pt 136 384))
@@ -2329,4 +2536,4 @@ refer to the applicable agreement for further details.
 (junction (pt 544 480))
 (junction (pt 560 496))
 (junction (pt 576 512))
-(junction (pt 1416 624))
+(junction (pt 1416 496))
diff --git a/CPUProject.qsf b/CPUProject.qsf
index 867f441..69f8bc0 100644
--- a/CPUProject.qsf
+++ b/CPUProject.qsf
@@ -38,7 +38,7 @@
 
 set_global_assignment -name FAMILY "Cyclone IV E"
 set_global_assignment -name DEVICE AUTO
-set_global_assignment -name TOP_LEVEL_ENTITY mux_8x16
+set_global_assignment -name TOP_LEVEL_ENTITY test
 set_global_assignment -name ORIGINAL_QUARTUS_VERSION 18.1.0
 set_global_assignment -name PROJECT_CREATION_TIME_DATE "12:38:11  MAY 20, 2020"
 set_global_assignment -name LAST_QUARTUS_VERSION "18.1.0 Standard Edition"
@@ -62,8 +62,9 @@ set_global_assignment -name VERILOG_FILE min.v
 set_global_assignment -name VERILOG_FILE SM.v
 set_global_assignment -name BDF_FILE ALU_top.bdf
 set_global_assignment -name VERILOG_FILE mux_8x16.v
+set_global_assignment -name VERILOG_FILE mux_3x16.v
+set_global_assignment -name BDF_FILE test.bdf
 set_global_assignment -name PARTITION_NETLIST_TYPE SOURCE -section_id Top
 set_global_assignment -name PARTITION_FITTER_PRESERVATION_LEVEL PLACEMENT_AND_ROUTING -section_id Top
 set_global_assignment -name PARTITION_COLOR 16764057 -section_id Top
-set_global_assignment -name VERILOG_FILE mux_3x16.v
 set_instance_assignment -name PARTITION_HIERARCHY root_partition -to | -section_id Top
\ No newline at end of file
diff --git a/DECODE.bsf b/DECODE.bsf
index 59e6f44..fd5546f 100644
--- a/DECODE.bsf
+++ b/DECODE.bsf
@@ -20,9 +20,9 @@ refer to the applicable agreement for further details.
 */
 (header "symbol" (version "1.1"))
 (symbol
-	(rect 16 16 224 352)
+	(rect 16 16 224 416)
 	(text "DECODE" (rect 5 0 47 12)(font "Arial" ))
-	(text "inst" (rect 8 320 20 332)(font "Arial" ))
+	(text "inst" (rect 8 384 20 396)(font "Arial" ))
 	(port
 		(pt 0 32)
 		(input)
@@ -177,7 +177,28 @@ refer to the applicable agreement for further details.
 		(text "E2" (rect 176 299 187 311)(font "Arial" ))
 		(line (pt 208 304)(pt 192 304)(line_width 1))
 	)
+	(port
+		(pt 208 320)
+		(output)
+		(text "stack_en" (rect 0 0 36 12)(font "Arial" ))
+		(text "stack_en" (rect 151 315 187 327)(font "Arial" ))
+		(line (pt 208 320)(pt 192 320)(line_width 1))
+	)
+	(port
+		(pt 208 336)
+		(output)
+		(text "stack_rst" (rect 0 0 37 12)(font "Arial" ))
+		(text "stack_rst" (rect 150 331 187 343)(font "Arial" ))
+		(line (pt 208 336)(pt 192 336)(line_width 1))
+	)
+	(port
+		(pt 208 352)
+		(output)
+		(text "stack_rw" (rect 0 0 36 12)(font "Arial" ))
+		(text "stack_rw" (rect 151 347 187 359)(font "Arial" ))
+		(line (pt 208 352)(pt 192 352)(line_width 1))
+	)
 	(drawing
-		(rectangle (rect 16 16 192 320)(line_width 1))
+		(rectangle (rect 16 16 192 384)(line_width 1))
 	)
 )
diff --git a/DECODE.v b/DECODE.v
index 9676be8..5b29a0a 100644
--- a/DECODE.v
+++ b/DECODE.v
@@ -58,15 +58,15 @@ module DECODE
 	assign R5_en = EXEC1 & ~(UJMP | JMP | STORE | LOAD | MUL | MLA | MLS | NOP | STP | POP) &  Rd[2] & ~Rd[1] &  Rd[0] | EXEC2 & LOAD &  Rls[2] & ~Rls[1] &  Rls[0] | EXEC2 & (MUL | MLA | MLS | POP) &  Rd[2] & ~Rd[1] &  Rd[0];
 	assign R6_en = EXEC1 & ~(UJMP | JMP | STORE | LOAD | MUL | MLA | MLS | NOP | STP | POP) &  Rd[2] &  Rd[1] & ~Rd[0] | EXEC2 & LOAD &  Rls[2] &  Rls[1] & ~Rls[0] | EXEC2 & (MUL | MLA | MLS | POP) &  Rd[2] &  Rd[1] & ~Rd[0];
