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/*
* Copyright 1996-2002 - Karl R. Hakimian and David Fries
*
* This file is part of datalink.
*
* Datalink is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Datalink is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with datalink (see COPYING); if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <unistd.h>
#include <stdio.h>
#include <vga.h>
#include "datalink.h"
#include "datalink_macros.h"
int send_data(int type, unsigned char **packets, int npckts)
{
int i;
register int j;
register unsigned char byte;
unsigned char white[80];
unsigned char black[80];
int inc = (type == DATALINK_70) ? 1 : 2;
for (i = 0; i < 80; i++)
{
white[i] = 0xff;
black[i] = 0x00;
}
/* Become root to set vga mode. */
seteuid(0);
vga_init();
/* This is redundant - vga_init() should do this itself... */
/* but there's no harm in being sure */
seteuid(getuid());
#ifdef MACH64_HACK
/* For some reason, the latest mach 64 svga driver requires root on the
next call even though vga_init gave up root privileges. */
seteuid(0);
#endif
vga_setmode(G640x480x2);
#ifdef MACH64_HACK
seteuid(getuid());
#endif
SYNC DATASTART for (i = 0; i < npckts; i++)
{
for (j = 0; j <= *packets[i]; j += inc)
{
vga_waitretrace();
byte = packets[i][j];
WRITE_BYTE1(1, byte) if (type == DATALINK_70)
continue;
if (j + 1 == packets[i][0])
WRITE_BYTE2(0, 0xff)
else
{
byte = packets[i][j + 1];
WRITE_BYTE2(1, byte)}
}
END_PACKET}
#ifdef MACH64_HACK
/* For some reason, the latest mach 64 svga driver requires root on the
next call even though vga_init gave up root privileges. */
seteuid(0);
#endif
vga_setmode(TEXT);
#ifdef MACH64_HACK
seteuid(getuid());
#endif
return 0;
}
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