我是x86汇编程序的新手，无法识别给定代码中的问题。它应画一个圆圈，但我得到单点。这是FASM语法中的代码：
org 100h
mov ax, 0x0013
int 10h ;setting gtx mode
mov cx,200 ;number of iterations
mov ax,0xa000 ;beggining of gfx memory segment
mov es,ax
lp:
call calculate ;calculating the X and Y
mov ax,320 ;Y value multiplied by 320
mov bx,Yresult
add bx,100 ;adding the radius so the circle is drawn in center
mul bx ;computing the memory byte where the point will be placed
add ax,Xresult ;adding X
mov di,ax ;sending value to DI
mov byte [es:di],6 ;drawing the point
dec cx ;decreasing the loop variable
jnz lp ;jump if not 0
ret
calculate:
fninit ;resetting registers
fld dword[kat] ;loading the angle
fadd dword[addition] ;changing the angle each time the procedure is called
fst dword[kat] ;saving the angle
fidiv word[angle] ;radians to angles: ang/180*pi
fldpi ;loading PI
fmul st0,st1 ;multiplying angle/180*PI
fsincos ;cos & sin in st0&st1
fimul word[radius] ;multiplying cos and sine by radius of circle
fincstp
fimul word[radius]
fdecstp
fistp word[Xresult] ;storing integers for X and Y
fistp word[Yresult]
ret
angle dw 180
addition DD 1.0 ;how much the angle will be changed
kat DD 1.0 ;current angle, this is changed every call
radius dw 100 ;radius of the circle
Xresult dw 0 ;X var
Yresult dw 0 ;Y var
我检查了所有说明，似乎它们使用得当。也许问题是x86 / x87的时间问题？