X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/eb0f2fe1637a4c6b4532ae08ff7b0af3bf39aef0..3ad960bdb71efcbb1dfd436163085da0d70eb699:/insn_ldh_ac.v

diff --git a/insn_ldh_ac.v b/insn_ldh_ac.v
new file mode 100644
index 0000000..146f10b
--- /dev/null
+++ b/insn_ldh_ac.v
@@ -0,0 +1,30 @@
+`ifdef EXECUTE
+	`INSN_LDH_AC: begin
+		case (cycle)
+		0:	begin
+				address <= {8'hFF,registers[`REG_C]};
+				if (opcode[4]) begin	// LD A,(C)
+					rd <= 1;
+				end else begin
+					wr <= 1;
+					wdata <= registers[`REG_A];
+				end
+			end
+		1:	begin
+				`EXEC_NEWCYCLE;
+				`EXEC_INC_PC;
+			end
+		endcase
+	end
+`endif
+
+`ifdef WRITEBACK
+	`INSN_LDH_AC: begin
+		case (cycle)
+		0:	begin /* Type F */ end
+		1:	if (opcode[4])
+				registers[`REG_A] <= rdata;
+		endcase
+	end
+`endif
+