added i2c controller functions, added IDE interface functions, fiexd IDE schematics

PLDs/Z8C-IDE-Board-U8/Z8C-Mainboard.pld

@@ -0,0 +1,32 @@
+Name       XXXXX;
+Partno     XXXXX;
+Date       XX/XX/XX;
+Revision   XX;
+Designer   XXXXX;
+Company    XXXXX;
+Assembly   XXXXX;
+Location   XXXXX;
+DEVICE g16v8a;
+
+Pin 1 = CS;
+Pin 2 = A1;
+Pin 3 = A2;
+Pin 4 = A3;
+Pin 5 = A4;
+Pin 9 = IOREQ;
+Pin 11 = WR;
+Pin 8 = RD;
+
+Pin 13 = CS_LATCH;
+Pin 14 = CS_FDC;
+Pin 15 = CS_IDE;
+Pin 12 = BUSDIR;
+
+Pin 17 = BUS_WAIT;
+Pin 18 = CLK2;
+Pin 19 = CLK4;
+
+
+CS_IDE = !(!IOREQ & !CS & !A2 );
+BUSDIR = !CS & !RD;
+BUS_WAIT = 'b'0;