ack/plat/msdos386/libsys/sys_isreadyr.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 descriptor is ready for input, i.e. reading from the
! fd will immediately return something.
.define __sys_isreadyr
__sys_isreadyr:
mov ebx, sp
mov eax, 0x4406
mov ebx, 4(ebx)
int 0x21
jnc ok
movb al, 0
ok:
cbw
cwd
ret