lea sincos_1024,a0

        lea 512(a0),a0          ; a0 = 2nd Quadrant Start
        lea 2(a0),a1            ; a1 = 1st Quadrant End + 2
        moveq   #11,d0              ; d0.l = x = 11
        moveq   #1,d1
        ror.w   #2,d1               ; d1.l = y = 16384
        move.w  #163,d2             ; d2 = Q = magic division value = 512/PI (162.97466)
        move.w  #256-1,d7           ; 256 values in quadrant
.loop:
        move.l  d1,d3
        divu    d2,d3
        add.w   d3,d0               ; x = x + (y / Q)
        move.l  d0,d3
        divu    d2,d3
        sub.w   d3,d1               ; y = y - (x / Q)
        move.w  d1,d3
        neg.w   d3
        move.w  d3,1024(a0)         ; write 4th Quadrant
        move.w  d3,1022(a1)         ; write 3rd Quadrant
        move.w  d1,(a0)+            ; Write 2nd Quadrant
        move.w  d1,-(a1)            ; Write 1st Quadrant
        dbra    d7,.loop

        clr.w   -(a1)               ; Set SinTable index 0 to 0
        clr.w   (a0)                ; Set SinTable index 512 to 0