I have 8 LEDs coming off of a 7490 Decade counter......now one decade counter only has 4 outputs for ABCD......Does a second 7490 pick up the EFGH or is that just another ABCD, Obviously, you can't jumper each one because they have specific pins such as the 4 inputs and 4 outs, the Vcc and GND, along with the 2 clocks....so my question is this....I have a Frequency input going into the decade counters....do I jumper each pin with the input so I can get my BCD @ my LEDs?