Network Packager

Problem

There is an Ethernet card that lacks checksum calculation and you are required to add this functionality. The Ethernet card is to get 4 bits at a time from the CPU and collect until it has 16 bits. Then it adds the 4, 4 bit numbers and uses the lower four bits for checksum, thus making a total of 20 bits. It then sends one bit with every clock cycle until the buffer is empty. During transmission it does not receive new data from the CPU.

Input

Clock Pulse CP

Input Available IA
Data D0…D3

Output

Output Available OA

Output Data OD

 

please help me....

 

Way too little information. Make and model of the network card, how you are using it.

I buy network cards for $2-10 each. At that price if it doesn't work it isn't worth messing with.

 

ok but i have made a high level diagram
can you check it and let me know whether it is correct or not?

 

This sounds like school work. Is this school work?

 

yeah i have to give a presentation tomorow,than a question answer session and than implementation

 

any kind of help?