ack/plat/msdos86/libsys/sys_isreadyr.s

29 lines
384 B
ArmAsm

#
! $Source$
! $State$
! $Revision$
! 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 bx, sp
mov ax, 0x4406
mov bx, 2(bx)
int 0x21
jnc ok
movb al, 0
ok:
cbw
ret