 	assign R7_en = EXEC1 & ~(UJMP | JMP | STORE | LOAD | MUL | MLA | MLS | NOP | STP | POP) &  Rd[2] &  Rd[1] &  Rd[0] | EXEC2 & LOAD &  Rls[2] &  Rls[1] &  Rls[0] | EXEC2 & (MUL | MLA | MLS | POP) &  Rd[2] &  Rd[1] &  Rd[0];
-	assign s1[2] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP) & Rs1[2]) | (STORE & Rls[2]) | (PSH & Rs1[2]));
-	assign s1[1] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP) & Rs1[1]) | (STORE & Rls[1]) | (PSH & Rs1[1]));
-	assign s1[0] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP) & Rs1[0]) | (STORE & Rls[0]) | (PSH & Rs1[0]));
-	assign s2[2] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rs2[2]);
-	assign s2[1] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rs2[1]);
-	assign s2[0] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rs2[0]);
-	assign s3[2] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rd[2]);
-	assign s3[1] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rd[1]);
-	assign s3[0] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP)) & Rd[0]);
+	assign s1[2] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP | PSH | POP) & Rs1[2]) | (STORE & Rls[2]) | (PSH & Rs1[2]));
+	assign s1[1] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP | PSH | POP) & Rs1[1]) | (STORE & Rls[1]) | (PSH & Rs1[1]));
+	assign s1[0] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP | PSH | POP) & Rs1[0]) | (STORE & Rls[0]) | (PSH & Rs1[0]));
+	assign s2[2] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP | PSH | POP)) & Rs2[2]);
+	assign s2[1] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP | PSH | POP)) & Rs2[1]);
+	assign s2[0] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP | PSH | POP)) & Rs2[0]);
+	assign s3[2] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP | PSH | POP)) & Rd[2]);
+	assign s3[1] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP | PSH | POP)) & Rd[1]);
+	assign s3[0] = EXEC1 & ((~(UJMP | JMP | STORE | LOAD | NOP | STP | PSH | POP)) & Rd[0]);
 	assign s4 = EXEC1 & ~(LOAD | STORE);
 	assign RAMd_wren = EXEC1 & STORE;
 	assign RAMd_en = EXEC1 & (STORE | LOAD);
diff --git a/test.bdf b/test.bdf
new file mode 100644
index 0000000..e016cc5
--- /dev/null
+++ b/test.bdf
@@ -0,0 +1,127 @@
+/*
+WARNING: Do NOT edit the input and output ports in this file in a text
+editor if you plan to continue editing the block that represents it in
+the Block Editor! File corruption is VERY likely to occur.
+*/
+/*
+Copyright (C) 2018  Intel Corporation. All rights reserved.
+Your use of Intel Corporation's design tools, logic functions 
+and other software and tools, and its AMPP partner logic 
+functions, and any output files from any of the foregoing 
+(including device programming or simulation files), and any 
+associated documentation or information are expressly subject 
+to the terms and conditions of the Intel Program License 
+Subscription Agreement, the Intel Quartus Prime License Agreement,
+the Intel FPGA IP License Agreement, or other applicable license
+agreement, including, without limitation, that your use is for
+the sole purpose of programming logic devices manufactured by
+Intel and sold by Intel or its authorized distributors.  Please
+refer to the applicable agreement for further details.
