02-28-2002
I have never used an EBCDIC machine, and had no idea that there was a correspondence ...
I sort of 'grew up' with itoa, it was defined like this:
char *itoa(int base, char *buf)
The reason is probably that it was coded in 8086 assembly under DOS, most low-level routines were.
About making a converter, though, I think it is much better with a table, conversion should boil down to an XLAT on Intel, and probably something to that effect on other processors.
Atle
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VM86(2) Linux Programmer's Manual VM86(2)
NAME
vm86old, vm86 - enter virtual 8086 mode
SYNOPSIS
#include <sys/vm86.h>
int vm86old(struct vm86_struct *info);
int vm86(unsigned long fn, struct vm86plus_struct *v86);
DESCRIPTION
The system call vm86() was introduced in Linux 0.97p2. In Linux 2.1.15 and 2.0.28 it was renamed to vm86old(), and a new vm86() was intro-
duced. The definition of struct vm86_struct was changed in 1.1.8 and 1.1.9.
These calls cause the process to enter VM86 mode (virtual-8086 in Intel literature), and are used by dosemu.
VM86 mode is an emulation of real mode within a protected mode task.
RETURN VALUE
On success, zero is returned. On error, -1 is returned, and errno is set appropriately.
ERRORS
EFAULT This return value is specific to i386 and indicates a problem with getting user-space data.
ENOSYS This return value indicates the call is not implemented on the present architecture.
EPERM Saved kernel stack exists. (This is a kernel sanity check; the saved stack should only exist within vm86 mode itself.)
CONFORMING TO
This call is specific to Linux on 32-bit Intel processors, and should not be used in programs intended to be portable.
COLOPHON
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2009-02-20 VM86(2)