T=0 development

Hello, I've try to implement existing T=0 command specification on ZC5.4H, and have a trouble with several commands. The most what I dont know how to create is command to receive data from card... Other words how to initiate command "outgoing data only" ?

1. I know that card contain XX bytes for me, and I need to retrieve it
2. The command form is:
D0 CA 00 00 [XX] where
D0 - Cla,
CA - Ins
P1 = P2 = 00
XX - required data length (may vary)
3. Card contain for example 6 bytes for me
4. Exchage should happens if XX correct
IFD -> ICC : D0 CA 00 00 06
IFD ICC : D0 CA 00 00 06
IFD ICC : D0 CA 00 00 05
IFD 0 then
SW1 = &H96 : SW2 = TotalDataLength
else if
SW1SW2 = swCommandOk
end if
End Command

So this work. But I can't check what XX (P3) contain correct value , because in this type of command (outgoing data only), Lc parameter always 0

Follow Ups:

• Re: T=0 development loud 08:58:02 04/03/08 (1)
  • Re: Re: T=0 development loud 09:02:07 04/03/08 (0)