Your strategy to get help here is " aggressive " wrong.
My suggestion is to write small program, which will test 93c66 task, not display, counter and so on. Post short code, nobody wants to "learn" Your code.

2 errors :
- Your delay() routine is useless, it doesnt uses timer, it just writes something in timer register. Your timer_isr() routine is too complex.
It should only fire some flag and reload timer, main() should handle this timer flag.

regards