it's a futaba servo..i found some code for generating PWM for 8051 family of uC but it is not enough and i don't know what to do further..if anyone wants to help me make this work i will be more than grateful...

PWMPIN EQU P1.0  ;PWM output pin

SJMP PWM_SETUP

ORG 000Bh
LJMP TIMER0_INTERRUPT

PWM_SETUP:MOV TMOD,#00h  ;Timer 0 in mode 0
        MOV R7,#160   ;set pulse width control   ;this is a random value
        SETB EA    ;enable interrupts
        SETB ET0   ;enable timer 0 interrupt
        SETB TR0   ;start timer 0
        RET

TIMER0_INTERRUPT:JB F0,HIGH_DONE;  if F0=1 then we just finished the
                                     ;high section of the cycle so jump to
                                       ;HIGH_DONE
LOW_DONE:       SETB F0    ;make F0=1 to indicate start of high section
        SETB PWMPIN     ;make PWM output pin HIGH
        MOV TH0,R7     ;load high byte of timer with R7        
        CLR TF0      ;clear timer 0 interrupt flag
        RETI

HIGH_DONE:      CLR F0   ;make F0=0 to indicate start of low section
        CLR PWMPIN   ;make PWM output pin LOW
        MOV A, #0FFh   ;load A with 255
        CLR C    ;clear Carry flag so it does not affect the subtraction
        SUBB A,R7 ;A=255-R7
        MOV TH0,A   ;low high byte with the value of A
        CLR TF0  ;clear timer 0 interrupt flag
        RETI 

END
 

from what i read here http://www.seattlerobotics.org/guide/servos.html to rotate the servo from 0 to 90 degrees i have to apply a pulse with the length of 1,5 ms to the control wire(this means that the duty cycle is 7,5%??)

here are the specifications for the servo
http://www.gpdealera.com/cgi-bin/wgainf100p.pgm?I=FUTM0031