Hi Stefan,
MOV T2CON, #00h; is OK, But
MOV T2MOD, #4 ; I could not get it
Below is the part of datasheet that I'm refering to...

 
Table 10-2. T2MOD – Timer 2 Mode Control Register
T2MOD Address = 0C9H Reset Value = XXXX XX00B
Not Bit Addressable

T2MOD:
    ______________________________________
    | – | – | – | – | – | – |T2OE | DCEN |
    --------------------------------------
Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1   |   0  |
    -------------------------------------- 
Symbol Function:
*(–)= Not implemented, reserved for future.

T2OE= Timer 2 Output Enable bit

DCEN= When set, this bit allows Timer 2 to be configured as 
an up/down counter.

To me, it appears that T2MOD can not be loaded above #3.
Please correct me if I'm wrong. Any link to Correct T2MOD Bits will be of great help.


Yes, The suggestion is appriciated. I knew PUSH & POP should be used while entering & leaving ISR so that the registers used do not affect other part of the program after ISR. I just avoided doing that because I've used R2 only once there, and also PSW is not used/ reffered elsewhere in the program.

Also, as you have mentioned, P1.1 (LED) goes LOW or HIGH in DISPLAY subroutine, and this is causing TF2 SET.
So, how do I come out of this now?

Thanks.