home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Multimedia Plus
/
Multimedia Plus with ClearVue Version 10-94 (Knowledge Media Inc.).ISO
/
dos
/
anim
/
flilib
/
flisrc
/
normptr.asm
< prev
next >
Wrap
Assembly Source File
|
1989-11-10
|
1KB
|
65 lines
TITLE normptr
_TEXT SEGMENT BYTE PUBLIC 'CODE'
_TEXT ENDS
_DATA SEGMENT WORD PUBLIC 'DATA'
_DATA ENDS
CONST SEGMENT WORD PUBLIC 'CONST'
CONST ENDS
_BSS SEGMENT WORD PUBLIC 'BSS'
_BSS ENDS
DGROUP GROUP CONST, _BSS, _DATA
ASSUME CS: _TEXT, DS: DGROUP, SS: DGROUP, ES: DGROUP
_TEXT SEGMENT
PUBLIC _i86_norm_ptr
;i86_norm_ptr(offset, seg)
;Add as much as possible of the offset of a pointer to the segment
_i86_norm_ptr PROC far
push bp
mov bp,sp
push cx
mov ax,[bp+4+2] ;offset
mov dx,[bp+6+2] ;segment
mov cl,4
shr ax,cl
add dx,ax
mov ax,[bp+4+2] ;offset
and ax,15
pop cx
pop bp
ret
_i86_norm_ptr ENDP
PUBLIC _i86_enorm_ptr
;i86_norm_ptr(offset, seg)
;Add as much as possible of the offset of a pointer to the segment
;and make it evenly alligned...
_i86_enorm_ptr PROC far
push bp
mov bp,sp
push cx
mov ax,[bp+4+2] ;offset
mov dx,[bp+6+2] ;segment
inc ax
and ax,0FFFEh ;force even allignment
mov [bp+4+2],ax ;and save...
mov cl,4
shr ax,cl
add dx,ax
mov ax,[bp+4+2] ;offset
and ax,15
pop cx
pop bp
ret
_i86_enorm_ptr ENDP
_TEXT ENDS
END