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

diff --git a/core/insn_ldbcde_a.v b/core/insn_ldbcde_a.v
new file mode 100644
index 0000000..2a91dc6
--- /dev/null
+++ b/core/insn_ldbcde_a.v
@@ -0,0 +1,26 @@
+`ifdef EXECUTE
+	`INSN_LDBCDE_A: begin
+		case (cycle)
+		0:	if (opcode[3]) begin
+				if (opcode[4]) begin `EXEC_READ(`_DE) end
+				else begin `EXEC_READ(`_BC) end
+			end else begin
+				if (opcode[4]) begin `EXEC_WRITE(`_DE, `_A) end
+				else begin `EXEC_WRITE(`_BC, `_A) end
+			end
+		1:	begin
+				`EXEC_INC_PC
+				`EXEC_NEWCYCLE
+			end
+		endcase
+	end
+`endif
+
+`ifdef WRITEBACK
+	`INSN_LDBCDE_A: begin
+		case (cycle)
+		0:	begin end
+		1:	if (opcode[3]) `_A <= rdata;
+		endcase
+	end
+`endif