I know that what Mahmood is saying is completely true. No knowledge of Assembly is required with KEIL. For example if you want to write a high to Port 1 in 8252 you just write in Keil:
P1 = 0xFF;
if you want to use timer 0 as a 1 ms timer:
TMOD = 0x11;

//--- Timer 0 used to generate 1ms
TH0 = 0xF8; // Init timer 0
TL0 = 0xCC; // Init timer 0
TR0 = 1; // Start timer 0
and the list goes on.
Listen 1 in life: Do not be hasty in your Judgment. It is obviuous that this Peter fellow knows nothing whatsoever about c.
Cheers
Omar