X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/77ab69d7bb0902e6ebf0994159ed2205f8413e34..b057a5d6e6db6db06ae33703ca72cd235eec91d6:/core/insn_rst.v

diff --git a/core/insn_rst.v b/core/insn_rst.v
new file mode 100644
index 0000000..4b65032
--- /dev/null
+++ b/core/insn_rst.v
@@ -0,0 +1,24 @@
+`ifdef EXECUTE
+	`INSN_RST: begin
+		case (cycle)
+		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
+				`_PC <= {10'b0,opcode[5:3],3'b0};
+			end
+		endcase
+	end
+`endif
+
+`ifdef WRITEBACK
+	`INSN_RST: begin
+		case (cycle)
+		0:	begin /* type F */ end
+		1:	begin /* type F */ end
+		2:	begin /* type F */ end
+		3:	`_SP <= `_SP - 2;
+		endcase
+	end
+`endif