X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/b057a5d6e6db6db06ae33703ca72cd235eec91d6..99b9687942367fd256a797bcd1f67fec07f92a37:/core/insn_incdec_hl.v

diff --git a/core/insn_incdec_hl.v b/core/insn_incdec_hl.v
index abfe495..656353a 100644
--- a/core/insn_incdec_hl.v
+++ b/core/insn_incdec_hl.v
@@ -1,8 +1,13 @@
+`define INSN_INCDEC_HL		9'b00011010x
+
 `ifdef EXECUTE
 	`INSN_INCDEC_HL: begin
 		case (cycle)
 		0:	`EXEC_READ(`_HL)
-		1:	`EXEC_WRITE(`_HL, rdata + (opcode[0] ? 8'hFF : 8'h01))
+		1:	begin
+				`EXEC_WRITE(`_HL, rdata + (opcode[0] ? 8'hFF : 8'h01))
+				tmp <= rdata + (opcode[0] ? 8'hFF : 8'h01);
+			end
 		2:	begin
 				`EXEC_INC_PC
 				`EXEC_NEWCYCLE
@@ -13,6 +18,12 @@
 
 `ifdef WRITEBACK
 	`INSN_INCDEC_HL: begin
-		/* meh meh */
+		if (cycle == 1)
+			`_F <= {
+				(tmp == 8'h00) ? 1'b1 : 1'b0,	/* Z */
+				opcode[0],	 /* N */
+				(tmp[3:0] == (opcode[0] ? 4'hF : 4'h0)) ? 1'b1 : 1'b0,
+				`_F[4:0]
+			};
 	end
 `endif