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.\" Copyright 1993 Rickard E. Faith (faith@cs.unc.edu)
.\" Copyright 1997 Andries E. Brouwer (aeb@cwi.nl)
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.\" Translated into Spanish Fri Feb 13 16:49:57 CET 1998 by Gerardo
.\" Aburruzaga García <gerardo.aburruzaga@uca.es>
.\"
.TH VM86 2 "17 julio 1997" "Linux 2.1.15" "Manual del Programador de Linux"
.SH NOMBRE
vm86old, vm86 \- entra en el modo virtual del 8086
.SH SINOPSIS
.B #include <sys/vm86.h>
.sp
.BI "int vm86old(struct vm86_struct * " info );
.sp
.BI "int vm86(unsigned long " fn ", struct vm86plus_struct * " v86 );
.SH DESCRIPCIÓN
La llamada al sistema
.B vm86
fue introducida en Linux 0.97p2. En Linux 2.1.15 y 2.0.28 se renombró como
.BR vm86old ,
y se introdujo una nueva
.BR vm86 .
La definición de la `struct vm86_struct' se cambió
en 1.1.8 y 1.1.9.
.LP
Estas llamadas hacen que el proceso entre en el modo VM86, y las emplea
.BR dosemu " (" dos (1)).
.SH "VALOR DEVUELTO"
En caso de éxito, se devuelve cero. En caso de error, se devuelve \-1
y se pone en
.I errno
un valor apropiado.
.SH ERRORES
(para
.BR vm86old )
.TP
.B EPERM
Existe la pila del núcleo salvaguardada. (Ésta es una comprobación
prudencial del núcleo; la pila salvaguardada sólo existe dentro del
propio modo vm86.)
.SH "CONFORME A"
Esta llamada es específica de Linux en procesadores de Intel, y no
debería emplearse en programas pretendidamente transportables.