Everything is possible my friend :)
Hardware: first of all u will need interface between PC and 8051. A good soloution is MAX233 (or max232 u will need some external caps). Connect pins P3.0(receive), P3.1(transmit) of 8051 to MAX233 to change TTL to RS232 voltage levels.
Software:
initialize SCON
use mode 1 8-bit UART (baud rate variable)

to transmit data from uC to ur PC use the instruction

clr ti
mov sbuf,A (@r0,..)
jnb ti,$ ;wait ..when ti=1
; transmit buffer is empty
clr ti
....
Vasilis