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Index > OS Construction > whats wrong with this cursor code?

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Redragon



Joined: 27 Nov 2004
Posts: 101
Location: U.S.
Redragon
one thing i probably need to do is get the irq up and going..this code is called after vesa is setup..the cursor file is the cursor using this type of drawing..

i.e. B1 equ 00030303h
i.e. B1,00,B1,00,B1

im not sure what wrong with it or if its even right, but any help would be appreciated (fasm) ..thanks
Code:
include  '/INCLUDES/cursor.inc'
mov   ax,012h            ;set large graphics cursor block
mov   ax,cursor
mov   bh,16              ;cursor width in words
mov   ch,16              ;rows in cursor
mov   bl,1               ;horizontal hot spot
mov   cl,1               ;vertical hot spot
;es:dx                   ;bitmap of screen and cursor maps
int 33h                  ;enables the mouse interrupt
;#####################################################################
mov   ax,004h            ;position mouse cursor
mov   cx,320             ;column
mov   dx,250             ;row
int 33h                  ;enables the mouse interrupt
;#####################################################################
mov   ax,007h            ;define horizontal cursor range
mov   cx,800             ;minimum column
mov   dx,800             ;maximum column
int 33h
;#####################################################################
mov   ax,008h            ;define vertical cursor range
mov   cx,600             ;minimum column
mov   dx,600             ;maximum column
int 33h
;#####################################################################
mov   ax,01h             ;show mouse cursor
int 33h                  ;enables the mouse interrupt  
    
Post 16 Mar 2005, 01:47
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liteonish



Joined: 24 Feb 2005
Posts: 26
liteonish
Redragon wrote:
Code:
mov   ax,012h            ;set large graphics cursor block
mov   ax,cursor    

There are several possibilities with that part alone. Firstly, you're moving two values to ax one after the other, overwriting the second one with the first. Secondly, you're moving the address of cursor, not its value. (Unless it's something special and not a label. Smile)

So maybe do a
Code:
mov  ah,[cursor]    
but I'm not sure what the int requires, so that probably won't work.

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Post 16 Mar 2005, 13:12
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