+*/
+(header "graphic" (version "1.4"))
+(pin
+	(input)
+	(rect 176 288 344 304)
+	(text "INPUT" (rect 125 0 153 10)(font "Arial" (font_size 6)))
+	(text "A" (rect 5 0 14 12)(font "Arial" ))
+	(pt 168 8)
+	(drawing
+		(line (pt 84 12)(pt 109 12))
+		(line (pt 84 4)(pt 109 4))
+		(line (pt 113 8)(pt 168 8))
+		(line (pt 84 12)(pt 84 4))
+		(line (pt 109 4)(pt 113 8))
+		(line (pt 109 12)(pt 113 8))
+	)
+	(text "VCC" (rect 128 7 148 17)(font "Arial" (font_size 6)))
+)
+(pin
+	(input)
+	(rect 176 304 344 320)
+	(text "INPUT" (rect 125 0 153 10)(font "Arial" (font_size 6)))
+	(text "B" (rect 5 0 13 17)(font "Intel Clear" ))
+	(pt 168 8)
+	(drawing
+		(line (pt 84 12)(pt 109 12))
+		(line (pt 84 4)(pt 109 4))
+		(line (pt 113 8)(pt 168 8))
+		(line (pt 84 12)(pt 84 4))
+		(line (pt 109 4)(pt 113 8))
+		(line (pt 109 12)(pt 113 8))
+	)
+	(text "VCC" (rect 128 7 148 17)(font "Arial" (font_size 6)))
+)
+(pin
+	(output)
+	(rect 464 296 640 312)
+	(text "OUTPUT" (rect 1 0 39 10)(font "Arial" (font_size 6)))
+	(text "OUT1" (rect 90 0 117 17)(font "Intel Clear" ))
+	(pt 0 8)
+	(drawing
+		(line (pt 0 8)(pt 52 8))
+		(line (pt 52 4)(pt 78 4))
+		(line (pt 52 12)(pt 78 12))
+		(line (pt 52 12)(pt 52 4))
+		(line (pt 78 4)(pt 82 8))
+		(line (pt 82 8)(pt 78 12))
+		(line (pt 78 12)(pt 82 8))
+	)
+)
+(pin
+	(output)
+	(rect 536 208 712 224)
+	(text "OUTPUT" (rect 1 0 39 10)(font "Arial" (font_size 6)))
+	(text "OUT2" (rect 90 0 118 12)(font "Arial" ))
+	(pt 0 8)
+	(drawing
+		(line (pt 0 8)(pt 52 8))
+		(line (pt 52 4)(pt 78 4))
+		(line (pt 52 12)(pt 78 12))
+		(line (pt 52 12)(pt 52 4))
+		(line (pt 78 4)(pt 82 8))
+		(line (pt 82 8)(pt 78 12))
+		(line (pt 78 12)(pt 82 8))
+	)
+)
+(symbol
+	(rect 344 280 408 328)
+	(text "AND2" (rect 1 0 25 10)(font "Arial" (font_size 6)))
+	(text "inst" (rect 3 37 20 49)(font "Arial" ))
+	(port
+		(pt 0 16)
+		(input)
+		(text "IN1" (rect 2 7 19 19)(font "Courier New" (bold))(invisible))
+		(text "IN1" (rect 2 7 19 19)(font "Courier New" (bold))(invisible))
+		(line (pt 0 16)(pt 14 16))
+	)
+	(port
+		(pt 0 32)
+		(input)
+		(text "IN2" (rect 2 23 19 35)(font "Courier New" (bold))(invisible))
+		(text "IN2" (rect 2 23 19 35)(font "Courier New" (bold))(invisible))
+		(line (pt 0 32)(pt 14 32))
+	)
+	(port
+		(pt 64 24)
+		(output)
+		(text "OUT" (rect 48 15 65 27)(font "Courier New" (bold))(invisible))
+		(text "OUT" (rect 48 15 65 27)(font "Courier New" (bold))(invisible))
+		(line (pt 42 24)(pt 64 24))
+	)
+	(drawing
+		(line (pt 14 12)(pt 30 12))
+		(line (pt 14 37)(pt 31 37))
+		(line (pt 14 12)(pt 14 37))
+		(arc (pt 31 37)(pt 30 12)(rect 18 12 43 37))
+	)
+)
+(connector
+	(text "hi" (rect 418 288 426 305)(font "Intel Clear" ))
+	(pt 408 304)
+	(pt 464 304)
+)
+(connector
+	(text "hi" (rect 522 200 530 217)(font "Intel Clear" ))
+	(pt 536 216)
+	(pt 512 216)
+)