diff options
| author | Michael Shalayeff <mickey@cvs.openbsd.org> | 2000-10-18 15:22:36 +0000 |
|---|---|---|
| committer | Michael Shalayeff <mickey@cvs.openbsd.org> | 2000-10-18 15:22:36 +0000 |
| commit | 3ec32f4232aa46d9bcb39dffb8073b6023ff9efc (patch) | |
| tree | 50e7e803c0c2de520abb3491e15df23d775e9503 /sys | |
| parent | bd58678178780033331f80a86a52a9ab852371d8 (diff) | |
before sending a character check for DSR state.
from: Martin Portmann <map@infinitum.ch>
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/arch/i386/stand/libsa/bioscons.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/sys/arch/i386/stand/libsa/bioscons.c b/sys/arch/i386/stand/libsa/bioscons.c index 28ae82f16ac..7d33f87cb7d 100644 --- a/sys/arch/i386/stand/libsa/bioscons.c +++ b/sys/arch/i386/stand/libsa/bioscons.c @@ -1,4 +1,4 @@ -/* $OpenBSD: bioscons.c,v 1.18 2000/06/08 01:51:32 mickey Exp $ */ +/* $OpenBSD: bioscons.c,v 1.19 2000/10/18 15:22:35 mickey Exp $ */ /* * Copyright (c) 1997-1999 Michael Shalayeff @@ -212,7 +212,16 @@ com_putc(dev, c) { register int rv; + dev = minor(dev) & 0x7f; + + /* check online (DSR) */ + __asm __volatile(DOINT(0x14) : "=a" (rv) : + "0" (0x300), "d" (dev) : "%ecx", "cc" ); + if ( !(rv & 0x20) ) + return; + + /* send character */ __asm __volatile(DOINT(0x14) : "=a" (rv) : - "d" (minor(dev)), "0" (c | 0x100) : "%ecx", "cc" ); + "0" (c | 0x100), "d" (dev) : "%ecx", "cc" ); } |