Hi, everybody:

I did this PC keyboard and 8051 for several days.

We have connected pc keyboard with 8051 exactly same as philips application note..

I followed the software and get single key correctly. But now I found that CAPS LOCK and NUM LOCK keys don't work. I examine the lookup table, there is no data for these two keys. so I put 14H for CAPS LOCK and 90H for NUM LOCK, but they don't work. I am very confusing now.

what the questions of mine are
1. can I put this 14h or 90h in unshift table? or I need a separate table?

2. what is correct ASCII for NUM LOCK AND CAPS LOCK?


I appreciate all the helps..

Regards

Frank