I am also stuck-up at same place.

Done all three steps

1. send entry code
0f2h 0fdh 0feh

2. psc verify
0cdh 0feh 0ff
wait for i/o goes to low *

3. send second psc byte
0cdh 0ff 0ffh
wait for i/o goes to low *

4. write byte

-------------------
* if we wait for low or high, Do we have
to provide clocks while waiting?

I have tried varifying PSC from external CyberMouse-external card reader
and it works ok.
The card, psc varified by CyberMouse, can allow writing in my 8051 system!!!

So its clear, writing routine is ok and problem lies in psc varification and most probably
in clock and i/o waiting

can anyone help me with that?


KaPiL