ack/plat/msdos86/libsys/sys_exists.s

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#
! $Source$
! $State$
! $Revision$
! Declare segments (the order is important).
.sect .text
.sect .rom
.sect .data
.sect .bss
.sect .text
! Say whether a file exists with the given name.
.define __sys_exists
__sys_exists:
mov bx, sp
mov dx, 2(bx)
mov ax, 0x4300
int 0x21
sbb ax, ax
inc ax
ret