JavaCard OS

For the project requirement, I am developing an applet to anwser to some specific commands.

But some of these commands are only 2 byte length, which don't match with APDU standard length - 4 byte.
And the response I get from the applet is only 0x6881. So I wonder if there is a way to do handle short commands.

Thanks.

Describe your question clearer, then we can give you specific help.

As shown in the following code, When I sent 0x00, it works, but with other, I got error status word.