X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/5509558d05f30339f3393f02f67e8854cbe25a00..5c33c5c001049403ac33d71bfbe0115c318c1b4c:/insn_rst.v

diff --git a/insn_rst.v b/insn_rst.v
index 8752034..4b65032 100644
--- a/insn_rst.v
+++ b/insn_rst.v
@@ -1,23 +1,12 @@
 `ifdef EXECUTE
 	`INSN_RST: begin
 		case (cycle)
-		0:	begin
-				`EXEC_INC_PC;		// This goes FIRST in RST
-			end
-		1:	begin
-				wr <= 1;
-				address <= {registers[`REG_SPH],registers[`REG_SPL]}-1;
-				wdata <= registers[`REG_PCH];
-			end
-		2:	begin
-				wr <= 1;
-				address <= {registers[`REG_SPH],registers[`REG_SPL]}-2;
-				wdata <= registers[`REG_PCL];
-			end
+		0:	`EXEC_INC_PC		// This goes FIRST in RST
+		1:	`EXEC_WRITE(`_SP - 1, `_PCH)
+		2:	`EXEC_WRITE(`_SP - 2, `_PCL)
 		3:	begin
-				`EXEC_NEWCYCLE;
-				{registers[`REG_PCH],registers[`REG_PCL]} <=
-					{10'b0,opcode[5:3],3'b0};
+				`EXEC_NEWCYCLE
+				`_PC <= {10'b0,opcode[5:3],3'b0};
 			end
 		endcase
 	end
@@ -29,8 +18,7 @@
 		0:	begin /* type F */ end
 		1:	begin /* type F */ end
 		2:	begin /* type F */ end
-		3:	{registers[`REG_SPH],registers[`REG_SPL]} <=
-				{registers[`REG_SPH],registers[`REG_SPL]}-2;
+		3:	`_SP <= `_SP - 2;
 		endcase
 	end
 `endif