diff options
Diffstat (limited to 'newlib/libc/sys/go32/kbhit.s')
| -rw-r--r-- | newlib/libc/sys/go32/kbhit.s | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/newlib/libc/sys/go32/kbhit.s b/newlib/libc/sys/go32/kbhit.s new file mode 100644 index 00000000000..0f34e1b76ec --- /dev/null +++ b/newlib/libc/sys/go32/kbhit.s @@ -0,0 +1,51 @@ +/* This is file KBHIT.S */ +/* +** Copyright (C) 1993 DJ Delorie, 24 Kirsten Ave, Rochester NH 03867-2954 +** +** This file is distributed under the terms listed in the document +** "copying.dj", available from DJ Delorie at the address above. +** A copy of "copying.dj" should accompany this file; if not, a copy +** should be available from where this file was obtained. This file +** may not be distributed without a verbatim copy of "copying.dj". +** +** This file is distributed WITHOUT ANY WARRANTY; without even the implied +** warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +*/ + + .globl _kbhit +_kbhit: + pushl %ebp + movl %esp,%ebp + pushl %ebx + pushl %esi + pushl %edi + +try_again: + movl $0x41a,%eax + call dosmemsetup + movzwl %gs:(%eax),%ebx + movzwl %gs:2(%eax),%ecx + cmp %ebx,%ecx + je key_not_hit + + movb $0x11,%ah + int $0x16 + jz key_not_hit + cmp $0,%eax + jne key_hit + movb $0x10,%ah + int $0x16 + jmp try_again + +key_not_hit: + movl $0,%eax + jmp L1 + +key_hit: + movl $1,%eax +L1: + popl %edi + popl %esi + popl %ebx + leave + ret |