Hi All,

After a little direction here if anyone can help.

What I need to do is read a 8 bit binary word say on porta, look up a value and output this binary value on portb.

But I would need to keep polling the trigger word on porta to see if it changes.

eg 00110011 input

lookup code 00110011 means an output of 11000011 is required.

output 11000011 on portb

keep the output constant until input changes (loop)

In the good old days - i would use a eprom and program it to act as a simple data converter with a bit of discrete logic to track any address changes on the address lines.

Any direction would be great

Many Thanks


Moz