ack/plat/msdos386/libsys/sys_isreadyr.s
David Given dc1f69be83 Most of read and write now works; filename-based operations partially work; but
there's a nasty memory corruption somewhere which needs investigating.
2022-08-19 00:08:57 +02:00

30 lines
399 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 ebx, esp
mov eax, 0x4406
mov ebx, 4(ebx)
int 0x21
jnc ok
movb al, 0
ok:
o16 cbw
cwde
ret